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The Scientific World Journal
Volume 2013 (2013), Article ID 230176, 7 pages
http://dx.doi.org/10.1155/2013/230176
Research Article

Antitumor Activity of Human Hydatid Cyst Fluid in a Murine Model of Colon Cancer

1Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, 11400 Montevideo, Uruguay
2Clínica Quirúrgica 1, Hospital Pasteur, Facultad de Medicina, Universidad de la República, 11400 Montevideo, Uruguay
3Departamento de Inmunobiología, Facultad de Medicina, Universidad de la República, 11400 Montevideo, Uruguay
4Unidad de Animales Transgénicos y Experimentación (UATE), Institut Pasteur de Montevideo, 11400 Montevideo, Uruguay

Received 5 June 2013; Accepted 14 July 2013

Academic Editors: T. T. Chye, M. C. Botelho, M. Gnanasekar, and N. Rout

Copyright © 2013 Edgardo Berriel et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study evaluates the antitumor immune response induced by human hydatic cyst fluid (HCF) in an animal model of colon carcinoma. We found that anti-HCF antibodies were able to identify cell surface and intracellular antigens in CT26 colon cancer cells. In prophylactic tumor challenge experiments, HCF vaccination was found to be protective against tumor formation for 40% of the mice ( ). In the therapeutic setting, HCF vaccination induced tumor regression in 40% of vaccinated mice ( ). This vaccination generated memory immune responses that protected surviving mice from tumor rechallenge, implicating the development of an adaptive immune response in this process. We performed a proteomic analysis of CT26 antigens recognized by anti-HCF antibodies to analyze the immune cross-reactivity between E. granulosus (HCF) and CT26 colon cancer cells. We identified two proteins: mortalin and creatine kinase M-type. Interestingly, CT26 mortalin displays 60% homology with E. granulosus hsp70. In conclusion, our data demonstrate the capacity of HCF vaccination to induce antitumor immunity which protects from tumor growth in an animal model. This new antitumor strategy could open new horizons in the development of highly immunogenic anticancer vaccines.