The mRNA expressions of fibrogenesis- and inflammation-related factors in the renal tissues in rat DN models. Quantitative real-time PCR was performed to assess the mRNA expression levels of TGF-β1 (A), MCP-1 (B), CTGF (C), and VDR (D), in the renal tissues in DN, on day 3, 14, and 37, after the lentiviral injection. Compared with control models at the same time point, *P < 0.05; compared with vehicle-treated group at the same time point, #P < 0.05.