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Dehydroepiandrosterone prevents age-associated alterations, increasing insulin sensitivity

机译:脱氢表雄酮可预防与年龄有关的改变,增加胰岛素敏感性

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The age decline in DHEA levels has been associated with the appearance of age-related disorders such as obesity and insulin resistance. The aim of this study was to analyse the effect of chronic administration (13 weeks) of DHEA (5 g/kg diet) to old female rats fed on a high-fat diet on body weight and adiposity, and concretely on the expression of the adipokines related to obesity and insulin resistance, such as leptin, adiponectin and resistin. DHEA treatment induced a decrease in body weight, adipose tissue mass and serum insulin, adiponectin and leptin levels. Adiponectin mRNA expression in visceral fat depots decreased with aging, but this reduction was attenuated by DHEA treatment. DHEA treatment also stimulated resistin gene expression in the ovaric and renal adipose depots, which is associated with an increase in its circulating levels. In conclusion, DHEA treatment decreases body weight and adiposity in old female rats fed a high-fat diet, leading to an improvement of the HOMA index for insulin sensitivity, with decreasing circulating insulin levels, and preventing the age-associated decline of visceral-adipose adiponectin expression.
机译:脱氢表雄酮(DHEA)水平的年龄下降与年龄相关疾病的出现有关,例如肥胖和胰岛素抵抗。这项研究的目的是分析DHEA(5 g / kg饮食)长期给药(13周)对高脂饮食喂养的成年雌性大鼠的体重和肥胖的影响,尤其是对与肥胖和胰岛素抵抗有关的脂肪因子,例如瘦素,脂联素和抵抗素。 DHEA治疗可导致体重,脂肪组织质量以及血清胰岛素,脂联素和瘦素水平降低。内脏脂肪储库中脂联素mRNA的表达随着年龄的增长而下降,但是这种减少因DHEA处理而减弱。 DHEA处理还刺激了卵巢和肾脏脂肪库中抵抗素基因的表达,这与其循环水平的升高有关。总之,DHEA治疗可降低高脂饮食的老年雌性大鼠的体重和肥胖,从而改善胰岛素敏感性的HOMA指数,同时降低循环胰岛素水平,并防止与年龄相关的内脏脂肪减少。脂联素表达。

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