Homeobox genes and melatonin synthesis: regulatory roles of the cone-rod homeobox transcription factor in the rodent pineal gland.

Homeobox genes and melatonin synthesis: regulatory roles of the cone-rod homeobox transcription factor in the rodent pineal gland.
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DOI:
10.1155/2014/946075
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发表时间:
2014
影响因子:
--
通讯作者:
Rath MF
Rath MF
中科院分区:
生物学3区
文献类型:
--
作者:
Rohde K;Møller M;Rath MF

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松果体中褪黑激素的夜间合成受芳基烷基胺N-乙酰转移酶(AANAT)酶活性的昼夜节律控制。在啮齿类动物中,Aanat基因表达显示出明显的昼夜节律;夜间腺体中去甲肾上腺素的释放导致基于cAMP的Aanat转录诱导。然而,存在额外的转录控制机制。同源框基因,这是众所周知的编码转录因子控制发育过程,也表达在成熟的啮齿动物松果体。其中,视锥-视杆同源盒(CRX)转录因子被认为控制松果体特异性Aanat表达。根据我们对Crx在啮齿动物松果体中的理解的最新进展,我们在这里建议同源框基因通过确保松果体特异性Aanat表达和促进基于cAMP反应元件的昼夜褪黑激素产生在成年松果体生理中发挥作用。
Nocturnal synthesis of melatonin in the pineal gland is controlled by a circadian rhythm in arylalkylamine N-acetyltransferase (AANAT) enzyme activity. In the rodent, Aanat gene expression displays a marked circadian rhythm; release of norepinephrine in the gland at night causes a cAMP-based induction of Aanat transcription. However, additional transcriptional control mechanisms exist. Homeobox genes, which are generally known to encode transcription factors controlling developmental processes, are also expressed in the mature rodent pineal gland. Among these, the cone-rod homeobox (CRX) transcription factor is believed to control pineal-specific Aanat expression. Based on recent advances in our understanding of Crx in the rodent pineal gland, we here suggest that homeobox genes play a role in adult pineal physiology both by ensuring pineal-specific Aanat expression and by facilitating cAMP response element-based circadian melatonin production.
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