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Query: UMLS:C0020473 (hyperlipidemia)
 15,891 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The relationships of lipoprotein cholesterol and triglyceride among lipoprotein fractions have potential significance for understanding atherogenesis and distinguishing among different classes of hyperlipidemia. We have compared these relationships in normolipidemic, hypercholesterolemic, hypertriglyceridemic, and combined hyperlipidemic participants in the Pacific Northwest Bell Telephone Company Health Survey. The cholesterol/triglyceride ratio in each lipoprotein fraction was moderately higher (1% to 26%) in hypercholesterolemia but significantly lower (20% to 50%) in hypertriglyceridemia, compared to normolipidemia. In combined hyperlipidemia, the very low density lipoprotein ratios were lower than in normolipidemia, but larger than in hypertriglyceridemia. These changes were directionally the same, but differed quantitatively, in both men and women. Correlation coefficients between cholesterol and triglyceride within each fraction varied by gender and sex hormone use. The largest correlations were seen in combined hyperlipidemic men for very low density lipoproteins, normolipidemic men for low density lipoproteins, and combined hyperlipidemic women taking hormones for high density lipoproteins. The correlation of very low and low density lipoprotein cholesterol was generally negative and was strongest for hormone users (r = -0.81) and weakest for nonusers (r = -0.06). Very low density lipoprotein triglyceride and high density lipoprotein cholesterol correlations were generally negative and were strongest in hypertriglyceridemic women not taking hormones (r = -0.55) and weakest in normolipidemic hormone users (r = -0.10). This correlation was positive for hypertriglyceridemic and combined hyperlipidemic hormone users.
Arteriosclerosis
PMID:Hyperlipidemia in the Pacific Northwest Bell Telephone Company Health Survey. Part 2. Lipoprotein lipid interrelationships. 657 60

Effects of chronic cigarette smoking on cerebral blood flow were investigated by measuring gray matter blood flow (Fg) using xenon 133 inhalation among 192 volunteers without cerebrovascular symptoms. There were 108 normal, healthy volunteers; 84 had risk factors for stroke (hypertension, hyperlipidemia, diabetes mellitus, and/or heart disease). Of both risk and nonrisk groups, 75 were habitual smokers (0.5 to 3.5 packs per day for 25 years). Comparisons of mean Fg values for both hemispheres showed significant reductions related to tobacco consumption and risk factors for stroke. Multiple-regression equations using smoking, age, risk, and alcohol consumption indicated a combined R2 value of 0.22. Smoking seems to be a potent risk factor decreasing cerebral blood flow probably by enhancing cerebral arteriosclerosis. Chronic cigarette smoking in persons with other risk factors further reduced Fg values in an additive manner when compared with subjects who had corresponding risk factors who did not smoke.
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PMID:Cigarette smoking decreases cerebral blood flow suggesting increased risk for stroke. 664 57

The pathogenesis of arteriosclerosis is unknown. As etiological factors which are associated with early development of arteriosclerosis hyperlipemia, cigarette smoking and hypertension are undisputed. More recently studies which show substantial pointers to regression of arteriosclerosis have become more numerous. It has been demonstrated by animal experiments that arteriosclerotic changes can be induced by a diet rich in cholesterol and furthermore can be brought to remission by low fat feeding and/or lipid lowering substances. Indirect pointers to regression, slower or no progressiveness of arteriosclerosis in man have been provided by autopsy findings and epidemiological studies. It has also been recorded angiographically that arteriosclerotic changes can be made to regress by a lipid lowering treatment.
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PMID:[Lipid lowering treatment and regression of arteriosclerosis (author's transl)]. 676 21

This study investigates the pedigree of 508 individuals over five generations identified by an individual with hypertriglyceridemia, familial hypercholesterolemia, and a IIb lipoprotein electrophoretic phenotype. The sample of 378 living individuals studied extensively for risk factors and disease status was distributed among maternal (170) and paternal (176) relatives and the codescendants (32) of the index case. It was found that the distributions of the plasma lipid and lipoprotein abnormalities in the different subsets of the kindred were consistent with the presence of two separate hereditary lipid disorders: familial hypercholesterolemia on the paternal side and familial hyperprebetalipoproteinemia on the maternal side. This combination of disorders with a possible contribution from factors influencing glucose metabolism was associated with high frequency of hypercholesterolemia and its clinical manifestations and of cardiovascular morbidity among the codescendants. An interaction effect is suggested as an explanation for the unusually high prevalence of hyperlipidemia among the codescendants and for the presence of a IIb phenotype in the index case.
Arteriosclerosis
PMID:Interaction of two lipid disorders in a large French-Canadian kindred. 682 93

Lipoprotein triglyceride and cholesterol concentrations and characteristics are described in normolipidemic and in three categories of hyperlipidemic subjects participating in the Pacific Northwest Bell Telephone Company Health Survey. For this study, 350 white participants 20 to 59 years of age with cholesterol or triglyceride values exceeding the age, sex, and hormone-use specific, population-based 90th percentile values were defined as having hypercholesterolemia, hypertriglyceridemia, or combined hyperlipidemia; 722 participants were classified as normolipidemic. In hypercholesterolemia, very low density lipoprotein cholesterol and triglyceride and high density lipoprotein cholesterol concentrations were higher than in normolipidemia. In hypertriglyceridemia, high density lipoprotein cholesterol was significantly lower in men and women not using sex hormones and low density lipoprotein triglyceride was significantly higher in men and women using hormones compared to normolipidemia. In combined hyperlipidemia, high density lipoprotein cholesterol concentrations were lower than in normolipidemia, but higher than in pure hypertriglyceridemia. The presence of beta migrating very low density lipoprotein and chylomicrons was seen primarily in hypertriglyceridemic or combined hyperlipidemic men. Sinking prebeta lipoprotein was equally common (20%) among all normolipidemic and hypercholesterolemic subjects, but was less common (5% to 10%) in hypertriglyceridemic and combined hyperlipidemic men and female hormone users. Quantitative and qualitative lipoprotein abnormalities associated with hyperlipidemia were found to vary by gender and by sex hormone use in women and were often, but not always, more marked in men.
Arteriosclerosis
PMID:Hyperlipidemia in the Pacific Northwest Bell Telephone Company Health Survey. Part 1. Lipoprotein cholesterol and triglyceride concentrations. 683 31

The response of the thoracic aorta to balloon-catheter-induced endothelial denudation was studied in two animal models of diabetes: the obese Zucker rat and the streptozotocin-treated Wistar rat. The obese Zucker rat, an animal with a metabolic profile similar to that of noninsulin-dependent human diabetics, was characterized by excessive body weight, hyperinsulinemia, hyperlipidemia, and a mild increase in plasma glucose levels. In Zucker rats sacrificed 3 weeks after endothelial denudation, the cross-sectional areas of the fibrocellular intimal lesions were found to be approximately twice as large as those of the lean control. In all other respects, the morphology of the lesions in the obese rats, as assessed by both light and transmission electron microscopy, was similar to that of the lean control rats. In streptozotocin-treated Wistar rats, neither the cross-sectional areas nor the morphology of the intimal lesions differed from those in control rats. These results indicate that, in the obese Zucker rat, the response to aortic intimal injury is altered.
Arteriosclerosis
PMID:Response of the aorta of the obese Zucker rat to injury. 702 12

To determine mechanisms of elevated plasma triglycerides (TG) in patients with primary hypertriglyceridemias, simultaneous studies were carried out on kinetics of very low density lipoprotein-triglycerides (VLDL-TG) and synthesis of cholesterol and bile acids. Sixteen hypertriglyceridemic patients with familial combined hyperlipidemia (FCHL) and 12 patients with poorly classified, primary hypertriglyceridemia were studied, and their results were compared to a series of normal and obese subjects previously studied in our laboratory. The mean value for transport (synthesis) of VLDL-TG in patients with FCHL was about twice normal. Although the upper normal synthesis rates overlapped with transport rates of some patients with FCHL, it appeared that the major cause of hypertriglyceridemia in FCHL was an elevated production of VLDL-TG. However, the height of the plasma TG in FCHL patients also was influenced by individual clearance capacities for VLDL-TG, and fractional clearance rates in several seemed particularly low. Synthesis rates for cholesterol and/or bile acids were high in several patients with FCHL, suggesting simultaneous overproduction of VLDL-TG and sterols; however, increased synthesis of both was not observed in all the patients. Most patients with poorly classified hypertriglyceridemia had over-production of VLDL-TG, but an apparent reduction in clearance was common. In these patients, increased synthesis of cholesterol and bile acids was infrequent. Our results indicate that abnormally high production of VLDL-TG seemed to be the major factor in causing primary hypertriglyceridemia, but that clearance capacity can play an important role in determining the the severity of the TG elevation.
Arteriosclerosis
PMID:Triglyceride and cholesterol metabolism in primary hypertriglyceridemia. 705 23

Male and female, Sprague--Dawley (S--D) and spontaneously hypertensive rats (SHR) with arteriosclerosis (breeders) and without arteriosclerosis (virgins) were fed a regular control diet or a diet high in CaPO4. After 45 days on the high Ca : P diet, there were no obvious adverse effects on the health, body, or organ weights of any animals. Although the high Ca : P diet did not cause any exacerbation of the spontaneous high blood pressure of SHR, it did cause hyperlipidemia and abnormally elevated corticosterone levels, but paradoxically, low normal levels of circulating Ca and P. Despite the fact that the high Ca : P diet produces kidney stones, there was no increase in the incidence of kidney stones which appear spontaneously in breeder rats. The high Ca : P diet did not alter the intimal hyalin lesions of the gonadal arterioles which appear spontaneously and exclusively in SHR breeders but it did produce severe exacarbation of the aortic calcification which appears spontaneously in repeatedly bred, S--D rats.
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PMID:Susceptibility and resistance of Sprague--Dawley and spontaneously hypertensive rats to aortic calcification induced by a diet high in CaPO4. 737 25

The results of treatment with the Ligustrum japonicum Thunb. Var. Pubescens Koidz (LJ) in rabbits' model of hyperlipemia and atherosclerosis was observed. The results showed: (1) By the end of first to third month, the levels of serum TL and TC in groups B,C were lower than that of group A and there was significant difference between them (P < 0.05), the level of serum TG in groups B,C was lower than that of group A too, but there was no significant difference between them (P > 0.05). (2) By the end of first and second month, the level of serum LPO in groups B,C was lower than that of group A and there were significant difference between them (P < 0.05, 0.01), while there was no significant difference between group B and group C (P > 0.05). (3) The rabbits were sacrificed by the end of third month, arteriosclerotic area of aorta in groups B,C were less than that of group A, and that of group B was even less than group C, there was significant difference between group A and B (P < 0.01). (4) By the end of third month, the level of HCT in groups B,C was lower than that of group A and there was significant difference between them (P < 0.05), but there was no significant difference between group B and group C (P > 0.05). These results showed that LJ could lower the levels of serum TL, TC, LPO, HCT and anti-arteriosclerosis as well, it could prevent cerebro- and cardio-vascular disease as the clofibrate.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Preliminary study on pharmacologic action of Ligustrum japonicum]. 770 37

A low pulse wave amplitude during calf plethysmography at 55 years of age was previously found to be associated with an increased mortality and incidence of myocardial infarction. In order to test the hypothesis that a low pulse wave amplitude is associated with an increased risk of future leg atherosclerosis as well, we have studied the relationship between a low ankle-brachial pressure index (ABPI; < 0.9) at 68 years of age and the pulse wave amplitude at 55 years of age in that same cohort. The prevalence of a low pulse wave amplitude (< or = 5 mm; lowest quintile) among men with a low ABPI (42%) was more than twice as high as it was among men who had a normal ABPI (19%) (P < 0.001). No association was found between a low ABPI and the plethysmographically recorded leg blood flow at 55 years of age. A low pulse wave amplitude might reflect early symptom-free arteriosclerosis, or age-dependent non-arteriosclerotic loss of vessel wall elasticity. The relationship between a low pulse wave amplitude and a low ABPI remained when controlling for smoking, hypertension and hyperlipidaemia. It is concluded that pulse wave measurement by plethysmography contributes information to improve leg atherosclerotic risk assessment in individuals exposed to known risk factors.
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PMID:Plethysmographic pulse wave amplitude and future leg arteriosclerosis. 775 55


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