Clock gene daily profiles and their phase relationship in the rat suprachiasmatic nucleus are affected by photoperiod.

@article{Sumov2003ClockGD,
  title={Clock gene daily profiles and their phase relationship in the rat suprachiasmatic nucleus are affected by photoperiod.},
  author={Alena Sumov{\'a} and Martin J{\'a}c and Martin Sl{\'a}dek and Ivo {\vS}auman and Helena Illnerov{\'a}},
  journal={Journal of biological rhythms},
  year={2003},
  volume={18 2},
  pages={134-44}
}
Rhythmicity of the rat suprachiasmatic nucleus (SCN), a site of the circadian pacemaker, is affected by daylength; that is, by the photoperiod. Whereas various markers of rhythmicity have been followed, so far there have been no studies on the effect of the photoperiod on the expression of the clock genes in the rat SCN. To fill the gap and to better understand the photoperiodic modulation of the SCN state, rats were maintained either under a long photoperiod with 16 h of light and 8 h of… CONTINUE READING

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