Circadian rhythmic variations in serum concentrations of clinically important lipids

1994 ◽  
Vol 40 (8) ◽  
pp. 1549-1553 ◽  
Author(s):  
A Rivera-Coll ◽  
X Fuentes-Arderiu ◽  
A Díez-Noguera
Keyword(s):  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Daily Maximum ◽  
Serum Concentrations ◽  
Oral Temperature ◽  
Low Density Lipoprotein Cholesterol ◽  
Apo B ◽  
Biological Time ◽  
Cosine Functions ◽  
Apparently Healthy

Abstract Twenty-five apparently healthy adults (13 men and 12 women), mean age 29.5 years (SD 3.6 years), served as subjects in a 24-h study conducted in Barcelona (Spain) in spring of 1990. Six blood samples were collected from each subject at 4-h intervals over a 24-h period, beginning at 1000. The oral temperature was measured at 2-h intervals to facilitate an independent biological time reference. The serum concentrations of apolipoprotein (apo) A-I, apo B, cholesterol, high- and low-density lipoprotein cholesterol, and triglyceride were measured. The circadian rhythms of these quantities were studied with use of a periodic function resulting from the sum of two cosine functions of 24 and 12 h. For serum concentrations of apo A-I and apo B, only the 24- or 12-h components, respectively, were significant. However, the other quantities studied were significantly affected by both rhythmic components. The maximum daily rhythmic variation ranged from 5% (with respect to the daily mean) for apo A-I to 63% for triglyceride concentration. In all cases except triglyceride, the daily maximum values were measured in the afternoon samples, near the time of maximum oral temperature.

scholarly journals Changes in hormonal and metabolic status in men of an ethnic group Komi with overweight and obesity

2013 ◽  
Vol 10 (2) ◽  
pp. 28-32
Author(s):  
L V Osadchuk ◽  
N V Gutorova ◽  
A Yu Ludinina ◽  
N N Potolitsyna ◽  
E R Bojko
Keyword(s):  
Ethnic Group ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Komi Republic ◽  
Overweight And Obesity ◽  
Control Group ◽  
Reproductive Hormone ◽  
Serum Concentrations ◽  
Low Density Lipoprotein Cholesterol ◽  
Thyrotrophic Hormone

The aim of this study was to compare hormonal, anthropometric and metabolic parameters in men of the komi ethnic group with (n=23, BMI ≥25 kg/м2) or without (n=39, 18.4≤BMI 25 kg/м2) obesity. Totally 62 males living in Komi Republic were included in the study. It has been established that obesity was accompanied by an increase in serum concentrations of cholesterol and low density lipoprotein cholesterol in comparison with control group indicating metabolic disturbance. The data shows the significant effect of BMI on testosterone and FSH serum concentration, but not on LH, estradiol, thyrotrophic hormone, thyroxin and triiodthyronin levels. Overweight and obese men had lower circulating testosterone and higher FSH level in comparison with the controls. The reproductive hormone changes in overweight and obese men can result in deleterious effects on sexual functions including erectile dysfunction, reduced libido and alteration in spermatogenesis

scholarly journals Biological variability in serum vitamin E concentrations: relation to serum lipids

1996 ◽  
Vol 42 (11) ◽  
pp. 1824-1831 ◽  
Author(s):  
M Maes ◽  
S Weeckx ◽  
A Wauters ◽  
H Neels ◽  
S Scharpé ◽  
...  
Keyword(s):  
Vitamin E ◽  
Serum Lipids ◽  
Low Density Lipoprotein ◽  
Serum Vitamin ◽  
Density Lipoprotein ◽  
Low Density Lipoprotein Cholesterol ◽  
Apo B ◽  
Positive Time ◽  
Index Of Individuality ◽  
The Mean

Abstract The components of biological variation in serum vitamin E in relation to serum cholesterol, triglycerides, high- and low-density lipoprotein cholesterol (HDL-C, LDL-C), apolipoprotein A-I (apo A-I), and apo B were examined in 26 healthy volunteers who had monthly blood samplings during one calendar year. The estimated CVs for vitamin E were: interindividual, 19.9%, and intraindividual, 11.9%; the index of individuality (I-index) was 0.59. The I-indices for all lipid variables were < 0.51. Serum concentrations of vitamin E, cholesterol, triglycerides, HDL-C, LDL-C, and apo B were lower in spring than in the other seasons. The peak-trough differences in the yearly variations, expressed as a percentage of the mean, were for vitamin E 14.5%, cholesterol 16.2%, triglycerides 14.5%, and LDL-C 24.3%. A significant common annual rhythm was expressed in vitamin E or lipid variables and in the changes in ambient temperature the weeks before blood sampling (inverse relations). There were highly significant positive time relations between serum vitamin E and cholesterol, triglycerides, and apo B. Subjects with higher homeostatic setpoints of cholesterol showed higher homeostatic setpoints of vitamin E, triglycerides, LDL-C, and apo B.

scholarly journals Familial Defective Apolipoprotein B-100: A Study of Patients from Lipid Clinics in Scotland and Wales

1996 ◽  
Vol 33 (5) ◽  
pp. 443-450 ◽  
Author(s):  
Philip R Wenham ◽  
Peter Bloomfield ◽  
Gillian Blundell ◽  
Michael D Penney ◽  
Peter W H Rae ◽  
...  
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Common Ancestor ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Pedigree Analysis ◽  
Lipid Lowering ◽  
Low Density Lipoprotein Cholesterol ◽  
Apo B ◽  
History Of

Familial defective apolipoprotein (apo) B-100 (FDB) is an autosomal codominant disorder, which may be associated with hypercholesterolaemia. The defect is caused by the substitution of glutamine for arginine at amino acid residue 3500 of apo B-100. A total of 357 hypercholesterolaemic patients, 48 with a clinical diagnosis of familial hypercholesterolaemia attending lipid clinics in Scotland and Wales, were screened for the presence of FDB. Seven unrelated individuals, five of whom had a family history of coronary heart disease, and a further 11 first-degree relatives, were shown to be heterozygous for the mutation. Pedigree analysis demonstrated the mutation to be present on a single haplotype, suggesting that in Britain it is inherited from a common ancestor. Treatment of 11 heterozygous individuals with lipid-lowering medication showed falls in total and low density lipoprotein cholesterol ranging from 11·6 to 38·8% and 5·3 to 49·5%, respectively. In view of the condition's association with coronary heart disease and hypercholesterolaemia, it may be worthwhile identifying carriers attending lipid clinics, so that affected siblings can be offered cholesterol-lowering treatment where necessary.

scholarly journals Hypothyroidism Reduces the Size of Ovarian Follicles and Promotes Hypertrophy of Periovarian Fat with Infiltration of Macrophages in Adult Rabbits

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
J. Rodríguez-Castelán ◽  
M. Méndez-Tepepa ◽  
Y. Carrillo-Portillo ◽  
A. Anaya-Hernández ◽  
J. Rodríguez-Antolín ◽  
...  
Keyword(s):  
Uric Acid ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Ovarian Follicles ◽  
High Serum ◽  
Low Density ◽  
Serum Concentrations ◽  
Low Density Lipoprotein Cholesterol ◽  
Ovary Function ◽  
Visceral Adipose

Ovarian failure is related to dyslipidemias and inflammation, as well as to hypertrophy and dysfunction of the visceral adipose tissue (VAT). Although hypothyroidism has been associated with obesity, dyslipidemias, and inflammation in humans and animals, its influence on the characteristics of ovarian follicles in adulthood is scarcely known. Control and hypothyroid rabbits were used to analyze the ovarian follicles, expression of aromatase in the ovary, serum concentration of lipids, leptin, and uric acid, size of adipocytes, and infiltration of macrophages in the periovarian VAT. Hypothyroidism did not affect the percentage of functional or atretic follicles. However, it reduced the size of primary, secondary, and tertiary follicles considered as large and the expression of aromatase in the ovary. This effect was associated with high serum concentrations of total cholesterol and low-density lipoprotein cholesterol (LDL-C). In addition, hypothyroidism induced hypertrophy of adipocytes and a major infiltration of CD68+ macrophages into the periovarian VAT. Our results suggest that the reduced size of ovarian follicles promoted by hypothyroidism could be associated with dyslipidemias, hypertrophy, and inflammation of the periovarian VAT. Present findings may be useful to understand the influence of hypothyroidism in the ovary function in adulthood.

scholarly journals Correlation of Small Dense LDL Cholesterol and Apolipoprotein B with LDL Cholesterol and its Clinical Significance in Overweight, Type 2 Diabetes Mellitus and Coronary Artery Disease

2016 ◽  
Vol 14 (2) ◽  
pp. 36-40 ◽  
Author(s):  
Arabinda Mohan Bhattarai ◽  
HS Batra ◽  
Suchit Bandyopadhyay ◽  
Pratibha Misra ◽  
Manushri Sharma ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Apolipoprotein B ◽  
Ldl Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Low Density ◽  
Low Density Lipoprotein Cholesterol ◽  
Apo B ◽  
Artery Disease

Introduction: Atherosclerotic Coronary Artery Disease (CAD) is fundamentally related to disorders of lipid metabolism. Health problems like obesity, glucose intolerance and metabolic syndrome increase atherosclerotic CAD risk.  A fraction of Low density lipoprotein cholesterol (LDL) is called small dense low density lipoprotein cholesterol (sdLDL). These particles are more atherogenic because they are taken up more easily by arterial wall, readily oxidized and not easily cleared from plasma. Every LDL particle contain an Apo B molecule.Methods: In this cross sectional study we recruited 100 known cases each of CAD, type 2 diabetes, overweight and 100 age and sex matched healthy controls. We took a detailed case summary along with anthropometric measurements. We measured sdLDL by heparin magnesium precipitation method followed by direct estimation of the LDL in the supernatant.Result: Linear regressive analysis showed positive correlation between sdLDL and Apolipoprotein B (Apo B) with LDL cholesterol (r=0.61, p=0.004), (r=0.754, p=0.0034) respectively. Multiple Comparisons after Kruskalwallis test of sdLDL and Apo B levels of  type 2 diabetes, CAD and overweight with controls were significant (p<0.001).Conclusion: Our findings suggest that the estimation of sdLDL and Apo B provide a complimentary benefit in assessment of cases with CAD, type 2 diabetes and overweight.

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