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

doi:10.3181/00379727-185-42538

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

Department of Cell Systems & Anatomy

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	219-222
Number of pages	4
Journal	Proceedings of the Society for Experimental Biology and Medicine
Volume	185
Issue number	2
DOIs	https://doi.org/10.3181/00379727-185-42538
State	Published - Jun 1987

ASJC Scopus subject areas

General Biochemistry, Genetics and Molecular Biology

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title = "Nocturnal Increase in the Sensitivity of the Syrian Hamster Pineal Gland to Isoproterenol Is Darkness Dependent",

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.",

author = "Reiter, {R. J.} and M. Puig-Domingo and Guerrero, {J. M.} and A. Gonzalez-Brito",

note = "Funding Information: Supported by Spanish-American Grant CCA8309-108. 3 Funding Information: Supported by NSF Grant DEB 8410592, by Spanish-North American Grant CCA8309-108, and by NIH Center Grant HD 10202. 2 Funding Information: Supported by a grant from the Fulbright Commission.",

year = "1987",

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doi = "10.3181/00379727-185-42538",

language = "English (US)",

volume = "185",

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journal = "Proceedings of the Society for Experimental Biology and Medicine",

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T1 - Nocturnal Increase in the Sensitivity of the Syrian Hamster Pineal Gland to Isoproterenol Is Darkness Dependent

AU - Reiter, R. J.

AU - Puig-Domingo, M.

AU - Guerrero, J. M.

AU - Gonzalez-Brito, A.

N1 - Funding Information: Supported by Spanish-American Grant CCA8309-108. 3 Funding Information: Supported by NSF Grant DEB 8410592, by Spanish-North American Grant CCA8309-108, and by NIH Center Grant HD 10202. 2 Funding Information: Supported by a grant from the Fulbright Commission.

PY - 1987/6

Y1 - 1987/6

N2 - 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.

AB - 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.

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

Abstract

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