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ERM is required for transcriptional control of the spermatogonial stem cell niche

机译:ERM是精原干细胞生态位转录控制所必需的

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Division of spermatogonial stem cells(1) produces daughter cells that either maintain their stem cell identity or undergo differentiation to form mature sperm. The Sertoli cell, the only somatic cell within seminiferous tubules, provides the stem cell niche through physical support and expression of surface proteins and soluble factors(2,3). Here we show that the Ets related molecule(4) (ERM) is expressed exclusively within Sertoli cells in the testis and is required for spermatogonial stem cell self-renewal. Mice with targeted disruption of ERM have a loss of maintenance of spermatogonial stem cell self-renewal without a block in normal spermatogenic differentiation and thus have progressive germ-cell depletion and a Sertoli-cell-only syndrome. Microarray analysis of primary Sertoli cells from ERM-deficient mice showed alterations in secreted factors known to regulate the haematopoietic stem cell niche. These results identify a new function for the Ets family transcription factors in spermatogenesis and provide an example of transcriptional control of a vertebrate stem cell niche.
机译:精原干细胞的分裂(1)产生子细胞,这些子细胞要么保持其干细胞身份,要么进行分化以形成成熟的精子。 Sertoli细胞是生精小管中唯一的体细胞,它通过物理支持以及表面蛋白和可溶性因子的表达来提供干细胞的生态位(2,3)。在这里,我们显示Ets相关分子(4)(ERM)仅在睾丸的支持细胞内表达,并且是精原干细胞自我更新所必需的。有针对性地破坏ERM的小鼠丧失了精原干细胞自我更新的维持能力,而正常生精分化没有受到阻碍,因此具有进行性生殖细胞耗竭和仅支持细胞的综合征。对来自ERM缺陷小鼠的原代支持细胞的微阵列分析显示,已知调节造血干细胞生态位的分泌因子发生了变化。这些结果确定了Ets家族转录因子在精子发生中的新功能,并提供了脊椎动物干细胞生态位转录控制的实例。

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