The purpose of this clinical trial is to investigate the safety of human placental-derived stem cells (HPDSC) given in conjunction with umbilical cord blood (UCB) stem cells in patients with various malignant or nonmalignant disorders who require a stem cell transplant. Patients will get either full dose (high-intensity) or lower dose (low intensity) chemo- and immunotherapy followed by a stem cell transplantation with UCB and HPDSC.
By observation of the inpatients in shenzhen people's hospital,research the curative effect of the two chemotherapy schemes on AML-High dose of cytarabine and HAM.
The purpose of this study is to provide an opportunity for patients with malignancies or bone marrow failure states who lack a suitable sibling donor to undergo allogeneic hematopoietic progenitor cell transplantation using cells from unrelated individuals or cord blood registries.