新皮质对食物限制的性别特异性弹性
Zahid Padamsey1,2, Danai Katsanevaki2,3, Patricia Maeso2
1Wellcome-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom.
eLife
|July 8, 2024
概括
与雌性不同的是,雄性小鼠对食物限制有显著的大脑能量适应. 女人的大脑保持功能和能源使用,突出性别特异性在稀缺期间新皮质的弹性.
科学领域:
- 神经科学是一个神经科学.
- 代谢适应 代谢适应
- 在生理学的性别差异.
背景情况:
- 哺乳动物在食物稀缺期间表现出性别特异的节能策略,主要记录在外围组织中.
- 大脑对能量限制的适应,特别是高能耗大脑的基于性别的差异,仍未得到充分探索.
研究的目的:
- 调查食物限制对成年雄性和雌性小鼠初级视觉皮层 (V1) 的能量使用和功能的影响.
- 为了确定大脑对热量不足的反应中性别特异的分子和功能适应.
主要方法:
- 在受食物限制的雄性和雌性小鼠的初级视觉皮层 (V1) 中利用分子分析和RNA测序.
- 评估V1腺三酸盐 (ATP) 的使用和视觉编码精度 (定向选择性).
- 测量了血清瘦素水平作为节能适应的关键调节剂.
主要成果:
- 在男性V1中,食物限制调节了规范能量调节通路 (AMP激活蛋白激酶,PPAR-alpha,mTOR,氧化酸化),但在女性V1.1中没有.
- 雌性V1表现出性,尽管有食物限制,但ATP使用或视觉编码精度没有显著变化.
- 限制饮食的男性表现出血清瘦素的降低,这是节能适应的必要触发因素,而女性没有显著的变化.
结论:
- 与雄性相比,雌性小鼠的皮层功能和能量消耗对食物限制有更强的抵抗力.
- 新皮质在食物短缺期间对性别特定的节能适应起着至关重要的作用.
- 研究结果显示,大脑对营养压力的代谢和功能反应中存在显著的性别差异.
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