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Estrogen Modulates HNF-3 beta mRNA Levels in the Developing Chick Oviduct

机译:雌激素调节发育中的小鸡输卵管中的HNF-3βmRNA水平

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摘要

Steriod hormones are involved in many physiological processes, including tissue-specific gene expression, homeostasis, and development. The chick oviduct represents an excellent system in which to study many of these events, as it is highly steriod responsive. Here, we report the cloning of chick HNF-3 beta from an oviduct cDNA library and its expression pattern in adult tissues and in the developing oviduct in response to estrogen treatment. Overall, cHNF-3 beta was expressed at high levels in the immature chick oviduct and lung and, to a lesser extent, in the liver, kidney, and muscle. This expression pattern is divergent from that of mammalian HNF-3 beta , which is not expressed in kidney or muscle. Furthermore, several lengths of cHNF-3 beta mRNA transcripts were detected that were expressed tissue specifically. Interestingly, cHNF-3 beta mRNA levels were differentially influenced by estrogen as a result of a post-transcriptional effect on the cHNF-3 beta message in some tissues. Finally, a role for cHNF-3 beta is proposed in the estrogen-stimulated differentiation and development of the oviduct, as cHNF-3 beta mRNA expression is induced in the early stages of oviduct development and declines as the animal becomes sexually mature.
机译:甾体激素参与许多生理过程,包括组织特异性基因表达,体内稳态和发育。鸡的输卵管是一个非常好的系统,可以在其中研究许多此类事件,因为它具有高度的立体响应性。在这里,我们报道了从输卵管cDNA文库克隆小鸡HNF-3 beta及其在成年组织和发育中的输卵管中响应雌激素治疗的表达模式。总体而言,cHNF-3 beta在未成熟的鸡输卵管和肺中高水平表达,而在肝脏,肾脏和肌肉中则较少表达。这种表达方式与哺乳动物HNF-3 beta的表达方式不同,后者在肾脏或肌肉中不表达。此外,检测到了几种长度的cHNF-3βmRNA转录本,这些转录本是组织特异性表达的。有趣的是,由于转录后对某些组织中cHNF-3 beta信息的作用,雌激素对cHNF-3 beta mRNA水平有不同的影响。最后,有人提出了cHNF-3 beta在雌激素刺激的输卵管分化和发育中的作用,因为cHNF-3 beta mRNA表达在输卵管发育的早期被诱导,并随着动物的性成熟而下降。

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