PTPRC and gastroenteritis: The results showed that PD significantly reduces the MMP-7+ Ly6G+ neutrophils and MMP-7+ F4/80+ macrophages among MMP-7+ CD45+ infiltrating immune cells (Figs. 6B, D, and F), identifying a positive correlation between MMP-7 expression and leukocyte infiltration in DSS-induced intestinal inflammation.