PTPRC and colitis: Development of colitis is initiated by the abnormal activation of the immune response and uncontrolled production of inflammatory cytokines, leading to the disruption of the intestinal barrier, intestinal dyshomeostasis, and destruction of mucosal integrity.[2] Here, CD45+ staining revealed greater immune cell infiltration in the colons of the littermate control mice than in the colons of the hAESCs‐treated mice (Figure 3a).