Signalling pathways regulating the blood-testis barrier.

Signalling pathways regulating the blood-testis barrier.
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信号通路调节血stis屏障。

DOI:
10.1016/j.biocel.2012.12.009
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发表时间:
2013-03
期刊:
The international journal of biochemistry & cell biology
影响因子:
--
通讯作者:
Mruk DD
Mruk DD
中科院分区:
其他
文献类型:
--
作者:
Lie PP;Cheng CY;Mruk DD

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在整个哺乳动物精子发生过程中,前细线期/细线期精母细胞在生精上皮周期的第VIII-XI阶段穿越血睾屏障,同时被困在一个动态的中间室中,该中间室在北极和南极由紧密连接、基底外质特化、桥粒和间隙连接密封。为了使精母细胞能够进入生精上皮的近腔室继续发育,迁移精母细胞上方存在的“旧”连接会解体,而“新”连接会同时在这些生殖细胞下方组装。通过这种方式,血睾屏障的完整性和生精上皮的稳态在精子发生过程中可以保持完整。先前的研究已经显示了一系列细胞事件,包括蛋白质内化和细胞骨架重塑,以强调血-睾丸屏障重建,而其他研究报告BTB功能障碍与p38丝裂原活化蛋白激酶途径的激活有关。在此,我们讨论了哺乳动物睾丸血睾屏障重建的信号通路和机制。
Throughout mammalian spermatogenesis, preleptotene/leptotene spermatocytes traverse the blood-testis barrier during stages VIII-XI of the seminiferous epithelial cycle while trapped within a dynamic intermediate compartment that is sealed at north and south poles by tight junctions, basal ectoplasmic specializations, desmosomes and gap junctions. In order for spermatocytes to gain entry into the adluminal compartment of the seminiferous epithelium for continued development, ‘old’ junctions present above migrating spermatocytes disassemble, while ‘new’ junctions assemble simultaneously below these germ cells. In this way, the integrity of the blood-testis barrier and the homeostasis of the seminiferous epithelium can remain intact during spermatogenesis. Previous studies have shown an array of cellular events, including protein internalization and cytoskeletal remodeling, to underline blood-testis barrier restructuring, whereas other studies have reported BTB dysfunction to associate with activation of the p38 mitogen-activated protein kinase pathway. Herein, we discuss the signaling pathways and mechanisms involved in blood-testis barrier restructuring in the mammalian testis.
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影响因子: --
作者:
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