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在中年老鼠中,减肥加剧了肥胖引起的下丘脑炎症

Alon Zemer^1,2, Yulia Haim¹, Alexandra Tsitrina³

¹Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.

|October 17, 2025

概括

中年老鼠的体重减轻加剧了下丘脑炎症和微质变化,但使葡萄糖耐受性正常化. 改善血糖控制不需要解决这些变化.

科学领域:

神经科学是一个神经科学.
代谢研究研究代谢研究
老龄化研究研究.

背景情况:

神经炎症与体重增加和衰老有关.
中年个体对减肥 (WL) 的早期下丘脑反应尚不清楚.
调查下丘脑微质症在WL诱导的正常血糖症中的作用至关重要.

研究的目的:

为了确定中年老鼠的WL诱导的正常血糖是通过解决下丘脑微质症来调解的.
为了比较中年老鼠与年轻小鼠对WL的转录和微质反应.
评估下丘脑变化,脂肪组织炎症和葡萄糖耐受性之间的关系.

主要方法:

中年和年轻小鼠被食正常 (NC) 或高脂肪饮食 (HFD) 8周.
体重减轻是通过切换到NC进行2周的诱导.
进行了全海马体RNA测序,微质形态分析和葡萄糖耐受性测试.

主要成果:

与单独使用HFD相比,中年小鼠的体重减轻加剧了下丘脑转录组变化和微质激活 (细胞体积增加和pNFκB染色) .
尽管发生了加重的下丘脑变化,中年老鼠的葡萄糖耐受性实现了完全正常化.
脂肪组织炎症在体重减轻后持续存在,与下丘脑微质体积相关.

结论:

在中年老鼠中,早期减肥会加剧肥胖引起的下丘脑和微质变化.
在早期减肥期间葡萄糖不耐受性的正常化并不取决于解决这些下丘脑和微质变化.
脂肪组织炎症可能与减肥期间持续的下丘脑神经炎症有关.

关键词:

衰老的衰老衰老的衰老脑下垂体炎症的发生逆转肥胖症的治疗方法减肥的方法减肥的方法减肥的方法

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