例如:"lncRNA", "apoptosis", "WRKY"

Inhibition of microRNA-129-5p expression ameliorates ultraviolet ray-induced corneal epithelial cell injury via upregulation of EGFR.

J. Cell. Physiol.2019 Jul;234(7):11692-11707. doi:10.1002/jcp.27837. Epub 2018 Dec 04
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摘要


Existing evidence has highlighted the effect of ultraviolet light radiation leading to corneal epithelium impairment. During this study, we aim to investigate the effect of microRNA-129-5p (miR-129-5p) on the wound healing process of corneal epithelial cells (CECs) induced by ultraviolet rays in mice by targeting epidermal growth factor receptor (EGFR). First, mouse models of ultraviolet ray-induced CEC injury were established and intrastromally injected with different mimic, inhibitor, and short interfering RNA (siRNA) to detect the effect of miR-129-5p on CEC injury. Subsequently, the corneal tissues were obtained to detect the antioxidant ability and EGFR-positive expression rate. The dual-luciferase reporter gene assay was used to test whether EGFR could directly target miR-129-5p. To further investigate the specific mechanism of miR-129-5p and EGFR in CEC injury, CECs were cultured and transfected with miR-129-5p mimic, miR-129-5p inhibitor, siRNA-EGFR, and miR-129-5p inhibitor + siRNA-EGFR. miR-129-5p has been proven to directly target EGFR. Inhibition of miR-129-5p is able to increase the antioxidant capacity, EGFR-positive rate and the expressions of EGFR, B-cell lymphoma-2, zonula occluden-1, occludin, and keratinocyte growth factor-2, but decrease the expression of vascular endothelial growth factor, BCL2-associated X protein, interleukin (IL)-1β, and IL-4. Inhibition of miR-129-5p arrests cells at the S and G2 phases and decreases apoptosis. Our study provides evidence stating that inhibiting miR-129-5p and upregulating EGFR could aid in the repair of mice CEC injury induced by ultraviolet radiation. Therefore, inhibition of miR-129-5p might provide a basic theory in the repair of CEC injury caused by ultraviolet rays.

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