帕金森病的LRRK2-G2019S风险基因突变驱动了特定于性别的行为和细胞适应慢性变量压力
Christopher A Guevara1,2,3, Kumayl Alloo1,2,4, Swati Gupta1,2
1Nash Family Department of Neuroscience, New York, NY, United States.
Frontiers in behavioral neuroscience
|September 27, 2024
概括
在小鼠中的LRRK2 G2019S突变在基线时没有引起焦虑. 慢性压力对携带突变的雄性和雌性小鼠的焦虑类行为和大脑活动产生了差异性的影响,这表明性别特异性的影响.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 精神病学是一个精神病学.
背景情况:
- 焦虑是帕金森病 (PD) 的非运动症状,在运动症状之前出现.
- 患PD的焦虑影响女性比男性更大,但潜在的机制和性别特异性的压力影响尚不清楚.
- LRRK2 G2019S突变是晚期发病PD的重要危险因素.
研究的目的:
- 研究LRRK2 G2019S突变对小鼠压力诱导的焦虑类行为的性别特异性影响.
- 为了探索压力,焦虑和帕金森病之间的关系,考虑性别差异.
- 为了检查与LRRK2突变和性别有关的应激反应的神经电路活动模式.
主要方法:
- 使用了具有LRRK2 G2019S突变和野生类型对照的年轻成年雄性和雌性小鼠.
- 评估使用主体内部设计的焦虑类行为,测试小鼠在28天变量压力范式之前和之后.
- 使用cFos免疫标记后应激分析了大脑区域的细胞活动.
主要成果:
- 根据基因型,在两种性别中都没有观察到基线焦虑类行为.
- 在经历了慢性压力后,与对照组相比,雄性LRRK2 G2019S小鼠表现出改变的新奇性抑制养.
- 雌性LRRK2 G2019S小鼠表现出与野生型雌性类似的应激反应;然而,大脑活动模式不同,雄性在核中表达的cFos更高.
结论:
- 单靠LRRK2 G2019S突变并不能诱导类似焦虑的行为.
- 慢性压力对携带LRRK2 G2019S突变的雄性和雌性小鼠的焦虑类行为和神经激活有不同的影响.
- 这些发现表明,与帕金森病中LRRK2 G2019S突变相关的与压力相关的神经回路中的性别特异性适应.
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