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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- "Atherosclerosis or fatty liver disease is caused mainly by hyperlipidemia in animal models. An HF/HC diet is often used to induce a fatty liver disease model in Sprague Dawley or Wistar rats for evaluation of drug and lipid metabolism [15, 16]. However, these rat models have some limitations in pathological practice. "
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: 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. · 2.37 Impact Factor
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ABSTRACT: We aimed to verify the beneficial effects of probiotic strain Lactobacillus reuteri 263 (Lr263) on hypolipidemic action in hamsters with hyperlipidemia induced by a 0.2% cholesterol and 10% lard diet (i.e., high-cholesterol diet (HCD)). Male Golden Syrian hamsters were randomly divided into two groups: normal (n = 8), standard diet (control), and experimental (n = 32), a HCD. After a two-week induction followed by a six-week supplementation with Lr263, the 32 hyperlipidemic hamsters were divided into four groups (n = 8 per group) to receive vehicle or Lr263 by oral gavage at 2.1, 4.2, or 10.5 × 109 cells/kg/day for 6 weeks, designated the HCD, 1X, 2X and 5X groups, respectively. The efficacy and safety of Lr263 supplementation were evaluated by lipid profiles of serum, liver and feces and by clinical biochemistry and histopathology. HCD significantly increased serum levels of total cholesterol (TC), triacylglycerol (TG) cholesterol, high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C), LDL-C/HDL-C ratio, hepatic and fetal TC and TG levels, and degree of fatty liver as compared with controls. Lr263 supplementation dose dependently increased serum HDL-C level and decreased serum TC, TG, LDL-C levels, LDL-C/HDL-C ratio, hepatic TC and TG levels, and fecal TG level. In addition, Lr263 supplementation had few subchronic toxic effects. Lr263 could be a potential agent with a hypolipidemic pharmacological effect.Nutrients 05/2015; 7(5):3767-82. DOI:10.3390/nu7053767 · 3.27 Impact Factor