Figure 7

Correlation analysis of MMP9 with RA. (A) ROC curves of MMP9 in the training set and the validation set. (B) GSEA analysis of core gene MMP9. (C) Implementation of the CIBERSORT algorithm to explore the differences in immune microenvironment between RA and normal samples. (D) Graph of core gene and immune cell correlation analysis. MMP9 is almost significantly correlated with the microenvironment of differential expression obtained by immune infiltration analysis.