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卵巢功能的丧失阻止了炼诱导的肝脏髓流动的激活

Edziu Franczak^1,2, Benjamin A Kugler^1,3,4,5, Sebastian F Salathe¹

¹Department of Cell Biology and Physiology, The University of Kansas Medical Center, Kansas City, Kansas, United States.

American journal of physiology. Endocrinology and metabolism

|April 28, 2025

概括

卵巢功能的丧失通过减少肝脏线粒细胞衰变 (mitophagy) 来降低与代谢功能障碍相关的脂肪性肝病 (MASLD) 的运动效益. 这表明更年期通过危害线粒体质量控制加剧了MASLD.

科学领域:

肝病学肝病学是一种肝病学.
线粒体生物学线粒体生物学
内分泌学在内分泌学.

背景情况:

通过改善肝脏线粒体能量代谢,运动对代谢功能障碍相关的脂肪性肝病 (MASLD) 有好处.
雌激素会影响线粒体功能,而其在绝经后的下降可能会降低治疗MASLD的运动疗效.
对于清除受损的线粒体至关重要的肝细胞化,通过运动被激活,但其在绝经后状态的调节尚不清楚.

研究的目的:

为了调查卵巢功能丧失 (卵巢切除术,OVX) 是否会加剧MASLD并损害运动诱导的肝细胞衰变.
为了确定OVX对线粒体能量和线粒体活性激活在不同饮食的小鼠急性炼后的影响.

主要方法:

雌性小鼠接受了卵巢切除 (OVX) 或假手术,并食低脂肪 (LFD) 或高脂肪饮食 (HFD) 以诱导MASLD.
鼠标进行了一次跑步机炼或保持久坐.
肝脏线粒体被分离并分析了线粒体蛋白质,DRP1招募和线粒体过氧化 (H2O2) 通过西式涂抹和蛋白质组的产生.

主要成果:

卵巢切除术 (OVX) 降低了基底线粒体流量,并在高脂肪饮食 (HFD) 的小鼠中减轻了与线粒体相关的蛋白质和DRP1招募的运动诱导增加.
线粒体H2O2的产生,一个线粒体活化剂,在所有群体除OVX+HFD小鼠外,随着运动而增加.
在低脂肪饮食 (LFD) 的OVX小鼠中,运动部分恢复了减少的基础线粒体流量.

结论:

卵巢功能丧失会损害身体在运动后激活肝细胞化的能力,尤其是在高脂肪饮食条件下.
这种受损的线粒体质量控制可能有助于绝经后妇女MASLD的发病.
肝脏线粒体呼吸能力降低和线粒体衍生H2O2产量的改变与OVX后的线粒体衰减有关.

关键词:

一个女人,一个女人,一个女人.肝脏肝脏肝脏肝脏肝脏肝脏线粒细胞衰变 (mitophagy) 是一种神经衰变的过程.蛋白质组学蛋白质组学蒸汽症是一种蒸汽症.

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