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首页> 外文期刊>Development >Disrupted gonadogenesis and male-to-female sex reversal in Pod1 knockout mice.
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Disrupted gonadogenesis and male-to-female sex reversal in Pod1 knockout mice.

机译:Pod1基因敲除小鼠中的性腺发育中断和男女性别逆转。

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摘要

Congenital defects in genital and/or gonadal development occur in 1 in 1000 humans, but the molecular basis for these defects in most cases remains undefined. We show that the basic helix-loop-helix transcription factor Pod1 (capsulin/epicardin/Tcf21) is essential for normal development of the testes and ovaries, and hence for sexual differentiation. The gonads of Pod1 knockout (KO) mice were markedly hypoplastic, and the urogenital tracts of both XX and XY mice remained indistinguishable throughout embryogenesis. Within Pod1 KO gonads, the number of cells expressing the cholesterol side-chain cleavage enzyme (Scc) was increased markedly. Biochemical and genetic approaches demonstrated that Pod1 transcriptionally represses steroidogenic factor 1 (Sf1/Nr5a1/Ad4BP), an orphan nuclear receptor that regulates the expression of multiple genes (including Scc) that mediate sexual differentiation. Our results establish that Pod1 is essential for gonadal development, and place it in a transcriptional network that orchestrates cell fate decisions in gonadal progenitors.
机译:生殖和/或性腺发育中的先天性缺陷发生在千分之一的人类中,但是在大多数情况下,这些缺陷的分子基础仍然不确定。我们显示出基本的螺旋-环-螺旋转录因子Pod1(胶囊蛋白/依匹卡丁/ Tcf21)对于睾丸和卵巢的正常发育至关重要,因此对于性别分化也至关重要。 Pod1基因敲除(KO)小鼠的性腺明显发育不良,在整个胚胎发生过程中,XX和XY小鼠的泌尿生殖道仍然无法区分。在Pod1 KO性腺中,表达胆固醇侧链裂解酶(Scc)的细胞数量显着增加。生化和遗传学方法证明Pod1转录抑制类固醇生成因子1(Sf1 / Nr5a1 / Ad4BP),这是一种孤儿核受体,可调节介导性分化的多个基因(包括Scc)的表达。我们的研究结果表明,Pod1对性腺发育至关重要,并将其置于可协调性腺祖细胞中细胞命运决定的转录网络中。

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