title: Thawing of cryopreserved mobilized peripheral blood--comparison between waterbath and dry warming device.
abstract: BACKGROUND
  Thawing of cryopreserved mobilized peripheral blood (MPB) is routinely performed for autologous and allogeneic MPB transplantation. Usually thawing is achieved by submerging the cell bag in a waterbath (37 degrees C temperature). We compared the effectiveness of thawing cryopreserved MPB in a waterbath with an electric dry-warming device containing warmed gel pads (Sahara, Transmed).
  
  
  METHODS
  Two cryopreserved bags from each of 31 apheresis procedures were thawed in a waterbath and under dry conditions in parallel. Viability (dye exclusion), apoptosis/necrosis (annexin/propidiumiodide staining) and clonogenic potential (CFU-E plus BFU-E, CFU-GM) of the cells were tested after thawing.
  
  
  RESULTS
  Statistical analysis by Wilcoxon matched-pair test showed no significant difference between the thawing procedures in terms of the in vitro parameters tested.
  
  
  CONCLUSIONS
  Our results indicate that thawing of cryopreserved MPB using dry warming and water bath give similar viability, apoptosis/necrosis rate and clonogenic potential. Both procedures take about the same amount of time and are easy to perform. Nevertheless, the potentially decreased risk of bacterial contamination of either the cell product or the patient room, and guidelines of good clinical practice (GCP), favor the use of the dry warming procedure.
authors.affiliation: Medizinische Klinik und Poliklinik I, Universitätsklinikum Carl Gustav Carus an der TU Dresden, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Röllig
authors.forename: J
authors.initials: J
authors.lastname: Babatz
authors.forename: I
authors.initials: I
authors.lastname: Wagner
authors.forename: A
authors.initials: A
authors.lastname: Maiwald
authors.forename: V
authors.initials: V
authors.lastname: Schwarze
authors.forename: G
authors.initials: G
authors.lastname: Ehninger
authors.forename: M
authors.initials: M
authors.lastname: Bornhäuser
mesh_terms: D002470:Cell Survival; D015925:Cryopreservation / Q000295:instrumentation / Q000379:methods*; D004389:Durable Medical Equipment; D006361:Heating / Q000295:instrumentation* / Q000379:methods*; D019650:Hematopoietic Stem Cell Mobilization; D006801:Humans; D036102:Peripheral Blood Stem Cell Transplantation / Q000379:methods; D017410:Practice Guidelines as Topic; D013234:Stem Cells / Q000378:metabolism*; D014021:Tissue Preservation / Q000295:instrumentation / Q000379:methods; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water