Immunomodulatory and therapeutic properties of FK-565 in mice

James E. Talmadge, Barbara Lenz, Mark Schneider, Hamblin Phillips, Cedric Long

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The heptanoyl tripeptide, FK-565 is a biological response modifier with potent therapeutic properties for the treatment of experimental and spontaneous metastases. Doses of FK-565 greater than 5 mg/kg are required for in vivo augmentation of natural killer cells, macrophages, and for therapeutic activity, presumably because FK-565 is a peptide small molecular mass which is rapidly degraded and excreted. Optimal therapeutic activity is observed at approximately 25-50 mg/kg FK-565, administered i.v. three times per week for 4 weeks. In addition to its therapeutic properties, which were consistently greater than the positive control at optimal doses, FK-565 had significant immunoaugmentary properties for natural killer cells, macrophages, and T cells both in vitro and in vivo, suggesting that its therapeutic activity is due to immune augmentation.

Original languageEnglish (US)
Pages (from-to)93-100
Number of pages8
JournalCancer Immunology Immunotherapy
Issue number2
StatePublished - Feb 1989
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Oncology
  • Cancer Research


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