Journal
JOURNAL OF IMMUNOTHERAPY
Volume 32, Issue 4, Pages 363-369Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/CJI.0b013e31819d29d8
Keywords
macrophage inflammation protein-3 alpha; dendritic cells; cancer vaccine
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Funding
- National Science Council, Taiwan [NSC96-2752-B-400-001-PAE, NSC95-2314-B-400-006-MY3]
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Macrophage inflammation protein-3 alpha (MIP-3 alpha) is a chemokine expressed in inflamed tissue and capable of inducing migration of immature dendritic cells (DCs) or Langerhans cells. We Postulated that conditioning vaccination sites with MIP-3 alpha might enhance the efficacy of subsequently administered DC-based cancer vaccines. Our results demonstrate that subcutaneously injection of irradiated tumor cells expressing MIP-3 alpha induces Substantial cell infiltration to the injection site. Vaccination of irradiated turner cells expressing MIP-3 alpha. followed by DCs pulsed with irradiated tumor cells can effectively suppress tumor growth in animals, which is significantly better than vaccination with irradiated MIP-3 alpha-producing tumor cells or DCs pulsed with tumor cells alone. The protective effect was most evident when the MIP-3 alpha-producing tumor cells and DC-based vaccines were injected at the same site. These results support the notion that this combination vaccination strategy might generate a more effective immune response to suppress the growth of tumor cells in animals.
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