cAMP/PKA信号调节TDP-43的聚合和错位
Diana M Ho1, Muhammad Shaban2,3,4,5, Faisal Mahmood2,3,4,5
1Department of Cell Biology, Harvard Medical School, Boston, MA 02115.
概括
调节cAMP/PKA通路,通过准像Dunce和PKA-R2这样的基因,可以减少TDP-43蛋白聚合和错位化,改善肌缩侧面硬化症 (ALS) 模型中的运动缺陷.
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
- 遗传学 遗传学 是一个
背景情况:
- 细胞质错位化和TDP-43的聚合是肌缩侧面硬化症 (ALS) 的关键特征.
- 调节这些TDP-43病理的分子机制在很大程度上是未知的.
- 脂酶D (Pld) 途径与ALS相关的表型有关.
研究的目的:
- 为了确定涉及TDP-43规定的Pld路径的下游目标.
- 研究cAMP/PKA信号在TDP-43蛋白病变中的作用.
- 通过调节这种途径来探索ALS的治疗策略.
主要方法:
- 在 *Drosophila melanogaster* 中进行全基因组选,以确定 *TDP-43* 和 *FUS* 的修饰剂.
- 在一个过度表达*TDP-43*正统基因*TBPH*的*Drosophila*模型中,确定了修饰基因 (*dunce*, *PKA-R2*) 的遗传敲除.
- 在运动神经元中评估TBPH聚合和错位.
- 评估成年的运动功能和寿命.
主要成果:
- 固酶*dunce*和PKA抑制子单元*PKA-R2*被确定为*TBPH*诱导的表型的修饰剂.
- 打击*dunce*或*PKA-R2*缓解的TBPH聚合和错位.
- 减少 *dunce* 或 *PKA-R2* 改善了 *TBPH* 模型中的运动缺陷和延长寿命.
- 发现PKA激酶活性是TBPH和Pld的下游.
- 过度表达CrebA,一个PKA目标,拯救了TBPH错位.
结论:
- cAMP/PKA信号通路是TDP-43聚合和错位化的关键调节器.
- 增强cAMP/PKA信号传递为ALS提供了潜在的治疗途径.
- 针对*dunce*和*PKA-R2*等组件可能会改善病理性TDP-43.3的分子和功能后果.
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