转移的GnRH神经元组合是连续的排卵前素激素激增的基础
Shel-Hwa Yeo1, Su Young Han1, Allan E Herbison2
1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, United Kingdom.
概括
释放性激素 (GnRH) 神经元活动在雌性小鼠中显示出显著的周期变化. 每个周期都会招募不同的神经元组,以确保尽管个体变异,但它们的繁殖能力强大.
科学领域:
- 神经科学是一个神经科学.
- 生殖生物学 生殖生物学
- 内分泌学 在内分泌学.
背景情况:
- 排卵前激增的性腺激素释放激素 (GnRH) 对于哺乳动物的繁殖至关重要,由协调的神经元组合驱动.
- 了解这种GnRH激增机制的可变性和强度对于生殖健康研究至关重要.
研究的目的:
- 研究在生殖周期期间GnRH激增机制的个人间和个人内变异性.
- 确定参与产生GnRH激增的神经元群体,并评估它们在周期上的一致性.
主要方法:
- 在雌性小鼠中利用GCaMP纤维光度测量GNRH神经元活动在远端树枝.
- 采用即时早期基因激活标记 (c-Fos,c-Jun,基因标记) 来评估神经元活动的短期和长期.
- 作为一个比较措施,监测了连续的前性质激素升.
主要成果:
- 在GnRH神经元激增活动中,在整个生殖周期中,无论是在单个小鼠之间还是在单个小鼠内部,发病,幅度和形状都表现出了显著的变化.
- 在每次激增期间,大约50%的GnRH神经元被激活,而这些活跃神经元中只有一半参与了前一次激增.
- 对于每次激增事件,不同的,重叠的GnRH神经元子群被招募到组合中.
结论:
- 这种GnRH激增机制表现出显著的个体间和个体内变异性.
- 每个周期招募不同的GnRH神经元子群体有助于变异性,但确保了这一关键生殖事件的稳定性.
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