Natural Cholesterol Lowering

Lower Cholesterol Book

Scott Davis' e-Book Beat Cholesterol in 30 Days is a useful compendium of information about natural methods and foods to avoid to lower LDL (bad) cholesterol. While the book is extremely useful in categorizing what helps and harms people in terms of diet, it's not so much a full-fledged system as opposed to a guidebook on foods that will improve and worsen your cholesterol levels. Along with useful information about foods that raise, lower, and help with high cholesterol, the author has a number of helpful chapters, such as a list of foods to avoid to immediately begin lowering cholesterol, knowing the tell tale signs of a heart attack, and healthy recipes which will immediately lower your cholesterol levels. Like all the other Blue Heron Health News promoted health guides, the Beat Cholesterol in 30 Days guidebook will help you achieve better health using an all-natural method. Unlike most prescription drugs, this program ensures a risk-free solution to a reduced cholesterol level in a short span of time. This book will provide you with all there is to know about your silent killer enemy: cholesterol. Read more here...

Natural Cholesterol Guide Summary


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Familial Hypercholesterolemia

Capillaries Transcytosis

The significance of LDL receptors and receptor-mediated endocytosis is illustrated by a hereditary disease called familial hypercholesterolemia.31 People with this disease have an abnormally low number of LDL receptors. Their cells therefore absorb less cholesterol than normal, and the cholesterol remains in the blood. Their blood cholesterol levels may be as high as 1,200 mg dL, compared to a normal level of about 200 mg dL. People who inherit the gene from both parents typically have heart attacks before the age of 20 (sometimes even in infancy) and seldom survive beyond the age of 30.

Pleiotropic Effects of Statins

The word 'pleiotropic' usually is applied to genetics, referring to the multiple actions of a single gene. With regard to statin therapy for dyslipidemia, the term has become synonymous with clinical benefits of statins beyond the effects on lipoproteins. Hypercholesterolemia is strongly associated with coronary and vascular atherosclerotic disease. Atherosclerosis is mediated, in part, by the uptake of modified low-density lipoprotein (LDL) into the vessel wall. The predominant mechanism underlying the beneficial effects of statins is the inhibition of the enzyme HMG-CoA, thus blocking the early rate-limiting step in cholesterol biosynthesis. Therapeutic doses of statins reduce serum total and LDL cholesterol levels markedly in humans. without a significantly high cholesterol level. This has led to the hypothesis that statins may exert protective effects beyond cholesterol reduction. This was first noted in the subgroup analyses of the West of Scotland Coronary Prevention Study...

Relevant Vascular Effects of Statins

High cholesterol levels initiate endothelial activation followed by its dysfunction, which is observed even before plaque formation. Endothelial activation and dysfunction may relate to the decreased bioavailability of vasodilators such as NO, and or excess of vasoconstrictors such as endothelin. High cholesterol concentrations are responsible for endothelial activation, since endothelial function promptly improves after plasma LDL aphaeresis. This may explain the beneficial effects of statins which have a potent LDL-lowering property. However, in some studies restoration of endothelial function occurred even before a significant reduction in serum cholesterol levels was evident, suggesting that there are also cholesterol-independent effects of statins by which endothelial function improves 20 . Improvement in NO release with statins is associated with upregulation of eNOS mRNA and improvement of endothelial function. Since statins also increase NO production in humans at clinically...

Statins and Blood Pressure

Interactions between dyslipidemia and activation of neurohumoral systems, such as RAS, may not only explain the frequent coexistence of hypertension and dyslipidemia, but also play an important role in the pathogenesis of atherosclerosis. Experimental data suggest that the effects of Ang II and lipo-proteins on atherogenic risk are not independent and that the pathways by which Ang II and dyslipidemia lead to vascular disease may frequently overlap. There is a suggestion that the combined use of cholesterol-lowering drugs along with agents that modulate RAS may have additive benefits in the prevention and treatment of coronary artery disease, hypertension, and heart failure. Keidar et al. 30 harvested macrophages from the peritoneum after injection of Ang II in the rat, and observed that Ang II dramatically increased macrophage cellular cholesterol biosynthesis with no significant effect on blood pressure or on plasma cholesterol levels. Fosinopril and the AT1 receptor blocker...

Effects of Statins on Vascular Elasticity

Evidence for blood pressure-lowering effect of statins Table 2. Evidence for blood pressure-lowering effect of statins Statins (pravastatin or simvastatin) in addition to antihypertensive treatment Additive benefit of statins in lowering blood pressure Intensive cholesterol reduction with atorvastatin reduced large artery stiffness and blood pressure in normo-cholesterolemic patients with stage I isolated systolic hypertension The effects of statins on endothelium have been amply described, and include an increase in eNOS expression (and activity). Statins also reduce the generation of oxidant species in endothelial cells. These effects appear to be dose-dependent and are shared by all statins with minor inter-statin variability. Schmalfuss et al. 41 , in our laboratory, examined the effects of different statins on vascular endothelial cell growth. Whereas atorvastatin and simvas-tatin reduced endothelial cell growth in culture, pravastatin did not affect it. Increase in...

Mechanistic Basis of the Efficacy of Statins in Atherothrombosis

In addition to their well-documented effects on serum lipid levels, there are several other postulated mechanisms by which statins exert a variety of beneficial effects on the determinants of atherothrombosis. These effects are summarized in table 1. Most of these effects have been attributed to the modification of the altered biology of endothelial cells and vascular SMCs as well as coagulation and platelet activation pathways. In particular, statins enhance the activity of endothelial nitric oxide synthase (eNOS) and thereby the biosynthesis of the potent vasodilator and platelet inhibitor NO in vascular endothelial cells 5 . Statins also prevent degradation of NO by inhibiting the generation of oxidant species. Statins inhibit pre-proET-1 mRNA expression and reduce ET-1 release in bovine endothelial cells 6 . Recent studies show that statins decrease angiotensin II type 1 receptor expression in SMCs which is another potent vasoconstrictor and pro-fibrotic stimulus 7 . In addition,...


Hypercholesterolemia is a complication of cholestasis. Hypercholesterolemia has been classically reported in patients with PBC. Xanthomas and xanthelasmas can be identified in the skin of patients with PBC and hypercholesterolemia. Data available tend to suggest that high density lipoprotein is the dominant lipid fraction present in the serum of patients with PBC and hypercholesterolemia. Higher concentration of Apo(a) in the plasma of patients with PBC than in that of the control groups that have been included in the studies has been interpreted as being protective against complications secondary to atherosclerosis. The limited epidemiologic data available from retrospective studies indeed do not suggest that patients with PBC have a high risk for complications due to atherosclerosis. This observation, in conjunction with the characteristic lipid profile of PBC, has not supported the specific treatment of hypercholesterolemia in these patients. One study reported that patients with...


3-Hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors (statins) have been shown to improve vascular outcomes due to their cholesterol-lowering effects as well as multiple pleiotropic effects.28 In high-risk populations, statin therapy is known to reduce the risk of vascular events such as myocardial infarction and stroke. A meta-analysis of 10 trials involving 79,494 subjects29 showed that statin therapy reduced the incidence of stroke by 18 , major coronary events by 27 , and all-cause mortality by 15 . The SPARCL trial recently showed that high-dose HMG-CoA reductase inhibitors prevent recurrent stroke and transient ischemic attacks.30 that poststroke statin use (123 patients) predicted good functional outcome (measured by mRS and NIHSS scores) at 3 months.40 Clinical trials have also provided some evidence of improved poststroke outcomes with statin use. A small pilot study from Spain showed significant improvement in the 3-day and 90-day NIHSS scores in patients...

Treatment of Heart Disease

One risk factor for CVD is high blood cholesterol, or hypercholesterolemia. The diagnostic criteria for hypercholesterolemia are presented in Table I. The most prominent intervention effort aimed at treating hypercholesterolemia, initiated by the National Heart, Lung, and Blood Institute, is known as the National Cholesterol Education Program (NCEP). Table I National Cholesterol Education Program Guidelines for the Treatment of Hypercholesterolemia Table I National Cholesterol Education Program Guidelines for the Treatment of Hypercholesterolemia

Properties of the Coronary Microcirculation

Arginine for eNOS, asymmetric dimethylarginine. Abnormalities of G protein signaling, resulting in reduced activation of eNOS in response to endothelial cell receptor activation, have also been shown to occur. A substantial body of data suggests that in some of these conditions (hypercholesterolemia, hypertension, and diabetes), increased production of vascular superoxide (*O2-) occurs. Superoxide reacts very rapidly with NO*, leading to the formation of the toxic peroxynitrite anion. Although peroxynitrite can produce vasodilation, it is a very weak vasodilator, and as a result this reaction significantly reduces the amount of bio-available NO. The initial studies demonstrating abnormal endothelium-dependent vascular relaxation in various disease models were performed in larger vessels. Subsequent experiments have shown that most, if not all, of these disease processes also affect the coronary microcirculation in a similar fashion. This is of particular interest in the case of...

Lipids And Cardiovascular Disease

And lesions and are related to the course of myocardial infarction 116,122 . However, atherosclerotic plaque formation and the mechanisms for the ensuing increased morbidity and mortality are complex processes, which involve, for example, the production of superoxide by monocytes, and the formation of autoantibodies against oxidized LDL and MDA-LDL 123,124 , In aortic muscle or endothelial cells in vitro, oxidized LDL can increase collagen and fibronectin synthesis, apoptosis, intracellular calcium and TBA formation 122,125 , Moreover, concomitant pathologies such as hypertension are additional risk factors for the etiology of atherosclerosis. For example, in hypertension, ATC status as reflected by red blood cell (but not plasma), concentrations is lower than that of normotensive controls 126 , Age-related reductions in the anti-oxidant capacity of plasma, acting against peroxyl radicals, may also contribute to the atherosclerosis 127 , There is also a tentative association between...

Identification of ADAM10 as an asecretase in vitro and in cultured cells

As early as 1996 it was reported that high cholesterol concentrations in the medium of cultured cells inhibit secretion of soluble APP (Bodovitz and Klein 1996). A project was started in my group to investigate whether the a-secretase ADAM10 is a target of the cholesterol effects on APP metabolism and on the cellular mechanisms that might be involved. Treatment of various peripheral and neural cell lines with either the cholesterol-extracting agent methyl-p-cyclodextrin or the hydroxymethyl glutaryl-CoA reductase inhibitor lovastatin resulted in a drastic increase of secreted a-secretase-cleaved soluble APP. This strong stimulatory effect was in the range obtained with phorbol esters and was further increased in cells overexpressing ADAM10. In cells overexpressing APP, the increase of a-secretase activity resulted in a decreased secretion of Ap peptides. Several mechanisms were elucidated as being the basis of enhanced a-secretase activity increased membrane fluidity and impaired...

Impact of Lipid Reduction on Arterial Stiffness

In animal models of hypercholesterolaemia, cholesterol-lowering appears to reduce arterial stiffness 14, 15 . In man, a number of studies have addressed the effect of HMG-CoA reductase inhibitors (statins) on large artery stiffness (table 3). Kool et al. 32 failed to find any impact of pravastatin on carotid,

Acute microvascular effects of growth factors

B High-cholesterol diet B High-cholesterol diet Fig. 7. Microvascular reactivity studies after 4 wk of vascular endothelial growth factor (VEGF) treatment in a porcine model of myocardial ischemia with (B,C) or without (A) hypercholesterolemia-induced endothelial dysfunction. Graphs show percent relaxation to increasing concentrations of vasodilating agents following preconstriction with U46619. SNP, sodium nitroprusside ADP, adenosine diphosphate. From ref. 146. Fig. 7. Microvascular reactivity studies after 4 wk of vascular endothelial growth factor (VEGF) treatment in a porcine model of myocardial ischemia with (B,C) or without (A) hypercholesterolemia-induced endothelial dysfunction. Graphs show percent relaxation to increasing concentrations of vasodilating agents following preconstriction with U46619. SNP, sodium nitroprusside ADP, adenosine diphosphate. From ref. 146. Fig. 8. Post- vs prevascular endothelial growth factor (VEGF) treatment ratios of ischemic (left circumflex...

Liver Transplantation as Primary Therapy for Inborn Errors of Metabolism

Liver transplantation is required for many metabolic diseases because they produce end-stage liver disease or carry the potential for developing malignancy. Replacement of the liver also results in correction of the metabolic defect. Liver transplantation can also benefit children with inborn errors of metabolism that do not injure the liver. The principal goal of treatment is to correct the metabolic error. Examples of disorders that have been treated in this way include the urea cycle defects, Crigler-Najjar syndrome, homozygous familial hypercholesterolemia, and primary hyperoxaluria. The decision to apply liver transplantation is determined by the knowledge that it would correct the defect and that the patient has not experienced irreversible complications.

Preclinical models of therapeutic angiogenesis in peripheral arterial disease

Less complete endogenous angiogenic response to ischemia have been developed. Arterial ligation followed by complete excision of the femoral artery produces an ischemic normal limb flow ratio and a blunted angiogenic response that more closely mimics PAD, and intermittent claudication in particular (28,29). Subsequent administration of angiogenic growth factors or angiogenic gene therapy leads to more rapid and complete recovery, as manifested by enhanced collateral vessel development, increased capillary density, and improved calf blood pressure ratios (25-27,30-39,51). When arterial ligation and excision is applied to animal models with hypercholesterolemia, diabetes or hyperhomo-cystemia, an even more profound impairment in the endogenous angio-genic response, results, and this scenario is more analogous to critical limb ischemia (40-44). Therapeutic angiogenesis in this setting will seek to prevent limb loss (40-44). All of the angiogenic growth factors that have entered human...

Tamibarotene Anticancer [9396

Development of resistance to ATRA is partly attributed to a progressive decrease in plasma drug concentration because of the rapid upregulation of its catabolism, and partly to an increased expression of cytoplasmic retinoid-binding proteins (CRABP) which limit the amount of free drug. In an attempt to overcome these problems, tamibarotene was synthesized by the introduction of heteroatoms into ATRA-like structures. Tamibarotene exhibits an improved selectivity profile as compared with ATRA. It has slightly higher affinity for RARa (EC50 45 nM) than RARp and RARg (EC50 23 5 and 591 nM, respectively), and it is inactive against RXR. In addition, tamibarotene has little affinity for CRABPs and is active against CRABP-rich ATRA-resistant cells. In a clinical study involving 24 APL patients who had relapsed from ATRA induced complete remission (CR), 6mg m2 day of oral tamibarotene resulted in 14 (58 ) patients achieving a second CR. Adverse events included retinoic acid syndrome,...

Coadministration with other CYP3A enzymatic pathway drugs Clarithromycin cisapride terfenadine

Coadministration of statins and protease inhibitors. HIV-positive patients with hypercholesterolemia must be careful as to which statins are used when taking PIs such as delavirdine. For example, pravastatin and atorvastatin are recommended while lovastatin and simvastatin should be avoided. Although atorvas-tatin and delavirdine were coadministered as recommended, a case of rhabdomyolysis with acute renal failure has been reported (147).

Endothelial Regulation of the Coronary Microcirculation

Factor, endothelin, and reactive oxygen species. Among these various factors, NO plays a predominant role. The enzyme responsible for production of NO is eNOS (or NOS-3), a 133-kDa protein constitutively expressed by endothelial cells. The biochemical mechanisms responsible for function of the NO synthases have recently been elucidated. For all isoforms, an electron donor (nicotinamide adenine dinucleotide phosphate, or NADPH) binds to a site at the carboxyl terminus of the protein. Electrons are then transferred from NADPH to the flavins flavin-adenine dinucleotide (FAD) and flavin mononucleotide (FMN) noncovalently bound within the reductase domain. For the neuronal NOS and eNOS, electrons are stored on the flavins until the enzyme is activated by calcium calmodulin (Ca CaM). When calmodulin binds to the enzyme, electrons are transferred to a prosthetic heme group in the oxygenase domain. Upon heme reduction, catalysis of arginine to citrulline and NO occurs. The NO thus formed...

Role of nitric oxide in the angiogenic process

Convincing in vivo evidence that endothelial factors play a major role in mediating the angiogenic response was found in murine studies of apoE-hypercholesterolemic mice. These mice exhibit attenuated collateral vessel formation in response to a FGF-2 disk angiogenesis system in a hind-limb ischemia model (81,128). This inhibition was fully reversed by the oral administration of l-arginine, which is the substrate for endothelial NO production. In a porcine model of chronic myocardial ischemia, evidence was recently produced that hypercholesterolemia-

Cigarette Smoking And Cardiovascular Disease

Cigarette smoking-related cardiovascular diseases have been described widely. However, the mechanisms of their effects on cardiovascular system were not totally clear. The effects of nicotine and carbon monoxide on blood vessel walls, unfavorable lipid profiles, increased myocardial work and the decreased oxygen carrying capacity of the blood of smokers contribute to the overall effect of cigarette smoking on cardiovascular disease 3J. Of the increased cardiovascular risk caused by smoking, it is estimated that approximately one-tenth of this is due to smoking-induced changes in serum lipid 4 , The majority of studies indicate elevations in serum cholesterol, phospholipids, triglycerides, low-density lipoprotein (LDL) and increased hepatic lipase activity in smokers, with decreased serum high-density lipoprotein (HDL) cholesterol 5 , A mechanism to explain the link between smoking and some of the observed changes in serum lipid and lipoprotein concentrations includes the...

High Lowdensity Lipoprotein Levels

High LDL cholesterol levels have gained increasing importance over the past several years not only as a major cardiovascular risk factor, but also as a crucial target in primary and secondary prevention. The NCEP ATP III classifies LDL cholesterol levels of less than 100 mg dL as optimal, 100-129 mg dL as near or above optimal, 130-159 mg dL as borderline high, 160-189 mg dL as high, and greater than or equal to 190 mg dL as very high (Table 7.4)33. These classifications reflect the observation that patients with LDL cholesterol levels that were previously thought to be 'normal' or 'average' still demonstrate an increased risk for cardiovascular events when compared with patients with lower levels (Figure 7.11). Elevated levels of LDL cholesterol have been demonstrated in numerous studies to be associated with a significantly increased risk of cardiovascular events including coronary artery disease. In a study of 2541 white men with and without coronary artery disease, the...

Low Highdensity Lipoprotein Levels

While much of the current focus of therapy for dys-lipidemia centers on management of high LDL cholesterol, low HDL cholesterol levels have also been established as a major cardiovascular risk factor. In fact, the pattern of low HDL cholesterol levels with normal LDL cholesterol levels appears to represent a significant percentage of patients with coronary artery disease when compared with isolated high LDL cho-lesterol32. Low HDL cholesterol levels are also an important part of the criteria for the metabolic syndrome, which includes a constellation of other risk factors that place patients at a markedly increased risk for cardiovascular events. Low HDL cholesterol is defined by the Third Report of the National Cholesterol Education Program (NCEP) Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol As an independent risk factor, low HDL cholesterol levels have consistently been associated with an increased risk of cardiovascular disease. In the Fram-ingham...

Clinical Evidence of Cross Talk between Dyslipidemia and RAS Activation

O'Callaghan et al. 38 examined the effects of pravastatin in the setting of background antihypertensive therapy with ACE inhibitors and calcium antagonists. They treated 25 hypertensive hypercholesterolemic patients with 12 weeks of either pravastatin or placebo in this double-blind, placebo-controlled parallel group study. Placebo treatment did not alter plasma lipids, whereas 12 weeks of treatment with pravastatin reduced total cholesterol by 27 and LDL cholesterol by 35 . There was no change in systolic or diastolic blood pressure following 12 weeks of treatment or 3 weeks of withdrawal of pravastatin. Sposito et al. 39 demonstrated an additional effect of statins on blood pressure reduction by comparing patients receiving ACE inhibitors alone with those receiving these medications plus statins after 3 months of dietary intervention. Although blood pressure was similarly reduced at week 4, the statin-treated group had a greater reduction in blood pressure and total cholesterol...

Blood Pressure Management

As described in the corresponding section, patients with type II diabetes are particularly susceptible to lipid abnormalities. Lipid management strategies should be aimed at reducing LDL cholesterol, raising HDL cholesterol, and lowering triglycerides. Healthy lipid levels have shown to reduce the risk of cardiovascular complications and mortality. Lifestyle changes including nutritional changes, physical activity, smoking cessation, and weight loss should be considered as initial strategies to achieve lipid levels. Drug therapy including statins, fibrates, and niacin is indicated when lifestyle changes alone are ineffective.

Prevention Of Aortic Dissection

Optimal lipid lowering with statins is also indicated in individuals at risk for aortic dissection. Mechanistically, statins can directly modulate the biology of the aortic wall and suppress MMP-9 production by inhibiting the activation of neutrophils and macrophages. It is likely that such therapy could be useful for the prevention or treatment of aortic aneurysms6.

Alternative delivery modalities

Tissue engineering has also emerged as a feasible method for facilitated angiogenesis and or myogenesis, with myocardial transplant of myoblast-derived bioartifical muscles (BAMs) or three-dimensional fibroblast scaffolds as epicardial patches, increasing vascular growth up to threefold (178-180). Finally, angiogenic and myogenic processes may be augmented through mobilization of endogenous cells that may have intrinsic tropism for and biological activity within areas of cardiac injury. Toward this end, recent studies have examined ischemic injury alone, granulocyte colony stimulating factor (G-CSF) and granulocyte-macrophage colony stimulating factor (GM-CSF), VEGF, statins, and many other biological products for progenitor cell mobilization (15,181185). The efficacy of these methods in promoting cardiac angiogenesis and or myogenesis has yet to be fully established.

Therapeutic Trials and Their Meta Analyses

During the 30-year evolution of therapeutic trials and meta-analyses, it is evident that (1) the clinical face of hypertension has considerably changed, from severe and malignant to milder forms of hypertension, including systolic hypertension in the aged (2) the number of classes of antihypertensive agents has also increased, as a function of the discovery and commercialization of new antihypertensive agents (3) the concomitant use of non-anti-hypertensive agents, such as statins, has also markedly increased, and (4) no consistent differences have been sought in the strategy of drug treatment between men and women despite the well-established lower CV risk in women 7 .

Interventions Aimed at the Removal of the Pruritugens

The interventions that aim at the removal of the prurito-gen(s) in cholestasis have not been submitted to properly controlled clinical trials. Cholestyramine, colestipol, and, more recently colesevalam, are nonabsorbable anion exchange resins used to lower serum cholesterol. The resins are not absorbable, bind anions in the small intestine, and aim to enhance the fecal excretion of pruritogen(s). Cholestyramine is the most widely used medication prescribed to treat the pruritus of cholestasis. Many patients respond to cholestyramine with a decrease in their pruri Cholestyramine bid twice daily HAS hourly scratching activity IV intravenous N total number of patients PO by mouth tid 3 times daily VAS mean visual analogue scale. *Compared with an observational control group that did not receive cholestyramine but that received norethandrolone or no treatment. fPatients were allowed to continue taking cholestyramine during the study, the number of cholestyramine packs per day was counted....

Biliary Malabsorption

Malabsorption of bile acids should be suspected when there are no elements suggestive of steatorrhea, fecal incontinence, abnormal transit, or bacterial overgrowth. The 75Se-homocholic acid taurine test is the simplest method to determine bile acid absorption capacity, but it is not currently available. The abdominal retention of the radioisotope is measured after 4 and 7 days. An abdominal retention of the radioisotope of less than 10 at 7 days is considered positive for disturbance in bile acid absorption. Bile acid resin binders, such as cholestyramine 4 to 12 g d, colestipol or aluminium hydroxide, may provide relief.

Management options

Treatment with cholestyramine, antihistamines or topical preparations has variable success. Corticosteroids have also been used, but most women are now treated with ursodeoxycholic acid, which has been shown to improve symptoms and reduce serum bile acid levels. Both the mother and the neonate should receive vitamin K therapy.

Management of Recurrent C difficile

Anion binding resins have been used as an adjunct to antibiotic treatment for recurrent C. difficile. Cholestyramine (4 g given 3 to 4 times a day for 1 to 2 weeks) is the most commonly used regimen. However, because of its ability to bind vancomycin, cholestyramine and vancomycin should be given 2 to 3 hours apart. Prolonged course of metronidazole or vancomycin eg, metronidazole 250 to 500 mg tid for 14 days, then 250 mg for 21 days or vancomycin 125 mg qid for 14 days, then 125 mg bid for 21 days Further relapse Vancomycin plus cholestyramine 4 g bid or vancomycin 125 mg qid and rifampin 600 mg bid or therapy with microorganisms eg, Saccharomyces boulardii in combination with metronidazole or vancomycin or intravenous immunoglobulin

Symptomatic Therapy

Cholestyramine 1 pkt before and after breakfast Hypercholesterolemia Cholestyramine (first line) Statins safe (if needed) Although the specific cause of pruritus is unknown, there is a range of therapeutic options for this troublesome symptom. Although bile acids per se are not likely the cause of pruritus, there is clearly a pruritogen in bile. Consequently, the use of cholestyramine as a binding agent is generally very successful for cholestasis-induced pruritus. It is given before and after breakfast to coincide with maximal gallbladder emptying. Although effective, it is important to warn patients that it may cause constipation and that it will bind all medications taken within 4 hours of ingestion, including UDCA. If patients take cholestyramine in the morning, it is best that they take UDCA, calcium, and vitamin D in the evening. If cholestyramine is not well tolerated or is ineffective, the anti-tuberculous medication rifampicin can be used. Although rifampicin can occasionally...

Potential Outcomes And Causal Effects 21 Potential Outcomes

Figure 1 illustrates the observed cholesterol reduction for 337 patients in the Lipid Research Clinics Coronary Prevention Trial (LRC-CPPT) as a function of percentage of prescribed dose actually taken of cholestyr-amine and placebo, respectively. Smoothed curves are fit to the scatter-plots. The data in Figure 1 were analyzed by Efron and Feldman (1991), who treated cholesterol reduction and dose as continuous variables and focused on a linear model for the average reduction as function of dose and other covariates. For the same data Zeger (1998) used a dichotomized dose scale and response scale, and Goetghebeur and Molenberghs (1996) used an ordered categorical dose scale. It is clear from Figure 1 that the percentage ofthe dose actually taken varies between the two treatment arms, with a tendency for higher percentages in the placebo arm. Figure 1 also shows a steeper rise in cholesterol reduction in the treated group as function of percentage of prescribed dose. Although...

Nutritional Management

Maintenance of adequate fluid balance and nutritional status are important clinical tasks, especially in patients with malabsorption syndromes. Oral rehydration solutions may help maintain hydration status, but are hypocaloric and may promote wasting if used excessively. The goal of hydration therapy is to maximize fluid intake while minimizing diarrheal losses. A low fat, lactose-free diet may be beneficial and medium chain triglycerides are useful adjuncts in the treatment of patients with significant malabsorption. On the other hand, polymeric formula diets generally are tolerated poorly and lead to substantial diarrhea. A variety of antidiarrheal therapies may be used. Some patients with nonspecific diarrhea or ileal dysfunction respond well to the bile salt binding resin cholestyramine. The most commonly used antidiarrheal agents are loperamide and opiates, though escalating doses often are required. Octreotide has been used in the treatment of diarrhea of several etiologies,...

Medical Management General Concepts

However, the following concepts to guide therapy can be gleaned from examination of the literature and the personal experience of the authors. First, collage-nous lymphocytic colitis is an IBD that clinicopathologically responds to anti-inflammatory medications as used in idiopathic IBD (Crohn's disease and ulcerative colitis). Prompt improvement in diarrhea is noted in most patients, and histopathologic resolution of collagen banding is noted in some. Second, literature reports note a dramatic clinico-pathologic response with remission to antibacterial agents such as bismuth subsalicylate (Pepto-Bismol) in some patients. For these reasons, it may be prudent to attempt an initial trial of antibacterial treatment before using anti-inflammatory treatment. There are no studies of probiotics. Third, unless the patient has only mild diarrhea easily controlled by dietary restrictions, cholestyramine, and bulk or antimotility agents, a course of anti-inflammatory therapy...

Complications Of Urinary Diversions And Their Managements

The terminal ileum is the primary site for vitamin B12 and bile salt absorption. If long segments of terminal ileum are used to construct a urinary diversion, the patient may become vitamin B 12-depleted. This process may take 5 yr, however, to deplete the body's stores of this nutrient (26). Similarly, bile salts are reabsorbed in the ileum, so that resection of this portion of the bowel may cause a bile-salt osmotic diarrhea. This condition may be ameliorated with oral loperamid or cholestyramine (10,27). Finally, the chronic metabolic acidosis associated with urinary diversions has been demonstrated to result in bone demineralization (28-30).

Irrelevant And Relevant Antigens

Using the T15 myeloma protein as a reagent, PC antigens have been found on a variety of species of bacteria and fungi and even many allergens (Baldo etal., 1979). Brown and Crandall (1976) discovered it on the parasite Ascaris suum, and others have since found on many nematode species (Lochnit et al., 2000). T15 also reacts with the antigenic determinant, LDL (so called bad cholesterol) in atherosclerotic lesions and apoptotic cells (Binder et al., 2005 Shaw etal., 2003).

The Metabolic Syndrome

And in women 35 inches ( 88 cm)) Elevated triglycerides (a 150 mg dL) Low HDL cholesterol (men 40 mg dL and women 50 mg dL) High blood pressure (a 130 85 mmHg) Impaired fasting glucose (a 110 mg dL) syndrome occur together with great frequency. Several definitions of the metabolic syndrome exist including ones from the NCEP ATP III, the WHO, and the International Diabetes Federation. In general, most definitions endorse the following basic criteria a measure of abdominal adiposity, hypertriglyceridemia, low HDL cholesterol levels, hypertension, and evidence of impaired glucose metabolism. The NCEP ATP III defines the metabolic syndrome as any three of the following elevated triglycerides (a 150 mg dL), low HDL cholesterol (men 102 cm, and women 35 inches, or 88 cm) (Table 7.5)33. The prevalence of the metabolic syndrome has steadily increased especially among middle-aged adults in the US, in part because of increasing clinician comfort with diagnosis, but also secondary to increasing...

Epidemiological Studies

Recently, the South Bay Heart Watch (Torrance, CA) reported a study ofl,196 asymptomatic subjects with coronary risk factors who were assessed for alcohol consumption history and for the presence of calcium deposits in coronary atherosclerotic lesions as measured by electron beam computed tomography (EBCT). Participants were followed prospectively for 41 months for coronary events, defined as the occurrence of myocardial infarction or CHD death 6 , Subjects who drank alcohol had a relative risk of 0.3 ofhaving a coronary event compared with abstainers. The diminished risk of myocardial infarction or CHD death associated with moderate alcohol consumption was independent of serum HDL cholesterol levels, EBCT coronary calcium scores, and all other coronary risk factors. Abstention from alcohol in this study was as strong a predictor of coronary events as diabetes, smoking, hypertension, and coronary calcification 6 , Also reported recently was an analysis of the relationship between...

In the cardiovascular system

Much evidence has accumulated from various lines of inquiry that indicates that the dietary fatty acid intake and lipid acyl composition of tissues is a determinant of many of the chronic diseases prominent in the Western World, notably cardiovascular disease. It has been appreciated since the 1950s that when dietary polyunsaturated fat intake is increased, a decrease in the total serum and lipoprotein cholesterol levels results 1 . Bang and Dyerberg, in their study of the Greenland Eskimos, a group in which CVD had an extremely low incidence, made the ground breaking inference that the high dietary intake of the long chain polyunsaturated fatty acids, eicosapentanoate and docosahexaenoate was responsible for this protection from disease 2 , More recently, several epidemiological studies have reported a relationship between dietary n-3 polyunsaturates and the risk of CVD 3-8 , For example, Dolechek et al. found an inverse relationship between alpha-linolenate and mortality from CVD,...

Clinical Box 32 Inhibitors of Cholesterol Biosynthesis

It is estimated that approximately 30 of the population in the United States has circulating cholesterol levels that exceed desirable levels ( 200 mg dL) (American Heart Association). Elevated cholesterol levels are a major indicator for the development of coronary artery disease and a number of factors contribute to the high prevalence of excess circulating cholesterol, including genetic disposition and lifestyle issues. While familial hypercholes-terolemia is one of the most common genetic diseases in the United States (prevalence between 1 500 and 1 700), it accounts for only a small fraction of patients with elevated cholesterol. Changes in diet and exercise among patients diagnosed with elevated cholesterol levels can lead to a reduction in circulating cholesterol levels for about 10 of the population. These simple changes work because circulating cholesterol levels arise from two distinct sources from our diet and direct synthesis by the body. If we take in less cholesterol in...

The Coeffect Of Alcohol And Tobacco Smoking

Numerous studies have indicated a correlation between ethanol intake and cigarette smoking in heavy drinkers 30 , On a pharmacological basis, an ethanol-induced potentiation of nicotinic currents may enhance the acute positive reinforcement associated with nicotine, increasing tobacco use during heavy ethanol intake. Ethanol may enhance acute nicotine-mediated receptor activation. Moreover, the opposing effect of ethanol on nicotine-induced desensitization could account for the increased tobacco use observed with excessive drinking. The dose relationship between the combined use of these two social habits and the changes in serum lipids, including high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C) and triglycerides, has been investigated 31 . Both social habits raised serum cholesterol levels in a dose-related manner the more cigarettes a subject smokes and the more alcohol consumed, the higher the total serum cholesterol 31 ,

The Role Of Lifestyle

Lower risk of all cause and cardiovascular mortality seen in wine drinkers in this and other studies is a consequence of the multiple healthier lifestyle characteristics and higher socio-economic status in wine drinkers resulting in lower fatality, rather than the result of a specific benefit of wine. HDL-cholesterol cannot explain the lower absolute risk of wine drinking compared to other types of alcohol drinkers as the dose-response relationship between alcohol intake and HDL-cholesterol was similar in male beer, spirit and wine drinkers 27 and wine drinkers showed identical levels of HDL-cholesterol to non-wine drinkers (Table 3.2).

Cigarette Smoking And The Risk Of Stroke

Heavy smoking ( 20 cigarettes day) increases both the incidence 37-41 and mortality from stroke 40,41 , Cigarette smoking is a major modifiable risk factor for subarachnoid hemorrhage 42-48 , In contrast, evidence concerning the role of tobacco in the risk of intracerebral hemorrhage is still controversial, yet it appears that heavy, but not light-to-moderate cigarette smoking, increases the risk 9,38,49,50 , Smoking is dose-dependantly associated with the risk of ischemic stroke 38,46 , Cessation of smoking reduces stroke risk 37,39 , with major reduction within 2-5 years after cessation 37,39,46 , indicating that part of the effects of smoking is reversible. The risk of stroke seems to return to the level of never-smokers in light smokers, but heavy smokers seem to retain an increased risk even though also they benefit from cessation 37 , There are several mechanisms by which smoking may cause stroke. Cigarette smoking causes an immediate, yet reversible increases in blood pressure...

Exercise and weight loss

HDL cholesterol (mg dL) Total HDL cholesterol ratio LDL HDL cholesterol ratio Triglycerides (mg dL) BMI, body mass index (calculated as weight in kilograms divided by the square of height in meters) BP, blood pressure HDL, high-density lipoprotein LDL, low-density lipoproteins mo, months. SI conversions to convert glucose to mmol L, multiply by 0.0555 HDL, LDL, and total cholesterol to mmol L, multiply by 0.0259 insulin to pmol L, multiply by 6.945 and triglycerides to mmol L, multiply by 0.0113. *For Atkins group, the actual numbers of records available were 31 at 2 months, 22 at 6 months, and 21 at 12 months for Zone group, 33 at 2 months, 26 at 6 months, and 26 at 12 months for Weight Watchers group, 33 at 2 months, 30 at 6 months, and 26 at 12 months for Ornish group, 29 at 2 months, 21 at 6 months, and 20 at 12 months. BMI, body mass index (calculated as weight in kilograms divided by the square of height in meters) BP, blood pressure HDL, high-density lipoprotein LDL,...

Should The Study Be Performed

We should always hesitate to undertake extensive trials when a surgical procedure is still in the experimental stages, or when the cross-effects with other commonly used drugs are not well understood. A cholesterol-lowering agent might well interfere with a beta blocker, for example.

Introduction And Notation

In many clinical trials, there are several endpoints of comparable importance, rather than one primary endpoint. In cholesterol-lowering trials, for example, we may be interested in LDL and HDL or LDL and the ratio of total cholesterol to HDL and tryglycerides. In patients with coronary heart disease, we may be interested in both resting and exercise ejection fractions. In blood pressure lowering trials, we might be interested in diastolic and systolic blood pressure or mean arterial pressure and pulse pressure. In stroke treatment there are a number of scales used to measure recovery and no one scale is believed to assess all dimensions. We later will consider an example using four of these scales, the Barthel Index, NIH Stroke scale, Glasgow Outcome score, and the modified Rankin score. In lung diseases, we may be interested in several lung function tests such as FEV1, FVC, PI. In behavioral studies, we may be interested in several scales for quality of life. Recent advances in DNA...

Structural Models For Binary Responses 31 Null versus Full Compliance

Table 2 summarizes the information in Figure 1 by dichotomizing cholesterol reduction using 20 units as the cutpoint, and by retaining the null versus full compliance, with 60 as the cutpoint for the percentage of the prescribed dose actually taken. Note that the placebo compliance rate in the placebo arms is 126 172 73 , which is considerably larger than the treatment compliance rate in the treated arm, which is 88 165 53 . The possibility of nonrandom noncompliance is apparent. Table 3 summarizes the structure of the observed data that will be used for assessing efficacy. Table 2 Cross-Classification of Cholesterol Reduction (Y 1 if at least 20 units Y 0 otherwise), Treatment Arm Assignment (R 1 for treated arm R 0 for control arm) and Compliance (60 ) Table 2 Cross-Classification of Cholesterol Reduction (Y 1 if at least 20 units Y 0 otherwise), Treatment Arm Assignment (R 1 for treated arm R 0 for control arm) and Compliance (60 )

Apolipoproteins CII and CIII

Apolipoproteins C-II and C-III both play a major role in VLDL metabolism. Apolipoprotein C-II and C-III stimulate and inhibit, respectively, lipoprotein lipase, the enzyme responsible for hydrolyzing the triglycerides in VLDL. In one study comparing apolipoprotein E levels among low (50 g day) and alcoholic ( 100 g day) drinkers showed a significant increase in serum apolipoprotein C-III levels with increasing alcohol consumption 43 , Incubating human hepatoma cells with alcohol with concentrations up to 50 mM had no effect on apolipoprotein C-II or apolipoprotein C-III secretion 43 ,

Long Term Health Consequences of PCOS

Insulin resistance is associated with diabetes, hypertension, dyslipidemia, endothelial dysfunction, a procoagulant state, and cardiovascular disease (see Chapters 28 and 29). Recently, the National Cholesterol Education Program Adult Treatment Panel defined the metabolic syndrome as the presence of three of the five following risk factors waist circumference greater than 88 cm in females fasting serum glucose 110 mg dL or more, fasting serum triglycerides greater than 150 mg dL serum high-density lipoprotein cholesterol less than 50 mg dL and blood pressure greater than 130 85 mmHg (60). The metabolic syndrome has been found to be present in 43-46 of women with PCOS, a twofold higher prevalence compared with women in the general population of the same age (61,62).

Benefits of Enteral Nutrition

Several specialized enteral formulas are now available to meet the needs of a variety of patients. Different formulas contain varying degrees of protein, carbohydrate, and fat, depending on the patient's underlying disease process and requirements. Standard formulas contain 50 to 55 carbohydrates, 15 to 20 protein, and 30 fat, the caloric density is 1 kcal mL, and the osmolality is close to isotonic (between 280 and 350 mOsm L). Carbohydrates are in the form of oligosacchrides and polysaccharides. Most of enteral formulas do not contain lactose, avoiding the most common disaccharidase deficiency. Proteins are derived from whey, meat, soy isolates, and various caseinates. Fats are usually supplied by vegetable oils and medium chain triglycerides. Numerous other lipids such as fish oils, borage oil, and structured lipids may be substituted. Fiber is added to some formulas for avoidance of diarrhea. Elemental diets and semi-elemental small pep-tide formulas maybe useful in selected...

Dietary Lipids And Fatty Acid Patterns

Dietary lipid intake is primarily in the form of triacylglycerols (triglycerides), with one molecule of glycerol bound to three fatty acids. Dietary fatty acids vary in chain length (typically even numbered, 4-22 carbon atoms in length) and the degree of saturation, which is relevant to biological functions in vivo. Most fatty acids are in a cis configuration in nature, but current food industry techniques, involving the hydrogenation of polyunsaturated vegetable oils for the preparation of variably saturated fats, results in a significant intake of trans fatty acids. Hydrogenated fats are used in cooking and table fats, and as an ingredient in many manufactured foods. The effects of trans fatty acids on metabolism and disease processes remains very controversial. The only specific dietary requirement for lipids in the diet is for essential fatty acids, linoleic acid (18 2) and a-linolenic acid (18 3), which cannot be synthesized by humans.

Climacteric and Menopause

With age, the ovaries have fewer remaining follicles and those that remain are less responsive to gonadotropins. Consequently, they secrete less estrogen and progesterone. Without these steroids, the uterus, vagina, and breasts atrophy. Intercourse may become uncomfortable, and vaginal infections more common, as the vagina becomes thinner, less distensible, and drier. The skin becomes thinner, cholesterol levels rise (increasing the risk of cardiovascular disease), and bone mass declines (increasing the risk of osteoporosis). Blood vessels constrict and dilate in response to shifting hormone balances, and the sudden dilation of cutaneous arteries may cause hot flashes a spreading sense of heat from the abdomen to the thorax, neck, and face. Hot flashes may occur several times a day, sometimes accompanied by headaches resulting from the sudden vasodilation of arteries in the head. In some people, the changing hormonal profile also causes mood changes. Many physicians prescribe hormone...

ApoE4 A case of evolutionary underperformance

Anorectal Malformation Pathophysiology

These multiple screenings led to the identification of several potent apoE-inducing agents. Among the most interesting candidates are 1) indomethacin (Aleong et al. 2003), a potent anti-inflammatory drug used in the past with some success in a placebo-controlled clinical drug trial in mild to moderate AD (Rogers et al. 1993), 2) estrogen (a problematic hormone used recently with disappointing results in elderly women Craig et al. 2005) and 3) cholesterol-lowering drug called probucol (Champagne et al. 2003), the first generation of cholesterol- lowering agents that were used mostly in severe familial hypercholesterolemia (Davignon et al. 1982). We also identified two apoE-reducing agents, 1) cortisol a glucocorticoid hormone associated with stress, known to inhibit synaptogenesis at physiological concentration in vivo and to be markedly up-regulated in MCI subjects (Lupien et al. 1998) , and 2) simvastatin a second-generation cholesterol-lowering drug that can inhibit apoE secretion...

Postvagotomy Diarrhea Syndrome

Vagal innervation is an important factor in the control of pancreaticobiliary secretion and intestinal absorption. Truncal vagotomy may result in excessive small bowel secretions or bile acids with resulting diarrhea. Diarrhea occurs in up to 25 of patients following a complete (truncal) vagotomy with gastric drainage or resection (17). Less than 2 of patients have incapacitating symptoms. The syndrome is characterized by frequent watery stools, usually unrelated to meals, and occurring at night. Medical therapy includes dietary alterations with low fluid content, frequent feedings, increasing dietary fiber, and adding substances such as pectin to slow intestinal transit. Medications include cholestyramine, which may help bind bile salts, and somatostatin, which is effective in some patients. Surgical therapy is rarely recommended, but when needed, consists of interposition of a 10 cm antiperistaltic jejunal limb 100 cm distal to the ligament of Treitz (18).

Lipid Lowering Therapy

Kertai et al. assessed the potential long-term beneficial effects of statin use after successful abdominal aortic surgery and demonstrated that long-term statin use is associated with reduced all-cause and cardiovascular mortality irrespective of clinical risk factors and beta-blocker use7. After adjusting for clinical risk factors and beta-blocker use, the association between statin use and reduced all-cause (hazard ratio HR 0.4 95 , confidence interval CI 0.3 to 0.6 p 0.001) and cardiovascular (HR 0.3 95 CI 0.2 to 0.6 p 0.001) mortality was robust and highly significant7. Mechanistically, statins can directly modulate the biology of the aorta and suppress MMP-9 production in the aortic wall by inhibiting the activation of neutrophils and macrophages. It is probable that such therapy can be useful for the prevention or treatment of aortic aneurysms8. At this point in time, it is reasonable to optimally control lipid levels with statins in patients with aortic aneurysms and...

Embryonic endothelial progenitor cells

Synthesis Cholesterol Vivo

This therapeutic strategy of EPC mobilization has been implicated not only by natural hematopoietic or angiogenic stimulants, but also by recombinant pharmaceuticals. Statins, the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors, inhibit the activity of HMG-CoA reductase, which catalyzes the synthesis of mevalonate, a rate-limiting step in cholesterol biosynthesis. The statins rapidly activate Akt signaling in ECs, and this stimulates EC bioactivity in vitro and enhances angiogenesis in vivo (46). Our group and Dimmeler et al. demonstrated a novel function for HMG-CoA reductase inhibitors that contributes to postnatal neovascularization by augmented mobilization of bone marrow-derived EPCs through stimulation of the Akt signaling pathway (47-49). Regarding its pharmacological safety and the effectiveness on hypercholesterolemia, one of the risk factors for atherogenesis, the statin might be a potent medication against atherosclerotic vascular diseases.

Principles of Fat Digestion in Broilers

Digestion and absorption of fat in poultry was extensively reviewed by Krogdahl (1985). Briefly, the initiation of fat digestion seems to start with a possible onset of fat emulsification in the upper digestive tract but mainly with the entrance of digesta into the duodenum, where it is mixed with the secretions of the exocrine pancreas and gall bladder, which contain lipase, co-lipase and conjugated bile salts, respectively. Bile salts and phospholipids facilitate progressive fat emulsification. Binding of co-lipase at the surface of these relatively large aggregates is the precondition for the action of the lipase that hydrolyses the triglycerides at the 1 and 3 positions of the glycerol molecule. Released fatty acids, the remaining 2-monoglycerides, phospholipids and bile salts form spontaneously into mixed micelles, which are much smaller in diameter than the emulsified fat droplets. Micelles are able to solubilize non-polar lipid compounds such as fat-soluble vitamins or...

Susceptibility To Ischemic Heart Disease

In a recent case-control study on ischemic heart disease in arseniasis-hyperendemic villages (Hsueh et al., 1998), serum samples of 74 patients and 193 matched healthy controls were tested for serum levels of micronutrients by HPLC. A significant reverse dose-response relationship with arsenic-induced ischemic heart disease was observed for serum levels of a- and P-carotene, but not for serum levels of retinal, lycopene and a-tocopherol. The odds ratio of developing ischemic heart disease for those with a serum a- and P-carotene level 8.7 Mg dl and a duration of consuming artesian well water 13 years was around five-fold, compared with those that had a serum a- and P-carotene level 8.7 Mg dl and a duration of consuming artesian well water

Alkaline reflux gastritis syndrome

No specific medical therapy is available for alkaline reflux gastritis. Prokinetic agents, proton pump inhibitors, H2 antagonists, and cholestyramine all have inconsistent results. Roux-en-Y biliary diversion is the treatment of choice. Vagotomy, if not performed earlier, is done to prevent marginal ulceration. Some surgeons recommend adding subtotal gastrectomy to speed gastric emptying. Jejunal interposition between the gastric remnant and the duodenum has also been successfully used to treat this condition.

Prospects for the Future

Bradley Hyman

Strategies are being developed to ameliorate the neuro-toxicity caused by abnormal metabolic products and prevent processes that lead to cell death. A large number of clinical trials are underway, both industry and government (NIA-ADCS) sponsored studies, with widely-used drugs (e.g., antioxidants, anti-inflammatory agents, statins, vitamins and folate) that might reduce the risk ofAlzheimer's disease. Intensive studies are underway on multiple fronts, from basic science to genetics to drug therapy to care giving.

Carotid Atherosclerosis Arterial Stiffness and Stroke Events

Assessment of intima-media thickness or of measures of large arteries compliance may identify patients at increased risk for stroke. In fact, carotid atherosclerosis and arterial stiffness are both related to risk factors associated with the occurrence of stroke. In addition, several cross-sectional studies have shown that risk factors associated with the occurrence of stroke have been correlated with carotid atherosclerosis development and progression and with increased arterial stiffness. Some studies have also shown that aortic stiffness is associated with the extent of atherosclerosis in the carotid and in other vascular beds. More importantly, longitudinal studies have demonstrated that carotid atherosclerosis and arterial stiffness are independent predictors of stroke (and other cardiovascular events). Interventional studies have demonstrated that treatment with statins, calcium antagonists, ACE inhibitors, and insulin sensitizers may be particularly effective on slowing the...

Advanced revascularization strategies and angiogenesis

Angiogenesis Strategy

Our group investigated the effect of endothelial dysfunction secondary to hypercholesterolemia on therapeutic angiogenesis. In a pig model of chronic myocardial ischemia, animals were fed either a high-cholesterol or a normal diet. Four weeks after placement of an ameroid constrictor on the left coronary circumflex artery, FGF-2 loaded in heparin alginate beads for slow release was implanted in the circumflex territory. The hypercholesterolemic group showed significant endothelial dysfunction and impaired angiogenesis manifest as decreased circumflex perfusion compared to the control, normal diet group. FGF receptor-1 expression was upregulated in the control group, but decreased in the hypercholesterolemic animals (54). Decreased production of growth factors may contribute to a lack of compensatory neovascularization in some patients with ischemic cardiovascular disease.

Effects on Digestive Secretions

Area Postrema Rat

Complex carbohydrates, proteins, and triglycerides, comprising the three major food groups, are each formed in condensation (water-forming) reactions. Digestion of these foods into absorbable moieties (e.g., monosac-carides, amino acids, and fatty acids) essentially involves the reversal of this process, hydrolysis (Guyton and Hall, 1996b). Gastric acid participates in this action, especially with respect to protein and triglyceride digestion, and may therefore be regarded as a contributor to the aggregate rate of nutrient uptake (Alpers, 1994).

Intrahepatic Cholestasis of Pregnancy

Diagnosis and, when given before delivery, can minimize postpartum hemorrhage. Treating pruritus is more problematic. Antihistamines and benzodiazepines have been used with little success. Studies using phenobarbitol have been contradictory and it may cause neonatal respiratory depression. Dexamethasone (12 mg d for 7 days with 3 day taper) has been shown to improve pruritus. Controlled trials have not been done, however, and there is a report of worsened liver function with dexamethasone use. Studies with S-adenosyl-methionine have shown conflicting results. In two randomized controlled trials, it significantly decreased pruritus (800 mg d intravenously or 1,600 mg d orally). In a third double blind randomized controlled trial, no improvement was seen. Pruritus has been successfully treated with cholestyramine at 8 to 16 g per day, although it is usually poorly tolerated. It must be used with caution as it may worsen maternal absorption of Vitamin K and maternal steatorrhea.

Impaired Glucose Tolerance Impaired Fasting Glucose Insulin Resistance And Diabetes

Ferriman Galwey Score

Figure 7.16 The relationship between cardiovascular event rates and LDL cholesterol levels during statin therapy in major secondary prevention trials. HPS, Health Protection Study CARE, Cholesterol And Recurrent Events LIPID, Long-term Intervention with Pravastatin in Ischemic Disease 4S, Scandinavian Simvastatin Survival Study TNT, Treating to New Targets. Adapted and updated from reference 54, with permission Figure 7.17 Hazard ratios for the incidence of cardiovascular disease associated with prehypertension and abnormalities of glucose metabolism. Hazard ratios were compared with the group of normal glucose tolerance and normal blood pressure and adjusted for age, gender, body mass index, waist circumference, low- and high-density lipoprotein cholesterol levels, triglycerides, physical activity, smoking, and alcohol use. NGT, normal glucose tolerance IGT, impaired glucose tolerance IFG, impaired fasting glucose DM, diabetes mellitus. From reference 16, with permission Figure 7.17...

Fats and Phospholipids

Fats and oils are fatty acid triesters of the 3-carbon molecule glycerol and are often known as triglycerides or just glycerides. The formation and structure of a triglyceride is outlined in Fig. 1.15. Hexanoate, octanoate, and decanoate (6, 8, and 10 carbon atoms, respectively) are all saturated fatty acids (no intrachain double bonds) and the resultant triglyceride is known as a saturated triglyceride. Figure 1.16 illustrates the structure of a triglyceride constructed from unsaturated forms of hexanoate, octanoate, and decanoate, each containing one double bond. Fats found in animals often contain such unsaturated carbon-carbon bonds, and in these cases the hydrocarbon chains on either side of the double bond are in the cis arrangement as shown in Fig. 1.16. As a result a bend or kink is introduced into the otherwise linear hydrocarbon chain. This reduces the ability of the molecule to pack tightly with contiguous triglycerides. In general, the greater the amount of unsaturation...

Classification and evolution of increased cardiometabolic risk states

Prevalence Metabolic Obesity

Dyslipidemia high triglycerides, low HDL, small dense LDL* Figure 1.2 The current perspective on the relationship between metabolic syndrome and coronary heart disease. The presence of obesity in an individual is highly associated with the development of insulin resistance and hyperinsulinemia. Many traditional risk factors for CVD are related to the development of metabolic syndrome and these include glucose abnormalities, dyslipid-emia and hemodynamic factors. However, novel risk factors such as abnormalities in inflammatory markers, i.e. C-reactive protein (CRP) and coagulopathy (plasminogen activator inhibitor-1 (PAI-1)) also appear to play a role. BMI, body mass index HDL-C, high-density lipoprotein cholesterol LDL, low-density lipoprotein PHLA, postheparin lipolytic activity PP, postprandial SNS, sympathetic nervous system TG, triglycerides. These factors are highly related to the development of coronary heart disease. From reference 17, with permission on insulin resistance as...

Organ And Tissue Indicators Composition of Blood

Blood plasma proteins are central to several vital blood activities, including haemostasis and blood coagulation, vitamin and hormone transport, and specific immunity to pathogens. Plasma also contains significant amounts of active and inactive enzymes. Low total plasma protein is a first line indicator of a general problem, but it cannot be effectively interpreted without further analysis. Total plasma triglyceride and cholesterol levels may provide an indirect measure of the availability of these nutrient reserves however, post-prandial changes in the delivery of these nutrients to the blood may confound interpretation. This may be particularly problematic in field studies, when the time of feeding is not known.

Peg Vs Radiological Or Surgical Gastrostomy

Through the PEG tube following delivery of medications and enteral feedings should be reinforced to both the patient and the caregivers. Bulking agents such as psyllium and certain resins such as cholestyramine should never be given through the PEG (13). In occasions when tube occlusion does occur, flushing the tube with a 60-cm3 syringe is recommended. Warm water is the best irrigant, and is superior to other liquids such as juices or colas (14). In the event this fails, a PEG tube brush can be used to clear the obstruction (13).

Adipocyte Dysfunction And Insulin Resistance

Our understanding of fat and carbohydrate metabolism and their interaction. In particular, a large body of evidence has accumulated suggesting that PPARy is a master regulator in the formation of fat cells and their ability to function normally in the adult21,22. PPARy is induced during adipocyte differentiation and ectopic expression of PPARy in non-adipogenic cells effectively converts them into mature adipocytes23,24. Thus, the discovery and study of the PPARs have contributed greatly to the evidence supporting the role of the adipocyte as having a major effect on skeletal muscle glucose uptake. First, there is evidence that activation of PPARy in adipose tissue improves its ability to store lipids, thereby reducing 'ectopic' fat storage in liver and muscle21. If this metabolic pathway is activated, lipid repartitioning on a whole-body level will occur increasing the triglyceride content of adipose tissue, lowering free fatty acids and triglycerides in the circulation, liver and...

Causes Of Parenchymatous Acute Renal Failure

Primary oxalosis, sulfadiazine, fluoride anesthesics Organic pigments (endogenous nephrotoxins) Myoglobin rhabdomyolisis muscle trauma infections dermatopolymyositis metabolic alterations hyperosmolar coma diabetic ketoacidosis severe hypokalemia hyper- or hyponatremia hypophosphatemia severe hypothy-roidism malignant hyperthermia toxins such as ethylene glycol, carbon monoxide, mercurial chloride, stings drugs such as fibrates, statins, opioids and amphetamines hereditary diseases such as muscular dystrophy, metabolopathies, McArdle disease and carnitine deficit Hemoglobinuria malaria mechanical destruction of erythrocytes with extracorporeal circulation or metallic prosthesis, transfusion reactions, or other hemolysis heat stroke burns glucose-6-phosphate dehydrogenase nocturnal paroxystic hemoglobinuria chemicals such as aniline, quinine, glycerol, benzene, phenol, hydralazine insect venoms

Hiv Protease Inhibitors

Fat distribution abnormalities result in a wasting appearance ( slim disease ) and abnormal fat accumulation in localized areas ( protease pouch, buffalo hump, and crix belly ) (205-220). Some studies have shown that saquinavir, ritonavir, and nelfinavir all reduce the development of fat cells from stem cells in vitro. In addition, they increase the metabolic destruction of fat in existing fat cells. It is postulated that loss of deposited fat in the body could lead to high levels of LDL, cholesterol, and triglycerides. An alternative mechanism could involve retinoids (221). When retinoids are combined with PIs, complex reactions occur in certain genes. It is postulated that indinavir may cause some effects resembling lipodystrophy by changing retinoid signaling. Therefore, patients taking PIs may be advised to avoid vitamin A supplements. Still another hypothesis suggests that PIs, which show approximately 60 homology with lipoprotein receptor-related protein...

Evaluation of Ascites

Milky, AF triglycerides 200 mg dL Culturing ascitic fluid as if it were blood gives the highest yield. Bedside inoculation of 10 to 20 mL of ascitic fluid into each of 2 culture bottles has become the standard technique, with a detection rate of over 90 . Additional testing on the ascitic fluid includes glucose, lactate dehydrogenase, amylase, triglycerides, bilirubin, and cytology. Ascitic fluid and serum levels of cancer antigen 125 are almost invariably elevated in patients with cirrhosis and ascites and should not be used as surveillance markers for peritoneal carcinomatosis.

Atherogenic Dyslipidemia

Insulin Nursing

The high triglyceride low HDL cholesterol lipid profile commonly observed in insulin resistant subjects. Hypertriglyceridemia is a strong predictor of coronary heart disease. Prospective studies such as MR FIT study show that the adjusted risk of a fatal or non-fatal CHD event is greater in subjects with a triglyceride (TG) level of a 200mg dL (Figure 5.17)22.This is irrespective of whether the subjects were in a fasting or non fasting state. The Whitehall II study showed that the potential relevance of combining TG and cholesterol in risk prediction (Figure 5.18)23. There is also an inverse relationship between serum levels of HDL cholesterol and triglycerides, with low serum HDL cholesterol levels representing an independent risk factor for cardiovascular disease and the so-called 'atherogenic lipid triad' consists of high serum triglyceride levels, low serum HDL cholesterol levels, and a preponderance of small, dense, low-density lipoprotein (LDL) cholesterol particles. Small,...

The Effect Modification Of Alcohol By Smoking

There are only two epidemiologic studies on the effect modification of alcohol by smoking and neither of them examines it in relation to the risk of stroke. In a Japanese cohort of 19,231 men, alcohol consumption and all-cause mortality had a J-shaped association in nonsmokers but not in smokers 78 , In a cross-sectional study of 5,312 German men and women, the rise in blood pressure associated with drinking was higher in smokers than in nonsmokers 79 , Some studies have instead examined the effect modification of smoking by alcohol. In a cohort of 22,071 US male physicians, alcohol attenuated the linear effect of smoking on the risk of total stroke 38 , In a Japanese cohort of 1,775 men, a dose-dependent decrease in diastolic blood pressure and serum HDL cholesterol by increasing cigarette smoking was evident in nondrinkers but not in drinkers The effects of both alcohol and tobacco are manifold, which makes them complicated to examine and understand. The effects may be additive or...

Modern Research on Chinese Medicinal Herbs

Herbal drugs are developed, certified, and licensed. For example, Radix Bu-pleuri (Chai Hu) was found to have the function of reducing Heat. A new extract from the herb, Radix Bupleuri injection, was approved and has been widely used to reduce fever. Another herb, Gynostema pentaphyllum ( Jiao Gu Lian), was found to reduce cholesterol. A new Gynostema pentaphyllum pill was then developed and has been used in China widely. Herba Leonuri (Yi Mu Cao) has the function of promoting blood circulation to regulate menstruation. The new drug Herba Leonuri Infusion is now widely used in gynecology for irregular menstruation.

What is Evista raloxifene What is a SERM and why is it effective in the treatment of osteoporosis

Evista increases bone mineral density, decreases the risk of fractures, and is FDA-approved for the prevention and treatment of osteoporosis in post-menopausal women. The dosage of Evista for both osteoporosis treatment and prevention is 60 mg per day taken as one tablet. Evista, unlike the bisphos-phonates, may be taken with or without food. In addition to Evista's positive effects on bone, it also decreases low-density lipoprotein (LDL) cholesterol (the bad cholesterol) as well as total cholesterol, but may actually increase triglyceride levels and therefore should be used with caution in women with preexisting high triglycerides. In one three-year study, the incidence of breast cancer was also decreased. Evista is currently being investigated as a way of preventing breast cancer, particularly among women with a family history of breast cancer. Evista's positive effects on bone do not last. Once treatment is stopped, bone loss will resume. Lowers LDL ( bad cholesterol) levels and...

Example The Catch Trial

The CATCH calculations assumed 3-4 classrooms per school (3.5 on average) and 17 students with available data per class. On the basis of past studies the standard deviation r was estimated to be 28 mg dl. The correlations p1 and p2 were estimated on the basis of a variance components analysis of a small data set on cholesterol levels among schoolchildren in a prior observational study conducted by one of the study centers in CATCH. The estimates were p1 0.023 and p2 0.003. The projected treatment difference on cholesterol (S and S + Fversus C) was determined to be 5.1 mg dl. A conservative adjustment factor was incorporated to account for possible missing data bias see Zucker et al. (1995) for details. The effect of the adjustment was to reduce the difference d to be detected The serum cholesterol results were analyzed using a mixed linear model of the form (3), with experimental arm, CATCH center, baseline cholesterol level, and a number of relevant covariates as fixed effect terms...

Therapeutic Targets and Acne Drugs

Bacterial hypercolonization is not involved at the onset of acne, but it plays a role in the maintenance of the disease 2, 3, 8 . Propionibacterium acnes (P. acnes), an anaerobic bacterium, is a normal constituent of the cutaneous flora however, it is virtually absent in the skin before puberty. Sebaceous follicles turning to microcome-dones provide an anaerobic, lipid-rich environment for optimum bacterial proliferation. P. acnes produces li-pases which can split triglycerides into free fatty acids. The latter can irritate the follicular cells and may cause hyperproliferation and or inflammation. Topical or systemic antibiotics administered successfully in acne patients exhibit a suppressive effect on P. acnes proliferation but also directly suppress inflammation by decreasing neutrophil chemotaxis and down-regulating the expression of pro-inflammatory mediators and the production of chemotactic factors 34 . The unique environment of the pilosebaceous follicle makes lipophilic...

Null Partial and Full Compliance

In Table 6 the cholestyramine data is presented with dichotomized response and the compliance in three categories defined by the cutpoints 20 and 60 for percentage experimental and placebo dose, respectively. As before, we are not interested in the placebo compliance categories, and the structure for the observed data used for modeling is given in Table 7. Table 6 Cross-Classification of Cholesterol Reduction ( Y 1 if at least 20 units Y 0 otherwise), Treatment Arm Assignment (R 1 for treated arm R 0 for control arm) and Ordered Compliance (60 ) Table 6 Cross-Classification of Cholesterol Reduction ( Y 1 if at least 20 units Y 0 otherwise), Treatment Arm Assignment (R 1 for treated arm R 0 for control arm) and Ordered Compliance (60 )

Magic bullets shotguns or cocktails to treat or prevent Alzheimers disease

For the most part, the single target approach to drug discovery has failed to identify magic bullets that significantly impact the clinical manifestations of CNS diseases (Roth et al. 2004). Even when a magic bullet that is purportedly selective for a single target proves efficacious in a certain disease setting, in time, a more complete understanding of its pharmacology often shows that efficacy can be attributable to 1) interaction with several molecular targets or 2) a more complex physiologic effect than was originally intended. For example, it is now clear that selective drugs targeting G-protein coupled receptors (GPCRs) are, for the most part, not nearly as selective as previously thought they bind with high affinity to a number of GPCRs (Roth et al. 2004). In addition, there is growing evidence that the beneficial effect of HMGCoA reductase inhibitors (statins) is not completely attributed to its cholesterol lowering effects and may be enhanced by effects on isoprenoid levels...

Pharmacology of the coronary microcirculation

3-Hydroxy-3methylglutaryl (HMG)-coenzyme A reductase inhibitors (or statins) also exert direct beneficial effects on the endothelium, in part through an increase in NO production (170). They can promote angiogenesis independently of direct changes in eNOS expression, but rather by stabilization of eNOS mRNA (171), and modulation of hsp90 and caveolin abundance, contributing to eNOS availability and functionality to potentiate the NO-dependent, protein kinase AKT-activated angiogenic process (172,173). Although these pro-angiogenic properties can be observed at low doses, statins could paradoxically exert anti-angiogenic effects at high dose (174), in association with decreased endothelial release of VEGF, increased endothelial apoptosis (175), and of Rho A geranylgeranylation and membrane localization (176).

Tests of Hepatic Function

Lipid and lipoprotein synthesis occurs in the liver, and levels of various lipid molecules change with both acute and chronic liver disease. For example, in cholestatic forms of liver disease, cholesterol levels rise, whereas in acute liver injury, plasma triglycerides are often elevated. In advanced liver disease, cholesterol levels are frequently low. Unfortunately, because of individual differences in these lipid values, as well as their dependence on nutritional status, there is no reliable way to use them to assess hepatic function.

Human and nonhuman primate studies

Apolipoprotein A-I is the most abundant protein in HDL and plays an important role in maintaining the structure of HDL and activating lecithin cholesterol acyltransferase (LCAT), an enzyme involved in converting cholesterol to cholesterol ester. HDL appears to be primarily cardioprotective by transporting cholesterol from the periphery to the liver for export as bile acids. This process is termed reverse cholesterol transport. From epidemiological studies, higher levels of HDL cholesterol are associated with a decrease in cardiovascular disease risk. Similar studies have shown that apolipoprotein A-I levels show a similar inverse relationship with risk for cardiovascular disease 4 , Consumption of moderate amounts of alcohol is associated with an increase in HDL cholesterol and apolipoprotein A-I. The increases occur in a dose-dependent fashion. As little asl5gof alcohol day can increase apolipoprotein A-I levels in humans 5 , Hojnacki et al. 6 examined the dose response of alcohol on...

Mechanisms Linking Stiffness and Cholesterol

Cholesterol and oxidized LDL cholesterol, in particular, have a number of direct, non-atheromatous, effects on the arterial wall, which may lead to arterial stiffening. Oxidized LDL cholesterol also leads to peroxynitrite formation and a generalized state of increased oxidative stress, both of which can damage elastin directly 37, 38 , Oxidized LDL cholesterol is also pro-inflammatory. Several groups, including our own, have recently shown an association between measures of acute inflammation, such as C-reactive protein and arterial stiffness in otherwise healthy individuals 39, 40 , Moreover, Pirro et al. recently found a significant, positive relationship between aortic pulse wave velocity and C-reactive protein in subjects with hypercholesterolaemia. Interestingly, when both C-reactive protein and HDL cholesterol were entered into a multivariate model, only C-reactive protein remained an independent predictor of aortic stiffness. Hypercholesterolaemia is strongly associated with...

Arterial Stiffness and Extracoronary Calcification

Finally, an interesting study has reported differences in arterial stiffness according to carotid plaque morphology (by B-mode ultrasound), among 561 volunteers (mean age 58 8 10.8 years) without a history of coronary heart disease or stroke 19 . 71.5 had no plaques, 9.1 had echolucent and 19.4 had echogenic plaques. PWV was higher among those with echogenic (calcified) plaques (p 0.01) compared to those with echolucent or no plaques, and mean PWV was not significantly different between those with echolucent plaques versus those with no plaques. Results remained significant after adjustment for gender, age, BMI, smoking habits, systolic BP, antihypertensive treatment, diabetes, total cholesterol, lipid-lowering medications, serum triglycerides, and CCA-intima-media thickness (IMT). These results are interesting, since they are counter-intuitive to current thinking that echolucent plaques should be more unstable and therefore more high risk than echogenic (calcified) plaques. However,...

Acute Fatty Liver of Pregnancy

AFLP has little or no association with the hormonal changes of pregnancy. Its etiology is unknown, but may stem from decreases in fetal mitochondrial fatty acid p-oxidation by the enzyme long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD). Cholestatic liver disease with microvesicular steatosis is often seen in patients with LCHAD deficiency and an association between LCHAD and AFLP has been described. In many cases, the defect appears to reside in the a-subunit of a trifunctional protein gene, which includes LCHAD activity. This may lead to poor fetal processing of triglycerides and free fatty acids, which are toxic to the maternal hepatocytes. Testing for the genetic variants of the LCHAD enzyme is available. When the deficiency is present, recurrent disease can be seen in subsequent pregnancies. Not all investigations have confirmed this specific association and other genetic variants, such as a defect in short-chain acyl-coenzyme A dehydro-genase, have been associated with AFLP.

Figure 415

Signs and symptoms of hypomagnesemia. Symptoms of hypomag-nesemia can develop when the serum magnesium (Mg) level falls below 1.2 mg dL. Mg is a critical cation in nerves and muscles and is intimately involved with potassium and calcium. Therefore, neu-romuscular symptoms predominate and are similar to those seen in hypocalcemia and hypokalemia. Electrocardiographic changes of hypomagnesemia include an increased P-R interval, increased Q-T duration, and development of U waves. Mg deficiency increases the mortality of patients with acute myocardial infarction and congestive heart failure. Mg depletion hastens atherogenesis by increasing total cholesterol and triglyceride levels and by decreasing high-density lipoprotein cholesterol levels. Hypomagnesemia also increases hypertensive tendencies and impairs insulin release, which favor atherogenesis. Low levels of Mg impair parathyroid hormone (PTH) release, block PTH action on bone, and decrease the activity of renal 1-a-hydroxylase,...

Olfactory nerve

1 Drugs include antihelmintic, local anesthetics, statins, antibiotics (amphotericin B, ampicillin, ethambutol, lincomycin, tetracyclin), cytostatics (doxorubicin, methotrexate, carmustin, vincristine), immunosuppressants (azothioprine), allopurinol, colchicine, analgesics, diuretics, muscle relaxants, opiates.


It is quite evident that dyslipidemia and hypertension frequently coexist. There is increasing recognition of a mutually facilitative interaction between dyslipidemia and RAS activation in the development of atherosclerosis. Both share many of the same properties in terms of activation of pro-inflammatory, pro-oxidant, and pro-atherosclerosis pathways. It is no wonder that the concurrent therapy of dyslipidemia with statins enhances the effects of RAS inhibitors. Although the effects of statins on regulation of determinants of vascular stiffness are not well defined, it is quite likely that these regulatory pathways will be influenced by dyslipidemia therapy, especially statins. 3 Scandinavian Simvastatin Survival Study (4S) Randomised trial of cholesterol lowering in 4,444 patients with coronary heart disease. Lancet 1994 344 1383-1389. 5 Mehta JL, Li DY, Chen HJ, Joseph J, Romeo F Inhibition of LOX-1 by statins may relate to upregulation of eNOS. Biochem Biophys Res Commun 2001 289...

Fusion Inhibitors

Fusion inhibitors are included in the general group of entry inhibitors. Entry inhibitors bind to specific proteins and prevent HIV from entering otherwise healthy cells. A diagram of this mechanism is shown in Fig. 2.2. The currently approved fusion inhibitor, enfuvirtide, appears to interact with biological membranes, based on the molecular sequence and the eventual arrangement in an alpha helix. Enfu-virtide, however, does not form the alpha helix when binding to membranes. Instead, it remains in a random-coil conformation when inserted into the membranes. Enfuviritide enters the external layer of the plasmalemma and cannot translocate due to the negatively charged lipids of the inner layer. When HIV tries to enter the cell, the virus lipidic membrane cannot remove the enfuvirtide from the outer cell surface. The high cholesterol content and the concentration of

Thomas D Koepsell

Rose (1985, 1992) has distinguished between two broad approaches to disease prevention in populations. Under a high risk strategy, risk-factor information about each individual is used to identify persons with the greatest chance of developing a preventable condition, and prevention efforts are then focused on those high-risk individuals. Under a population strategy, a preventive intervention is aimed at everyone in an attempt to produce a favorable shift in the overall risk-factor distribution in the population. Rose notes that for many diseases, the cases that occur in high-risk individuals may be only a small proportion of the total. Most fatal cases of coronary heart disease, for example, occur in people with normal cholesterol levels (Rose 1992), in whom dietary modification aimed at reducing cholesterol may lower the risk of coronary heart disease. Thus, a program aimed at both high- and low-risk individuals has the potential to prevent more cases than one aimed solely at...


Several studies have suggested a link between plasma cholesterol and blood pressure. Indeed, pooled epidemiological data suggest a significant, if relatively modest, relationship between peripheral blood pressure and plasma cholesterol 10 . Unfortunately, the majority of studies simply looked at the association between lipids and systolic or diastolic pressure, and data concerning pulse pressure, a frequently used surrogate of arterial stiffness, are lacking. Moreover, as we and others have repeatedly demonstrated, systolic and pulse pressure in the aorta differs significantly from that recorded in the brachial artery. This is important because the heart and brain 'see' aortic, not brachial pressure. Indeed, left ventricular mass and carotid artery remodelling relate more closely to central rather than brachial pressures. Therefore, simply assessing blood pressure in the brachial artery may fail to reveal potentially important differences in differences in aortic pressure or...

Figure 1312

Hypercholesterolemia and hypertriglyc-eridemia. Hypercholesterolemia and hyper-triglyceridemia are common after kidney transplantation. Approximately two thirds of transplant recipients have low density lipoprotein (LDL) or total cholesterol levels signifying increased cardiac risk 29 have elevated triglyceride levels 2 years after transplantation (Kasiske, Unpublished data). Not only is hyperlipidemia a clear risk factor for coronary disease (see Figs. 13-13 and 13-14), but it may also contribute to the progressive graft dysfunction associated with chronic rejection 21,22 . HDL high density lipoprotein. (From Bristol-Myers Squibb 23 with permission.)


We evaluated the effect of AM on neointimal hyperplasia and atherosclerosis using AMTG (Imai et al., 2002). We used cuff-injury model, in which a polyethylene tube cuff was placed around the femoral artery for 4 weeks. The area of neointima was significantly smaller in AMTG mice than in wild littermates (intima media area ratio AMTG 0.45+-0.14 vs WT 1.31+-0.41 p

Preventive Therapy

Hypercholesterolemia One final point regarding preventive therapy is the issue of hypercholesterolemia. Increased total cholesterol is common in PBC and is believed to result from chronic cholestasis. This has naturally raised concerns about cardiovascular effects. A recent study confirmed earlier findings that there was no increased cardiac death among patients with PBC. In general, cholesterol levels will fall with cholestyramine therapy for pruritus and tend to come down as the disease progresses. If patients have other cardiac risk factors, there is no concern with using 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase inhibitors (statins), although they may not be necessary.


ESRD End-stage renal disease HH homozygous cystathionine -synthase deficiency HZ heterozygous cystathionine -synthase deficiency V vascular disease and mild hyperhomocysteinemia FH familial hypercholesterolemia H hypertension S smokers C healthy controls DM-2 type 2 diabetes mellitus PWV pulse wave velocity DC distensibility coefficient CC compliance coefficient Hcy plasma homocysteine concentration.

Lipid abnormalities

Unfavorable changes in lipoproteins, in part, may help explain the increased risk for cardiovascular disease observed with insulin-resistant states14-18. One of the major quantitative changes observed in insulin-resistant states is an elevation in triglyceride-rich lipopro-teins. This is often accompanied by a decreased HDL cholesterol level16. Thus, the characteristic lipid abnormalities (by association with insulin resistance) may be observed long before the diagnosis of type 2 diabetes. Although LDL cholesterol levels may be comparable to those seen in the general population, LDL compositional differences may make these particles more atherogenic. Specifically, insulin-resistant states are significantly associated with both quantitative changes (e.g. increased triglycerides, high apolipoprotein (apo)B, low apoAl levels) in the lipoproteins and also qualitative changes (e.g. low LDL cholesterol apoB and low HDL cholesterol low apoA1)16,19. Insulin resistance has also been associated...

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