Visualization of mPer1 transcription in vitro: NMDA induces a rapid phase shift of mPer1 gene in cultured SCN

Makoto Asai, Shun Yamaguchi, Hiromi Isejima, Masafumi Jonouchi, Takahiro Moriya, Shigenobu Shibata, Masaki Kobayashi, Hitoshi Okamura

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Abstract

Many physiological and behavioral phenomena are controlled by an internal, self-sustaining oscillator with a periodicity of approximately 24 hr. In mammals, the principal oscillator resides in the suprachiasmatic nucleus (SCN). A light pulse during the subjective night causes a phase shift of the circadian rhythm via direct glutamatergic retinal afferents to the SCN [1]. Along with the accepted theoretical models of the clock, it is suggested that behavioral resetting of mammals is completed within 2 hr [2]; however, the molecular mechanism has not been elucidated. Here, we show the real-time image of the transcription of the circadian-clock gene mPer1 in the cultured SCN by using the transgenic mice that carry a luciferase reporter gene under the control of the mPer1 promoter [3]. The real-time image demonstrates that the mPer1 promoter activity oscillates robustly in a circadian manner and that this promoter activity is reset rapidly (within 2-3 hr) when a phase shift occurs.

Original languageEnglish
Pages (from-to)1524-1527
Number of pages4
JournalCurrent Biology
Volume11
Issue number19
DOIs
Publication statusPublished - 2001 Oct 2

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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    Asai, M., Yamaguchi, S., Isejima, H., Jonouchi, M., Moriya, T., Shibata, S., Kobayashi, M., & Okamura, H. (2001). Visualization of mPer1 transcription in vitro: NMDA induces a rapid phase shift of mPer1 gene in cultured SCN. Current Biology, 11(19), 1524-1527. https://doi.org/10.1016/S0960-9822(01)00445-6