Plzf通过对抗mTORC1来调节生殖系祖先的自我更新
Robin M Hobbs1, Marco Seandel, Ilaria Falciatori
1Cancer Genetics Program, Beth Israel Deaconess Cancer Center, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA.
Cell
|August 10, 2010
概括
过度活跃的mTORC1信号通过破坏利基信号来消耗干细胞. 转录因子Plzf通过抑制mTORC1来维持干细胞池,这对精子前代细胞更新至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 干细胞生物学 干细胞生物学
- 生殖生物学 生殖生物学
背景情况:
- 拉巴胺素复合体1 (mTORC1) 的机械性标的过活性与干细胞枯竭有关.
- 在mTORC1中介的干细胞丧失背后的确切机制尚不清楚.
- 精子原始细胞 (SPC) 对于男性生育至关重要,并作为研究干细胞维护的模型.
研究的目的:
- 阐明mTORC1在SPC维护中的作用.
- 研究mTORC1信号影响干细胞功能的分子机制.
- 在干细胞更新的背景下,确定调节mTORC1活动的因素.
主要方法:
- 使用精子原始细胞 (SPC) 作为模型系统.
- 研究了PLZF缺乏对mTORC1活动和GDNF信号传递的影响.
- 分析了mTORC1和GDNF受体信号之间的负反循环.
主要成果:
- mTORC1的过度活跃会通过干扰利基来源的信号来损害干细胞的维持.
- 缺乏Plzf的SPC表现出增强的mTORC1活动.
- 由于mTORC1-介导的对GDNF受体的负面反,plzf缺乏导致SPC中抑制的GDNF反应.
- Plzf通过上调Redd1,一个mTORC1抑制剂来抵消mTORC1的活动.
结论:
- 该mTORC1-Plzf相互作用作为一个关键调节器,维持精子干细胞池.
- 一个涉及mTORC1和GDNF受体的负反机制平衡了SPC增殖和自我更新.
- 了解这种途径可以了解干细胞稳态和潜在的治疗目标,以保护生育能力.
相关概念视频
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