Epigenetic Activation of Circadian Clock Genes Elicits Inflammation in Experimental Murine Dry Eye.

Autor:	Wei R; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Chen Q; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Zheng Q; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Reinach PS; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Tan X; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Pan C; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Xu W; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China., Tong L; Singapore Eye Research Institute, Singapore; Singapore National Eye Centre, Singapore; Duke-NUS Medical School, Singapore; Yong Loo Lin School of Medicine, Singapore; National University of Singapore, Singapore., Chen W; State Key Laboratory of Ophthalmology, Optometry and Vision Science, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
Jazyk:	angličtina
Zdroj:	Ocular immunology and inflammation [Ocul Immunol Inflamm] 2024 Sep; Vol. 32 (7), pp. 1180-1188. Date of Electronic Publication: 2023 May 10.
DOI:	10.1080/09273948.2023.2205525
Abstrakt:	Purpose: To explore whether circadian clock genes contribute to elicit inflammation in experimental dry eye (EDE). Methods: RNA sequencing analyzed mRNA expression patterns in EDE model. RT-qPCR and/or Western blot determined the expression of inflammatory factors and circadian genes during EDE. MethylTarget™ assays determined the promoter methylation levels of Per genes in vivo. Per2 or Per3 knockdown assessed their effects on inflammatory factors in vitro. Results: We utilized an intelligently controlled environmental system (ICES) to establish a mouse EDE model. The significant upregulated genes were enriched for circadian rhythms. Therein lied oscillatory and time-dependent upregulation of PER2 and PER3, as well as their promoter hypomethylation during EDE. Silencing PER2 or PER3 significantly decreased inflammatory factor expression and also reversed such increased inflammatory response in azacitidine (AZA) treatment in vitro model. Conclusions: Our findings suggest that DNA methylation mediated the upregulation of PER2 and PER3, leading to inflammatory response in EDE.
Databáze:	MEDLINE
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