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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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Photoreceptive net in the mammalian retina. This mesh of cells may explain how some blind mice can still tell day from night.

TL;DR: In this article, an expansive photoreceptive net was discovered in the mouse inner retina, visualized by using an antiserum against melanopsin, a likely photopigment.
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Melatonin-Depleted Blood from Premenopausal Women Exposed to Light at Night Stimulates Growth of Human Breast Cancer Xenografts in Nude Rats

TL;DR: These mechanistic studies are the first to provide a rational biological explanation for the increased breast cancer risk in female night shift workers and show that the tumor growth response to exposure to light during darkness is intensity dependent and that the human nocturnal, circadian melatonin signal not only inhibits human breast cancer growth but that this effect is extinguished by short-term ocular exposure to bright, white light at night.
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Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans

TL;DR: It is demonstrated that increasing irradiances of narrowband blue-appearing light can elicit increasing plasma melatonin suppression in healthy subjects, and narrow bandwidth blue LED light may be stronger than 4,000 K white fluorescent light for suppressing melatonin.
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Sensitivity of the human circadian system to short-wavelength (420-nm) light.

TL;DR: The aim of this work was to quantify the sensitivity of human volunteers to monochromatic 420-nm light for plasma melatonin suppression and clarify the visible short-wavelength sensitivity of the humanmelatonin suppression action spectrum.
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Photic Regulation of Melatonin in Humans: Ocular and Neural Signal Transduction

TL;DR: Acute, light-induced suppression of melatonin is proving to be a powerful tool for clarifying how elements of ocular and neural physiology influence the interaction between light and the secretion ofmelatonin from the human pineal gland.