The carbohydrate composition of human apo low density lipoprotein from normal and type II hyperlipoproteinemic subjects

1976 ◽  
Vol 54 (1) ◽  
pp. 42-49 ◽  
Author(s):  
P. Lee ◽  
W. Carl Breckenridge
Keyword(s):  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Normal Subjects ◽  
Low Density ◽  
Type Ii ◽  
Carbohydrate Composition ◽  
Acetylneuraminic Acid ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic

The carbohydrate composition of the apoprotein from low density lipoprotein (LDL) of normal (average LDL cholesterol, 122 mg/100 ml) and type II hyperlipoproteinemic (average LDL cholesterol, 236 mg/100 ml) males was studied using gas–liquid chromatographic analysis of the methyl glycoside derivatives. All samples containing detectable sinking pre-beta-lipoprotein were excluded from the study.The apo LDL from both groups of subjects contained mannose, galactose, N-acetylglucosamine, and N-acetylneuraminic acid. Glucose and fucose were not found while trace quantities of galactosamine were detected. Although the quantities of galactose and N-acetylglucosamine were the same in the two groups, lower quantities of mannose [Formula: see text] and N-acetylneuraminic acid [Formula: see text] were found in the type II patients as opposed to normal subjects.

Effect of changing dietary fat saturation on low-density lipoprotein metabolism in man

1981 ◽  
Vol 241 (1) ◽  
pp. E57-E63 ◽  
Author(s):  
J. D. Turner ◽  
N. A. Le ◽  
W. V. Brown
Keyword(s):  
Production Rate ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Saturated Fat ◽  
Density Lipoprotein ◽  
Normal Subjects ◽  
Low Density ◽  
Type Ii ◽  
Polyunsaturated Fat ◽  
Fat Saturation

The mechanism of change in low-density lipoprotein (LDL) levels by diets differing in fat saturation have been studied. Turnover of 125I-LDL was measured in eight subjects with type II hyperlipoproteinemia and in seven normal control subjects during two dietary periods containing 40% of calories as either safflower oil (polyunsaturated fat, PSF) or as lard (saturated fat, SF). Higher levels of LDL apoprotein and LDL-cholesterol were observed in both groups on saturated fat. Subjects with elevated LDL levels (type II) showed a more marked effect of polyunsaturated fat with 25% lower LDL production rate as compared to a reduction of only 10% for the control group. On the PSF diet, the production rate in type II (12.7 mg.kg-1.day-1) was not statistically different from normal subjects (10.5 mg.kg-1.day-1). On this diet, the higher levels of LDL cholesterol in the type II subjects (as compared to controls) were due to a lower fractional clearance rate, mean of 0.27/day compared to a mean of 0.39/day for the normal subjects. Although individuals with type II hyperlipoproteinemia may have a primary clearance defect, the major reduction in plasma cholesterol concentrations achieved with a diet high in polyunsaturated fat can be attributed to a significantly lower LDL production.

PEDIATRIC FAMILIAL TYPE II HYPERLIPOPROTEINEMIA: THERAPY WITH DIET AND CHOLESTYRAMINE RESIN

PEDIATRICS ◽  
1973 ◽  
Vol 52 (5) ◽  
pp. 669-679
Author(s):  
C. J. Glueck ◽  
R. Fallat ◽  
R. Tsang
Keyword(s):  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Lipoprotein Cholesterol ◽  
Low Density ◽  
Type Ii ◽  
Drug Adherence ◽  
Low Density Lipoprotein Cholesterol ◽  
Familial Type ◽  
Low Cholesterol

Effects of a low cholesterol (<300 mg/day), polyunsaturate rich (P:S 1.5/1) diet and cholestyramine (12 gm active resin/day) were studied in 36 children with familial type II hyperlipoproteinemia. In 11 children after six months on diet alone, cholesterol and low density lipoprotein cholesterol (LDL) were reduced to normal levels. Twenty of the 25 children whose cholesterol and LDL remained elevated on diet received 12 gm of cholestyramine per day in addition to diet. Ten of these 20 children had good drug adherence. Cholesterol and LDL cholesterol fell to normal or near normal levels in six of these ten children on cholestyramine and diet for 6 and 12 months. Ten of the 20 children had fair drug adherence (8 gm of cholestyramine taken per day) and none sustained notable decrements in cholesterol or LDL after 6 and 12 months of cholestyramine and diet. Overall, there were reductions of LDL cholesterol to normal or near normal levels in 11 of 38 children (31%) with diet alone, and in six of ten children (60%) with diet and added cholestyramine.

scholarly journals A study of lipid profile Levels of Type II Diabetes Mellitus

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Murwan Khalid Sabahelkhier ◽  
Mohammed Ali Awadllah ◽  
Atif Saeed Mohammed Idrees ◽  
Ali Abdel-Ghaffar Abel Rahheem Mohammed ◽  
Mohammed Abdel Rahman Idris
Keyword(s):  
Blood Glucose ◽  
Lipid Profile ◽  
Total Cholesterol ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Diabetic Patients ◽  
Low Density ◽  
Type Ii

This study consists of two parts; the Part one is to evaluate the level of Blood glucose and lipid profile  among diabetic patients(121 patients) which are compared with non-diabetic subjects (60 persons)  and  part two is to correlate lipid profile with cardiovascular abnormalities among type II diabetic patients. The diabetic patients were collected from Jabir Aboeleiz Center for Diabetes (51.9±11.22 years). Sixty healthy non-diabetic subjects were chosen as controls (52.44±10.76years). Blood glucose, total cholesterol (TC), triglycerides (TG) and high density lipoprotein (HDL) were measured by enzymatic colorimetric methods in both groups, and low density lipoprotein cholesterol (LDL) was calculated for each sample. Among diabetic patients, there is high glucose level, serum total cholesterol, triglycerides and LDL cholesterol (p<0.5), while low level of HDL cholesterol was observed when compared to non-diabetic subjects. No statistically variation was found in the level of glucose and lipid profile between male and female diabetic patients. In our study, we have found that serum lipid - cholesterol, triglycerides and low-density lipoprotein - levels were significantly (p < 0.05) correlated to cardiovascular abnormalities, while HDL had shown a statistically non-significant correlation (p>0.05). The study concluded that higher level of cholesterol, triglyceride and LDL-cholesterol in diabetic patients compared to non-diabetic subjects with lower level of serum HDL-cholesterol in diabetic patient compared to non- diabetic subjects.Keywords: Diabetic, Insulin, Mellitus and lipid.

Isolation and carbohydrate composition of glycopeptides of human apo low-density lipoprotein from normal and type II hyperlipoproteinemic subjects

1976 ◽  
Vol 54 (9) ◽  
pp. 829-833 ◽  
Author(s):  
P. Lee ◽  
W. Carl Breckenridge
Keyword(s):  
Molecular Weight ◽  
Low Density Lipoprotein ◽  
Gel Filtration ◽  
Density Lipoprotein ◽  
Major Portion ◽  
Low Density ◽  
Type Ii ◽  
Carbohydrate Composition ◽  
Considerable Heterogeneity ◽  
Normal Individuals

Glycopeptides were prepared from the delipidized protein of low-density lipoprotein (LDL, d = 1.019–1.063) of three normal and three familial heterozygous type II hyperlipoproteinemic (HLP) subjects. The glycopeptides of all subjects were resolved into three groups by gel filtration on Bio-Gel P6 following papain (EC 3.4.22.2) digestion and initial purification on Bio-Gel P2. In normal individuals the component of largest molecular weight (F-1) contained mannose (Man), N-acetyl glucosamine (GlcNAc), galactose (Gal), and N-acetyl neuraminic acid (NANA) in the respective amounts of 45.9 ± 6.7, 37.3 ± 5.9, 28.6 ± 3.4, and 27.0 ± 3.9 nmol/mg original apoprotein. The group of smallest molecular weight (F-3) contained essentially only Man (25.8 ± 1.5 nmol/mg protein) and GlcNac (3.0 ± 0.4 nmol/mg protein) with traces of Gal and NANA. A group of intermediate molecular weight (F-2) exhibited considerable heterogeneity and contained Man, GlcNAc, Gal, and NANA in the amounts of45.9 ± 5.1, 18.3 ± 1.7, 11.0 ± 1.7, and 7.7 ± 1.2 nmol/mg protein. While the major portion of NANA (78%), Gal (71%), and GlcNAc (64%) was present in F-1, approximately 22% of the total Man was in F-3. No major differences were detected in the carbohydrate composition of the three glycopeptide fractions of LDL apoprotein from normal and Type II subjects.

Effect of Phenobarbitone on Plasma Lipids in Normal Subjects

1976 ◽  
Vol 50 (5) ◽  
pp. 349-353 ◽  
Author(s):  
P. N. Durrington ◽  
C. J. C. Roberts ◽  
Lyn Jackson ◽  
R. A. Branch ◽  
M. Hartog
Keyword(s):  
Ldl Cholesterol ◽  
Plasma Lipids ◽  
Plasma Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Normal Subjects ◽  
Low Density ◽  
Total Plasma Cholesterol ◽  
Total Plasma ◽  
Antipyrine Clearance

1. Phenobarbitone in a dose of 180 mg daily was administered to ten normal subjects for 3 weeks. There was a significant increase in total plasma cholesterol, plasma low-density-lipoprotein cholesterol, plasma low-density-lipoprotein (LDL) triglycerides and plasma LDL protein. The increase in plasma LDL cholesterol accounted for the increase in total plasma cholesterol. There was a significant reduction in the ratio of LDL cholesterol to LDL protein. 2. No significant changes were observed in total plasma triglycerides, plasma very-low-density-lipoprotein (VLDL) triglycerides, plasma VLDL cholesterol or plasma VLDL protein. 3. Evidence that drug-metabolizing enzymes were induced by phenobarbitone was provided by an increase in antipyrine clearance. No relationship was observed between changes in plasma cholesterol and changes in antipyrine clearance. Serum γ-glutamyl transpeptidase was also increased after phenobarbitone administration, the increase being unrelated to changes in antipyrine clearance or plasma cholesterol.

Platelet Aggregation and Plasma Lipoproteins in Alcoholics During Alcohol Withdrawal

1986 ◽  
Vol 55 (02) ◽  
pp. 173-177 ◽  
Author(s):  
K Desai ◽  
J S Owen ◽  
D T Wilson ◽  
R A Hutton
Keyword(s):  
Platelet Aggregation ◽  
Alcohol Withdrawal ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Plasma Lipoprotein ◽  
Cholesterol Concentration ◽  
Arachidonic Acid Content ◽  
Low Density

SummaryPlatelet aggregation, platelet lipid composition and plasma lipoprotein concentrations were measured each week in a group of seventeen alcoholics, without overt liver disease, for one month, following acute, total alcohol withdrawal. The platelets were initially hypoaggregable but, within 1-2 weeks of cessation of drinking, they became hyperaggregable and then gradually returned towards normal values. Hyperaggregability could not be explained by increases in either the cholesterol or the arachidonic acid content of the platelets. Plasma very-low-density lipoprotein cholesterol levels remained high throughout the study, but the initially raised levels of high-density lipoprotein (HDL) cholesterol fell by 26%. Low-density lipoprotein (LDL) cholesterol concentration rose by 10% after two weeks of withdrawal but then returned to about the starting level. The resulting changes in the plasma LDL-cholesterol: HDL-cholesterol ratio, which had increased by more than 50% after two weeks of abstinence, essentially paralleled the time course of enhanced platelet reactivity in all but four of the alcoholics. These findings suggest that alterations in plasma lipoprotein concentrations during acute alcohol withdrawal may be a contributory factor to the haemostatic disorders present in such patients.

scholarly journals Effects of Weight Gain after 20 Years of Age and Incidence of Hyper-Low-Density Lipoprotein Cholesterolemia: The Iki Epidemiological Study of Atherosclerosis and Chronic Kidney Disease (ISSA-CKD)

2021 ◽  
Vol 10 (14) ◽  
pp. 3098
Author(s):  
Shota Okutsu ◽  
Yoshifumi Kato ◽  
Shunsuke Funakoshi ◽  
Toshiki Maeda ◽  
Chikara Yoshimura ◽  
...  
Keyword(s):  
Weight Gain ◽  
General Population ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Population Based ◽  
Lipid Lowering ◽  
Low Density ◽  
Obesity Hypertension ◽  
Old Men

The aim of this study was to investigate the effects of long-term weight gain from the age of 20 on incidence of hyper-low-density-lipoprotein (LDL) cholesterolemia in the general population of Japanese people. Methods: We conducted a population-based retrospective cohort study using annual health checkup data for residents of Iki City, Nagasaki Prefecture, Japan. A total of 3179 adult (≥30 years old) men and women without hyper-LDL cholesterolemia at baseline, who underwent two or more health checkups were included in the analysis. Information on weight gain (≥10 kg) after 20 years of age was obtained using questionnaire. The outcome of this study was development of hyper-LDL cholesterolemia defined as LDL-cholesterol level ≥3.62 mmol/L and/or initiation of lipid-lowering medications. Results: During a mean follow-up period of 4.53 years, 665 of the 3179 participants developed hyper-LDL cholesterolemia (46.5/1000 person-years). The incidence of hyper-LDL cholesterolemia was higher in participants with a weight gain of ≥10 kg (55.3/1000 person-years) than among those with a weight gain of <10 kg (41.8/1000 person-years). This association remained statistically significant even after adjustment for age, sex, smoking, daily drinking, exercise, obesity, hypertension, and diabetes (multivariable hazard ratio 1.31, 95% confidence interval 1.08–1.58, p = 0.006). Conclusion: A weight gain of ≥10 after 20 years of age affected the development of hyper-LDL cholesterol regardless of age, sex, and obesity in a general population of Japanese.

Characterization of glycopeptides derived from the low-density lipoprotein of hen's egg yolk

1968 ◽  
Vol 46 (8) ◽  
pp. 983-988 ◽  
Author(s):  
J. Z. Augustyniak ◽  
W. G. Martin
Keyword(s):  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Egg Yolk ◽  
Low Density ◽  
Amide Nitrogen ◽  
Acetylneuraminic Acid ◽  
Hen’S Egg ◽  
Terminal Amino ◽  
Protein Moiety

Two glycopeptides (A and B) were isolated from pronase-digested vitellenin, the protein moiety of the low-density lipoprotein of hen's egg yolk. Aspartic acid was the only N-terminal amino acid of both glycopeptides but only A contained N-acetylneuraminic acid. A contained 55% hexose (mannose), 14% hexosamine, 12% N-acetylneuraminic acid, 0.71% amide nitrogen, and its molecular weight was 2.3 × 103. The corresponding values for B were 64, 17, 0.0, 0.75, and 2.0 × 103. Chemical analyses showed that B (and probably A) occurs in vitellenin with the heteropolysaccharide group bound N-glycosidically via the β-amide group of an asparaginyl residue. The indicated structure is R∙(NH)Asp∙Thr∙Ser∙(Ala, Gly, Val)∙Ile, where R, the heteropolysaccharide group, contains 2 hexosamine and 8 hexose residues.

Effect of the periparturient period on serum lipid and cholesterol lipoprotein concentrations in goats (Capra hircus)

2011 ◽  
Vol 59 (4) ◽  
pp. 445-454 ◽  
Author(s):  
Ewa Skotnicka ◽  
Zbigniew Muszczyński ◽  
Maria Suska
Keyword(s):  
Serum Lipid ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Capra Hircus ◽  
Low Density ◽  
Total Lipids ◽  
Blood Samples ◽  
Periparturient Period

Blood samples were taken from 12 goats during the periparturient period (4 and 1 weeks before and 2, 10 and 30 days after delivery), and from 10 nonpregnant goats. The following variables were determined: total lipids (TL), triacylglycerol (TG), total cholesterol (TCH) and high-density lipoprotein (HDL) cholesterol and low-density lipoprotein (LDL) cholesterol fractions. One week before delivery TL (2.32 ± 0.12 g/l, P ≤ 0.05), TG (0.32 ± 0.16 mmol/l, P ≤ 0.001) and TCH concentrations (1.65 ± 0.42 mmol/l, P ≤ 0.05) were significantly increased as compared to non-pregnant goats (2.08 ± 0.28 g/l, 0.15 ± 0.05 mmol/l, 1.38 ± 0.19 mmol/l, respectively). After delivery, the concentrations of TL, TG, TCH and HDL decreased significantly. The lowest TG concentration was observed 2 days after delivery (0.18 ± 0.02 mmol/l), while TL (1.73 ± 0.21 g/l), TCH (0.95 ± 0.21 mmol/l) and HDL (0.74 ± 0.16 mmol/l) reached the lowest level 10 days after delivery. Two days after delivery a significant increase of LDL concentration was observed (0.38 ± 0.04 mmol/l); however, ten days after delivery a threefold decrease was shown in the LDL concentration (0.12 ± 0.04 mmol/l). A month after delivery all the variables studied reached levels similar to those measured in non-pregnant goats.

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