Figure 6. Immune cell infiltration analysis of HC and OA based on ssGSEA algorithm. (A) Immune infiltration analysis of 23 type immune cells by ssGSEA. (B) Principal components analysis (PCA) between HC and OA groups. (C–E) Correlation analysis of three diagnostic biomarkers (JUN, NFKB1A and LTC4S) and immune microenvironment.