ACTA1 and scleroderma: In contrast to the WKYMVm-induced decrease of α-SMA+ILB4− myofibroblasts in BLM-induced scleroderma skin of wild type mice, WKYMVm treatment had no significant effect on the number of α-SMA+ILB4− myofibroblasts in the BLM-induced scleroderma skin of Fpr2 KO mice (Figures 6A,C).