PMID- 15183901 OWN - NLM STAT- MEDLINE DCOM- 20041223 LR - 20220321 IS - 0268-960X (Print) IS - 0268-960X (Linking) VI - 18 IP - 3 DP - 2004 Sep TI - Umbilical cord blood transplantation--how, when and for whom? PG - 167-79 AB - In recent years, umbilical cord blood (UCB) has emerged as a feasible alternative source of hematopoietic progenitors (CD34+) for allogeneic stem cell transplantation, mainly in patients who lack HLA-matched marrow donors. Since the first case reported in 1998, more than 3500 patients have received UCB transplants for a variety of malignant and non-malignant diseases. The vast majority of recipients were children with an average weight of 20 kg; however, more than 500 UCB transplantations (UCBTs) have already been performed in adults. The "naive" nature of UCB lymphocytes also permits the use of HLA-mismatched grafts at 1-2 loci without higher risk for severe graft versus host disease (GvHD) relative to bone marrow transplantation (BMT) from a full matched unrelated donor. Furthermore, UCB is rich in primitive CD16(-)CD56++ NK cells, which possess impressive proliferative and cytotoxic capacities and can be induced to expand using IL-12 or IL-15, so as to mount a substantial graft versus leukemia (GvL) effect. The main disadvantage of UCB is the low stem cell yields, resulting in higher rates of graft failure as well as delayed time to engraftment compared to BMT. One rational approach to overcome this limitation involves ex vivo expansion of UCB derived hematopoietic precursors. In this review we tried to answer the question: UCBT how, when and for whom. This procedure is mostly applicable for children and especially those with indication for full allogeneic transplantation but who lack a matched sibling donor. Experimental approaches including ex vivo expansion of CB with cocktail of hematopoietic growth factors, with or without differentiation blocking agents, co-transplantation of haploidentical and CB cells or co-transfusion of CB and mesenchymal cells may enable successful UCBT in adults and probably will result in expanding the indication to solid tumors or autoimmune disorders. FAU - Cohen, Yossi AU - Cohen Y AD - Institute of Hematology, Bone Marrow Transplantation and Cord Blood Bank, Chaim Sheba Medical Center, Tel Hashomer, Ramat-Gan 52621, Israel. FAU - Nagler, Arnon AU - Nagler A LA - eng PT - Journal Article PT - Review PL - England TA - Blood Rev JT - Blood reviews JID - 8708558 RN - 0 (Antigens, CD) RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Adolescent MH - Adult MH - Antigens, CD MH - Bone Marrow Transplantation/immunology/mortality MH - Child MH - Child, Preschool MH - *Cord Blood Stem Cell Transplantation/mortality MH - Female MH - Graft vs Host Disease/*prevention & control MH - *Graft vs Leukemia Effect MH - Hematologic Neoplasms/therapy MH - Histocompatibility Antigens Class I/immunology MH - Histocompatibility Testing MH - Humans MH - Infant MH - Killer Cells, Natural/immunology MH - Male MH - Middle Aged MH - Transplantation Conditioning MH - Transplantation Immunology MH - Treatment Outcome RF - 63 EDAT- 2004/06/09 05:00 MHDA- 2004/12/24 09:00 CRDT- 2004/06/09 05:00 PHST- 2004/06/09 05:00 [pubmed] PHST- 2004/12/24 09:00 [medline] PHST- 2004/06/09 05:00 [entrez] AID - S0268960X0300064X [pii] AID - 10.1016/S0268-960X(03)00064-X [doi] PST - ppublish SO - Blood Rev. 2004 Sep;18(3):167-79. doi: 10.1016/S0268-960X(03)00064-X.