title: Mobilization and collection of peripheral blood CD34+ cells from patients with Fanconi anemia.
abstract: A potential therapeutic option for patients with Fanconi anemia is collection of peripheral blood stem cells prior to the development of severe pancytopenia. These hematopoietic cells potentially could be infused when symptomatic bone marrow failure develops, as autologous rescue after chemotherapy in the event of leukemic transformation, or as targets for gene therapy. Eight patients with Fanconi anemia were mobilized with 10 microg/kg per day of granulocyte colony-stimulating factor (median, 10 +/- 4 days) to determine the feasibility of collecting peripheral blood stem cells for future use. Six patients achieved a peripheral blood CD34+ count of > or = 6/microL and underwent apheresis. The collection goal was 2 x 10(6) CD34+ cells/kg based on a predicted weight 5 years from the date of collection. A mean of 2.6 +/- 0.9 x 10(6) CD34+ cells/kg of the weight at the time of collection were collected, which corresponded to 1.9 +/- 0.4 x 10(6) CD34+ cells/kg of the target weight. The collections required a mean of 4 +/- 3 days (range, 2-8 days) of apheresis. Six of the 8 subjects had > or = 1 x 10(6) CD34+ cells/kg cryopreserved based on both actual and target weights, and 4 subjects had > or = 2 x 10(6) CD34+ cells/kg cryopreserved based on the target weight. These results suggest that some patients with Fanconi anemia can have adequate numbers of CD34+ cells mobilized and collected from the peripheral blood prior to the onset of severe bone marrow failure, but they may require an extended mobilization and multiple days of collection.
authors.affiliation: Section of Pediatric Hematology/Oncology, Department of Pediatrics, Riley Hospital for Children, Indianapolis, IN 46202, USA. jcroop@iupui.edu
authors.forename: J M
authors.initials: JM
authors.lastname: Croop
authors.forename: R
authors.initials: R
authors.lastname: Cooper
authors.forename: C
authors.initials: C
authors.lastname: Fernandez
authors.forename: V
authors.initials: V
authors.lastname: Graves
authors.forename: S
authors.initials: S
authors.lastname: Kreissman
authors.forename: H
authors.initials: H
authors.lastname: Hanenberg
authors.forename: F O
authors.initials: FO
authors.lastname: Smith
authors.forename: D A
authors.initials: DA
authors.lastname: Williams
mesh_terms: D000293:Adolescent; D000328:Adult; D018952:Antigens, CD34 / Q000032:analysis; D001772:Blood Cell Count; D001781:Blood Component Removal; D001793:Blood Preservation; D002648:Child; D002675:Child, Preschool; D015925:Cryopreservation; D005199:Fanconi Anemia / Q000097:blood* / Q000628:therapy; D005240:Feasibility Studies; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000009:adverse effects / Q000494:pharmacology*; D019650:Hematopoietic Stem Cell Mobilization / Q000379:methods*; D006801:Humans; D008297:Male; D010146:Pain / Q000209:etiology
chemical_list: D018952:Antigens, CD34; D016179:Granulocyte Colony-Stimulating Factor