PMID- 30703361 OWN - NLM STAT- MEDLINE DCOM- 20200221 LR - 20200221 IS - 1090-2430 (Electronic) IS - 0014-4886 (Linking) VI - 314 DP - 2019 Apr TI - Retinoid x receptor modulation protects against ER stress response and rescues glaucoma phenotypes in adult mice. PG - 111-125 LID - S0014-4886(18)30333-9 [pii] LID - 10.1016/j.expneurol.2019.01.015 [doi] AB - Retinoid X receptors (RXRs) play an important role in transcription, are involved in numerous cellular networks from cell proliferation to lipid metabolism and are essential for normal eye development. RXRs form homo or heterodimers with other nuclear receptors, bind to DNA response elements and regulate several biological processes including neurogenesis. Mounting evidence suggests that RXR activation by selective RXR modulators (sRXRms) may be neuroprotective in the central nervous system. However, their potential neuroprotective role in the retina and specifically in glaucoma remains unexplored. This study investigated changes in RXR expression in the human and mouse retina under glaucomatous stress conditions and investigated the effect of RXR modulation on the RGCs using pharmacological approaches. RXR protein levels in retina were downregulated in both human glaucoma and experimental RGC injury models while RXR agonist, bexarotene treatment resulted in upregulation of RXR expression particularly in the inner retinal layers. Retinal electrophysiological recordings and histological analysis indicated that inner retinal function and retinal laminar structure were preserved upon treatment with bexarotene. These protective effects were associated with downregulation of ER stress marker response upon bexarotene treatment under glaucoma conditions. Overall, retinal RXR modulation by bexarotene significantly protected RGCs in vivo in both acute and chronic glaucoma models. CI - Copyright (c) 2019 Elsevier Inc. All rights reserved. FAU - Dheer, Yogita AU - Dheer Y AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. Electronic address: yogita.dheer@hdr.mq.edu.au. FAU - Chitranshi, Nitin AU - Chitranshi N AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. FAU - Gupta, Veer AU - Gupta V AD - School of Medicine, Deakin University, Melbourne, Australia. FAU - Sharma, Samridhi AU - Sharma S AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. FAU - Pushpitha, Kanishka AU - Pushpitha K AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. FAU - Abbasi, Mojdeh AU - Abbasi M AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. FAU - Mirzaei, Mehdi AU - Mirzaei M AD - Department of Molecular Science, Macquarie University, North Ryde, NSW 2109, Australia. FAU - You, Yuyi AU - You Y AD - Save Sight Institute, Sydney University, Sydney, NSW 2000, Australia. FAU - Graham, Stuart L AU - Graham SL AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia; Save Sight Institute, Sydney University, Sydney, NSW 2000, Australia. FAU - Gupta, Vivek AU - Gupta V AD - Faculty of Medicine and Health Sciences, Macquarie University, F10A, 2 Technology Place, North Ryde, NSW 2109, Australia. Electronic address: vivek.gupta@mq.edu.au. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190128 PL - United States TA - Exp Neurol JT - Experimental neurology JID - 0370712 RN - 0 (Histone Deacetylase Inhibitors) RN - 0 (Neuroprotective Agents) RN - 0 (Retinoid X Receptors) RN - A61RXM4375 (Bexarotene) RN - EC 3.5.1.98 (Histone Deacetylases) SB - IM MH - Aged MH - Aged, 80 and over MH - Aging MH - Animals MH - Bexarotene/*pharmacology/*therapeutic use MH - Electroretinography MH - Endoplasmic Reticulum Stress/*drug effects MH - Female MH - Gene Expression/drug effects MH - Glaucoma/pathology/*prevention & control MH - Histone Deacetylase Inhibitors/therapeutic use MH - Histone Deacetylases/metabolism MH - Humans MH - In Vitro Techniques MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Neuroprotective Agents/*pharmacology/*therapeutic use MH - Phenotype MH - Retina/drug effects/metabolism/pathology MH - Retinoid X Receptors/*agonists/biosynthesis OTO - NOTNLM OT - Apoptosis OT - Bexarotene OT - ER stress OT - Glaucoma OT - HDAC OT - Retinoid-X-receptor EDAT- 2019/02/01 06:00 MHDA- 2020/02/23 06:00 CRDT- 2019/02/01 06:00 PHST- 2018/08/09 00:00 [received] PHST- 2018/11/23 00:00 [revised] PHST- 2019/01/22 00:00 [accepted] PHST- 2019/02/01 06:00 [pubmed] PHST- 2020/02/23 06:00 [medline] PHST- 2019/02/01 06:00 [entrez] AID - S0014-4886(18)30333-9 [pii] AID - 10.1016/j.expneurol.2019.01.015 [doi] PST - ppublish SO - Exp Neurol. 2019 Apr;314:111-125. doi: 10.1016/j.expneurol.2019.01.015. Epub 2019 Jan 28.