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• W2102855222 abstract "Background Cord blood (CB) has long been regarded as an easily accessible source of hematopoietic progenitors suitable for transplantation, but its efficiency as a source of mesenchymal stromal cells (MSC) remains controversial. The aim of this study was to assess CB as a potential source of MSC, to determine the optimal culture requirements for CB MSC expansion and to compare their functional and immunophenotypic characteristics with bone marrow (BM) MSC from children. Methods Mononuclear cells from 18 full-term CB samples and 23 BM samples from children were set in culture under MSC-inducing conditions. Their immunophenotypic characteristics were assessed by flow cytometry and their differentiation potential was evaluated. Results Isolation of CB MSC was achieved in 25% of the samples cultured under optimal conditions: high initial cell concentration, fetal calf serum (FCS) enrichment of the culture medium, high FGF-2 concentration and high sample volume. Isolated CB MSC were morphologically similar to the ones derived from BM, but appeared late in culture. An adherent cell layer was formed and reached confluency in 34 days (passage 1; P1) and needed 55 days subsequently (from P1 to P2). CB MSC retained their characteristics for two successive passages. Immunophenotypic analysis showed no expression of CD34 and varying expression of CD45, ranging from 0% to 17.83%, and CD105, from 49% to 83%. CFU-F colonies developed in one case. Discussion These findings suggest that CB cannot be considered a sufficient source of MSC for clinical use, although easily accessible. Further research should aim for alternative sources. Cord blood (CB) has long been regarded as an easily accessible source of hematopoietic progenitors suitable for transplantation, but its efficiency as a source of mesenchymal stromal cells (MSC) remains controversial. The aim of this study was to assess CB as a potential source of MSC, to determine the optimal culture requirements for CB MSC expansion and to compare their functional and immunophenotypic characteristics with bone marrow (BM) MSC from children. Mononuclear cells from 18 full-term CB samples and 23 BM samples from children were set in culture under MSC-inducing conditions. Their immunophenotypic characteristics were assessed by flow cytometry and their differentiation potential was evaluated. Isolation of CB MSC was achieved in 25% of the samples cultured under optimal conditions: high initial cell concentration, fetal calf serum (FCS) enrichment of the culture medium, high FGF-2 concentration and high sample volume. Isolated CB MSC were morphologically similar to the ones derived from BM, but appeared late in culture. An adherent cell layer was formed and reached confluency in 34 days (passage 1; P1) and needed 55 days subsequently (from P1 to P2). CB MSC retained their characteristics for two successive passages. Immunophenotypic analysis showed no expression of CD34 and varying expression of CD45, ranging from 0% to 17.83%, and CD105, from 49% to 83%. CFU-F colonies developed in one case. These findings suggest that CB cannot be considered a sufficient source of MSC for clinical use, although easily accessible. Further research should aim for alternative sources." @default.
• W2102855222 created "2016-06-24" @default.
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• W2102855222 date "2008-01-01" @default.
• W2102855222 modified "2023-10-17" @default.
• W2102855222 title "Could cord blood be a source of mesenchymal stromal cells for clinical use?" @default.
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• W2102855222 doi "https://doi.org/10.1080/14653240701883079" @default.
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