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Adv Exp Med Biol
2014 Jan 01;801:585-92. doi: 10.1007/978-1-4614-3209-8_74.
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Endoplasmic reticulum stress in vertebrate mutant rhodopsin models of retinal degeneration.
Kroeger H
,
LaVail MM
,
Lin JH
.
???displayArticle.abstract??? Rhodopsin mutations cause many types of heritable retinitis pigmentosa (RP). Biochemical and in vitro studies have demonstrated that many RP-linked mutant rhodopsins produce misfolded rhodopsin proteins, which are prone to aggregation and retention within the endoplasmic reticulum, where they cause endoplasmic reticulum stress and activate the Unfolded Protein Response signaling pathways. Many vertebrate models of retinal degeneration have been created through expression of RP-linked rhodopsins in photoreceptors including, but not limited to, VPP/GHL mice, P23H Rhodopsin frogs, P23H rhodopsin rats, S334ter rhodopsin rats, C185R rhodopsin mice, T17M rhodopsin mice, and P23H rhodopsin mice. These models have provided many opportunities to test therapeutic strategies to prevent retinal degeneration and also enabled in vivo investigation of cellular and molecular mechanisms responsible for photoreceptor cell death. Here, we examine and compare the contribution of endoplasmic reticulum stress to retinal degeneration in several vertebrate models of RP generated through expression of mutant rhodopsins.
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