Cholecystokinin-A receptors regulate photic input pathways to the circadian clock

Takao Shimazoe, Mitsutaka Morita, Shinichiro Ogiwara, Tomoyoshi Kojiya, Junpei Goto, Masaki Kamakura, Takahiro Moriya, Kazuyuki Shinohara, Soichi Takiguchi, Akira Kono, Kyoko Miyasaka, Akihiro Funakoshi, Masayuki Ikeda

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Daily behaviors are strongly dominated by internally generated circadian rhythms, but the underlying mechanisms remain unclear. In mammals, photoentrainment of behaviors to light-dark cycles involves signaling from both intrinsically photosensitive retinal ganglion cells and classic photoreceptor pathways to the suprachiasmatic nucleus (SCN). How classic photoreceptor pathways work with the photosensitive ganglion cells, however, is not fully understood. Although cholecystokinin (CCK) peptide has been shown to be present in a variety of vertebrate retinas, its function at a systems level is also unknown. In the present study we examined a possible role of CCK-A receptors in photoentrainment using CCK-A receptor knockout mice. The lacZ reporter gene within a gene-knockout cassette revealed precise localization of CCK-A receptors in the circadian clock system. We demonstrated that CCK-A receptors were located predominately on glycinergic amacrine cells but were rarely found on SCN neurons. Moreover, Ca2+ imaging analysis demonstrated that the CCK-A agonist, CCK-8 sulfate (CCK-8s), mobilized intracellular Ca2+ in amacrine cells but not glutamate-receptive SCN neurons. Furthermore, light pulse-induced mPer1/mPer2 gene expression in SCN, behavioral phase shifts, and the pupillary reflex were significantly reduced in CCK-A receptor knockout mice. These data indicate a novel function of CCK-A receptors in the nonimage-forming photoreception presumably via amacrine cell-mediated signal transduction pathways.

Original languageEnglish
Pages (from-to)1479-1490
Number of pages12
JournalFASEB Journal
Volume22
Issue number5
DOIs
Publication statusPublished - May 1 2008

Fingerprint

Cholecystokinin A Receptor
Circadian Clocks
Clocks
Suprachiasmatic Nucleus
Amacrine Cells
Cholecystokinin
Knockout Mice
Neurons
Genes
Pupillary Reflex
Signal transduction
Gene Knockout Techniques
Lac Operon
Mammals
Retinal Ganglion Cells
Photoperiod
Circadian Rhythm
Reporter Genes
Gene expression
Phase shift

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

Cite this

Shimazoe, T., Morita, M., Ogiwara, S., Kojiya, T., Goto, J., Kamakura, M., ... Ikeda, M. (2008). Cholecystokinin-A receptors regulate photic input pathways to the circadian clock. FASEB Journal, 22(5), 1479-1490. https://doi.org/10.1096/fj.07-9372com

Cholecystokinin-A receptors regulate photic input pathways to the circadian clock. / Shimazoe, Takao; Morita, Mitsutaka; Ogiwara, Shinichiro; Kojiya, Tomoyoshi; Goto, Junpei; Kamakura, Masaki; Moriya, Takahiro; Shinohara, Kazuyuki; Takiguchi, Soichi; Kono, Akira; Miyasaka, Kyoko; Funakoshi, Akihiro; Ikeda, Masayuki.

In: FASEB Journal, Vol. 22, No. 5, 01.05.2008, p. 1479-1490.

Research output: Contribution to journalArticle

Shimazoe, T, Morita, M, Ogiwara, S, Kojiya, T, Goto, J, Kamakura, M, Moriya, T, Shinohara, K, Takiguchi, S, Kono, A, Miyasaka, K, Funakoshi, A & Ikeda, M 2008, 'Cholecystokinin-A receptors regulate photic input pathways to the circadian clock', FASEB Journal, vol. 22, no. 5, pp. 1479-1490. https://doi.org/10.1096/fj.07-9372com
Shimazoe, Takao ; Morita, Mitsutaka ; Ogiwara, Shinichiro ; Kojiya, Tomoyoshi ; Goto, Junpei ; Kamakura, Masaki ; Moriya, Takahiro ; Shinohara, Kazuyuki ; Takiguchi, Soichi ; Kono, Akira ; Miyasaka, Kyoko ; Funakoshi, Akihiro ; Ikeda, Masayuki. / Cholecystokinin-A receptors regulate photic input pathways to the circadian clock. In: FASEB Journal. 2008 ; Vol. 22, No. 5. pp. 1479-1490.
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