期刊
CELLULAR AND MOLECULAR LIFE SCIENCES
卷 67, 期 1, 页码 99-111出版社
SPRINGER BASEL AG
DOI: 10.1007/s00018-009-0155-7
关键词
Retina; Ganglion cells; Photoreception; Circadian rhythms; Opsin; Photosensitivity
Over the last ten years there has been growing acceptance that retinal photoreception among mammals extends beyond rods and cones to include a small number of intrinsically photosensitive retinal ganglion cells (ipRGCs). These ipRGCs are capable of responding to light in the absence of rod/cone input thanks to expression of an opsin photopigment called melanopsin. They are specialised for measuring ambient levels of light (irradiance) for a wide variety of so-called non-image-forming light responses. These include synchronisation of circadian clocks to light:dark cycles and the regulation of pupil size, sleep propensity and pineal melatonin production. Here, we provide a review of some of the landmark discoveries in this fast developing field, paying particular emphasis to recent findings and key areas for future investigation.
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