To assess the effect of VEGF from 1%O2 hMSCs on renal fibrosis, we injected 1%O2 hMSCs transfected with VEGF siRNA or negative control siRNA into IRI rats (VEGF siRNA/1%O2 hMSC and NC siRNA/1%O2 hMSC groups, respectively). Here, VEGFA is linked to renal fibrosis.