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Viability of umbilical cord blood mononuclear cell subsets until 96 hours after collection
Author(s) -
PereiraCunha Fernanda G.,
Duarte Adriana S.S.,
Costa Fernando F.,
Saad Sara T.O.,
LorandMetze Irene,
Luzo Angela C.M.
Publication year - 2013
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/trf.12078
Subject(s) - andrology , cord blood , umbilical cord , viability assay , clonogenic assay , peripheral blood mononuclear cell , cd34 , stem cell , haematopoiesis , immunology , blood units , transplantation , lymphocyte , medicine , cell , biology , in vitro , microbiology and biotechnology , blood transfusion , biochemistry
Background Umbilical cord blood ( UCB ) is a good source of hematopoietic stem cells for transplantation and cell therapy. In 2006, the B razilian P ublic N etwork of C ord B lood B anks was founded; however, because our country is large, logistic problems could hamper the collection of numerous samples. Our aim was to evaluate the viability of several UCB cell subsets until 96 hours after collection, to examine whether this delay would be acceptable for processing and freezing the samples. Study Design and Methods Two experiments were performed: in the first one, volume reduction of the UCB units was carried out before analysis. In the second one, analysis was carried out with no previous manipulation. Samples were stored at room temperature and one aliquot was taken daily for analysis. We examined CD 34+ cell, B ‐cell precursor, mature B and T lymphocyte, monocyte, granulocyte, and mesenchymal stem cell ( MSC s) concentrations. Results Thirty‐six UCB units were analyzed. CD 34+ cells and mature T lymphocytes increased (viability 99%). Mature B lymphocytes and MSC s decreased, maintaining viability. Granulocytes decreased with loss of viability. Monocytes and immature B lymphocytes remained stable. Clonogenic assays showed a decrease in colony‐forming unit ( CFU ) number in UCB units stored for 96 hours. Conclusion UCB manipulation did not influence cell viability. All cell subsets remained viable until 96 hours after collection. CD 34+ cells and T lymphocytes increased, probably due to the loss of other subsets. CFU growth during the period analyzed and confirmed stem cell functionality, despite the decrease at 96 hours. Results demonstrated that UCB units could probably be processed up to 96 hours after collection.