Results 51 to 60 of about 3,657 (172)

Phosphorylation of mouse melanopsin by protein kinase A.

PLoS ONE, 2012
The visual pigment melanopsin is expressed in intrinsically photosensitive retinal ganglion cells (ipRGCs) in the mammalian retina, where it is involved in non-image forming light responses including circadian photoentrainment, pupil constriction ...
Joseph R Blasic, R Lane Brown, Phyllis R Robinson   +2 more
doaj   +1 more source

Cell-type expression and activation by light of neuropsins in the developing and mature Xenopus retina

Frontiers in Cellular Neuroscience, 2023
Photosensitive opsins detect light and perform image- or nonimage-forming tasks. Opsins such as the “classical” visual opsins and melanopsin are well studied.
Lawrence L. H. Man, Samuel S. Storey, Gabriel E. Bertolesi, Sarah McFarlane   +3 more
doaj   +1 more source

Melanopsin‐Mediated Post‐Illumination Pupillary Response in Idiopathic Rapid Eye Movement (REM) Sleep Behavior Disorder and Parkinson's Disease

Movement Disorders, EarlyView.
Abstract Aims To conduct a case–control study to investigate melanopsin‐mediated post‐illumination pupillary response (PIPR) in patients with Parkinson's disease (PD), video‐polysomnography‐confirmed isolated/idiopathic rapid eye movement (REM) sleep behavior disorder (iRBD), and age‐matched healthy controls (HC). Methods PIPR was measured at 6 s after
Joey W.Y. Chan, Bei Huang, Siyi Gong, Yuhua Yang, Shi Tang, Steven Wai‐ho Chau, Ngan Yin Chan, Tim Man‐ho Li, Yaping Liu, Anne Y.Y. Chan, Karen K.Y. Ma, Shirley X. Li, Joshua Tsoh, Kelvin K.L. Chong, Kathryn A. Roecklein, Vincent C.T. Mok, Yun Kwok Wing   +16 more
wiley   +1 more source

Extraocular Photoreception in Optic Lobes, Suckers, and Skin of Octopus vulgaris

Integrative Zoology, EarlyView.
Evidence of extra‐ocular photoreception in Octopus vulgaris (a) Diagram of the O. vulgaris different tissues considered: SPB, sucker proximal big; SPL, sucker proximal large; SM, sucker medium; SD, sucker distal; SK, skin; OL, optic lobes; RT, retina; (b‐d) Gene expression analysis of Ov‐GRK1 (red), Ov‐retinochrome (green), Ov‐rhodopsin (blue) mRNA ...
Valeria Maselli, Al‐Sayed Al‐Soudy, Mariangela Norcia, Stefania Galdiero, Sara Palladino, Emanuela Cirillo, Gianluca Polese, Anna Di Cosmo   +7 more
wiley   +1 more source

Light-induced fos expression in intrinsically photosensitive retinal ganglion cells in melanopsin knockout (opn4) mice.

PLoS ONE, 2009
Retinal ganglion cells that express the photopigment melanopsin are intrinsically photosensitive (ipRGCs) and exhibit robust synaptically driven ON-responses to light, yet they will continue to depolarize in response to light when all synaptic input from
Gary E Pickard, Scott B Baver, Malcolm D Ogilvie, Patricia J Sollars   +3 more
doaj   +1 more source

The Ecology of Human Sleep (EcoSleep) Cohort Study: Protocol for a longitudinal repeated measurement burst design study to assess the relationship between sleep determinants and outcomes under real‐world conditions across time of year

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary The interplay of daily life factors, including mood, physical activity, or light exposure, influences sleep architecture and quality. Laboratory‐based studies often isolate these determinants to establish causality, thereby sacrificing ecological validity.
Anna M. Biller, Nayab Fatima, Chrysanth Hamberger, Laura Hainke, Verena Plankl, Amna Nadeem, Achim Kramer, Martin Hecht, Manuel Spitschan   +8 more
wiley   +1 more source

NMDA Receptors Contribute to Retrograde Synaptic Transmission from Ganglion Cell Photoreceptors to Dopaminergic Amacrine Cells

Frontiers in Cellular Neuroscience, 2017
Recently, a line of evidence has demonstrated that the vertebrate retina possesses a novel retrograde signaling pathway. In this pathway, phototransduction is initiated by the photopigment melanopsin, which is expressed in a small population of retinal ...
Lei-Lei Liu, Nathan J. Spix, Dao-Qi Zhang   +2 more
doaj   +1 more source

Blue Light Exposure During Sleep in Type 1 Diabetes: Impacts on Glycemic Control and Psychosocial Health

Journal of Sleep Research, EarlyView.
ABSTRACT Light exposure at night is linked to increased risk for obesity and insulin resistance in the general population. While sleep health is recognized as a key component of diabetes management, there has been less emphasis on nighttime light exposure. This study aimed to investigate the effects of blue and white light exposure immediately prior to
Seok Jin Hong, Sarida Pratuangtham, Pamela Martyn‐Nemeth, Alana D. Steffen, Chang Gi Park, Sirimon Reutrakul   +5 more
wiley   +1 more source

The effects of spectrum, irradiance, and duration of exposure on light‐induced melatonin suppression in healthy adults

Photochemistry and Photobiology, EarlyView.
The left panel reports the measured time course data of melatonin concentration in the blood plasma of 17 BL‐Rs and 15 BL‐NRs at baseline, during a two‐hour stay in the dark, during a one‐hour light exposure to blue light, and again in the dark. The right panel shows the magnitude of melatonin concentration after 60 min of exposure to warm white, cool ...
Helmut Piazena, Leonora Franke, Ralf Uebelhack, Thomas Penzel, Ingo Fietze   +4 more
wiley   +1 more source

Biophysical Variation within the M1 Type of Ganglion Cell Photoreceptor

Cell Reports, 2017
Summary: Intrinsically photosensitive retinal ganglion cells of the M1 type encode environmental irradiance for functions that include circadian and pupillary regulation.
Alan J. Emanuel, Kush Kapur, Michael Tri H. Do   +2 more
doaj   +1 more source