热应激通过ACSL4介导的脂质过氧化和随后的铁死诱导认知障碍
Qicheng Zhou1, Xinyao Liu1, Wenlan Pan2
1Department of Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, Shanghai, 200433, China.
Molecular neurobiology
|February 18, 2026
概括
热应激会通过触发海马体中的细胞死亡途径铁亡,从而导致认知障碍. 抑制ACSL4,一个关键酶,保护免受热引起的神经毒性和认知缺陷.
科学领域:
- 神经科学是一个神经科学.
- 环境健康 环境健康
- 细胞生物学 细胞生物学
背景情况:
- 热应激 (HS) 是与认知障碍相关的日益严重的环境问题.
- 驱动HS诱导的神经毒性的精确机制尚未完全理解.
- 铁,一种依赖于铁的细胞死亡途径,与各种神经疾病有关.
研究的目的:
- 为了研究铁灭菌在热应激诱导的认知障碍和海马神经毒性的作用.
- 为了阐明HS诱导的神经元损伤背后的分子机制.
- 确定潜在的治疗目标,以减轻与热有关的神经退行.
主要方法:
- 亚急性热应激应用于小鼠模型和HT22海马神经元.
- 使用莫里斯水迷宫和航天飞机箱测试评估认知功能.
- 对海马体铁灭症标记物,氧化应激,脂质代谢和基因表达的分析.
- 药理干预与铁酶抑制剂费罗斯塔丁-1和ACSL4抑制剂罗西格利塔.
主要成果:
- 热应激诱导了海马体中的铁,损害了空间学习和记忆.
- HS改变了阿拉基酸的新陈代谢,并在海马中增加了氧化应激标志物.
- 观察到与铁相关的基因 (ACSL4,TfR1,COX2,CHAC1) 的上调和保护基因 (GPX4,SLC7A11) 的下调.
- 费罗斯塔丁-1和罗西格利塔治疗减轻了认知缺陷,神经元损伤和铁亡标志物.
结论:
- 热应激通过在海马神经元中的ACSL4依赖性脂质过氧化和铁亡途径诱导认知障碍.
- ACSL4在调解HS诱导的铁和神经毒性方面发挥着至关重要的作用.
- 针对ACSL4提供了一个潜在的治疗策略,可以预防与热有关的认知衰退和神经退行.
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