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Human monoclonal antibodies to the insulin-like growth factor 1 receptor inhibit receptor activation and tumor growth in preclinical studies

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Abstract

Introduction

The insulin-like growth factor type 1 (IGF-1) receptor contributes importantly to transformation and survival of tumor cells both in vitro and in vivo, and selective antagonists of the IGF-1 receptor (IGF-1R) activity represent an attractive experimental approach for human cancer therapy.

Methods

Using a phage display library, we identified several high-affinity fully human monoclonal antibodies with inhibitory activity against both human and rodent IGF.1Rs.

Results

These candidate therapeutic antibodies recognized several distinct epitopes and effectively blocked ligand-mediated receptor signal transduction and cellular proliferation in vitro. They also induced IGF-1R downregulation and catabolism following antibody-mediated endocytosis. These antibodies exhibited activity against human, primate, and rodent IGF-1Rs, and dose-dependently inhibited the growth of established human tumors in nude mice.

Conclusion

These fully human antibodies therefore have the potential to provide an effective anti-tumor biological therapy in the human clinical setting.

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Correspondence to Herbert A. Runnels.

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Runnels, H.A., Arbuckle, J.A., Bailey, K.S. et al. Human monoclonal antibodies to the insulin-like growth factor 1 receptor inhibit receptor activation and tumor growth in preclinical studies. Adv Therapy 27, 458–475 (2010). https://doi.org/10.1007/s12325-010-0026-5

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  • DOI: https://doi.org/10.1007/s12325-010-0026-5

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