Treatment of nude mice with 4 amidinoindan 1-one2’ amidinohydrazone a new sadenosylmethionine decarboxylase inhibitor delays growth and inhibits metastasis of human melanoma cells

M. Gutman, P. J. Beltran, D. Fan, M. G. Delworth, R. K. Singh, M. R. Wilson, I. J. Fidler

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

CGP 48664A (4-amidinoindan-1-one2’-amidinohydrazone) is a novel inhibitor of S-adenosyl-methionine decarboxylase (SAMDC), a key enzyme in the biosynthesis of polyamines, which are themselves essential for proliferation of mammalian cells. Seven different human melanoma cell lines were treated in vitro with CGP 48664A. High, intermediate and low levels of cytostasis were induced in four, one and two melanoma lines, respectively. This cytostasis was reversed by the addition of exogenous spermidine or spermine to the culture medium. The heterogeneous low metastatic (CGP 48664A-resistant) A375P cells and highly metastatic (CGP 48664A-sensitive) A375SM cells were implanted into the subcutis or injected intravenously into nude mice. Systemic daily administration of CGP 48664A significantly reduced the size of cutaneous lesions and the number of lung metastases in mice implanted with A375SM cells. No beneficial effects were found in mice injected with A375P cells. Drug activity was dose dependent, and maximal effects were observed when treatment began in mice with small tumour burdens. The data suggest that CGP 48664A is effective against melanoma metastasis in nude mice and that its activity should be tested in combination with other cytoreductive agents.

Original languageEnglish (US)
Pages (from-to)147-154
Number of pages8
JournalMelanoma Research
Volume5
Issue number3
DOIs
StatePublished - Jun 1995
Externally publishedYes

Keywords

  • CGP 48664A
  • Melanoma
  • Metastases
  • Polyamine biosynthesis

ASJC Scopus subject areas

  • Oncology
  • Dermatology
  • Cancer Research

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