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METTL3 mediated m6A modification of HKDC1 promotes renal injury and inflammation in lead nephropathy
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METTL3 mediated m6A modification of HKDC1 promotes renal injury and inflammation in lead nephropathy
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Journal Article
METTL3 mediated m6A modification of HKDC1 promotes renal injury and inflammation in lead nephropathy
2025
Overview
Environmental and industrial Pb exposure poses a significant public health challenge. Acute exposure to high Pb concentrations can result in renal injury. Here, we revealed that N6-methyladenosine (m6A) RNA methylation was significantly upregulated in lead nephropathy and was mainly mediated by the methyltransferase METTL3. Functionally, METTL3 knockout in renal tubular epithelial cells or AAV9-mediated METTL3 silencing alleviated renal injury and the inflammatory response induced by lead acetate. METTL3 silencing in renal tubular epithelial cells reduced both m6A RNA methylation and inflammatory responses following lead acetate treatment. We identified hexokinase domain-containing 1 (HKDC1), known to function in the glycolytic pathway, as a direct METTL3 target. Importantly, HKDC1 was upregulated at both mRNA and protein levels after lead acetate treatment, thereby promoting renal injury and inflammation. Mechanistically, HKDC1 binds to ATPB and antagonizes the ubiquitinase Murf1, thereby leading to increased expression of ATPB and activation of the NF-κB signaling pathway, which promotes renal inflammation. We further confirmed that STM2457, an inhibitor of METTL3, protected against renal injury and inflammation induced by lead acetate. Collectively, our study demonstrated that the METTL3/HKDC1 axis is a potential target for the treatment of lead nephropathy, and STM2457 is expected to be a protective agent against renal injury caused by lead acetate.
Publisher
Ivyspring International Publisher
