This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Retter, M. W. Articles by Rock, K. L. Search for Related Content PubMed PubMed Citation Articles by Retter, M. W. Articles by Rock, K. L.

Characterization of a Proapoptotic Antiganglioside GM2 Monoclonal Antibody and Evaluation of Its Therapeutic Effect on Melanoma and Small Cell Lung Carcinoma Xenografts

¹ Antigen Discovery and Preclinical Biology, Corixa Corporation, Seattle, Washington and ² Department of Pathology, University of Massachusetts Medical School, Worcester, Massachusetts

Requests for reprints: Kenneth L. Rock, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655. Phone: 508-856-2521; Fax: 508-856-1094; E-mail: kenneth.rock{at}umassmed.edu.

Monoclonal antibodies have begun to show great clinical promise for the treatment of cancer. Antibodies that can directly affect a tumor cell's growth and/or survival are of particular interest for immunotherapy. Previously, we described monoclonal antibody DMF10.62.3 that had antiproliferative and proapoptotic effects when it bound an antigen of unknown identity on tumor cells in vitro. In this report, we determined that DMF10.62.3 and a clonally related antibody DMF10.167.4 recognize the ganglioside GM2. These antibodies react with a GM2 epitope that is expressed on a large number of tumor cell lines, including human melanoma and small cell lung carcinoma, but not on normal primary lines or most normal tissues. Interestingly, this pattern of cellular reactivity is distinct from that reported for other previously described GM2 antibodies, a difference that is presumably due to DMF10.167.4's binding to a unique GM2-associated epitope. Additional characterization of DMF10.167.4 revealed that this antibody was able to induce apoptosis and/or block cellular proliferation when cultured in vitro with the human Jurkat T lymphoma, CHL-1 melanoma, and SBC-3 small cell lung carcinoma lines. In vivo, DMF10.167.4 antibody was well tolerated in mice and did not detectably bind to or damage normal tissues. However, this antibody was able to prevent murine E710.2.3 lymphoma, human CHL-1 melanoma, and SBC-3 small cell lung carcinoma lines from establishing tumors in vivo and blocked progression of established CHL-1 and SBC-3 tumors in vivo. Therefore, monoclonal antibody DMF10.167.4 has immunotherapeutic potential.

This article has been cited by other articles:

				L. Roque-Navarro, K. Chakrabandhu, J. de Leon, S. Rodriguez, C. Toledo, A. Carr, C. M. de Acosta, A.-O. Hueber, and R. Perez Anti-ganglioside antibody-induced tumor cell death by loss of membrane integrity Mol. Cancer Ther., July 1, 2008; 7(7): 2033 - 2041. [Abstract] [Full Text] [PDF]

				G. Raval, S. Biswas, P. Rayman, K. Biswas, G. Sa, S. Ghosh, M. Thornton, C. Hilston, T. Das, R. Bukowski, et al. TNF-{alpha} Induction of GM2 Expression on Renal Cell Carcinomas Promotes T Cell Dysfunction J. Immunol., May 15, 2007; 178(10): 6642 - 6652. [Abstract] [Full Text] [PDF]

				K. Biswas, A. Richmond, P. Rayman, S. Biswas, M. Thornton, G. Sa, T. Das, R. Zhang, A. Chahlavi, C. S. Tannenbaum, et al. GM2 Expression in Renal Cell Carcinoma: Potential Role in Tumor-Induced T-Cell Dysfunction. Cancer Res., July 1, 2006; 66(13): 6816 - 6825. [Abstract] [Full Text] [PDF]