Animals ; Aorta ; pathology ; Atherosclerosis ; blood ; etiology ; metabolism ; Chemokine CCL2 ; metabolism ; Cholesterol ; blood ; Cholesterol, Dietary ; administration & dosage ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; Dehydroepiandrosterone ; pharmacology ; Diet, Atherogenic ; Immunohistochemistry ; Rabbits ; Random Allocation ; Triglycerides ; blood ; Vascular Cell Adhesion Molecule-1 ; metabolism

OBJECTIVETo investigate the dietary phytosterol intake of elderly women in three different cities of China, and to compare the main dietary sources, so that to discuss the relationship of dietary phytosterol intake and serum lipids.

METHODSBased on the dietary pattern, women more than 50 years old from Beijing, Hefei and Urumchi were chosen as testers, 80 - 100 people for each city respectively. The dietary survey was done by continues 24 hours review of two days, the plant food were collected and the phytosterol content (include beta-sitosterol, campesterol, stigmasterol, sitostanol) were analyzed by GC methods, the total phytosterols content were calculated. The dietary phytosterol intake were calculated and serum lipids were also analyzed in all the testers.

RESULTSTesters from Beijing, Hefei and Urumchi were 100, 101 and 84 respectively. The average dietary phytosterol intake of people in Beijing and Hefei were 340.3 mg/d and 313.5 mg/d, the main sources were plant oil and cereals, while the average dietary phytosterol intake of people in Urumchi were 550.4 mg/d, higher than the other two cities (t values were 9.369, 10.420, respectively, both P values < 0.01), the main source in Urumchi was cereal (provide 53.1% of the total phytosterol intake). The laboratory results showed, testers in Urumchi had significantly lower serum TC content ((4.04 +/- 0.78) mmol/L) than that in Beijing ((4.89 +/- 0.91) mmol/L) and Hefei ((4.71 +/- 0.83) mmol/L) (t value were 6.766 and 5.401 respectively, both P values < 0.01); serum TG content in Urumchi((1.01 +/- 0.48) mmol/L) was also lower than that in Beijing ((1.31 +/- 0.53) mmol/L) and Hefei ((1.66 +/- 0.75) mmol/L) (t values were 3.343 and 7.293 respectively, both P values < 0.01); the serum glucose is also lower in testers in Urumchi ((5.02 +/- 2.18) mmol/L) compared with testers in Beijing ((5.69 +/- 1.53) mmol/L, t = 2.561, P < 0.05) and Hefei ((5.78 +/- 1.53) mmol/L, t = 2.934, P < 0.01).

CONCLUSIONDifferent dietary pattern result in significantly different dietary phytosterol intake in elder women in three cities, higher, phytosterol intake seemed to contribute to lower serum lipids.

Aged ; Aged, 80 and over ; China ; Cholesterol ; analogs & derivatives ; blood ; Cholesterol, Dietary ; metabolism ; Female ; Humans ; Lipids ; blood ; Middle Aged ; Phytosterols ; blood ; metabolism ; Sitosterols ; blood ; Urban Population

Animals ; Bile Acids and Salts ; metabolism ; Cholelithiasis ; physiopathology ; Cholesterol ; metabolism ; Cholesterol, Dietary ; administration & dosage ; Feces ; chemistry ; Female ; Gallbladder ; physiopathology ; Guinea Pigs ; Myoelectric Complex, Migrating

OBJECTIVE: To explore the effect of niacin on the serum adiponectin concentration in hypercholesterolemia rabbit and the adiponectin concentration secreted by adipocytes in normal rabbits. METHODS: Ten male New Zealand white rabbits fed with high cholesterol diet for 8 weeks were randomly divided into 2 groups: (1) The high cholesterol group maintained a high cholesterol diet for 8 weeks. (2) The same cholesterol diet plus niacin (0.4g/kg*d ) were administrated for 6 weeks in the niacin group. A control group was fed with normal diet for 14 weeks. Subcutaneous adipose from the control group was collected for adipocyte culture. Matured adipocytes were incubated with various concentrations of niacin (0, 0.25, 0.5, 1.0, and 2.0micromol/L). Adiponectin concentrations in the serum and adipocyte culture supernatant were measured by enzyme-linked-immunosorbent assay. RESULTS: Compared with the control group, rabbits in the high cholesterol group showed higher serum levels of total cholesterol, and low density lipoprotein cholesterol (LDL-C), all of which were significantly reduced by niacin treatment (P<0.01),and serum high density lipoprotein-cholesterol (HDL-C) significantly increased (P<0.01). At 8th week, the mean adiponectin concentration of rabbits fed with high cholesterol diet was significantly lower than that of the control group[(1.268+/-0.039)mg/L vs.(1.449+/-0.107)mg/L,P<0.01]. Niacin treatment significantly elevated the serum adiponectin level which was positively related to HDL-C,and negatively related to TC and LDL-C. Cell experiment in vitro indicated that niacin could significantly induce the adiponectin secretion of adipocytes in a dose-dependent manner. CONCLUSION Niacin can significantly promote the adiponectin secretion of adipocytes, suggesting that niacin probably has an ability of elevating the serum adiponectin level in addition to lipid-lowering effect.
Adipocytes ; cytology ; drug effects ; metabolism ; Adiponectin ; blood ; metabolism ; Animals ; Cholesterol ; blood ; Cholesterol, Dietary ; administration & dosage ; toxicity ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; Dose-Response Relationship, Drug ; Hypercholesterolemia ; blood ; etiology ; prevention & control ; Hypolipidemic Agents ; pharmacology ; Male ; Niacin ; pharmacology ; Rabbits ; Random Allocation

BACKGROUND/OBJECTIVES: We examined the hypoglycemic and anti-hyperlipidemic effect of yeast hydrolysate (YH) enriched with Cyclo-His-Pro (CHP) in the C57BL/6J ob/ob mouse model. MATERIALS/METHODS: Mice were separated into 4 groups (8 mice/group) on the basis of blood glucose and body weight: WT control, lean mice given vehicle; ob/ob control, ob/ob mice given vehicle; YH-1, ob/ob mice given 0.5 g/kg of YH; YH-2, ob/ob mice given 1 g/kg of YH. YH in saline or vehicle was administered orally in the same volume every day for 3 weeks. RESULTS: Mice treated with YH (0.5 and 1 g/kg) for 3 weeks displayed a significant reduction in overall body weight gain and perirenal and epididymal adipose tissue weight compared to the ob/ob control group. Additionally, high-density lipoprotein (HDL) cholesterol, glucose, and atherogenic indexes were significantly decreased in the blood of YH-1 and YH-2 groups compared to the ob/ob control. In ob/ob mice, YH administration significantly improved glucose tolerance and blood insulin levels. These data indicate that YH treatment produces potent hypoglycemic and anti-hyperlipidemic effects by controlling body weight, fat mass, blood lipid, insulin levels, and glucose tolerance. CONCLUSION: YH could potentially be used as a treatment option for diabetes and hyperlipidemia. The CHP-enriched YH may be a promising strategy in the development of hypoglycemic peptide nutraceuticals.
Adipose Tissue ; Animals ; Blood Glucose* ; Body Weight ; Cholesterol ; Diabetes Mellitus ; Dietary Supplements ; Glucose ; Hyperlipidemias ; Insulin ; Lipid Metabolism* ; Lipoproteins ; Mice* ; Yeasts*

This study investigated the effects of xylooligosaccharide on feces bifidobacteria proliferation, lactic acid concen-tration and lipid metabolism in healthy woman. Fourteen volunteers were randomly assigned to 2 groups : 1.4 g/day xylooligosaccharide intake group, 2.8 g/day xylooligosaccharide intake group. The duration of the study was 28 days. The amount of feces and excretion time were not affected by xylooligosaccharide intake. The color of feces changed to yellow brown, and hardness of stool and effort to evacuation were reduced by xylooligosaccharide intake. Xylooligo-saccharide intake reduced the fecal pH significantly after 14 days in 2.8 g/day intake group (p <0.05 ). The number of fecal bifidobacteria were significantly increased after 28 days in 1.4 g/day intake group (p <0.05 ), and in 2.8 g/day in-take group, the number of fecal bifidobacteria significantly increased after 14 days (p <0.05 ). Water contents of feces were not affected by xyloolgosacchride intake. The fecal triglyceride and cholesterol concentrations were increased in 2.8 g/day intake group (p <0.05 ), and in 1.4 g/day intake group, fecal cholesterol concentration only was increased (p <0.05 ). The fecal lactic acid concentration was significantly increased in 2.8 g/day intake group (p <0.05 ). Serum trigly-ceride, cholesterol and glucose concentration were significantly decreased in 2.8 g/day intake group (p <0.05 ). In conclusion, xylooligosaccharide dietary supplementation may be beneficial to gastrointestinal health and lipid metabolism, and 2.8 g/day intake was more effective than 1.4 g/day intake.
Cholesterol ; Dietary Supplements ; Feces ; Female ; Glucose ; Hardness ; Humans ; Hydrogen-Ion Concentration ; Lactic Acid ; Lipid Metabolism* ; Triglycerides ; Volunteers

Animals ; Aorta ; metabolism ; pathology ; Atherosclerosis ; etiology ; metabolism ; pathology ; Cholesterol, Dietary ; Male ; Matrix Metalloproteinase 2 ; metabolism ; PPAR gamma ; agonists ; Rabbits ; Random Allocation

Butylated hydroxytoluene (BHT) can inhibit experimental atherosclerosis in animals. Although the agent is an antioxidant, the exact mechanism of the reaction in atherosclerosis is still unknown. To investigate the effects of BHT on expression of P-selectin (PADGEM, GMP-140), intercellular adhesion molecule-1 (ICAM-1) and class II MHC (Ia) antigen, we proposed an experiment on rats. Male rats (n=18 per group) were fed either a normal cholesterol control diet, a normal cholesterol diet containing 0.5% BHT (BD), a high cholesterol diet containing 1.5% cholesterol and 0.1% sodium cholate (CD), or the CD diet containing 0.5% BHT (BCD). Rats were sacrificed after 3 days, and after 1, 2, 4, 10, and 17 weeks of dietary treatment. Although there was no gross or light microscopic atherosclerotic lesions, scanning electron microscopy revealed monocytic adhesion to aortic endothelium and mild endothelial injuries in CD and BCD groups. Immunohistochemically, the addition of BHT to a high cholesterol diet inhibited P-selectin expression but not in ICAM-1 and Ia antigen. These findings suggest that in rats, high cholesterol diets induce expression of ICAM-1, P-selectin and Ia antigen. In addition, the antiatherogenic effect of BHT may play a role in the inhibition of P-selectin.
Animal ; Antioxidants/pharmacology ; Antioxidants/metabolism* ; Aorta, Abdominal/ultrastructure ; Aorta, Abdominal/pathology ; Aorta, Thoracic/ultrastructure ; Aorta, Thoracic/pathology ; Butylated Hydroxytoluene/pharmacology ; Butylated Hydroxytoluene/metabolism* ; Cholesterol/metabolism ; Cholesterol, Dietary/metabolism* ; Male ; Microscopy, Electron, Scanning ; P-Selectin/biosynthesis* ; Rats ; Rats, Sprague-Dawley

OBJECTIVEThe present study was designed to investigate the preventive and therapeutic effect of 3-hydroxy-3-methylglutanyl coenzyme A (HMG-CoA) reductase inhibitor fluvastatin on the development of atherosclerosis (AS) in immature rabbits and its possible mechanism by detecting the expression level of lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) in the abdominal aorta.

METHODSA model of hypercholesterolemia (HC) was established by high-cholesterol diet and 24 immature rabbits were divided randomly and equally into control group, HC-diet group and fluvastatin group. At the beginning of the study and after 12 weeks, the body height (BH) and body weight (BW) of the rabbits were measured and their body mass index (BMI) was calculated. At the end of 12 weeks, serum total cholesterol (TC) and low-density lipoprotein (LDL) levels were examined. The intima-medial thickness of the abdominal aorta (aIMT) was measured by using non-invasive high-resolution (14 MHz) B-mode ultrasound imaging. Histological changes in abdominal arteries were studied by H&E-staining and histomorphometric analysis. The gene expression of LOX-1 in abdominal aorta was evaluated by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) and its protein expression was examined by immunohistochemistry.

RESULTSHigh cholesterol diet induced hypercholesterolemia and early AS in immature rabbits. In HC-diet group serum TC and LDL levels in rabbits elevated. B mode echocardiography showed that aIMT was thickened and pathomorphology indicated that extensive aortic intima (I) and intima and media (I + M) became thickened and the ratio of the area of intima to media (S(I)/S(M)) was increased. Aortic intimal proliferation in HC-diet group was associated with a marked increase in LOX-1 expression (protein and mRNA) in endothelium and neointima of the abdominal aorta. Treatment with fluvastatin at a dosage of 10 mg/(kg.d) deduced serum lipid, attenuated artery intimal proliferation and markedly decreased the enhanced LOX-1 expression level in endothelium and neointima in immature rabbits. There were no significant differences of BH, BW or BMI among the three groups.

CONCLUSIONSThese findings suggested that early treatment with fluvastatin not only induced a significant regression of arterial lesions of HC and early AS in immature rabbits, but also had a crucial endothelial protective effect by down-regulating LOX-1 expression level in atherosclerotic arteries in early AS.

Animals ; Aorta, Abdominal ; diagnostic imaging ; pathology ; Arteries ; metabolism ; pathology ; Atherosclerosis ; drug therapy ; metabolism ; Cholesterol, Dietary ; Cholesterol, LDL ; blood ; Echocardiography ; Fatty Acids, Monounsaturated ; pharmacology ; Hydroxymethylglutaryl-CoA Reductase Inhibitors ; pharmacology ; Hypercholesterolemia ; drug therapy ; metabolism ; Indoles ; pharmacology ; Rabbits ; Scavenger Receptors, Class E ; metabolism

OBJECTIVE: To explore the expression of CyPA and CD147 in rabbit models of vulnerable carotid atherosclerotic plaque and the therapeutic effect of atorvastatin.
 METHODS: Twenty-four male New Zealand rabbits were randomly divided into 3 groups. Eight rabbits were served as a normal diet group (Group A), and the remaining 16 rabbits underwent balloon-induced endothelial injury in the right carotid artery and thereafter were fed on high-cholesterol diet (1% cholesterol) for 12 weeks, then they were divided into 2 groups: a AS group (Group B), an atorvastatin group [Group C, 2.5 mg/(kg.d)]. 4 weeks later, plaque disrupture was triggered by China Russell's viper venom and histamine. Serum levels of TC, TG, LDL-C and HDL-C were measured at different timepoint. The damaged carotid arteries were collected to undergo pathological examination. The macrophage, expression of CyPA and CD147 were detected by immuno-histochemical analysis, and the mRNA levels of CyPA and CD147 were examined by reverse transcription polymerase chain reaction (RT-PCR).
 RESULTS: Compared with the Group A, the serum levels of TC and LDL-c in the Group B and Group C were significantly increased (all P<0.01). Compared with the Group B, the serum levels of TC and LDL-c in the Group C were reduced significantly after atorvastatin intervention for 4 weeks (all P<0.01). The plaques disruption and thrombosis occurred in 4 out of the 6 rabbits in the Group B, while only 1 rabbit demonstrated plaques disruption and thrombosis in the Group C. Compared with the Group B, the levels of CyPA, CD147 and macrophage in carotid atherosclerotic plaque in the Group C were decreased significantly (all P<0.01).
 CONCLUSION The up-regulation of CyPA and CD147 may be involved in pathogenesis of vulnerable carotid atherosclerotic plaque. Atorvastatin could stabilize the plaque through inhibiting the CyPA and CD147 expression.
Animals ; Atorvastatin ; pharmacology ; Basigin ; metabolism ; Carotid Artery, Common ; pathology ; Cholesterol ; blood ; Cholesterol, Dietary ; administration & dosage ; Cyclophilin A ; metabolism ; Macrophages ; cytology ; Male ; Plaque, Atherosclerotic ; drug therapy ; metabolism ; Rabbits ; Random Allocation ; Thrombosis ; pathology ; Triglycerides ; blood