Characterization of clonogenic progenitors in autologous peripheral blood stem cell grafts: evaluation of a simple in vitro assay suitable for routine clinical use.

Abstract	Autologous peripheral blood stem cell (PBSC) transplantation has a low treatment-related morbidity and mortality when using appropriate criteria for patient selection and graft quality evaluation. It will be important to use simple and standardised procedures for evaluation of progenitor cell numbers when considering autografting in patients with malignant or non-malignant disorders and increased risk of prolonged posttransplant cytopenia. We determined the number of clonogenic cells in PBSC autografts after 7 days of in vitro culture, and these results were compared with both the total number of colonies and the numbers of colony subsets in conventional 14 days colony assays (colony-forming unit granulocyte-erythrocyte-macrophage-megakaryocyte, CFU-GEMM; CFU-E, CFU-GM; CFU-megakaryocyte). The total colony number after 7 days of culture correlated significantly with (i) the CD34+ cell number; (ii) the total colony number as well as the numbers of erythroid, nonerythroid and mixed colonies in a conventional assay using 14 days of culture; (iii) the number of megakaryocyte colonies. The total colony number after 7 days of in vitro culture is a simple in vitro parameter that seems to reflect the proliferative capacity of various progenitor subsets in PBSC autografts. This simple analysis may be used in combination with other in vitro techniques (e.g. estimation of stem cell viability and CD34+ cell subset analysis) for pretransplant evaluation of autografts. However, the possible clinical use of this parameter has to be examined in prospective clinical studies.
Authors	Dmitri Motorin, Anne Bakken, Jenny Foss Abrahamsen, Peter Ernst, Øystein Bruserud
Journal	Hematology (Amsterdam, Netherlands) (Hematology) Vol. 8 Issue 5 Pg. 313-8 (Oct 2003) ISSN: 1024-5332 [Print] England
PMID	14530173 (Publication Type: Evaluation Study, Journal Article)
Chemical References	Antigens, CD34
Topics	Antigens, CD34 (analysis) Cell Count Cell Culture Techniques Clone Cells (cytology) Colony-Forming Units Assay (methods, standards) Hematopoietic Stem Cells (cytology) Humans Peripheral Blood Stem Cell Transplantation (methods) Transplantation, Autologous

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