Nocturnal Increase in the Sensitivity of the Syrian Hamster Pineal Gland to Isoproterenol Is Darkness Dependent

R. J. Reiter, M. Puig-Domingo, J. M. Guerrero, A. Gonzalez-Brito

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

The sensitivity of the Syrian hamster pineal gland to stimulation by isoproterenol is greatly increased in the latter half of the daily dark phase. This increased sensitivity requires a period of dark exposure for up to 6.5 hr. Also, if dark-maintained hamsters are exposed to light in the latter half of the night pineal melatonin levels drop precipitously but can be restimulated by isoproterenol administration. As the interval of light exposure continues, however, the pineal Sensitivity to isoproterenol decreases.

Original languageEnglish (US)
Pages (from-to)219-222
Number of pages4
JournalProceedings of the Society for Experimental Biology and Medicine
Volume185
Issue number2
DOIs
StatePublished - Jun 1987

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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