Photoperiodic regulation of histamine H3 receptor and VGF messenger ribonucleic acid in the arcuate nucleus of the Siberian hamster

被引:74
作者
Barrett, P
Ross, AW
Balik, A
Littlewood, PA
Mercer, JG
Moar, KM
Sallmen, T
Kaslin, J
Panula, P
Schuhler, S
Ebling, FJ
Ubeaud, C
Morgan, PJ
机构
[1] Rowett Res Inst, Mol Endocrinol Grp, Aberdeen AB21 9SB, Scotland
[2] Aberdeen Ctr Energy Regulat & Obes, Aberdeen AB21 9SB, Scotland
[3] Abo Akad Univ, Dept Biol, FIN-20520 Turku, Finland
[4] Univ Helsinki, Inst Biomed Anat, Ctr Neurosci, Helsinki 00290, Finland
[5] Univ Nottingham, Sch Med, Sch Biomed Sci, Nottingham NG7 2UH, England
关键词
D O I
10.1210/en.2004-1452
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To survive winter the Siberian hamster has evolved profound physiological and behavioral adaptations, including a moult to winter pelage, regression of the reproductive axis, onset of daily torpor and increased capacity for thermogenesis. However, one of the most striking adaptations is the catabolism of intraabdominal and sc fat reserves contributing to the loss of up to 40% of body weight. These physiological and behavioral adaptations are photoperiodically driven, yet neither the site( s) in the brain nor the molecular mechanism( s) involved in the regulation of these profound adaptations is known. Here we report a dynamic regulation of gene expression in a dorsal region of the medial posterior area of the arcuate nucleus ( dmpARC) of the Siberian and Syrian hamster brain in response to altered photoperiod. We show mRNA for the histamine H3 receptor is down- regulated and VGF is up- regulated in the dmpARC in hamsters switched from long- to short-day photoperiod. These data provide further evidence to support the view that the dmpARC is a major site to relay photoperiodic changes and as a site for the long- term regulation of seasonal physiology and behavior.
引用
收藏
页码:1930 / 1939
页数:10
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