Melatonin formation in mammals: in vivo perspectives.

Melatonin formation in mammals: in vivo perspectives.
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哺乳动物中褪黑激素的形成:体内观点。

DOI:
10.1007/s11154-009-9125-5
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发表时间:
2009-12
影响因子:
8.2
通讯作者:
Borjigin, Jimo
Borjigin, Jimo
中科院分区:
医学2区
文献类型:
--
作者:
Chattoraj, Asamanja;Liu, Tiecheng;Zhang, Liang Samantha;Huang, Zheping;Borjigin, Jimo

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褪黑激素是松果体分泌的一种激素,特别是在夜间,有助于哺乳动物的广泛的生理功能。褪黑激素是位于视交叉上核的生物钟的最好理解的输出之一。褪黑激素的合成由位于视交叉上核的生物钟在远端控制,并由响应于生物钟信号而释放的去甲肾上腺素在近端调节。为了了解褪黑激素在体内的合成,我们进行了微透析分析的松果体,监测褪黑激素以及前体(血清素)和中间体(N-乙酰血清素)的褪黑激素合成在自由移动的动物在高分辨率实时。我们的数据揭示了许多使用常规技术未检测到的褪黑激素产生的新特征,其中包括:(1)褪黑激素起效时间的个体间差异较大;(2)松果体中5-羟色胺合成和分泌的昼夜节律调节;以及(3)对体内褪黑激素形成的限速步骤的修正观点。本文将总结我们实验室关于哺乳动物褪黑激素形成的主要发现。
Melatonin is a hormone secreted from the pineal gland specifically at night and contributes to a wide array of physiological functions in mammals. Melatonin is one of the most well understood output of the circadian clock located in the suprachiasmatic nucleus. Melatonin synthesis is controlled distally via the circadian clock located in the suprachiasmatic nucleus and proximally regulated by norepinephrine released in response to the circadian clock signals. To understand melatonin synthesis in vivo, we have performed microdialysis analysis of the pineal gland, which monitors melatonin as well as the precursor (serotonin) and intermediate (N-acetylserotonin) of melatonin synthesis in freely moving animals in realtime at high resolution. Our data revealed a number of novel features of melatonin production undetected using conventional techniques, which include (1) large inter-individual variations of melatonin onset timing; (2) circadian regulation of serotonin synthesis and secretion in the pineal gland; and (3) a revised view on the rate-limiting step of melatonin formation in vivo. This article will summarize the main findings from our laboratory regarding melatonin formation in mammals.
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发表时间: 2007-08-01
影响因子: 10.3
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DOI: 10.1111/j.1600-079x.2005.00222.x
发表时间: 2005-08-01
影响因子: 10.3
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