Combination of MIG (CXCL9) chemokine gene therapy with low-dose cisplatin improves therapeutic efficacy against murine carcinoma

Gene Ther. 2006 Sep;13(17):1263-71. doi: 10.1038/sj.gt.3302756. Epub 2006 May 4.

Abstract

MIG (monokine induced by interferon-gamma) is a CXC chemokine ligand (CXCL9) that can potently inhibit angiogenesis, and displays thymus-dependent antitumor effects. The effectiveness of a treatment combining gene therapy with plasmid-borne MIG (pORF-MIG) and low-dose cisplatin chemotherapy was determined using colon carcinoma (CT26) and Lewis lung carcinoma (LL/2c) murine models. The program was carried out via intramuscular delivery of pORF-MIG at 100 mug/mouse twice a week for 4 weeks, and/or intraperitoneal delivery of cisplatin at 0.6 mg/kg/mouse every 3 days for 48 days. Tumor volume and survival time were evaluated after treatment. CD31 immunohistochemical staining in tumor tissues and alginate capsule models in vivo was used to evaluate angiogenesis. Induction of apoptosis and cytotoxic T-lymphocyte (CTL) activity were also assessed. The combination of pORF-MIG and low-dose cisplatin produced significant antitumor activity, with complete tumor regression in 4/10 of CT26 colon carcinomas and 3/10 of LL/2c lung carcinomas, low vascularity, in alginate capsules, apparently degraded tumor microvessel density, and increased induction of apoptotic and CTL activities compared with either treatment alone. This study suggests that the combination of pORF-MIG plus cisplatin augments the inhibition of angiogenesis and the induction of apoptosis or CTL activity, all of which enhance antitumor activity. These findings may prove useful in further explorations of the application of combinatorial approaches to the treatment of solid tumors.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antineoplastic Agents / therapeutic use*
  • Apoptosis
  • Carcinoma / drug therapy
  • Carcinoma / therapy*
  • Carcinoma, Lewis Lung / blood supply
  • Carcinoma, Lewis Lung / drug therapy
  • Carcinoma, Lewis Lung / therapy
  • Chemokine CXCL9
  • Chemokines, CXC / genetics*
  • Cisplatin / therapeutic use*
  • Colonic Neoplasms / blood supply
  • Colonic Neoplasms / drug therapy
  • Colonic Neoplasms / therapy
  • Combined Modality Therapy
  • Genetic Engineering
  • Genetic Therapy / methods*
  • Injections, Intramuscular
  • Injections, Intraperitoneal
  • Lymphocyte Activation
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Neoplasms, Experimental / blood supply
  • Neoplasms, Experimental / drug therapy
  • Neoplasms, Experimental / therapy
  • Neovascularization, Pathologic
  • Oncolytic Virotherapy / methods*
  • Plasmids / administration & dosage
  • Random Allocation
  • T-Lymphocytes, Cytotoxic / immunology

Substances

  • Antineoplastic Agents
  • Chemokine CXCL9
  • Chemokines, CXC
  • Cxcl9 protein, mouse
  • Cisplatin