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PubMed2005

[Regulative effect of Opuntia powder on blood lipids in rats and its mechanism].

OBJECTIVE: To observe the regulative effect of opuntia powder on blood lipids in wistar rats and to explore its mechanism. METHOD: Forty normal rats were divided into four groups:control group (fed with basal feed), opuntia high, middle and low dosage groups (fed with basal feed and opuntia powder of high, middle and low dosage. The influence of opuntia powder on serum total cholesterol (TC), triglyceride (TG), high density lipoprotein-cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), arteriosclerosis index (AI), serum malondialdehyde (MDA), superoxide dismutase (SOD) were observed. (2) All of the hyperlipemia wistar rats for experiments were divided into four groups: model control group and other three groups (high, middle, low dosage groups respectively). Three weeks later, samples of blood were taken for survey of levels of TC, TG HDL-C, LDL-C, AI, MDA, SOD. RESULT: After opuntia powder treatment,the level of TC in nomal wistar rats was decreased. However, there was no significant difference comparing with control group (P > 0.05). The serum MAD level in the low, middle and high dosage groups were all obviously decreased, which were significantly lower than that in the control group. The SOD activities were all higher than that in the control group. The level of TC, LDL-C, AI (P < 0.01), TG (P < 0.05) were lower significantly in hyperlipemia wistar rats after treated by opuntia powder of high, middle and low dosage. The down-regulation of blood lipids was related with the dosage of opuntia powder. CONCLUSION: The opuntia powder may regulate the level of blood lipids in normal and hyperlipemia wistar rats. The effect is more obviously in hyperlipemia rats than that in normal rats.

Animals↗
PubMed1997

The effects of long-term, moderate intensity, intermittent exercise on aerobic capacity, body composition, blood lipids, insulin and glucose in overweight females.

OBJECTIVE: To test the hypotheses that the accumulation of 30 min of moderate intensity, intermittent exercise, 5d/week-1, for 32 weeks, will increase aerobic capacity, alter body composition and improve blood lipids, insulin and glucose. Secondly, to identify individuals who may respond to moderate intensity, intermittent exercise. SUBJECTS: Thirteen sedentary, moderately obese females, aged 43 +/- 11 (y), body mass index (BMI) 32.7 +/- 7.7 (kg/M2), body fat 40.6 +/- 8.8 (%), VO2max 24.0 +/- 4.6 (ml/kg-1/min-1). MEASUREMENTS: Aerobic capacity, body composition, blood lipids, fasting insulin and glucose, energy intake. RESULTS: Group data showed no significant changes for aerobic capacity, body composition, blood lipids, insulin or glucose. However, 7 of the 13 subjects increased aerobic capacity, lost fat weight and improved insulin. Adherence to the exercise regimen was excellent with 82.6 +/- 10.0% of the exercise completed. CONCLUSIONS: Moderate intensity, intermittent exercise for a total of 30 min, 5d/week,-1 for 32 weeks duration, was not a sufficient stimulus to significantly increase aerobic capacity, and alter weight, body composition or improve blood lipids, insulin or glucose for the entire group. However, those subjects who increased aerobic capacity and decreased fat weight were significantly older, had lower maximal aerobic capacity and greater body fat at baseline compared to the six subjects who did not increase aerobic capacity and decrease fat weight. For both groups, moderate intensity, intermittent exercise showed excellent adherence and this may be a useful model for future research studies.

Adult↗
PubMed1994

Coffee consumption: relationship to blood lipids in middle-aged women.

BACKGROUND: There is controversy about the relationship between coffee intake and blood lipids in women and many studies fail to control for potential confounding factors. METHODS: In 1983 and 1984, 541 randomly selected premenopausal women were recruited from a list of licenced drivers, aged 42-50, within selected areas in Allegheny County, Pennsylvania. They were invited to participate in a 5-year study of biological and behavioural changes associated with menopause. At baseline and the first follow-up visit, lipoprotein, lipid and apoprotein levels, physical activity, dietary intake and coffee consumption were measured. Pearson correlations between coffee consumption and the various lipid values were calculated. Multivariate analyses, which controlled for the potential confounding effects of body mass index, alcohol intake, percent of calories from carbohydrate and fat, number of cigarettes smoked per day, physical activity level, and age in months, were also employed to investigate the relationships. RESULTS: Mean coffee consumption for the group was 3.35 cups of coffee per day at baseline and 3.02 cups per day at follow-up. Results of analyses of correlation between coffee consumption and blood lipids as well as multiple regressions to control for menopausal status at follow-up were non-significant (P > 0.05) for all blood lipid values with the exception of triglycerides, which were inversely related to coffee consumption at follow-up. CONCLUSIONS: These results do not support a relationship between coffee consumption and lipoprotein, lipid or apoprotein levels with the exception of an inverse relationship between coffee consumption and triglyceride level at follow-up.

Adult↗
PubMed2002

Effects of resistance training and detraining on muscle strength and blood lipid profiles in postmenopausal women.

OBJECTIVES: To study the effects of eight weeks of supervised, low intensity resistance training (80% of 10 repetition maximum (10RM)) and eight weeks of detraining on muscle strength and blood lipid profiles in healthy, sedentary postmenopausal women. SUBJECTS: Fifteen postmenopausal women, aged 49-62 years, took part in the study. Subjects were assigned to either a control (n = 7) or training (n = 8) group. The training regimen consisted of three sets of eight repetitions of leg press, bench press, knee extension, knee flexion, and lat pull-down, three days a week at 80% of 10RM. Dynamic leg strength, 10RM, and blood lipid profiles (total cholesterol (TC), low and high density lipoprotein cholesterol (LDL-C, HDL-C), triglycerides, and very low density lipoprotein cholesterol (VLDL-C)) were measured at baseline, after eight weeks of training, and after a further eight weeks of detraining. RESULTS: Eight weeks of resistance training produced significant increases in knee extension (F(1,13) = 12.60; p<0.01), bench press (F(1,13) = 13.79; p<0.01), leg press (F(1,13) = 15.65; p<0.01), and lat pull-down (F(1,13) = 16.60; p<0.005) 10RM strength tests. Although 10RM strength decreased after eight weeks of detraining, the results remained significantly elevated from baseline measures. Eight weeks of training did not result in any significant alterations in blood lipid profiles, body composition, or dynamic isokinetic leg strength. There were no significant differences in any of the variables investigated over the 16 week period in the control group. CONCLUSIONS: These data suggest that a short, low intensity resistance training programme produces substantial improvements in muscle strength. Training of this intensity and duration was not sufficient to produce significant alterations in blood lipid concentrations.

Blood Pressure↗
PubMedDate not supplied

[Unsaturated blood lipids in breast cancer patients].

The degree of unsaturation of blood lipids in patients having undergone radical surgery for mammary cancer was studied. It was shown that the content of double bonds in the lipids of plasma and red cells in cancer patients is significantly lower than in patients with diffuse cancer but higher than in patients with benign breast tumors. It was also established that there exists a relationship between the degree of lipid unsaturation, the tumor spread (stage of the disease, metastases into the regional lymph nodes), and also patient survival. Variations in the double-bond level of blood lipids depending on the morphological structure of the tumor were established.

Adult↗
PubMed1997

Blood-lipid fractions: the side-effects and continuation of Norplant use.

OBJECTIVES: Norplant has been widely used in Indonesia, though a previous study conducted in Jakarta indicates that there is a significantly high cholesterol level in acceptors. Other international studies indicate different results. Accordingly, a study on the fraction of blood lipids of Norplant acceptors was considered necessary. MATERIAL AND PROCEDURES: A prospective cohort comparative study was conducted in the Dr Kariadi General Hospital and Primary Health Center at Gunungpati. Clinical and laboratory observations were done by means of pre-post test design. Norplant acceptors were treated as the case group while IUD acceptors were the control group. Cholesterol level, triglyceride, HDL, LDL, and ratio of cholesterol:HDL, side-effects and continuation of use were evaluated. RESULTS: The subjects were 91 Norplant and 89 IUD acceptors. Norplant acceptors showed the following study results: Total cholesterol showed a slight decrease (165.06-132.80 mg/dl), triglycerides were slightly increased (76.23-81.87), HDL showed a decrease (45.55-38.85), and so did LDL (105.75-78.55); the ratio of cholesterol:HDL remained constant (3.75-3.78) and all fraction levels of blood lipids were within the limit of tolerance and did not exceed the critical value. Normal menstrual blood flow remained constant, but heavy menstrual blood flow decreased. The cycle of normal menstruation was reduced and the inter-menstrual bleeding and the 2-3 month menstrual cycle were increased. Complaints of dizziness/headache, leucorrhea, and pain at insertion were all relatively few. There was no change of body weight and blood pressure. Continuation of use was 100%. CONCLUSIONS: The fraction of blood lipids found indicates varied results though blood lipids are still below critical values; it can be concluded that there is no risk of coronary heart disease. The continuation rate of Norplant use was high, due probably to side-effects counseling, and the social and cultural circumstances of acceptors.

Adult↗
PubMed1999

Effect of nondigestible oligosaccharides on large-bowel functions, blood lipid concentrations and glucose absorption in young healthy male subjects.

OBJECTIVE: To study the effect of the intake of 15 g nondigestible oligosaccharides per day on various parameters of large-bowel function, as well as on blood lipid concentrations and glucose absorption in man. DESIGN: Latin square, randomized, double-blind, diet-controlled. SETTING: Metabolic research unit. SUBJECTS: Twelve apparently healthy men (mean age 23 years), recruited from the Institute's pool of volunteers, no drop-outs. INTERVENTIONS: Four treatment periods of 3 weeks: inulin, fructo-oligosaccharides (FOS), galacto-oligosaccharides (GOS) and control; analyses of stool weight, intestinal transit, faecal pH, short-chain fatty acids, bile acids, faecal enzymes, blood lipids and glucose absorption. RESULTS: As compared to the control treatment: higher concentration of faecal acetate (inulin and GOS, P < 0.05) and valerate (inulin, P < 0.05), significantly lower concentration of faecal deoxycholic acid (inulin and FOS, P < 0.05 and P< 0.02, respectively) and beta-glucuronidase activity (inulin and GOS, P < 0.05 and P < 0.02 respectively). Other changes of faecal parameters and those of blood lipids and glucose absorption were statistically not significant. CONCLUSIONS: RESULTS indicate that nondigestible oligosaccharides are (partly) fermented in the human colon, but in healthy young men the effects are limited. Also the consumption of 15 g nondigestible oligosaccharides does not seem to alter blood lipid concentrations and glucose absorption in our young healthy adults.

Adult↗
PubMed2003

Relationship between birthweight and blood lipid concentrations in later life: evidence from the existing literature.

BACKGROUND: It has been suggested that there is a link between fetal growth and chronic diseases later in life. Several studies have shown a negative association between birthweight and cardiovascular diseases, as well as cardiovascular disease risk factors, such as blood pressure and type 2 diabetes. Far fewer studies have focused on the association between size at birth and blood lipid concentrations. We have conducted a qualitative assessment of the direction and consistency of the relationship between size at birth and blood lipid concentrations to see whether the suggested relationship between intrauterine growth and cardiovascular diseases is mediated by lipid metabolism. METHODS: A literature search covering the period January 1966 to January 2003 was performed using Medline, Embase, and Web of Science. All papers written in English and reporting the relationship between size at birth and lipid levels in humans were assessed. Bibliographies were searched for further publications. RESULTS: From an initial screen of 1198 references, 39 papers were included involving 28 578 individuals. There was no consistent relationship between size at birth and blood lipid levels; the one exception being triglyceride concentration, which showed statistically significant negative or U-shaped, but not positive, relationships with birthweight. CONCLUSION: This review does not strongly support a link between birthweight and blood lipid levels in later life. However, the research in this area is limited and in order to make any definitive conclusions, longitudinal studies with sufficient power, data, and prospective follow-up are needed.

Birth Weight↗
PubMed2005

The -250G-->A polymorphism in the human hepatic lipase gene promoter affects blood lipids in Chinese.

BACKGROUND: Human hepatic lipase (HL) is a glycoprotein that catalyzes the hydrolysis of triglycerides and phospholipids in all major classes of lipoproteins. We studied whether the hepatic lipase gene -250G(guanine)-->A(adenine) polymorphism affect blood lipids level and the coronary heart disease. METHODS: Two hundred and thirty subjects were included. Among them there were 122 patients with coronary heart disease and 108 subjects without coronary heart disease. Polymerase chain reaction-restricted fragments length polymorphism was used to determine HL genotype. RESULTS: The serum HDL-C level of HL-250A heterozygote (carriers of GA genotype) and homozygote (carriers of AA genotype) [(1.32+/-0.35) mmol/l] was significantly higher than wild type [carriers of GG genotype, (1.19+/-0.30) mmol/l, P<0.005]. This effect to blood lipids appears more evident in women (P<0.005). But the distribution of the 3 genotypes of HL-250 among the patients with coronary heart disease (GG54.1%, GA37.7%, AA8.2%) were similar with those of the control (GG54.6%, GA37.0%, AA8.4%, P>0.05). Both the male and the female had similar ratio for 3 HL genotypes. CONCLUSIONS: HL-250G-->A variation affects blood lipids profile and results in the increasing of the serum HDL-C level. This beneficial effect to blood lipids profile is more obviously seen in the female.

Aged↗
PubMed1996

Blood lipids, cardiovascular fitness, obesity, and blood pressure: the presence of potential coronary heart disease risk factors in adolescents.

OBJECTIVE: To identify and compare the presence of coronary heart disease (CHD) risk factors among 14- and 15-year-old boys and girls. DESIGN: For this cross-sectional study of 54 subjects, a blood sample taken after subjects fasted was used to determine total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and triglyceride concentrations. Dietary intake was estimated using a 24-hour recall and a 2-day food record. Height, weight, and skinfold thicknesses were measured to identify obese and severely obese subjects. Cardiovascular fitness, blood pressure, and cigarette use also were measured. TC, HDL-C, LDL-C, fitness, blood pressure, and smoking are modifiable risk factors, for CHD. SUBJECTS: Adolescents were selected by random sampling from lists of students attending public schools in two central Texas cities. Adolescents who were 14 or 15 years old; were not pregnant; and had no history of high blood pressure, diabetes, or heart disease were eligible to participate. STATISTICAL METHODS: Data were analyzed using Student's t and chi square tests. RESULTS: Of the subjects, 25% demonstrated two or more risk factors for CHD. A significantly higher percentage of girls than boys had a TC concentration greater than 5.2 mmol/L. Boys (n=29) had a mean fitness score that indicated a higher level of cardiovascular fitness than girls (n=25); however, the mean score for both groups was below average. CONCLUSION: Data provide support for increased interventions targeted toward lowering the risk factors for CHD and other chronic diseases in adolescents.

Adolescent↗
PubMed2005

Association of serum caffeine concentrations with blood lipids in caffeine-drug users and nonusers - results of German National Health Surveys from 1984 to 1999.

Previous studies regarding effects of caffeine on lipids focused mainly on coffee consumption, the real association of serum caffeine concentrations with blood lipids is unclear. 814 caffeine-drug users who had taken any caffeine/caffeine-containing pharmaceutical products and 623 nonusers without any drug use in the last seven days before the medical interview were identified from German National Health Surveys from 1984 to 1999. Serum caffeine concentrations were measured by using EIA for caffeine-drug users and nonusers in the same laboratory. Blood lipids were measured routinely for all survey participants. The association of caffeine concentrations with blood lipids was established by means of partial correlation analysis and regression analysis. After controlling for influence factors, caffeine concentrations were closely positively related to triglycerides in caffeine-drug users (male: r = 0.245, p < 0.001; female: r = 0.117, p = 0.018) and related to HDL-C in female nonusers (r = 0.245, p < 0.001). No associations were found between caffeine concentrations and total cholesterol and LDL-C levels in any groups of our study. Acute intake of caffeine might increase triglycerides levels especially in men while chronic intake of caffeine might be weakly but positively associated with HDL-C concentrations in women. The effects of caffeine on the pathogenesis of cardiovascular diseases should be further confirmed through epidemiological studies.

Adolescent↗
PubMed1976

Blood lipids during normal and early weaning in rats.

In young rats reared with their mothers, a gradual increase of serum cholesterol, triglycerides, phospholipids and total lipids was found between the 7th and the 18th to 22nd postnatal day. Then the concentrations of lipids gradually decrease. Early weaning at the 18th postnatal day causes a precocious decrease of the concentration of all studied lipids in blood so that their values on days 22 and 26 are significantly lower than in animals weaned on the 30th postnatal day. The body weight of early weaned rats decreases only slightly and returns to normal by the 30th day. The changes in serum lipids after early weaning are caused by differences in the amount of cholesterol and other lipids in breast milk, in comparison with those in the standard laboratory diet. Perhaps they may participate in disturbing the homeostatic equilibrium of cholesterol in early weaned rats.

Age Factors↗
PubMed1983

Blood lipids in middle-aged British men.

The concentrations of serum total cholesterol, high density lipoprotein-cholesterol, and triglycerides have been measured in 7735 men aged 40 to 59 years who were drawn from general practices in 24 towns in England, Wales, and Scotland. The distribution of these blood lipids, their interrelations and their association with age, social class, body mass index, cigarette smoking, alcohol intake, and physical activity at work have been examined. Body mass index emerges as the factor most strongly associated with these three blood lipids. Serum total cholesterol increased with increasing body mass index until about 28 kg/m2 but thereafter showed no further rise. The relation between body mass index and high density lipoprotein-cholesterol was negative and linear; that between body mass index and triglycerides was positive and linear. The inverse relation between high density lipoprotein-cholesterol and triglycerides was independent of the fact that both were related to body mass index. Alcohol intake was associated with increased high density lipoprotein-cholesterol concentrations and cigarette smoking with lowered high density lipoprotein concentrations; the association with alcohol appeared to be dominant. No significant trends with age were observed for the three blood lipids. In this population, body mass index is closely associated with the concentration of blood lipids but its effects are probably indirect and mediated by a complex of dietary and other factors.

Adult↗
PubMed1997

Cross-trait familial resemblance for body fat and blood lipids: familial correlations in the Quebec Family Study.

In an attempt to better understand the genetic basis of the metabolic syndrome, we have undertaken a series of studies on the familial aggregation in the clustering of the coronary heart disease risk factors which characterize this syndrome. In the present study, the hypothesis of shared genetic (pleiotropy) and/or environmental factors between body fat and blood lipids is investigated by examining cross-trait (eg, father's body fat with his son's blood lipid) familial resemblance between 4 indicators of body fat (body mass index [BMI], sum of 6 skin folds [SF6]) and fat distribution (the ratio of the trunk to extremity skin folds adjusted [TER-sf] and unadjusted [TER] for SF6), and 5 blood lipid variables (total cholesterol [CH], triglycerides [TG], cholesterol associated with high-density lipoproteins [HDL], the CH/ HDL ratio and the difference between CH and HDL [CH-HDL]) measured in 1239 individuals from 309 families participating in the Quebec Family Study. A bivariate correlation model was used to obtain maximum likelihood estimates of cross-trait spouse, parent-offspring, and sibling correlations after adjustment of body fat and lipid data for the effects of age, separately in the four sex-by-generation groups. Likelihood ratio tests revealed the presence of significant (P < .05) cross-trait resemblance between body fat (BMI and SF6) and all lipid traits except CH and also between fat distribution (TER and TER-sf) and CH/HDL and CH-HDL. Only sibling cross-trait correlations were significant for all body fat-lipid pairs of measures, with bivariate familiality estimates (i.e., shared genetic and/or environmental factors) ranging from 8% to 40%. Although the hypothesis of genetic pleiotropy cannot be ruled out from the pattern of cross-trait correlations found in the present study, we conclude that environmental factors shared within sibships are probably more important than common genes in determining the covariation between body fat and blood lipids.

Adolescent↗
PubMed2005

Effects of conjugated linoleic acid supplementation on blood lipids and adiposity of rats fed diets rich in saturated versus unsaturated fat.

Conjugated linoleic acid (CLA) may decrease adiposity and improve blood lipid profiles under some conditions. The goal of this study was to determine the effects of CLA supplementation on blood lipid profiles and adiposity of rats fed a diet containing a primarily saturated fat versus a diet containing a primarily unsaturated fat. Twenty-eight male Sprague-Dawley rats were randomly assigned to one of four diets containing coconut oil, coconut oil with CLA, corn oil or corn oil with CLA. After 28 days, blood was collected and serum concentrations of total cholesterol (TC), HDL-cholesterol (HDL-C), and triacylglycerols (TG) were assessed. Food intake, body weights, and epididymal fat pads were measured. No significant differences (p>0.05) were noted among groups for amount of food consumed, weight gained, food efficiency ratio or serum TG concentrations. TC concentrations were lower (p<0.05) in the CLA-supplemented rats that were fed coconut oil but not those consuming corn oil. Serum HDL-C was lower (p<0.05) in rats consuming corn oil but was not significantly different (p>0.05) for CLA supplemented groups. Epididymal fat pads weighed significantly more (p<0.05) in the coconut oil fed group compared to the corn oil fed group, but there was no significant difference (p>0.05) between the corn oil and coconut oil + CLA group. Overall, this study suggests that CLA is more beneficial for control of blood lipids and adiposity when supplemented to a diet rich in saturated versus unsaturated fat.

Adipose Tissue↗
PubMed1983

Intestinal absorption of fatty acids, and blood lipid composition in sheep.

Interrelationships between intestinal uptake of fatty acids and their concentrations in lipids of blood plasma of sheep were assessed by quantities of individual fatty acids that flowed through and were absorbed from the intestinal tract under different dietary conditions. Major long-chain fatty acids were approximately 90% digested, thus demonstrating that dietary fatty acids of high melting points can be absorbed efficiently by ruminants provided they are well dispersed. Relationships were linear between uptakes of 16:0, 18:0, 18:1, and 18:2 fatty acids from the gut and their concentrations in both triglycerides and triglyceride-free plasma lipids. The proportion of each transferred to triglyceride-free plasma lipids was in order 18: 2 greater than 18:1 greater than 16:0 greater than 18:0, whereas in plasma triglycerides the order was 16:0 = 18:0 = 18:2 less than 18:1. Interconversion of 18:0 to 18:1 by intestinal mucosa may explain the anomalous behavior of 18:1 triglycerides. These results are consistent with the hypothesis that the intrinsic nature of the fatty acid primarily determines the composition of triglyceride-free plasma lipids whereas the relative amount of each acid absorbed by the intestine determines that of plasma triglycerides and, hence, of milk and depot fats of ruminants.

Animals↗
PubMed1996

Blood lipid docosahexaenoic and arachidonic acid in term gestation infants fed formulas with high docosahexaenoic acid, low eicosapentaenoic acid fish oil.

The effect of fish oil high in docosahexaenoic acid (22:6n-3) and low in eicosapentaenoic acid (20:5n-3) in formula on blood lipids and growth of full-term infants was studied. Infants were fed formula with about 15% oleic acid (18:1), 32% linoleic acid (18:2n-6), 4.9% linolenic acid (18:3n-3) and 0, 0.10, or 0.22% 22:6n-3, or 35% 18:1, 20% 18:2n-6, 2.1% 18:3n-3 and 0, 0.11, or 0.24% 22:6n-3 from 3 d to 16 wk of age (n = 16,18,17,21,17,16, respectively). The formulae had < 0.1% 20:5n-3 and no arachidonic acid (20:4n-6). Breast-fed infants (n = 26) were also studied. Plasma phospholipid and red blood cell (RBC) phosphatidylcholine (PC) and phosphatidylethanolamine (PE) fatty acids were determined at 3 d and 4, 8, and 16 wk of age. These longitudinal analyses showed differences in blood lipid 22:6n-3 between breast-fed and formula-fed infants depending on the feeding duration. At 16 wk, infants fed formula with 0.10, 0.11% 22:6n-3, or 0.22% 22:6n-3 had similar 22:6n-3 levels in the plasma phospholipid and RBC PC and PE compared with breast-fed infants, and higher 22:6n-3 than infants fed formula without 22:6n-3. Formula with 0.24% 22:6n-3, however, resulted in higher plasma phospholipid 22:6n-3 than in breast-fed infants at 16, but not 4 or 8 wk of age. Plasma and RBC phospholipid 20:4n-6 was lower in formula-fed than breast-fed infants, but no differences in growth were found. Higher blood lipid C20 and C22 n-6 and n-3 fatty acids in infants fed formula with 20% 18:2n-6 and 2.4% 18:3n-3 compared with 32% 18:2n-6 and 4.9% 18:3n-3 show the increase in blood lipid 22:6n-3 in response to dietary 22:6n-3 depending on other fatty acids in the formula.

Arachidonic Acid↗