罗信号传递促进了细胞刺激性和突触传输
Ariana José1,2, Pravat Dhakal1,3, Rossana Signorelli3
1These authors contributed equally.
bioRxiv : the preprint server for biology
|November 26, 2025
概括
在神经元和肌肉中的Rho GTPase信号通过增加神经电路刺激性来促进卵产. 这项研究澄清了Rho Rho.
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
- 遗传学 是一个遗传学.
背景情况:
- 涉及Trio RhoGEF和脂酶C的Gαq信号传递增强了神经递质释放.
- 在G蛋白信号通路中的Rho GTPase和脂酶C之间的相互作用尚未完全理解.
- C. elegans的产卵回路是研究G蛋白调节神经刺激性的模型.
研究的目的:
- 调查Rho GTPase在G蛋白介导的神经电路刺激性调节中的作用.
- 为了确定Rho和脂酶C信号通路是共享的还是独立的.
- 阐明Rho在C. elegans产卵回路中的突触前和突触后功能.
主要方法:
- 利用C. elegans的产卵电路,专注于雌雄性特异性指挥神经元 (HSN) 和阴道肌肉.
- 采用基因操纵来表达构成性活性 (Rho-1(G14V)) 和抑制性 (Rho-1(T19N),C3转移酶) 的Rho变体.
- 测量HSN和肌中的 (Ca2+) 活性,以评估神经刺激性和肌肉收缩.
主要成果:
- 在HSN或肌中激活Rho-1增加了Ca2+活性,并刺激了卵产.
- 抑制HSN中的Rho信号降低了HSN的Ca2+活性和卵产受损.
- 特定于HSN的Rho缺乏导致依赖伸展的肌Ca2+活性,这表明神经递质释放增强减少.
结论:
- 罗-GTPase在突触前和突触后都起作用,促进神经刺激和产卵.
- 对于Gαq介导的神经递质释放在HSN-vulval肌肉突触中的增强,Rho信号传递至关重要.
- 这些发现描述了Rho在调节神经电路功能和行为的特定作用.
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