Document Detail

Leukapheresis components may be cryopreserved at high cell concentrations without additional loss of HPC function.
MedLine Citation:
PMID:  11061859     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The aim of this study was to assess the feasibility of freezing mobilized peripheral blood progenitor cell (PBPC) components at higher cell concentrations than are classically recommended for bone marrow. This approach might have potential benefits, such as lower cost of processing and storage and less risk of the complications associated with the transfusion of large component volumes and large quantities of DMSO. STUDY DESIGN AND METHODS: In the first phase, small aliquots of 19 apheresis components were cryopreserved at standard and higher cell concentrations (Aliquots A and B, respectively). In the second phase, 21 apheresis components were split into two bags each and frozen at standard (Bag A) and high (Bag B) cell concentrations. The differences in viability, cloning efficiency, and nucleated cell recovery in Bags A and B were examined. Finally, the hematologic recovery of 10 patients who underwent autologous transplantation with PBPC components frozen at high cell concentrations was analyzed. RESULTS: The median cell concentration at freezing was 94 (57-100) x 10(6) per mL and 291 (220-467) x 10(6) per mL for Aliquots A and B, respectively, and 90.9 (45.4-92) x 10(6) per mL and 332 (171-582) x 10(6) per mL for Bags A and B, respectively. The viability was significantly lower in samples frozen at higher cell concentrations: 92 versus 83 percent (p = 0.001) and 87 versus 77 percent (p<0.001) for Aliquots and Bags A and B, respectively. Significant differences were not observed in the recovery of total nucleated cells (102 vs. 101% and 98 vs. 105%) or the cloning efficiency after thawing (13 vs. 16% and 27 vs. 23%) for Aliquots and Bags A and B, respectively. The time to granulocyte engraftment >0.5 x 10(9) per L and platelet engraftment >20 x 10(9) per L was 9 (8-11) and 10.5 (7-21) days, respectively. CONCLUSION: The cryopreservation of PBPC components at standard concentrations and 3.3 (1.8-6.2)-fold cell concentrations has no adverse effect on the function of HPCs after thawing.
E Cabezudo; C Dalmases; M Ruz; J A Sanchez; C Torrico; C Sola; S Querol; J García
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Transfusion     Volume:  40     ISSN:  0041-1132     ISO Abbreviation:  Transfusion     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-11-03     Completed Date:  2000-11-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417360     Medline TA:  Transfusion     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1223-7     Citation Subset:  IM    
Department of Cryobiology and Cell Therapy, Cancer Research Institute, Hospital Duran i Reynals, Barcelona, Spain.
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MeSH Terms
Blood Preservation*
Cell Survival
Hematopoietic Stem Cell Transplantation
Hematopoietic Stem Cells / cytology,  physiology*

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