Further exploring the association of DEGs and kidney function, the mRNA expressions of cytokines (CXCL1, CCL5, and CCL21) and collagens (COL1A1, COL1A2, and COL3A1) were observed to have a negative correlation with eGFR in DN patients (Figures 5(a)–5(f)). This evidence concerns the gene COL1A1 and liver dysplastic nodule.