The first successful case of stem cell therapy in human was reported in 1959. Bone marrow restorations were observed in leukemia patients who received total body irradiation subsequent by intravenous injection of their twins’ bone marrow (Thomas et al, 1957). Nevertheless, that effect was transient and the following bone marrow transplantation attempts in non-twin patients and donors can eventually lead to patient’s death from graft-versus-host disease (Mathé et al, 1965). During that time, the safety of hematopoietic cells transplantation was not guaranteed because of the limited knowledge in human histocompatibility and immunosuppression. However, the turning point came after the discovery of human leucocyte antigen (HLA) groups (Dausset, 1958; van Rood et al, 1958), HLA typing and compatibility testing were performed prior to the transplantation. In addition, the improvement of immunosuppressive protocol also helps bringing the bone marrow transplantation to become more and more successful (Donnall and Hutchinson, 1999).
Although the success rate of hematopoietic stem cell therapy was great, patients’ mortality still happened as a result of some factors. Besides from graft-versus-host disease which have previously mentioned, infection contributes for most cases of patient death (Kernan et al, 1993). In allogen...
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...there are some risk factors in using stem cell for therapeutic approaches, hematopoietic stem cell therapy by bone marrow transplantation has already been proofed to be safe if donors’ background and screening, cell contamination, HLA matching and opportunistic or nosocomial infections during immunocompromised period were carefully monitored and controlled. Still, other types of stem cell therapies, despite of their good therapeutic efficacy, are remain in experimental stage and need more data to support and demonstrate the safety in clinical trials. More understanding of stem cell biology is also required in order to keep stem cell under controlled and avoid some complications that they might cause. So, to pave the way for successful stem cell therapy, research in this extent is needed to pursue to maximized therapeutic efficiency with highest safety in patients.
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