Collection of peripheral blood hematopoietic progenitors (PBHP) from patients with severe aplastic anemia (SAA) after prolonged administration of granulocyte colony-stimulating factor.

Abstract

The aim of this study was to test whether prolonged administration of granulocyte colony-stimulating factor (G-CSF) would allow the collection by leukapheresis of PBHP in patients with SAA. For this purpose, nine SAA patients, 7 to 46 years old, six of whom were enrolled at diagnosis of their disease and three after previous immunosuppression had failed, were treated with antilymphocyte globulin (ALG) (day 1 to 5), cyclosporin A (5 mg/kg/d orally) (day 6 to 90) and G-CSF 5 micrograms/kg/d (day 6 to 90). A total of 40 leukaphereses were performed, (range 2 to 7 per patient), between days +10 and +168 from G-CSF treatment. White blood cell count at the time of harvest ranged from 1.2 to 18.1 x 10(9)/L. Results can be summarized as follows: the median number of cells collected per patient was 5.0 x 10(8)/kg (range 2.6 to 18.7), the median number of CD34+ cells was 1.8 x 10(6)/kg (range 0.27 to 3.8) and the median number of colony-forming units granulocyte-macrophage (CFU-GM) was 3.9 x 10(4)/kg (range 0 to 39). Twenty leukaphereses performed between days +33 and +77 of G-CSF treatment grew granulocyte macrophages and erythroid colonies in vitro. No colony growth was obtained from 20 leukaphereses performed before day +33 or after day +80. In six patients the total number of CFU-GM recovered were in the range described for autologous peripheral blood stem cell grafts. (2.6 to 39 x 10(4)/kg). In conclusion, this study suggests that circulating hematopoietic progenitors can be recovered after ALG priming and after at least 1 month of G-CSF treatment in a proportion of patients with SAA. Whether these cells will be suitable for autologous transplantation remains to be determined.

• Authors: A Bacigalupo, G Piaggio, M Podestá, M T Van Lint, M Valbonesi, G Lercari, P G Mori, M Pasino, E Franchini, L Rivabella
• Journal: Blood (Blood) Vol. 82 Issue 5 Pg. 1410-4 (Sep 01 1993) ISSN: 0006-4971 [Print] United States
• PMID: 7689868 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antigens, CD
• Antigens, Surface
• Antilymphocyte Serum
• Granulocyte Colony-Stimulating Factor
• Cyclosporine

Topics

• Adolescent
• Adult
• Anemia, Aplastic (blood, drug therapy)
• Antigens, CD (analysis)
• Antigens, Surface (analysis, genetics)
• Antilymphocyte Serum (therapeutic use)
• Child
• Child, Preschool
• Cyclosporine (therapeutic use)
• Female
• Granulocyte Colony-Stimulating Factor (administration & dosage)
• Hematopoietic Stem Cells (cytology, drug effects)
• Humans
• Lymphocyte Depletion
• Male
• Middle Aged
• Phenotype
• T-Lymphocytes (cytology)
• Time Factors