Results 21 to 30 of about 14,467 (226)

Retinal transcriptome profiling identifies novel candidate genes associated with visual impairment in a mouse model of multiple sclerosis

open access: yesAnimal Cells and Systems, 2023
Visual impairment is occasionally observed in multiple sclerosis (MS) and its animal model, experimental autoimmune encephalomyelitis (EAE). Although uveitis and optic neuritis have been reported in MS and EAE, the precise mechanisms underlying the ...
Sungmoo Hong   +4 more
doaj   +1 more source

Phototransduction and the Evolution of Photoreceptors [PDF]

open access: yesCurrent Biology, 2010
Photoreceptors in metazoans can be grouped into two classes, with their photoreceptive membrane derived either from cilia or microvilli. Both classes use some form of the visual pigment protein opsin, which together with 11-cis retinaldehyde absorbs light and activates a G-protein cascade, resulting in the opening or closing of ion channels ...
Fain, Gordon L.   +2 more
openaire   +2 more sources

Expression of Opsins of the Box Jellyfish Tripedalia cystophora Reveals the First Photopigment in Cnidarian Ocelli and Supports the Presence of Photoisomerases

open access: yesFrontiers in Neuroanatomy, 2022
Cubomedusae, or box jellyfish, have a complex visual system comprising 24 eyes of four types. Like other cnidarians, their photoreceptor cells are ciliary in morphology, and a range of different techniques together show that at least two of the eye types—
Anders Garm   +3 more
doaj   +1 more source

Current issues in invertebrate phototransduction: Second messengers and ion conductances [PDF]

open access: yes, 1997
Investigation of phototransduction in invertebrate photoreceptors has revealed many physiological and biochemical features of fundamental biological importance. Nonetheless, no complete picture of phototransduction has yet emerged.
Bacigalupo Vicuña, Juan   +3 more
core   +1 more source

Drosophila Photo-transduction Simulator

open access: yesJournal of Open Research Software, 2013
This software contains detailed modelling of the single photon response, the  quantum bump, of fly photoreceptors. All known components participating in the primary phototransduction process are taken into account, and estimates are given for both the ...
Konstantin Nikolic, Joaquim Loizu
doaj   +1 more source

Phototransduction and light-iinducted mitochondrial activation in blowfly compound eyes [PDF]

open access: yes, 1992
The present thesis considered two aspects of phototransduction in the blowfly Calliphora vicina mutant chalky. First, we studied the mechanism of the basis process, conversion of light to an electrical signal.
Mojet, Martinus Hendrik
core   +2 more sources

A Single Residue Mutation in the Gαq Subunit of the G Protein Complex Causes Blindness in Drosophila

open access: yesG3: Genes, Genomes, Genetics, 2018
Heterotrimeric G proteins play central roles in many signaling pathways, including the phototransduction cascade in animals. However, the degree of involvement of the G protein subunit Gαq is not clear since animals with previously reported strong loss ...
Jinguo Cao   +10 more
doaj   +1 more source

Melanopsin phototransduction: beyond canonical cascades

open access: yes, 2021
Melanopsin is a visual pigment that is expressed in a small subset of intrinsically photosensitive retinal ganglion cells (ipRGCs). It is involved in regulating non-image forming visual behaviors, such as circadian photoentrainment and the pupillary ...
Robinson, Phyllis   +3 more
core   +1 more source

Functional Optical Coherence Tomography for Intrinsic Signal Optoretinography: Recent Developments and Deployment Challenges

open access: yesFrontiers in Medicine, 2022
Intrinsic optical signal (IOS) imaging of the retina, also termed as optoretinogram or optoretinography (ORG), promises a non-invasive method for the objective assessment of retinal function.
Tae-Hoon Kim   +4 more
doaj   +1 more source

Genomic organization, evolution, and expression of photoprotein and opsin genes in Mnemiopsis leidyi: a new view of ctenophore photocytes

open access: yesBMC Biology, 2012
Background Calcium-activated photoproteins are luciferase variants found in photocyte cells of bioluminescent jellyfish (Phylum Cnidaria) and comb jellies (Phylum Ctenophora).
Schnitzler Christine E   +14 more
doaj   +1 more source

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