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pubmed-article:11276369pubmed:abstractTextCytokine-mediated expansion has been proposed and successfully used to facilitate engraftment post transplantation. This study examined whether cryopreservation following expansion has a detrimental effect on the ability of cells to engraft, using the NOD-SCID mouse model. Cord blood (CB) CD34(+) cells were incubated for 7 days with stem cell factor (SCF), flt-3 ligand (FL), and megakaryocyte growth and development factor (MGDF). Expanded CD34(+) cells were transplanted into NOD-SCID mice either fresh or following cryopreservation and thawing. After thawing, recovery of nucleated cells was 94%, of CD34 cells was 63%, and of day-14 progenitors was 17%. The loss of day-14 progenitor cells among the thawed expanded cells did not influence the kinetics of human engraftment in the mouse. Bone marrow (BM) of mice transplanted with thawed expanded CD34(+) cells (14 +/- 3.9%) showed significantly higher levels of human engraftment than mice transplanted with fresh expanded CD34(+) cells (1.5 +/- 0.5%, p = 0.0064). Thawed expanded CD34(+) cells had significantly higher SCID Engrafting Potential (SEP) than freshly expanded CD34(+) cells (p < 0.001). Results suggest that prior cryopreservation does not prevent expanded cells engrafting in NOD-SCID mice.lld:pubmed
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pubmed-article:11276369pubmed:authorpubmed-author:RiceA MAMlld:pubmed
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pubmed-article:11276369pubmed:pagination157-65lld:pubmed
pubmed-article:11276369pubmed:dateRevised2007-11-15lld:pubmed
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pubmed-article:11276369pubmed:year2001lld:pubmed
pubmed-article:11276369pubmed:articleTitlePrior cryopreservation of ex vivo-expanded cord blood cells is not detrimental to engraftment as measured in the NOD-SCID mouse model.lld:pubmed
pubmed-article:11276369pubmed:affiliationChildren's Cancer Institute Australia for Medical Research, Sydney Children's Hospital, Randwick, NSW, Australia. A.Rice@unsw.edu.aulld:pubmed
pubmed-article:11276369pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11276369pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:11276369pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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