Interferon protects normal human granulocyte/macrophage colony-forming cells from Ara-C cytotoxicity

Carol M Richman, C. A. Slapak, B. Toh

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Interferons (IFN) have clinical efficacy in certain hematologic malignancies. Combining IFN with conventional cytotoxic agents has been proposed as a means of improving therapy for diseases such as chronic myelogenous leukemia (CML). In this study, we examined the effect of recombinant interferons alone and in combination with Ara-C on normal and leukemic human hematopoietic progenitor cells (CFU-GM) in vitro. Mononuclear cells from normal bone marrow, peripheral blood of patients with CML, or the acute nonlymphocytic leukemia cell line HL-60 were incubated with α-, β-, or γ-IFN (0-1,000 units/ml) followed by the addition of Ara-C. The survival of normal CFU-GM was significantly increased if cells were treated with IFN 1 h before 3 h of Ara-C exposure. Similar IFN pretreatment of CML and HL-60 progenitors failed to protect leukemic CFU-GM from Ara-C-induced toxicity. This selective protection of normal CFU-GM may have clinical application.

Original languageEnglish (US)
Pages (from-to)570-575
Number of pages6
JournalJournal of Biological Response Modifiers
Issue number6
StatePublished - 1990
Externally publishedYes


  • Ara-C
  • Chemotherapy
  • Granulocyte/macrophage colony-forming cells
  • Interferon
  • Leukemia

ASJC Scopus subject areas

  • Cancer Research
  • Immunology
  • Pharmacology


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