Arylalkylamine N-acetyltransferase gene expression in retina and pineal gland of rats under various photoperiods

被引：18

作者：

Engel, L ^{[1
]}

Vollrath, L ^{[1
]}

Spessert, R ^{[1
]}

机构：

[1] Univ Mainz, Dept Anat, D-55099 Mainz, Germany

来源：

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 2004年 / 318卷 / 04期

关键词：

arylalkylamine N-acetyltransferase; retina; pineal gland; photoperiod; circadian oscillator; RT-PCR;

D O I：

10.1016/j.bbrc.2004.04.133

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The present study examines how the circadian oscillators in the retina and the suprachiasmatic nucleus (SCN) respond to changes in photoperiod. Arylalkylamine N-acetyltransferase (aa-nat) gene expression studied by quantitative RT-PCR revealed that in adult Sprague-Dawley rats kept under different light-dark (LD) cycles for two weeks the temporal pattern of AA-NAT mRNA expression was identical in retina and pineal gland. In both tissues, the time span between the onset of darkness and the nocturnal rise in AA-NAT mRNA expression was 3 h under LD 20:4, 6 It under LID 12:12, and 15 It under LD 4:20. As aa-nat expression in the pineal gland is regulated by the circadian oscillator in SCN, the results suggest that the photoperiodic differences accompanying the seasons of the year are imprinted in more than one oscillator and that this may accentuate the important message regarding 'time of year.' (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：983 / 986

页数：4

共 32 条

[11] Photoperiod differentially regulates the expression of Per1 and ICER in the pars tuberalis and the suprachiasmatic nucleus of the Siberian hamster [J].