研究雌性周期依赖的荷尔蒙变化对成年小鼠神经发生的影响
Leila Mirzaeian1, Khadijeh Bahrehbar2, Mandana Emamdoust3
1Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
Steroids
|September 21, 2024
概括
在雌性周期期间的性激素波动会影响成年小鼠的神经发生. 雌激素和孕激素的增加与神经营养因子的升高相关,促进海马和腹腔下区域的新神经元和天体细胞的产生.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 神经发生,从神经干细胞 (NSC) 产生新的神经元,发生在成人大脑中.
- 性激素对大脑发育和功能至关重要.
- 雌性周期涉及周期性的荷尔蒙变化,可能会影响神经发生.
研究的目的:
- 为了研究成年老鼠大脑在雌性周期的不同阶段的神经变化.
- 为了将荷尔蒙波动与神经生成标记物和神经营养因子表达相关联.
主要方法:
- 雌性NMRI小鼠被分为四个雌性周期阶段:雌性,前雌性,甲雌性和二雌性.
- 阴道涂抹确定了雌性周期阶段.
- 使用ELISA测量了激素水平 (雌激素,孕激素,益生素,FSH,LH).
- 评估了BDNF,NGF和CNTF在海马中的基因表达,以及SVZ中的GFAP.
主要成果:
- 在孕期期间,雌激素和FSH水平显著上升 (p < 0.001).
- 在Diestrous期间,孕激素和孕乳素水平显著增加 (p < 0.001).
- 在前和后阶段,海马体中BDNF,NGF和CNTF的表达显著增加 (p < 0.001).
- 在SVZ中的GFAP+细胞计数在Proestrous和Diestrous组显著增加 (p < 0.05,p < 0.01,p < 0.001).
结论:
- 性激素,特别是雌激素的雌性循环驱动的变化刺激了新神经元和星球细胞的产生.
- 在孕期和孕期期间增加的神经营养因子会促进成年老鼠大脑的神经发生.
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