不活动诱导的动神经促进需要PKCζ在动神经元内的活动
Nathan A Baertsch1, Alexandria B Marciante2, Gordon S Mitchell2
1Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States.
Journal of neurophysiology
|May 1, 2024
概括
不活动诱导的动力促进 (iPMF) 需要动神经元中的非典型蛋白激酶C zeta (PKCζ). 肋间运动神经元PKCζ有助于,但不是必不可少的,短暂的启发性肋间运动促进 (iIMF).
科学领域:
- 神经科学是一个神经科学.
- 呼吸系统生理学 呼吸系统生理学
- 分子生物学分子生物学
背景情况:
- 呼吸神经活动的长期抑制会导致持久的可塑性.
- 不活动诱导的动力促进 (iPMF) 和启发性肋间运动促进 (iIMF) 是这种可塑性的形式.
- 非典型的蛋白激酶C (PKC) 活性至关重要,但具体的异型和位置尚不清楚.
研究的目的:
- 为了研究非典型PKC zeta异型 (PKCζ) 在神经元和肋间运动神经元中的作用.
- 为了确定PKCζ在神经机动神经元中是否对于iPMF是必要的.
- 为了评估PKCζ在肋间运动神经元中是否对于iIMF是必要的.
主要方法:
- 用RNA干扰 (siRNA) 来准鼠和肋间间运动神经元中的PKCζ.
- 大鼠接受神经性呼吸暂停 (呼吸不活) 或时间控制.
- 测量了神经活动和肋间电动图 (EMG) 活动.
主要成果:
- 在性运动神经元中对PKCζ的抑制消除了iPMF.
- PKCζ knockdown减弱了iIMF的作用,表明部分作用.
- 抑制PKCζ还阻断了神经不活动后对高头症的增强性反应.
结论:
- 脑运动神经元内的PKCζ对于长期的iPMF至关重要.
- 在肋间运动神经元中的PKCζ有助于,但不需要,暂时的iIMF.
- 这些发现阐明了呼吸机运动可塑性的关键分子机制.
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