Inhibition of PRMT1 alleviates sepsis-induced acute kidney injury in mice by blocking the TGF-β1 and IL-6 trans-signaling pathways.
Yu ZhuLongmei WangRui LiuXiurong DingSong YinYuankun ChenChuanlong ZhuZheng WangWenting LiPublished in: FEBS open bio (2023)
Sepsis-induced acute kidney injury (SI-AKI) causes renal dysfunction and has a high mortality rate. Protein arginine methyltransferase-1 (PRMT1) is a key regulator of renal insufficiency. In this study, we explored the potential involvement of PRMT1 in SI-AKI. A murine model of SI-AKI was induced by cecal ligation and perforation (CLP). The expression and localization of PRMT1 and molecules involved in the TGF-β1/Smad3 and IL-6/STAT3 signaling pathways were detected in mouse kidney tissues by western blot, immunofluorescence, and immunohistochemistry. The association of PRMT1 with downstream molecules of the TGF-β1/Smad3 and IL-6/STAT3 signaling pathways were further verified in vitro in mouse renal tubular epithelial cells (mRTECs). CLP caused epithelial-mesenchymal transition (EMT), apoptosis, and inflammation in renal tissues, and this was alleviated by inhibition of PRMT1. Inhibition of PRMT1 in SI-AKI mice decreased the expression of TGF-β1 and phosphorylation of Smad3 in the renal cortex, and downregulated the expression of sIL-6R and phosphorylation of STAT3 in the medulla. Knockdown of PRMT1 in mRTECs restricted the expression of Cox-2, E-cad, Pro-caspase3 and p-Smad3 (involved in the TGF-β1-mediated signaling pathway), and blocked IL-6/sIL-6R, inducing the expression of Cox-2 and p-STAT3. In conclusion, our findings suggest inhibition of PRMT1 mitigates SI-AKI by inactivating the TGF-β1/Smad3 pathway in the cortex and IL-6/STAT3 pathway in the medulla. Our findings may aid in the identification of potential therapeutic target molecules for SI-AKI.
Keyphrases
- transforming growth factor
- epithelial mesenchymal transition
- acute kidney injury
- signaling pathway
- poor prognosis
- cardiac surgery
- pi k akt
- cell proliferation
- room temperature
- oxidative stress
- binding protein
- induced apoptosis
- gene expression
- high glucose
- cell death
- long non coding rna
- intensive care unit
- drug induced
- nitric oxide
- diabetic rats
- skeletal muscle
- metabolic syndrome
- risk factors
- coronary artery disease
- transcription factor
- protein kinase
- mouse model
- south africa