Phototransduction molecules in the pigeon deep brain

Yasutaka Wada, Toshiyuki Okano, Yoshitaka Fukada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Photoreceptive areas responsible for the regulation of photoperiodicity have been localized in the brain of some avian species. We found that immunoreactivities to rhodopsin and the α-subunit of rod-type transducin (Gt1α) were colocalized in cerebrospinal fluid (CSF) contacting neurons in the pigeon lateral septum, a possible site for photoreception. Furthermore, RT-PCR analyses showed specific gene expression of both cGMP-phosphodiesterase β-subunit and cone-type cGMP-gated cation channel α-subunit in this region. These results suggest that several components in rod/cone photoreceptors compositely contribute to the deep encephalic phototransduction cascade. (C) 2000 Wiley-Liss, Inc.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalJournal of Comparative Neurology
Issue number1
Publication statusPublished - 2000 Dec 4
Externally publishedYes


  • CGMP-gated cation channel
  • CGMP-phosphodiesterase
  • Cerebrospinal fluid-contacting neuron
  • Photoperiodicity
  • Rhodopsin
  • Transducin

ASJC Scopus subject areas

  • Neuroscience(all)


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