Author:
Anderson Don H.,Williams David S.,Neitz Jay,Fariss Robert N.,Fliesler Steven J.
Abstract
AbstractTunicamycin (TM), an inhibitor of dolichylphosphate-mediated protein glycosylation, was injected intravitreally into the eyes of diurnal rodents with cone-dominated retinas. Injection of 1 μg of the B2isomer led to a progressive degeneration of the photoreceptor outer segments and disruption of the RPE-photoreceptor interface that took place over a 10-day period. Cone outer segments were shortened by postinjection day 6 and virtually absent by day 9. The microvilli that normally protrude from the apical surface of the retinal pigment epithelium were replaced by a fringe of shortened processes. The other retinal layers showed no morphological evidence of disruption. Retinal sensitivity, as measured by electroretinographicb-wave threshold, showed a significant and progressive decline over the 10-day course of the experiment that paralleled the disruption of retinal morphology. These results suggest that TM leads to similar morphological and electrophysiological effects on rod and cone photoreceptors.
Publisher
Cambridge University Press (CUP)
Subject
Sensory Systems,Physiology
Cited by
17 articles.
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