[Study on animal models for hyperlipidemia].
ABSTRACT To establish a better animal model for hyperlipidemia, three animal models with SD rats, Wistar rats and golden hamsters were explored. The semi-purified diet for rats was composed of 1% cholesterol, 10% lard, 10% yolk powder and 79% normal diet. The semi-purified diet for hamster was composed of 0.2% cholesterol, 15% lard and 85% normal diet. Serum TC, TG, HDL-C, liver cholesterol and triglyceride were assayed. Serum TG of SD rat, Wistar rat and hamster was 194.4%, 86.2% and 84.3% respectively higher than that of control after 5 weeks of experiment. Serum TC of the three groups was 76.8%, 48.3% and 134.8% respectively higher than that of control. The results suggested that hamster might be a better animal model for hypercholesterolemia and SD rat might be better for hypertriglyceridemia.
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ABSTRACT: To assess the effects of soy protein, isoflavone, and saponin on liver and blood lipid in rats that consumed high-cholesterol diets. High-cholesterol diets (1%) with or without soy material were fed to 6-wk-old male Sprague-Dawley rats for 8 wk. Blood lipids, liver lipids, glutamic oxaloacetic transaminase (GOT), and glutamic pyruvic transaminase (GPT) levels were measured. The in vitro bile acid-binding ability of soy materials was analyzed. The results of in vitro studies showed that soy protein isolate had a significantly higher bile acid-binding ability (8.4+/-0.8%) than soy saponin (3.1+/-0.7%) and isoflavone (1.3+/-0.4%, P<0.05). On the other hand, at the end of the experimental period, rats that consumed soy protein diets had lower GOT and GPT levels than rats that consumed casein under high-cholesterol diets. Rats that consumed soy protein also had lower total cholesterol (TC) levels in the liver than those that consumed casein under high-cholesterol diets. Rats that consumed the soy protein diet containing both saponin and isoflavone had lower hepatic TC level than those that consumed the soy protein diet without isoflavone alone. The effect of different types of proteins on triglyceride was not significant. Consumption of soy provided benefits to control lipid levels under high-cholesterol dieting conditions in this rat model of hypercholesterolemia. The major component that reduced hepatic TC was not saponin, but possibly isoflavone.World Journal of Gastroenterology 10/2005; 11(35):5549-52. · 2.43 Impact Factor
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ABSTRACT: The objective of this work was to establish a novel Mongolian gerbil (Meriones unguiculatus) hyperlipidemia model and to investigate its susceptibility genetic basis. Two rodent (gerbil and rat) hyperlipidemia models were induced by feeding a high fat/high-cholesterol (HF/HC) diet. There were significant increases of serum total cholesterol, triglycerides, low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) in gerbils within a 4-week modeling period. About 10-30% of >8-month-old individuals developed hyperlipidemia spontaneously. The apolipoprotein E (ApoE) gene was cloned by merging a sequence of rapid amplification of cDNA ends (RACE) and nested polymerase chain reaction products. The results revealed an open reading frame of 948 bp, encoding a protein of 298 amino acids. The gene without a 5'-UTR region in the first intron was highly homologous to human Apo-A-I and rat Apo-A-IV. The distribution of expression of the ApoE gene in liver, brain, heart, lung, kidney, and adrenal gland was detected by an ABC immunohistochemical procedure. Three single nucleotide polymorphisms (SNPs; C97T, G781T, and A1774T) were first found using PCR-single-strand conformation polymorphism (PCR-SSCP) in a closed population containing 444 animals. Correlation analysis confirmed that new SNPs , age, and gender were associated significantly (P < 0.05) with hyperlipidemia.BioMed Research International 06/2014; 2014:410480. DOI:10.1155/2014/410480 · 2.71 Impact Factor
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ABSTRACT: Ovariectomized Sprague-Dawley (SD) and Wistar rats are widely used as animal models for postmenopausal osteoporosis. This study aimed to investigate differences in the long-term effects of ovariectomy on these two breeds of rats. 6-month-old SD and Wistar rats underwent sham operation (Ssham and Wsham) or bilateral ovariectomy (Sovx and Wovx). Body weight, absolute fat, fifth and sixth lumber vertebrae (L5-6) bone mineral density (BMD), and whole body bone mineral content (BMC) were evaluated from 14to 68 weeks after operation. Body weight significantly increased compared to shams at every point (except 68 weeks) for Sovx and at 14, 21 and 38 weeks for Wovx (all P < 0.05), the increases were not significantly different between breeds. Absolute fat increased significantly compared to shams at every point (except 14 and 68 weeks) for Sovx and at 30 weeks for Wovx (all P < 0.05), the increases were significantly different between Sovx and Wovx (P = 0.007), but not the shams. L5-6 BMD increased then decreased and was significantly lower than shams at 30, 38 and 50 weeks for Sovx and at 14 weeks for Wovx (all P < 0.05), the initial increases were significantly different between Sovx and Wovx (P = 0.006), but not the shams. BMC was significantly decreased compared to sham groups at every point (except 14 and 68 weeks) for Sovx and at 14, 21, 38, and 50 weeks for Wovx (all P < 0.05), the decreases were not significantly different between breeds. In conclusion, ovariectomy had a greater effect upon absolute fat and L5-6 BMD in SD rats.International journal of clinical and experimental pathology 01/2015; 8(2):1491-502. · 1.78 Impact Factor