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AB035. Lactate receptor GPR81 modulates epigenetic modification in the subretina

Annals of Eye Science 2018年第1期 441-441页

作者： Xiaojuan Yang raphael rouget Tang Zhu Christiane Quiniou Shasha Lv Suna Jung Francois Duhamel Houda Tahiri Samy Omri Baraa Noueihed Xin Hou JoséCarlos Rivera Mathieu Nadeau-Vallée Pierre Lachapelle Sylvain Chemtob Department of Pharmacology McGill UniversityMontréalQCCanada Department of Pharmacology Universitéde MontréalMontréalQCCanada Research Center CHU Sainte-Justine Universitéde MontréalMontréalQCCanada Department of Ophthalmology and Neurology-Neurosurgery Montréal Children’s Hospital-Research InstituteMcGill UniversityMontréalQCCanada Research Center Hôpital Maisonneuve-Rosemont Universitéde MontréalMontréalQCCanada Department of Ophthalmology Universitéde MontréalMontréalQCCanada Department of Pediatrics Universitéde MontréalMontréalQCCanada

Background:Retinal pigment epithelium(RPE)is vital for the homeostasis of the subretina including photoreceptors and ***,our previous results suggested that the recently discovered lactate receptor GPR81 is abundantly expressed in *** date,only one previous study has shown that activating GPR81 could enhance DNA repair by activating ***,we investigated whether GPR81 exhibits epigenetic modification in the subretina by using GPR81−/−***:GPR81−/−mice and wide type littermates were generated on a background of C57BL/6J *** thicknesses of their choroid were evaluated by ***,Q-PCR,western blot and choroid sprout assay were *** vitro,primary retinal pigment epithelium(pRPE)cells were isolated from mice,and cultured for ***:The thickness of choroid was reduced in GPR81−/−mice compared to GPR81+/+mice,suggesting that GPR81 is important for the integrity of *** the choroid sprout assay,lactate treated RPE/choroid complex showed a significant increase in angiogenesis compared to controls while lactate treated KO RPE/choroid complex showed no difference compared to their *** Q-PCR,most of the genes screened elevated their expression in GPR81−/−mice compared to WT mice,suggesting epigenetic modification may exist,which were confirmed by histone acetylation and HDACs activity ***:Taking together,the lactate receptor GPR81 in RPE is very important for maintaining homeostasis of the *** novel discovery sheds new light on the relationship between metabolism and epigenetic modification.

关键词： Subretina GPR81 epigenetic modification

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