In addition, we found that low‐dose Iloprost elevated platelet counts more significantly than high‐dose Iloprost in GPIbα antibody‐induced ITP, and that Iloprost at either high or low doses had no effect on platelet counts in healthy mice, although Iloprost inhibited platelet apoptosis. The gene discussed is GP1BA; the disease is autoimmune thrombocytopenic purpura.