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首页> 外文期刊>Frontiers in neuroendocrinology >Glucocorticoid regulation of peptide genes in neuroendocrine CRH neurons: a complexity beyond negative feedback.
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Glucocorticoid regulation of peptide genes in neuroendocrine CRH neurons: a complexity beyond negative feedback.

机译:糖皮质激素调节神经内分泌CRH神经元中的肽基因:复杂性超出了负反馈。

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摘要

This review will examine our current knowledge of a fundamental property of CRH neuroendocrine neurons: how the major endpoint of the HPA axis--adrenal glucocorticoids--interacts with the mechanisms controlling the expression of the genes that encode ACTH secretogogues. A great deal of work over the past 25 years has led to the notion that this question has an ostensibly simple answer: glucocorticoids inhibit peptide gene expression using "negative feedback" at the CRH neuron and elsewhere. However, closely examining how glucocorticoids act in different physiological circumstances reveals a much more complex set of answers, particularly if we consider how the processes that control peptide synthesis and release are coupled. Out of this examination emerges a more flexible and complex framework for examining the integrative mechanisms controlling the CRH neuron. Although we will mostly focus on the Crh gene, relevant aspects of the vasopressin (Avp) and pro-enkephalin (pEnk) gene regulatory mechanisms will also be discussed.
机译:这篇综述将检查我们目前对CRH神经内分泌神经元基本特性的了解:HPA轴的主要终点-肾上腺糖皮质激素-与控制编码ACTH分泌促泌素的基因表达的机制相互作用。在过去的25年中,大量的工作导致了这个问题的表面上很简单的答案:糖皮质激素在CRH神经元和其他部位使用“负反馈”抑制肽基因的表达。然而,仔细检查糖皮质激素在不同生理环境下的作用揭示了一组更为复杂的答案,特别是如果我们考虑控制肽合成和释放的过程如何耦合的话。通过这种检查,出现了一个更灵活,更复杂的框架,用于检查控制CRH神经元的整合机制。虽然我们将主要集中在Crh基因上,但还将讨论血管加压素(Avp)和前脑啡肽(pEnk)基因调控机制的相关方面。

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