Isolation, characterization and ex vivo expansion of CD34+ cells from umbilical cord blood

Mirella Pasino, Paola Biglino, Anna Corcione, Francesca Scuderi, Edoardo Franchini, Paola Tasso, Pierangela De Biasio, Fernando Marotta, Angelo Valetto, Vito Pistoia, Pier Giorgio Mori

Research output: Contribution to journalArticlepeer-review


Problem. Umbilical cord blood (UCB) represents an alternative to bone marrow or peripheral blood as a source of hemopoietic progenitors that can be transplanted in an autologous or allogeneic setting, particularly in children. Methods. UCB CD34+ cells were purified by magnetic cell sorting, analyzed by flow cytometry, tested for proliferative response and clonogenic capability in the presence of SCF+IL-6 (CSF2) or SCF+IL-6 + IL-3 + GM-CSF + G-CSF + EPO (CSF6). Results. Median CD34+ yield was 84.5%, median CD34+ population purity was 96%. The starting CD34+ population, that was predominantly CD38+, HLA-DR+ and CD33+, expanded 11-15 fold by CSF2 and 35-67 fold by CSF6 stimulation. The CD34+CD33+ and CD34-CD33+ subsets expanded more in the presence of the CSF2 than of the CSF6 combination. CSF6 was more efficient than CSF2 in increasing CFU-GM, CFU-E and/or BFU-E. Conclusions. These data suggest that a selective amplification of different types of hemopoietic progenitors may be obtained by varying cytokine combinations.

Original languageEnglish
Pages (from-to)151-159
Number of pages9
JournalCancer Research Therapy and Control
Issue number3
Publication statusPublished - 1998


  • Cytokines
  • Ex vivo expansion
  • Hemopoietic progenitors
  • Immunophenotype
  • Umbilical cord blood

ASJC Scopus subject areas

  • Cancer Research
  • Oncology


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