科研之友
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摘要
BackgroundCryopreservation is often used to store cellular therapies, but little is known about how well CD3+ or CD34+ cells tolerate this process. Study Design and MethodsViable CD34+ cell recoveries were analyzed from related and unrelated donor granulocyte-colony-stimulating factor (G-CSF)-mobilized peripheral blood stem cell (PBSC) products and viable CD3+ cell recoveries from G-CSF-mobilized and nonmobilized apheresis products from related and unrelated donors. All products were cryopreserved with 5% dimethyl sulfoxide and 6% pentastarch using a controlled-rate freezer and were stored in liquid nitrogen. Related donor products were cryopreserved immediately after collection and unrelated donor products greater than 12 hours postcollection. ResultsThe postthaw recovery of CD34+ cells from related donor PBSCs was high (n=86; 97.523.1%) and there was no difference in postthaw CD34+ cell recovery from unrelated donor PBSCs (n=14; 98.8 +/- 37.2%; p=0.863). In related donor lymphocyte products the postthaw CD3+ cell recovery (n=48; 90.7 +/- 21.4%) was greater than that of unrelated donor products (n=14; 66.6 +/- 35.8%; p=0.00251). All unrelated donor lymphocyte products were from G-CSF-mobilized products, while most related donor lymphocyte products were from nonmobilized products. A comparison of the CD3+ cell recovery from related donor G-CSF-mobilized products (n=19; 85.0 +/- 29.2%) with that of unrelated donor products found no significant difference (p=0.137). ConclusionsThe postthaw recovery of CD34+ cells was high in both related and unrelated donor products, but the recovery of CD3+ cells in unrelated donor G-CSF-mobilized products was lower. G-CSF-mobilized unrelated donor products may contain fewer CD3+ cells than non-G-CSF-exposed products upon thaw and, when indicated, cell doses should be monitored.
- 出版日期2014-4
