Enhancement of drug cytotoxicity by recruitment of leukemic myeloblasts with humoral stimulation

Judith Karp, P. J. Burke

Research output: Contribution to journalArticle

Abstract

To demonstrate that the effect of 1 β D arabinofuranosylcytosine can be increased when the leukemic cell growth fraction is augmented by induced humoral factors, bone marrow cells from 14 patients with acute myeloblastic leukemia were studied in vitro. Cells were cultured in either pooled stimulatory serum, obtained from leukemic patients undergoing chemotherapy, or autologous leukemic pretreatment serum. After 2 days in culture, serum containing 1 β D arabinofuranosylcytosine was added. Cells cultured in stimulatory serum proliferated markedly when compared with cells cultured in pretreatment serum, as measured by tritiated thymidine incorporation into an acid insoluble precipitate, tritiated thymidine labeling indices, and viable tumor cell counts. The cytotoxic effect of 1 β D arabinofuranosylcytosine was enhanced in those cells initially cultured in stimulatory serum relative to cells initially cultured in pretreatment serum. These studies are consistent with the hypothesis that induced humoral stimulation of acute myeloblastic leukemic cells in vitro recruits a greater tumor growth fraction and thereby increases the cytotoxicity of cycle dependent drugs.

Original languageEnglish (US)
Pages (from-to)3600-3603
Number of pages4
JournalCancer Research
Volume36
Issue number10
StatePublished - 1976

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Granulocyte Precursor Cells
Cultured Cells
Serum
Cytarabine
Pharmaceutical Preparations
Thymidine
Growth
Acute Myeloid Leukemia
Bone Marrow Cells
Neoplasms
Cell Count
Drug Therapy
Acids

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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Enhancement of drug cytotoxicity by recruitment of leukemic myeloblasts with humoral stimulation. / Karp, Judith; Burke, P. J.

In: Cancer Research, Vol. 36, No. 10, 1976, p. 3600-3603.

Research output: Contribution to journalArticle

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