Wang X, Tian Q, Li M, Liu Y. METTL5 triggers the ferroptosis of cardiomyocytes in sepsis-induced myocardial injury.
Free Radic Biol Med 2025;
237:1-10. [PMID:
40379158 DOI:
10.1016/j.freeradbiomed.2025.05.392]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2025] [Revised: 05/10/2025] [Accepted: 05/12/2025] [Indexed: 05/19/2025]
Abstract
Sepsis frequently precipitates a spectrum of serious organ dysfunction syndromes, notably inducing severe cardiac insufficiency. Emerging evidence have linked the roles of N6-methyladenosine (m6A) modification and ferroptosis to sepsis-induced myocardial injury. However, the potential mechanism of m6A regulator methyltransferase-like 5 (METTL5) in sepsis-induced myocardial injury is still unclear. In vivo rats' sepsis model, lipopolysaccharide (LPS) administration increased the level of METTL5 and m6A modification enrichment. In LPS-induced cardiomyocytes, METTL5 silencing (shRNA-METTL5) alleviated the lipid ROS accumulation, MDA, or iron overload, which also promoted cardiomyocytes' proliferation. The data indicated that METTL5 acted as a driver of ferroptosis in sepsis-induced myocardial injury. Mechanistically, METTL5 installed the m6A modification of NRF2 mRNA, and YTHDF2 targeted NRF2 mRNA to trigger its degradation. NRF2 could repress the ferroptosis in LPS-induced cardiomyocytes. Thus, METTL5 consequently accelerated the ferroptosis in sepsis-induced myocardial injury via YTHDF2/NRF2 axis and m6A-dependent manner. In summary, the findings revealed the function of METTL5 on LPS-induced cardiomyocytes ferroptosis, providing a potential therapeutic target for sepsis-induced myocardial injury.
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