Licht-im-Terrarium: Literaturdatenbank
Licht-im-Terrarium: Literaturdatenbank |
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Meissi, H. (1997). Photic regulation of pineal function. analogies between retinal and pineal photoreception. Biology of the Cell, 89(9), 549–554. Added by: Sarina (2016-02-02 10:11:55) |
| Resource type: Journal Article DOI: 10.1111/j.1768-322X.1997.tb01031.x ID no. (ISBN etc.): 1768-322X BibTeX citation key: Meissi1997 View all bibliographic details  |
Categories: Englisch = English Keywords: Chronobiologie = Chronobiology, Netzhaut = Retina Creators: Meissi Collection: Biology of the Cell |
Views: 6/852 Views index: % Popularity index: 26% |
| Abstract |
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Light absorbed by a photopigment in a photoreceptor cell causes a photochemical reaction converting the 11-cis retinal chromophore into the all-trans configuration. These changes lead to a series of events that causes cGMP hydrolysis, a following decrease of cGMP in the cytoplasm of the photoreceptor outer segment and a closure of cGMP-gated cationic channels. As a consequence of these processes the membrane hyperpolarizes. In pineal photoreceptor cells of lower vertebrates these processes are only partly investigated. Molecules involved in the phototransduction process and the desensitization, like opsin, vitamin A, α-transducin and arrestin, have been immunocytochemically localized in pineal photoreceptors and also electrophysiological studies have shown that phototransduction mechanisms in pineal photoreceptors might be very similar to those found in retinal photoreceptors. This review will summarize some of the current knowledge on pineal photoreception and compare it with retinal processes.
Added by: Sarina |