help button home button Endocrine Society Endocrinology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Copyright Permission
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Panke, E. S.
Right arrow Articles by Reiter, R. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Panke, E. S.
Right arrow Articles by Reiter, R. J.

Endocrinology, Vol 104, 194-197, Copyright © 1979 by Endocrine Society

ARTICLES

Pineal melatonin concentrations in the Syrian hamster

ES Panke, MD Rollag and RJ Reiter

Pineal melatonin concentrations exhibited a marked diurnal rhythmicity in gold hamsters maintained in a light-dark cycle of 15 h of light and 10 h of darkness. When tissue was collected at 3-h intervals throughout a 24-h period, daytime levels of 95--232 pg/pineal gland rose to concentrations of 760--1335 pg/pineal gland (P greater than 0.001 vs. all other values) at 0400 h, 8 h after the onset of darkness. When tissue was collected sequentially during the dark phase, pineal melatonin concentrations remained significantly elevated from 0200-- 0500 h (P less than 0.01 and P less than 0.001 vs. daytime values, respectively). Superior cervical ganglionectomy abolished the rhythm of pineal melatonin concentrations, and the concentrations were maintained at 60--105 pg/pineal gland throughout a 24-hr period.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1979 by The Endocrine Society