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Combination with miR‐124a improves the protective action of BMSCs in rescuing injured rat podocytes from abnormal apoptosis and autophagy

This in vitro study was performed to identify the role of miR‐124a in bone marrow stromal stem cells (BMSCs) therapy for H2O2‐induced rat podocyte injury, and determine whether combination treatment with miR‐124a could improve the protective effect of BMSCs. Cell viability of podocytes was detected by CCK‐8 assay. Detection of ROS level, apoptotic rate, and autophagy rate was carried out using flow cytometry assays. Oxidative stress parameters were analyzed using the ELISA assays. MiR‐124a and mRNA levels were determined using real‐time PCR. Protein expression was detected using Western blotting. Our study revealed a pivotal role of miR‐124a in the protective action of BMSCs on podocyte injury driven by oxidative stress. BMSCs could rescue injured podocytes from aberrant apoptosis and autophagy by regulating cleaved caspase‐3, Bax, Bcl‐2, LC3‐II/I, and p62. Suppression of the PI3 K/Akt/mTOR signaling pathway is likely one of the main mechanisms underlying the protective action of BMSCs transfected with miR‐124a. Our study revealed that miR‐124a further improves the protective effect of BMSCs in injured podocytes. Thus, the combination of BMSCs and microRNAs could be a beneficial treatment for renal diseases in the near future.