Compared to the normal group, TGF-β1 in kidney tissue was significantly increased in the DN group (p < 0.05, Figure 3b), while UCMSC could significantly downregulate the expression TGF-β1 (p < 0.05, Figure 3b), which showed that UCMSC could attenuate renal pathological injury in DN rats. The gene discussed is TGFB1; the disease is liver dysplastic nodule.