Targeting Interleukin-4 Receptor α with Hybrid Peptide for Effective Cancer Therapy

Molecular Cancer Therapeutics - Tập 11 Số 1 - Trang 235-243 - 2012
Liying Yang1,2, Tomohisa Horibe1,2, Masayuki Kohno1, Mari Haramoto1,2, Koji Ohara1,2, Raj K. Puri1,2, Koji Kawakami1,2
1Authors' Affiliations: 1Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto; 2Upstream Infinity, Inc., 1-7-8 Kaigan, Minato-ku, Tokyo, Japan; and 3Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, US food and Drug Administration, Bethesda, Maryland
2Upstream Infinity, Inc., 1-7-8 Kaigan, Minato-ku, Tokyo, Japan

Tóm tắt

Abstract Interleukin-4 receptor α (IL-4Rα) chain is highly expressed on the surface of various human solid tumors. We designed a novel hybrid peptide termed IL-4Rα–lytic peptide that targets the IL-4Rα chain. The IL-4Rα–lytic peptide contains a target moiety to bind to IL-4Rα and a cellular toxic lytic peptide that selectively kills cancer cells. The anticancer activity of the IL-4Rα–lytic peptide was evaluated in vitro and in vivo. It was found that the IL-4Rα–lytic peptide has cytotoxic activity in cancer cell lines expressing IL-4Rα, determined by quantitative real-time PCR. The IC50 ratios of the lytic peptide to the IL-4Rα–lytic peptide correlated well with the expression levels of IL-4Rα on cancer cells (r = 0.80). In addition, IL-4Rα–lytic peptide administered either intratumoraly or intravenously significantly inhibited tumor growth in xenograft model of human pancreatic cancer (BXPC-3) in mice. These results indicate that the IL-4Rα–lytic peptide generated in this study has a potent and selective anticancer potential against IL-4Rα–positive solid cancers. Mol Cancer Ther; 11(1); 235–43. ©2011 AACR.

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