The Jak-STAT target Chinmo prevents sex transformation of adult stem cells in the Drosophila testis niche.

The Jak-STAT target Chinmo prevents sex transformation of adult stem cells in the Drosophila testis niche.
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DOI:
10.1016/j.devcel.2014.10.004
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发表时间:
2014-11-24
期刊:
影响因子:
11.8
通讯作者:
Matunis, Erika L.
Matunis, Erika L.
中科院分区:
生物学1区
文献类型:
--
作者:
Ma, Qing;Wawersik, Matthew;Matunis, Erika L.

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局部信号维持许多组织中的成体干细胞。成体干细胞的性别特征是否也必须得到维持尚不清楚。在成年果蝇睾丸生态位中,局部 Jak-STAT 信号传导通过多个效应器促进体细胞囊肿干细胞 (CySC) 更新,包括假定的转录因子时间不适当的形态发生 (Chinmo)。在这里,我们发现 Chinmo 还可以防止 CySC 的女性化。 Chinmo 促进 CySC 及其后代中典型雄性性别决定因子 DoublesexM (DsxM) 的表达,并且 CySC 谱系中 DsxM 的异位表达部分挽救了 chinmo 性别转化表型,将 Chinmo 置于 DsxM 的上游。 Dsx 同源物 DMRT1 可以阻止成年哺乳动物睾丸中分化体细胞的雄性向雌性转化,但其调节机制尚不清楚。我们的工作表明,性维持发生在成体干细胞中,并且这种高度保守的过程受到生态位信号效应器的控制。
Local signals maintain adult stem cells in many tissues. Whether the sexual identity of adult stem cells must also be maintained was not known. In the adult Drosophila testis niche, local Jak-STAT signaling promotes somatic cyst stem cell (CySC) renewal through several effectors, including the putative transcription factor Chronologically inappropriate morphogenesis (Chinmo). Here, we find that Chinmo also prevents feminization of CySCs. Chinmo promotes expression of the canonical male sex determination factor DoublesexM (DsxM) within CySCs and their progeny, and ectopic expression of DsxM in the CySC lineage partially rescues the chinmo sex transformation phenotype, placing Chinmo upstream of DsxM. The Dsx homologue DMRT1 prevents the male-to female conversion of differentiated somatic cells in the adult mammalian testis, but its regulation is not well understood. Our work indicates that sex maintenance occurs in adult somatic stem cells, and that this highly conserved process is governed by effectors of niche signals.
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发表时间: 2011-07-20
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