Melatonin instantaneously resets intrinsic circadian rhythmicity in the rat suprachiasmatic nucleus

被引:24
作者
Sumova, A
Illnerova, H
机构
[1] Institute of Physiology, Acad. of Sci. of the Czech Republic, 14220 Prague 4
关键词
circadian pacemaker; suprachiasmatic nucleus; melatonin entrainment; c-Fos; in vivo; rat;
D O I
10.1016/S0304-3940(96)13159-1
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
In order to follow resetting of the rat circadian pacemaking system by melatonin in vivo, the rhythm in the light-induced c-fos expression was used as a marker of the intrinsic rhythmicity of the suprachiasmatic nucleus (SCN). ii single melatonin administration during late day to rats maintained originally under a short photoperiod with 8 h of light per day or under a long photoperiod with 16 h of light per day phase advanced immediately the evening rise in the light-induced SCN c-Fos immunochemistry by about 1.5 h. The data indicate that melatonin administration in vivo may instantaneously reset the intrinsic SCN rhythmicity.
引用
收藏
页码:181 / 184
页数:4
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