基础科学和病原发生学
Jessica Fisher1, Sama Jaberi1, Erika Kropf1
1McMaster University, Hamilton, ON, Canada.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
酸盐应激激激活JNK,损害大脑衍生的神经营养因子 (BDNF) 运输在基底前脑胆固醇神经元 (BFCNs). 抑制JNK可以防止这种缺陷,这表明与年龄相关的认知衰退和阿尔茨海默病的目标.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
背景情况:
- 基本前脑胆能神经元 (BFCN) 对于学习和记忆至关重要.
- BFCN的退化和大脑衍生神经营养因子 (BDNF) 运输受损有助于衰老和阿尔茨海默病 (AD) 的认知衰退.
- 老化大脑中的酸盐压力可能会扰乱BDNF运输,但根本的机制尚未完全理解.
研究的目的:
- 调查酸性压力诱导的c-Jun N-终端激酶 (JNK) 激活是否有助于BFCN中BDNF逆行轴突传输的缺陷.
- 为了确定抑制JNK是否可以预防酸盐应激诱导的BDNF运输损伤.
主要方法:
- 主要大鼠的BFCN在微流体室中进行培养,以对轴突进行隔离.
- 神经元用过氧酸盐供体 (SIN-1) 进行治疗,以诱导酸盐应激.
- 通过免疫细胞化学测量了JNK激活,并使用量子点标记的BDNF和活细胞光显微镜评估了BDNF运输.
主要成果:
- 用SIN-1治疗显著增加了JNK激活,并减少了BDNF轴突运输.
- 与SIN-1同时使用JNK抑制剂 (CC401) 阻止了SIN-1引起的BDNF运输减少.
- 这些发现表明,JNK激活调解了化应激对BDNF传输的抑制作用.
结论:
- 过氧酸激活JNK是一个关键机制,将酸盐应激与BFCN中BDNF运输受损联系起来.
- 这项研究强调了一种潜在的途径,通过这种途径,与年龄相关的酸盐应激会导致AD的BFCN退化和认知衰退.
- 准JNK信号可能提供一种治疗策略,以保护BDNF运输和减轻认知缺陷.
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