N-methyladenosine (mA) is the most prevalent eukaryotic messenger RNA modification. Diabetic cataract (DC) is caused by high glucose (HG) in diabetes mellitus. However, the regulatory mechanism of mA in the DC pathogenesis is poorly understood. In present research, we performed the mA-RNA immunoprecipitation sequencing (MeRIP-Seq) analysis and detected the mA modification profile in the HG- or normal glucose (NG)-induced human lens epithelial cells (HLECs). Results revealed that methyltransferase-like 3 (METTL3) was upregulated in the DC tissue specimens and HG-induced HLECs. Besides, total mA modification level was higher in the HG-induced HLECs. Functionally, METTL3 knockdown promoted the proliferation and repressed the apoptosis of HLECs induced by HG. MeRIP-Seq analysis revealed that ICAM-1 might act as the target of METTL3. Mechanistically, METTL3 targets the 3′ UTR of ICAM-1 to stabilize mRNA stability. In conclusion, this research identified the regulation of METTL3 in the HG-induced HLECs, providing a potential insight of the mA modification for DC.Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.
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