JCEM:胰岛素与雌二醇独立减少健康男性营养素摄入量

2018-01-14 MedSci MedSci原创

众所周知胰岛素对中枢神经系统的作用抑制了食物摄入,但是与男性生物相比,这种作用在女性中发现并不明显。目前已经提出这种性别特异性模式是由于雌激素信号传导对胰岛素作用的调节影响而产生的。近日在JCEM上发表的一篇文章则在健康的年轻男性中评估用透皮雌二醇进行的预处理是否与通过鼻内途径施用中枢神经胰岛素的食欲抑制作用相互作用。

众所周知胰岛素对中枢神经系统的作用抑制了食物摄入,但是与男性生物相比,这种作用在女性中发现并不明显。目前已经提出这种性别特异性模式是由于雌激素信号传导对胰岛素作用的调节影响而产生的。近日在JCEM上发表的一篇文章则在健康的年轻男性中评估用透皮雌二醇进行的预处理是否与通过鼻内途径施用中枢神经胰岛素的食欲抑制作用相互作用。

根据2×2设计,两组男性(每组n = 16)接受3天透皮雌二醇(100μg/ 24小时)或安慰剂预处理,并且在两个单独的早晨鼻内施用160IU常规人胰岛素或安慰剂。研究人员通过丰富的自助早餐和早餐前后采集的样本中的相关血液参数评估了自由选择的随意卡路里摄入量。

研究结果显示雌激素治疗诱导血清雌二醇浓度增加3.5倍,血清睾酮浓度降低70%。与雌二醇给药无关,鼻内胰岛素在早餐期间减少了碳水化合物的摄入量,特别是减少甜味可口食物的摄入量。雌二醇治疗本身减少蛋白质消耗。研究人员没有发现两种激素之间与饮食有关的相互作用的指标。

结果表明在急性情况下,在控制健康男性的饮食行为中,雌激素不与中枢神经胰岛素信号相互作用。胰岛素和雌二醇对大量营养素摄入量具有独立的抑制作用。

原始出处:Rosemarie Krug.et al. Insulin and Estrogen Independently and Differentially Reduce Macronutrient Intake in Healthy Men.J Clin Endocrinol Metab. 2017.

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    2018-07-08 baoya
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    2018-08-07 smallant2015
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    2018-11-03 achengzhao
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    2018-04-23 lmm397
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    2018-01-16 hxzhang
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