Dasatinib-treated mice exhibit a delay in platelet recovery after immune-induced thrombocytopenia. Whole-blood platelet count from control mice (solid line) and dasatinib-treated (5 mg/kg/d) mice (dashed line) were obtained, and then thrombocytopenia was induced by an intraperitoneal injection of anti–mouse GPIbα antibody (2 μg/g body weight). Platelet counts were then measured at the indicated times after injection. Error bars represent SEM; **P < .01; n = 5 for each time point.