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Experimental Therapeutics, Preclinical Pharmacology |
Departments of Experimental Radiation Oncology [L. M., K. M., N. H., S. P., M. Y.], Radiation Oncology [K. A.], and Clinical Investigation [J. M., Z. F.], The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
Overexpression of epidermal growth factor receptor (EGFR) has been correlated with tumor resistance to cytotoxic agents, including radiation (T. Akimoto et al., Clin. Cancer Res., 5: 28842890, 1999), and thus is a candidate target for anticancer treatment. This study investigated whether treatment with C225 anti-EGFR antibody would improve tumor response to radiotherapy. Nude mice bearing 8-mm-diameter A431 tumor xenografts in the hind leg were treated with C225 antibody, 18 Gy of single-dose local tumor irradiation, or both. C225 was given i.p. at a dose of 1 mg/mouse 6 h before irradiation or 6 h before and 3 and 6 days after irradiation. Delay in tumor growth was the treatment end point. C225 dramatically improved the efficacy of local tumor irradiation, particularly when multiple injections of C225 were administered. Tumor radioresponse was enhanced by a factor of 1.59 by a single dose and by a factor of 3.62 by 3 doses of C225. Histological analyses of tumors revealed that C225 caused a striking increase in central tumor necrosis associated with hemorrhage and vascular thrombosis when combined with radiotherapy. In addition, C225 induced heavy tumor infiltration with granulocytes, increased tumor cell terminal differentiation, and inhibited tumor angiogenesis. We conclude that C225 anti-EGFR antibody enhances tumor radioresponse by multiple mechanisms that may involve direct and indirect actions on tumor cell survival.
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A. K. Gupta, W. G. McKenna, C. N. Weber, M. D. Feldman, J. D. Goldsmith, R. Mick, M. Machtay, D. I. Rosenthal, V. J. Bakanauskas, G. J. Cerniglia, et al. Local Recurrence in Head and Neck Cancer: Relationship to Radiation Resistance and Signal Transduction Clin. Cancer Res., March 1, 2002; 8(3): 885 - 892. [Abstract] [Full Text] [PDF] |
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A. Chakravarti, J. S. Loeffler, and N. J. Dyson Insulin-like Growth Factor Receptor I Mediates Resistance to Anti-Epidermal Growth Factor Receptor Therapy in Primary Human Glioblastoma Cells through Continued Activation of Phosphoinositide 3-Kinase Signaling Cancer Res., January 1, 2002; 62(1): 200 - 207. [Abstract] [Full Text] [PDF] |
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F. Ciardiello and G. Tortora A Novel Approach in the Treatment of Cancer: Targeting the Epidermal Growth Factor Receptor Clin. Cancer Res., October 1, 2001; 7(10): 2958 - 2970. [Abstract] [Full Text] [PDF] |
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C. L. Arteaga The Epidermal Growth Factor Receptor: From Mutant Oncogene in Nonhuman Cancers to Therapeutic Target in Human Neoplasia J. Clin. Oncol., September 15, 2001; 19(90001): 32s - 40. [Abstract] [Full Text] [PDF] |
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F. Robert, M. P. Ezekiel, S. A. Spencer, R. F. Meredith, J. A. Bonner, M. B. Khazaeli, M. N. Saleh, D. Carey, A. F. LoBuglio, R. H. Wheeler, et al. Phase I Study of Anti-Epidermal Growth Factor Receptor Antibody Cetuximab in Combination With Radiation Therapy in Patients With Advanced Head and Neck Cancer J. Clin. Oncol., July 1, 2001; 19(13): 3234 - 3243. [Abstract] [Full Text] [PDF] |
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A. Viloria-Petit, T. Crombet, S. Jothy, D. Hicklin, P. Bohlen, J. M. Schlaeppi, J. Rak, and R. S. Kerbel Acquired Resistance to the Antitumor Effect of Epidermal Growth Factor Receptor-blocking Antibodies in Vivo: A Role for Altered Tumor Angiogenesis Cancer Res., July 1, 2001; 61(13): 5090 - 5101. [Abstract] [Full Text] [PDF] |
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Y. Chen, T. DeWeese, J. Dilley, Y. Zhang, Y. Li, N. Ramesh, J. Lee, R. Pennathur-Das, J. Radzyminski, J. Wypych, et al. CV706, a Prostate Cancer-specific Adenovirus Variant, in Combination with Radiotherapy Produces Synergistic Antitumor Efficacy without Increasing Toxicity Cancer Res., July 1, 2001; 61(14): 5453 - 5460. [Abstract] [Full Text] [PDF] |
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G. Lammering, T. H. Hewit, W. T. Hawkins, J. N. Contessa, D. B. Reardon, P.-S. Lin, K. Valerie, P. Dent, R. B. Mikkelsen, and R. K. Schmidt-Ullrich Epidermal Growth Factor Receptor as a Genetic Therapy Target for Carcinoma Cell Radiosensitization J Natl Cancer Inst, June 20, 2001; 93(12): 921 - 929. [Abstract] [Full Text] [PDF] |
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G. Lammering, K. Valerie, P.-S. Lin, R. B. Mikkelsen, J. N. Contessa, J. P. Feden, J. Farnsworth, P. Dent, and R. K. Schmidt-Ullrich Radiosensitization of Malignant Glioma Cells through Overexpression of Dominant-Negative Epidermal Growth Factor Receptor Clin. Cancer Res., March 1, 2001; 7(3): 682 - 690. [Abstract] [Full Text] |
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J. A. Bonner, K. P. Raisch, H. Q. Trummell, F. Robert, R. F. Meredith, S. A. Spencer, D. J. Buchsbaum, M. N. Saleh, M. A. Stackhouse, A. F. LoBuglio, et al. Enhanced Apoptosis With Combination C225/Radiation Treatment Serves as the Impetus for Clinical Investigation in Head and Neck Cancers J. Clin. Oncol., November 1, 2000; 18(90001): 47s - 53. [Abstract] [Full Text] [PDF] |
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C. Bianco, R. Bianco, G. Tortora, V. Damiano, P. Guerrieri, P. Montemaggi, J. Mendelsohn, S. De Placido, A. R. Bianco, and F. Ciardiello Antitumor Activity of Combined Treatment of Human Cancer Cells with Ionizing Radiation and Anti-Epidermal Growth Factor Receptor Monoclonal Antibody C225 plus Type I Protein Kinase A Antisense Oligonucleotide Clin. Cancer Res., November 1, 2000; 6(11): 4343 - 4350. [Abstract] [Full Text] [PDF] |
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P. M. Harari and S.-M. Huang Modulation of Molecular Targets to Enhance Radiation Clin. Cancer Res., February 1, 2000; 6(2): 323 - 325. [Full Text] |
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