期刊
NEUROBIOLOGY OF AGING
卷 25, 期 4, 页码 517-523出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2003.06.007
关键词
aging; circadian rhythm; clock; clock mutation
资金
- Howard Hughes Medical Institute Funding Source: Medline
- NIA NIH HHS [R01-AG-18200, R01 AG018200, P01 AG011412, P01-AG-11412] Funding Source: Medline
The amplitudes of many circadian rhythms, at the behavioral, physiological, cellular, and biochemical levels, decrease with advanced age. Previous studies suggest that the amplitude of the central circadian pacemaker is decreased in old animals. Recently it has been reported that expression of several circadian clock genes, including Clock, is lower in the master circadian pacemaker of old rodents. To test the hypothesis that decreased activity of a circadian clock gene renders animals more susceptible to the effects of aging, we analyzed the circadian rhythm of locomotor activity in young and old wild-type and heterozygous Clock mutant mice. We found that the effects of age and the Clock mutation were additive. These results indicate that age-related changes in circadian rhythmicity occur equally in wild-type and heterozygous Clock mutants, suggesting that the Clock mutation does not render mice more susceptible to the effects of age on the circadian pacemaker. 0 2003 Elsevier Inc. All rights reserved.
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