纤维细胞生长因子9 (FGF9) 介导的神经退行:对进展性多发性硬化症的影响?
Katja Thümmler1, Claudia Wrzos2, Jonas Franz2,3,4,5
1School of Infection and Immunity, University of Glasgow, Glasgow, UK.
Neuropathology and applied neurobiology
|September 14, 2023
概括
纤维细胞生长因子9 (FGF9) 的过度表达会导致神经元死亡和大脑灰质病变. 准FGF9通路可能为神经退行性疾病 (如多发性硬化症和严重抑郁症) 提供新的治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 病理学 病理学 病理学
背景情况:
- 纤维细胞生长因子 (FGF) 信号与神经和精神疾病有关,但其在病变发生中的具体作用尚不清楚.
- 在多发性硬化症 (MS) 病变的发展过程中观察到FGF1,FGF2和FGF9表达的增加.
- 在主要抑郁症 (MDD) 中,FGF9也被选择性上调,这表明它对神经元功能和生存有直接影响.
研究的目的:
- 研究FGF9对神经元功能,存活率及其在神经退行性疾病发病过程中的作用的特定影响.
- 探索针对MS,MDD和其他神经退行性疾病治疗干预的FGF9依赖途径的潜力.
主要方法:
- 用FGF1,FGF2或FGF9.9治疗的髓培养物的转录概况.
- 通过转录,电生理学和免疫光技术研究FGF9对皮层神经元的影响.
- 在体内研究涉及向鼠运动皮层注入编码FGF9或EGFP的腺相关病毒 (AAV) 载体的立体注射.
主要成果:
- 在髓化培养中,FGF9治疗降低了与轴突运输和突触功能相关的基因网络.
- 在皮层神经元中,FGF9迅速减少了突触功能基因表达,阻断了光诱导性尖端活动,并诱导了细胞死亡.
- 在体内,FGF9的过度表达导致神经元的快速丧失,慢性灰质病变,神经轴突的减少和髓的丧失.
结论:
- 过度表达FGF9可以驱动神经轴突病理,而不依赖于MS中免疫介导的脱髓化.
- 针对神经元的FGF9依赖性通路,为减轻MS,MDD和其他神经退行性疾病中神经轴缩和损失提供了一个新的治疗策略.
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