M
Mark D. Rollag
Researcher at Thomas Jefferson University
Publications - 60
Citations - 9114
Mark D. Rollag is an academic researcher from Thomas Jefferson University. The author has contributed to research in topics: Melatonin & Pineal gland. The author has an hindex of 31, co-authored 60 publications receiving 8444 citations. Previous affiliations of Mark D. Rollag include Uniformed Services University of the Health Sciences.
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Journal ArticleDOI
The effect of daily injections and constant release implants of melatonin on the endogenous pineal melatonin rhythm in golden hamsters.
TL;DR: The results exclude a mode of action of exogenousmelatonin on the pineal melatonin rhythm as a basis for the testicular response to melatonin in hamsters, and pose some interesting questions of feedback regulation by melatonin on its own production and release.
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Effect of MR imaging on the normal human pineal body: measurement of plasma melatonin levels.
Jonathan S. Schiffman,Hugh M. Lasch,Mark D. Rollag,Adam E. Flanders,George C. Brainard,D. Lawrence Burk +5 more
TL;DR: MR imaging at field strengths known to modulate melatonin levels in rats did not suppress melatonin production in human subjects, and subjects exposed to light and MR imaging had no significant effects on cortisol levels.
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Immunoreactive S-antigen in cerebrospinal fluid: a marker of pineal parenchymal tumors?
Horst W. Korf,Jeffrey A. Bruce,Barbara Vistica,Mark D. Rollag,Bennett M. Stein,David C. Klein +5 more
TL;DR: Tests for S-antigen in CSF might be useful in characterizing and treating tumors of the pineal region and, when identified in conjunction with other markers, it might also help to better define pineal parenchymal tumors.
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The effect of polarized versus nonpolarized light on melatonin regulation in humans.
TL;DR: The human pineal gland is responsive to ocular exposure with polarized light in a dose-dependent manner similar to that of nonpolarized light, although no significant differences were detected between polarized and nonpolarsized light on melatonin regulation.
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Effect of acute light exposure upon melatonin content, NAT activity, and nuclear volume in the gerbil pineal complex.
TL;DR: The deep pineal gland did not demonstrate a response in melatonin content, NAT activity, or pinealocyte nuclear volumes upon exposure of gerbils to light at the time of the nocturnal peak in superficial pineal activity.