The metabolic syndrome of ω3-depleted rats. II. Body weight, adipose tissue mass and glycemic homeostasis

血糖性 脂肪组织 平衡 葡萄糖稳态 癌基因 内分泌学 分子医学 内科学 医学 生物 代谢综合征 肥胖 癌症 糖尿病 生理学 细胞周期 胰岛素抵抗
作者
Abdullah Sener,Ying Zhang,Nurdan Bulur,Karim Louchami,Willy Malaisse,Yvon Carpentier
出处
期刊:International Journal of Molecular Medicine [Spandidos Publications]
卷期号:24 (01) 被引量:24
标识
DOI:10.3892/ijmm_00000215
摘要

Exposure of 7-week-old normal rats for 3-7 months to a diet deprived of long-chain polyunsaturated omega3 fatty acids was recently reported to induce changes in the fatty acid content and pattern of liver phospholipids and triglycerides similar to those otherwise found in second generation omega3-depleted rats. In the present study, the changes in body weight, parametrial adipose tissue mass, plasma glucose and insulin concentrations and insulin resistance index were investigated in the same control and omega3-depleted rats, which were then given access for 2 to 4-5 weeks to either a flaxseed oil-enriched diet (control and omega3-depleted rats) or a soybean oil-enriched diet (control rats). The body weight failed to differ between control and omega3-depleted rats. The latter rats, however, displayed increases in adipose tissue mass, plasma glucose and insulin concentrations, and insulin resistance index. In the control rats given access to the soybean or flaxseed oil-enriched diet, body weight and adipose tissue mass were little affected, but both the plasma glucose concentration and insulin resistance index decreased. In the omega3-depleted rats given access to the flaxseed oil-enriched diet, both body weight and adipose tissue mass underwent a rapid, pronounced and sustained increase, whilst the plasma glucose concentration and insulin resistance index decreased similarly to those in the control rats. The present design of omega3 fatty acid dietary deprivation thus reproduces the visceral obesity and insulin resistance otherwise observed in second-generation omega3-depleted rats. However, the supply of exogenous omega3 fatty acids to the omega3-depleted rats failed to oppose visceral obesity, possibly as a result of the orexigenic effects of these omega3 fatty acids.
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