期刊
EUROPEAN JOURNAL OF NEUROSCIENCE
卷 14, 期 7, 页码 1177-1180出版社
WILEY
DOI: 10.1046/j.0953-816x.2001.01749.x
关键词
behavioral rhythm; Clock mutant mice; methamphetamine; suprachiasmatic nucleus
It is well established that the Clock gene is essential for expressing circadian activity rhythms in mammals under constant darkness. The Clock gene product is a positive component of a molecular feedback loop which is assumed to generate the circadian rhythm. On the other hand, chronic treatment of methamphetamine (MAP) induces locomotor activity rhythm in a circadian domain, which is independent of the suprachiasmatic nucleus (SCN) and is driven by a pacemaker outside the SCN. However, it is not known whether the pacemaker outside the SCN possesses a similar molecular mechanism to that in the SCN. Here we show that MAP restores locomotor activity rhythm in arrhythmic homozygous Clock mutant (Clock/Clock) mice under constant darkness. This result indicates that the Clock mutation does not affect the MAP-induced locomotor rhythm.
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