The effect in vitro of 2'-deoxycytidine on the metabolism and cytotoxicity of 2',3'-dideoxycytidine

K. N. Bhalla, L. Gongrong, S. Grant, J. T. Cole, W. W. MacLaughlin, D. J. Volsky

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We examined in vitro the effect of high, but clinically achievable and non-toxic, concentrations of 2′-deoxycytidine (dCyd) (≥ 100μmol/l) on the metabolism and cytotoxicity of 2′,3′-dideoxycytidine (DDC) in normal human bone marrow mononuclear cells (BMMCs) and a cultured T-lymphocyte (HUT-102) cell line. Colony formation in semi-solid medium by bone marrow progenitor cells (CFU-GM and CFU-GEMM) was significantly protected by dCyd against the cytotoxic effects of high doses of DDC. In contrast, in HIV-infected HUT-102 cells, anti-HIV effect of DDC (10 μmol/l) was preserved in the presence of 100 μmol/l dCyd but partially reversed by higher levels of dCyd. dCyd reduced the generation of DDC triphosphate (DDC-TP) relative to dCyd triphosphate (dCTP) pools to a significantly greater extent in BMMCs versus HUT-102 cells. This might explain dCyd-mediated abrogation of DDC cytotoxicity against marrow progenitor cells with relative preservation of its anti-HIV-1 activity in HUT-102 cells.

Original languageEnglish (US)
Pages (from-to)427-431
Number of pages5
Issue number5
StatePublished - 1990


  • 2′,3′-dideoxycytidine (DDC)
  • 2′-deoxycytidine (dCyd)
  • Colony-forming unit granulocyte
  • Colony-forming unit granulocyte-macrophage (CFU-GM)
  • Erythrocyte
  • Macrophage
  • Megakaryocyte (CFU-GEMM)(dCTP)

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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