%0 Journal Article %T Reconstitution of adaptive immunity after umbilical cord blood transplantation: impact on infectious complications %A Servais, Sophie %A Hannon, Muriel %A de Latour, Régis Peffault %A Socie, Gérard %A Beguin, Yves %J Stem Cell Investigation %D 2017 %B 2017 %9 %! Reconstitution of adaptive immunity after umbilical cord blood transplantation: impact on infectious complications %K %X In comparison with allogeneic stem cell transplantation (alloHSCT) with other stem cell sources, umbilical cord blood transplantation (UCBT) was traditionally associated with increased risk of infections, particularly during the first 3 months after transplantation. Longitudinal studies of immune monitoring reported peculiar patterns of T- and B-cell recovery in the peripheral blood of UCB recipients during the first months post-transplantation. Overall, current data suggest delayed reconstitution of naive and memory CD4 + and CD8 + T-cell pools after UCBT. This is particularly true for adult recipients and for patients who received in vivo T-cell depleting approaches before the transplantation. Such delayed T-cell recovery may increase susceptibility of UCB recipients for developing opportunistic infections and viral reactivations. Regarding B-cell recovery, UCBT was associated with accelerated B-lymphopoiesis. Recent studies also reported evidence for faster functional memory B-cell recovery in UCB recipients. In this article, we briefly review T- and B-cell reconstitution after alloHSCT, with emphasis on peculiarities observed after UCBT. We further put these data in lines with risks of infections after UCBT. %U https://sci.amegroups.org/article/view/15019 %V 4 %N 5 %P %@ 2313-0792