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- W2045494596 abstract "Background aims Cord blood (CB) transplants with co-infusion of third-party donor (TPD) mobilized hematopoietic stem cells (MHSC) have been shown to result in ‘bridge’ engraftment with prompt neutrophil recovery and high final rates of CB engraftment and full chimerism. This strategy overcomes the limitation posed by low cellularity of CB units for unrelated transplants in adults. Enhancement of adaptive immunity reconstitution without increasing risks of graft-versus-host disease (GvHD) is required to optimize results further. Our objectives were to evaluate co-infusion of mesenchymal stromal cells (MSC) from the same TPD regarding tolerance, CB engraftment and effects on acute (a)GvHD, both preventive and therapeutic. Methods Ex vivo-expanded bone marrow MSC were infused at the time of the transplant or the in case of refractory aGvHD. Results Nine patients received 1.04–2.15 × 106/kg (median 1.20) MSC immediately after CB and TPD MHSC. Neither immediate adverse side-effects nor significant differences regarding CB engraftment or aGvHD development were observed. Four patients developed grade II aGvHD, refractory to steroids in two. These reached complete remission after therapeutic infusions of MSC. Conclusions In recipients of ‘dual CB/TPD MHSC transplants’, MSC infusions were therapeutically effective for severe aGvHD but no significant differences in CB engraftment and incidence of severe aGvHD were observed following their prophylactic use. Although results of this study alone cannot conclusively determine the application of MSC in CB transplantation, we believe that, in this setting, the best use of MSC could be as pre-emptive treatment for aGvHD. Cord blood (CB) transplants with co-infusion of third-party donor (TPD) mobilized hematopoietic stem cells (MHSC) have been shown to result in ‘bridge’ engraftment with prompt neutrophil recovery and high final rates of CB engraftment and full chimerism. This strategy overcomes the limitation posed by low cellularity of CB units for unrelated transplants in adults. Enhancement of adaptive immunity reconstitution without increasing risks of graft-versus-host disease (GvHD) is required to optimize results further. Our objectives were to evaluate co-infusion of mesenchymal stromal cells (MSC) from the same TPD regarding tolerance, CB engraftment and effects on acute (a)GvHD, both preventive and therapeutic. Ex vivo-expanded bone marrow MSC were infused at the time of the transplant or the in case of refractory aGvHD. Nine patients received 1.04–2.15 × 106/kg (median 1.20) MSC immediately after CB and TPD MHSC. Neither immediate adverse side-effects nor significant differences regarding CB engraftment or aGvHD development were observed. Four patients developed grade II aGvHD, refractory to steroids in two. These reached complete remission after therapeutic infusions of MSC. In recipients of ‘dual CB/TPD MHSC transplants’, MSC infusions were therapeutically effective for severe aGvHD but no significant differences in CB engraftment and incidence of severe aGvHD were observed following their prophylactic use. Although results of this study alone cannot conclusively determine the application of MSC in CB transplantation, we believe that, in this setting, the best use of MSC could be as pre-emptive treatment for aGvHD." @default.
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- W2045494596 date "2009-01-01" @default.
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- W2045494596 title "Results of a pilot study on the use of third-party donor mesenchymal stromal cells in cord blood transplantation in adults" @default.
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- W2045494596 doi "https://doi.org/10.1080/14653240902807018" @default.
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