Reduction of liver metastasis of intraocular melanoma by interferon-β gene transfer

Hassan Alizadeh, Kevin Howard, Jessee Mellon, Elizabeth Mayhew, Dario Rusciano, Jerry Y. Niederkorn

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

PURPOSE. This study determined whether adenovirus-mediated transfer of the murine interferon-β (AdCMVIFN-β) gene protects against liver metastases arising from intraocular melanomas in mice. METHODS. A replication-deficient adenovirus vector (AdCMVIFN-β) was used for the in vivo transfer of the murine IFN-β gene into intraocular melanoma-bearing mice. AdCMVIFN-β was injected either intravenously or directly into the intraocular melanomas. The effect of gene transfer on liver metastases was ascertained by histopathologic analysis of the livers and by measuring serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT), which are two enzymes associated with liver metastases in patients with uveal melanoma. RESULTS. Mice treated with two intratumoral injections of AdCMVIFN-β had a 68% reduction in metastatic liver lesions (P = 0.016) and a 51% reduction in liver enzyme levels compared with control mice (P = 0.02). However, the antimetastatic effect of AdCMVIFN-β was not directly attributable to the adenovirus vector or virus-mediated cytolysis of tumor cells. Intravenous treatment with AdCMVIFN-β resulted in an 86% reduction in the number of metastatic loci in the liver (P = 0.014) and a 61% reduction of serum AST levels compared with mice treated with AdCMVLacZ (P = 0.015). AdCMVIFN-β treatment produced a sharp increase in the NK cell activity that was demonstrable in vivo and in vivo. In vivo depletion of NK cells by anti-asialo GM1 antibody abrogated the antimetastatic effects of AdCMVIFN-β. CONCLUSIONS. The results support the feasibility of activation of NK cell function through gene transfer as one possible therapeutic strategy for reducing hepatic metastases of uveal melanomas.

Original languageEnglish (US)
Pages (from-to)3042-3051
Number of pages10
JournalInvestigative Ophthalmology and Visual Science
Volume44
Issue number7
DOIs
StatePublished - Jul 1 2003

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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