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在塞尔托利细胞功能中的平面细胞极性蛋白脂肪1
Tiao Bu1, Lingling Wang1, Xiaolong Wu2
1Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, Jiangsu 226001, China.
Endocrinology
|March 30, 2024
概括
平面细胞极性蛋白Fat1及其与Fjx1的复合体对于塞尔托利细胞的功能至关重要,维护血液-丸屏障并支持精子生成.
科学领域:
- 细胞生物学 细胞生物学
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 脂肪非典型的原蛋白 (Fat) 和与达赫索原蛋白相关的蛋白质 (Dchs) 在塞尔托利细胞接口形成细胞间桥梁,对丸功能至关重要.
- 这些桥梁由非受体Ser/Thr蛋白激酶Fjx1支持,这是Drosophila研究中保存的机制.
研究的目的:
- 调查脂肪非典型卡德林1 (Fat1) 在塞尔托利细胞功能和血液丸屏障 (BTB) 完整性的作用.
- 阐明Fat1影响细胞骨动力学和丸内的细胞间相互作用的分子机制.
主要方法:
- 利用RNA干扰 (RNAi) 在初级塞尔托利细胞培养物中降低Fat1表达,模仿体内BTB.
- 进行了功能测试,以评估塞尔托利细胞紧接口 (TJ) 透性和TJ完整性.
主要成果:
- 通过Fat1/Fjx1复合体改变actin和微管聚合, Knockdown of Fat1破坏了塞尔托利细胞的功能.
- 发现Fat1与β-catenin,α-N-catenin和Prickle 1/Vangl1复合物结合,这表明它在平面细胞极性 (PCP) 途径中的作用.
- 脂肪1是稳定PCP在塞尔托利细胞接口的组成部分,对精子生成至关重要.
结论:
- 脂肪1在维持血液丸屏障的结构和功能完整性方面发挥着至关重要的作用.
- Fat1/Fjx1复合体调节细胞骨动力学,Fat1与其他PCP蛋白的结合稳定了精子生成所必需的细胞间相互作用.
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