肝脏HMGCS2衍生的β-酸减弱海马体的胰岛素抵抗和神经炎症,以促进MASLD诱导的认知功能

相关实验视频

Updated: Jul 9, 2026

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Published on: January 11, 2013

Lijuan Nie^1,2, Jing Sun¹, Weilong Xu¹

¹Department of Endocrinology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.

Communications biology

|January 10, 2026

概括

与代谢功能障碍相关的脂肪性肝病 (MASLD) 损害了认知. 减少β-基酸盐 (BHB) 会使这种情况恶化,但BHB补充剂可以通过改善胰岛素信号传递和减少炎症来保护大脑.

科学领域:

神经科学是一个神经科学.
代谢障碍代谢障碍代谢障碍
肝病学肝病学是一种肝病学.

背景情况:

认知障碍是代谢功能障碍相关的脂肪性肝病 (MASLD) 的已知的并发症.
贝塔-基酸盐 (BHB),一种体,在代谢压力期间提供替代的大脑能量,并可能具有神经保护性质.

研究的目的:

研究BHB在MASLD相关认知障碍中的作用.
阐明潜在的机制,包括神经炎症和胰岛素信号通路.

主要方法:

20周的高脂肪饮食 (HFD) 在小鼠中诱导了MASLD,创造了认知功能障碍的模型.
在3 - 基 - 3 - 甲基氨基-CoA合成酶2 (Hmgcs2) 淘汰赛小鼠,野生型 (WT) 小鼠和补充了外源BHB的小鼠之间进行了比较.
评估结果包括认知功能 (Y迷宫,新型物体识别),海马病理 (粉样β,),神经炎症标志物,葡萄糖/脂质平衡,以及关键信号通路 (IRS/PI3K/AKT/GSK3β).

主要成果:

Hmgcs2淘汰赛小鼠表现出显著的代谢失调,认知衰退,海马p-Tau/Aβ聚合增加,神经炎症增加.
这些小鼠也表现出大脑胰岛素信号通路受损.
外源BHB补充剂有效地改善了这些不良的代谢,认知和神经病理表型.

结论:

减少Hmgcs2表达和随后较低的BHB水平是MASLD认知障碍的关键因素.
大脑胰岛素信号干扰和神经炎症是推动MASLD诱导认知缺陷的关键机制.
BHB在缓解与MASLD相关的认知功能障碍方面显示出显著的治疗潜力.

更多相关视频

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain

Published on: January 4, 2018

Mouse Model of Metabolic Dysfunction-Associated Steatotic Liver Disease with Fibrosis

Mouse Model of Metabolic Dysfunction-Associated Steatotic Liver Disease with Fibrosis

Published on: July 18, 2025

相关概念视频

Hepatic Encephalopathy

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...