期刊
OPTOMETRY AND VISION SCIENCE
卷 78, 期 6, 页码 425-430出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00006324-200106000-00015
关键词
aging; mouse; retina; electroretinogram; photoreceptor; rod; cone
资金
- NEI NIH HHS [R01 EY010609, EY-01792, EY-10609] Funding Source: Medline
Purpose. To define the physiological and structural changes that may accompany aging in the normal mouse retina. Methods, C57BL/6 mice were maintained under cyclic light for either 2, 6, or 12 months. After rod- and cone-mediated corneal electroretinograms (ERG's) were recorded from anesthetized animals, the retinal structure was quantitatively examined. Photoreceptor cell density was measured within 100-mum regions of the central superior and inferior retina. Cone photoreceptor subtypes were identified by immunocytochemistry. Results. The amplitudes of rod- and cone-mediated ERG's were reduced in older mice, although the overall ERG wave-form did not change appreciably and implicit times were not changed in an age-dependent fashion. In comparison, there was no significant age-related decline in rod or cone photoreceptor density. Conclusions. The amplitude of the mouse ERG declines with age. This change does not appear to reflect a change in the structural integrity of the photoreceptor cells. In functional studies of murine models of late-onset retinal disorders, it will be important to take these changes into consideration.
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