The results showed that on 14 day, either absolute number of Lin−CD48−/CD150+ cells (6.61±0.754×104 vs 12.742±0.258×104, P<0.0001, n = 4), or percentage of Lin−CD48−CD150+ cells in MNCs (0.6175±0.0338% vs 0.745±0.0648%, P = 0.013, n = 4) was significantly lower in the GvHD group vs BMT group. The gene discussed is SLAMF1; the disease is graft versus host disease.