Lack of circadian regulation of in vitro melatonin release from the pineal organ of salmonid teleosts.

@article{Iigo2007LackOC,
  title={Lack of circadian regulation of in vitro melatonin release from the pineal organ of salmonid teleosts.},
  author={Masayuki Iigo and Tomotaka Abe and Saori Kambayashi and Kaoru Oikawa and Tomohiro Masuda and Kanta Mizusawa and Shōji Kitamura and Teruo Azuma and Yasuaki Takagi and Katsumi Aida and Tadashi Yanagisawa},
  journal={General and comparative endocrinology},
  year={2007},
  volume={154 1-3},
  pages={
          91-7
        }
}
In many teleost species, the photoreceptive pineal organ harbors the circadian clock that regulates melatonin release in the pineal organ itself. However, the pineal organ of three salmonids (rainbow trout Oncorhynchus mykiss, masu salmon Oncorhynchus masou, and sockeye salmon Oncorhynchus nerka) did not exhibit circadian rhythms in melatonin release when maintained under constant darkness (DD) in vitro, suggesting that the pineal organs of all salmonids lack the circadian regulation of… CONTINUE READING
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