After being cocultured with the UC-MSCs, the percentage of B10 and CD19+/CD24hi/CD38hi cells in CD 19+ B cells of ITP elevated (2.61 ± 0.48% vs. 5.48 ± 0.73% and 1.52 ± 0.38% vs. 5.18 ± 0.85%) signally (Figures 3(a) and 3(b), Supplementary 3). The gene discussed is CD19; the disease is autoimmune thrombocytopenic purpura.