CXCL13 and diabetic foot: Fig7B and 7C displays the expression levels of CCL20, CXCL13, FGFR2, FGFR3, PI3, PLA2G2A, and S100A8 across the six cell types.The results showed that the key pathogenic genes of diabetic foot ulcer were mainly involved in keratinocytes and neutrophils.