间歇性禁食重编程大脑蛋白质组以防止血管痴呆症中的突触退化和认知障碍
Nishat I Tabassum1,2, Sharmelee Selvaraji3,4, Yibo Fan1,2
1Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Melbourne, Australia.
Theranostics
|August 27, 2025
概括
间歇性禁食 (IF) 通过保持突触完整性和功能来防止血管痴呆的认知衰退. 这项研究表明IF通过代谢重编程和减少神经炎症来增强突触弹性.
科学领域:
- 神经科学
- 血管生物学
- 代谢研究
背景情况:
- 血管性痴呆 (VaD) 源于慢性大脑低 perfusion (CCH),导致突触退化和认知衰退.
- 关联血管问题与VAD突触损失的机制尚未完全理解.
- 间歇性禁食 (IF) 是一种潜在的干预措施,但其对VaD突触健康的影响尚不清楚.
研究的目的:
- 研究IF对CCH诱导的突触退化和认知障碍的影响.
- 在小鼠模型中探索IF神经保护作用的分子机制.
主要方法:
- 在小鼠中通过双侧常见动脉狭窄 (BCAS) 诱导的慢性脑静脉输液 (CCH).
- 在BCAS诱导之前实施间歇性禁食 (每天16小时).
- 通过巴恩斯迷宫评估认知功能;通过电子显微镜,免疫染和免疫组织化学评估突触完整性;进行海马蛋白质组分析.
主要成果:
- 在BCAS小鼠中保持认知功能和突触密度,防止空间记忆缺陷.
- 电子显微镜证实了突触保存,没有改变基线结构;关键突触蛋白水平没有变化.
- 蛋白质组分析显示,IF可提高突触稳定剂的调节,增强GABAergic信号传递,抑制神经炎症,具有多相神经保护作用.
结论:
- 间歇性禁食 (IF) 作为血管痴呆症 (VaD) 的突触弹性强度调节剂.
- 保护突触结构,抑制炎症突触损失,并重编程新陈代谢,为血管认知障碍提供非药物治疗策略.
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