Enhancement of in vivo antitumor activity of a novel antimitotic 1-phenylpropenone derivative, AM-132, by tumor necrosis factor-alpha or interleukin-6.

TK5048 and its derivatives, AM-132, AM-138, and AM-97, are recently developed antimitotic (AM) compounds. These 1-phenylpropenone derivatives induce cell cycle arrest at the G2 / M phase of the cell cycle. TK5048 inhibited tubulin polymerization in human lung cancer PC-14 cells in a concentration-dependent manner. In a polymerization assay using bovine brain tubulin, AM-132 and AM-138 were quite strong, AM-97 was moderately strong, and TK5048 was a relatively weak inhibitor of tubulin polymerization. A murine leukemia cell line resistant to a sulfonamide antimitotic agent, E7010, which binds to colchicine-binding sites on tubulin, was cross-resistant to the in vitro growth-inhibitory effect of AM compounds. Inhibition of tubulin polymerization is therefore one of the mechanisms of action of these AM compounds against tumor cells. To profile the antitumor effect of AM compounds, the in vivo antitumor effect of AM-132 was evaluated against cytokine-secreting Lewis lung carcinoma (LLC). Tumor-bearing mice were treated with intravenous AM-132 using three different treatment schedules. LLC tumors expressing tumor necrosis factor-alpha (TNF-alpha), granulocyte macrophage colony-stimulating factor (GM-CSF), or interleukin (IL)-6 were very sensitive to AM-132. In particular, LLC tumors expressing IL-6 were markedly reduced by AM-132 treatment, and showed coloring of the tumor surface and unusual hemorrhagic necrosis. These results suggest a combined effect of AM-132 and cytokines on the blood supply to tumors.
AuthorsY Tatsumi, H Arioka, S Ikeda, H Fukumoto, K Miyamoto, K Fukuoka, Y Ohe, N Saijo, K Nishio
JournalJapanese journal of cancer research : Gann (Jpn J Cancer Res) Vol. 92 Issue 7 Pg. 768-77 (Jul 2001) ISSN: 0910-5050 [Print] Japan
PMID11473728 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • AM132
  • Antineoplastic Agents
  • Indoles
  • Interleukin-6
  • Propiophenones
  • TK5048
  • Tubulin
  • Tumor Necrosis Factor-alpha
  • Animals
  • Antineoplastic Agents (pharmacology)
  • Antineoplastic Combined Chemotherapy Protocols (pharmacology)
  • Carcinoma, Small Cell (drug therapy, metabolism, pathology)
  • Cell Division (drug effects)
  • Drug Screening Assays, Antitumor
  • Drug Synergism
  • Flow Cytometry
  • Humans
  • Indoles (administration & dosage, pharmacology)
  • Interleukin-6 (administration & dosage, pharmacology)
  • Lung Neoplasms (drug therapy, metabolism, pathology)
  • Melanoma, Experimental (drug therapy, metabolism, pathology)
  • Mice
  • Propiophenones (administration & dosage, pharmacology)
  • Tubulin (metabolism)
  • Tumor Cells, Cultured
  • Tumor Necrosis Factor-alpha (administration & dosage, pharmacology)
  • Xenograft Model Antitumor Assays

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