首页> 外文期刊>The European Journal of Neuroscience >Analysis of cell signalling in the rodent pineal gland deciphers regulators of dynamic transcription in neural/endocrine cells.
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Analysis of cell signalling in the rodent pineal gland deciphers regulators of dynamic transcription in neural/endocrine cells.

机译:啮齿类动物松果体中细胞信号的分析破译了神经/内分泌细胞中动态转录的调节因子。

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摘要

In neurons, a temporally restricted expression of cAMP-inducible genes is part of many developmental and adaptive processes. To understand such dynamics, the neuroendocrine rodent pineal gland provides an excellent model system as it has a clearly defined input, the neurotransmitter norepinephrine, and a measurable output, the hormone melatonin. In this system, a regulatory scenario has been deciphered, wherein cAMP-inducible genes are rapidly activated via the transcription factor phosphoCREB to induce transcriptional events necessary for an increase in hormone synthesis. However, among the activated genes is also the inhibitory transcription factor ICER. The increasing amount in ICER protein leads ultimately to the termination of mRNA accumulation of cAMP-inducible genes, including the gene for the Aa-nat that controls melatonin production. This shift in ratio of phosphoCREB and ICER levels that depends on the duration of stimulation can be interpreted as a self-restriction of cellular responses in neurons and has also been demonstrated to interfere with cellular plasticity in many non-neuronal systems.
机译:在神经元中,cAMP诱导基因的时间受限表达是许多发育和适应过程的一部分。要了解这种动态,神经内分泌啮齿动物松果体提供了一个出色的模型系统,因为它具有明确定义的输入(神经递质去甲肾上腺素)和可测量的输出(褪黑激素)。在该系统中,已经破译了一种调节方案,其中cAMP诱导型基因通过转录因子phosphoCREB快速激活,以诱导激素合成增加所必需的转录事件。然而,在激活的基因中还有抑制转录因子ICER。 ICER蛋白量的增加最终导致cAMP诱导型基因的mRNA积累终止,包括控制褪黑激素产生的Aa-nat基因。取决于刺激持续时间的phosphoCREB和ICER水平之比的变化可以解释为神经元中细胞反应的自我限制,并且已经证明在许多非神经系统中会干扰细胞可塑性。

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