脑下垂体皮质细胞从脑脊液中内化格林:分子机制和功能影响
Ivana M Gomez1, Maia Uriarte1, Gimena Fernandez1
1Laboratory of Neurophysiology of the Multidisciplinary Institute of Cell Biology [IMBICE, Argentine Research Council (CONICET) and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), National University of La Plata], La Plata, Buenos Aires, Argentina.
Molecular metabolism
|October 14, 2024
概括
脑下垂体皮质细胞通过克拉斯林介导的内细胞分裂通过血液-脑脊液接口运输格林,从而影响激素的中心作用.
科学领域:
- 神经内分泌学神经内分泌学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 格雷林是一种类激素,具有显著的中枢神经系统作用,由其受体介导.
- 脑下垂体的皮质细胞是位于血液-脑脊液接口处的专门的质细胞.
研究的目的:
- 为了研究下丘脑皮质皮质细胞在通过血液-脑脊液 (CSF) 接口传输格林中的作用.
- 确定格林内部化和被皮细胞运输的机制.
- 评估tanycyte介导的格林素运输对其中心作用的功能相关性.
主要方法:
- 在实验室研究中,使用初级大鼠下丘脑的tanycytes.
- 在实验室研究中,使用小鼠下丘脑外显剂.
- 使用小鼠进行的体内研究,包括药理上抑制克拉斯林介导的内细胞分裂.
主要成果:
- 光激素 (Fr-ghrelin) 通过一个独立于激素受体 (GHSR) 的克拉特林依赖机制,迅速被tanycytes内化.
- 在培养的tanycytes中,fr-ghrelin从 soma 运输到末脚,并在扩展体的顶极内化.
- 在体内,与CSF结合的Fr-ghrelin被β型tanycytes内化,并且抑制克拉介导的内细胞分裂延长了ghrelin的运动效应.
结论:
- 脑下垂体皮质细胞积极通过血脑脊髓液屏障运输格林.
- 细胞介导的格林输送,通过克拉特林介导的内细胞突变,可以调节格林在CSF中的度.
- 这种传输机制可能会影响格林的中心作用的持续时间.
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