title: Unraveling stem cell and progenitor subsets in autologous grafts according to methods of mobilization: implications for prediction of hematopoietic recovery.
abstract: OBJECTIVE
  In the autologous setting, granulocyte colony-stimulating factor (G-CSF) (G), or, when failing, G plus plerixafor (G+P), are common regimens for mobilization of stem cells into peripheral blood. To delineate mobilization effects on graft composition and hematopoietic recovery, we compared contents of stem cells and progenitor cells in products of G+P- and G patients. Paired samples of G+P patients and prior insufficient G mobilization were available for analyses.
  
  
  METHODS
  Subset analyses of grafts were performed by flow cytometry and myeloid colony-forming assay. In search of new markers to ascertain graft quality, we determined the fractions of aldehyde dehydrogenase bright (ALDH(br)) cells.
  
  
  RESULTS
  G grafts contained higher percentages of CD34+ cells, CD34+CD38- cells, and committed progenitors (CD34+CD38+) compared with G+P grafts. A detailed characterization of the mobilized CD34+ cell subset showed higher percentages of CD38- among the CD34+ cells of the G+P group (P = 0.032). In contrast, the CD34+ cell subset in G grafts was characterized by a higher percentage of ALDH(br) cells (P < 0.0001). Studying engraftment and day +100 graft function the G and G+P transplanted patients were comparable with respect to neutrophils, whereas in platelets they differed. In the prediction of engraftment and hematopoietic recovery, the dose of infused ALDH(br) cells correlated best to both platelet (r = 0.565, P = 0.002) and neutrophil reconstitution (r = 0.366, P = 0.06).
  
  
  CONCLUSIONS
  Besides showing dissimilar distributions of CD34+CD38- cells and progenitors in G and G+P grafts, this study further designated ALDH(br) as a promising marker in determination and prediction of graft quality and hematopoietic recovery.
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Anne Stidsholt
authors.initials: AS
authors.lastname: Roug
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Lea Bjerre
authors.initials: LB
authors.lastname: Hokland
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Erik
authors.initials: E
authors.lastname: Segel
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Katrine
authors.initials: K
authors.lastname: Nielsen
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Marie
authors.initials: M
authors.lastname: Toft-Petersen
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Peter Buur
authors.initials: PB
authors.lastname: Van Kooten Niekerk
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark.
authors.forename: Peter
authors.initials: P
authors.lastname: Hokland
authors.affiliation: Aarhus University Hospital, Department of Hematology, Aarhus, Denmark. Electronic address: lnederby@ki.au.dk.
authors.forename: Line
authors.initials: L
authors.lastname: Nederby
mesh_terms: D051997:ADP-ribosyl Cyclase 1; D000444:Aldehyde Dehydrogenase / Q000378:metabolism; D018952:Antigens, CD34 / Q000378:metabolism; D001596:Benzylamines; D015415:Biomarkers / Q000378:metabolism; D002469:Cell Separation; D000080027:Cyclams; D005434:Flow Cytometry; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology; D006410:Hematopoiesis; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006571:Heterocyclic Compounds / Q000494:pharmacology; D006801:Humans; D009504:Neutrophils / Q000276:immunology*; D011379:Prognosis; D020127:Recovery of Function; D013234:Stem Cells / Q000145:classification / Q000166:cytology*; D014182:Transplantation, Autologous
chemical_list: D018952:Antigens, CD34; D001596:Benzylamines; D015415:Biomarkers; D000080027:Cyclams; D006571:Heterocyclic Compounds; D016179:Granulocyte Colony-Stimulating Factor; D000444:Aldehyde Dehydrogenase; D051997:ADP-ribosyl Cyclase 1; C088327:plerixafor
keywords: G-CSF; aldehyde dehydrogenase; hematopoietic stem cell transplantation; plerixafor