Licht-im-Terrarium: Literaturdatenbank
Licht-im-Terrarium: Literaturdatenbank |
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Amira, S., & Robinson, B. (1995). Ultraviolet light entrains rodent suprachiasmatic nucleus pacemaker. Neuroscience, 69(4), 1005–1011. Added by: Sarina (2009-08-24 16:09:55) |
| Resource type: Journal Article DOI: 10.1016/0306-4522(95)00393-W BibTeX citation key: Amira1995 View all bibliographic details  |
Categories: Englisch = English Keywords: Chronobiologie = Chronobiology, Säugetiere = Mammals, Sehvermögen = Visual Perception, Ultraviolett = Ultraviolet Creators: Amira, Robinson Collection: Neuroscience |
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| Abstract |
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It has long been assumed that, in contrast to other vertebrates, mammals are ultraviolet blind.12 Recent evidence indicates, however, that the spectral sensitivity of the retina in rodents extends into the ultraviolet range.14–16 This finding, combined with reports that ultraviolet light can suppress nocturnal melatonin release2 and reverse the effect of short photoperiod on the gonads,3 invites speculation about the role of ultraviolet light in photoperiodic control of physiological and behavioral functions. One idea is that ultraviolet light participates in retinally mediated processes underlying photic entrainment of a pacemaker located in the hypothalamic suprachasmatic nucleus that generates circadian rhythms.29 Consistent with such a function, we now show that ultraviolet light is capable of inducing phase shifts in circadian rhythms in the rat and of inducing in the hypothalamic suprachiasmatic nucleus expression of the transcription factor Fos, a known cellular correlate of fight-induced phase shifts of the hypothalamic suprachiasmatic nucleus pacemaker.6,18,28,30 Keywords: circadian rhythms; Fos immunohistochemistry; ultraviolet photoreceptors; rat; hamster Added by: Sarina |