Volume 116, Issue 1 pp. 1-8
Fast Track

Adenoviral vector–mediated gene transfer of IL-13Rα2 chain followed by IL-13 cytotoxin treatment offers potent targeted therapy for cytotoxin-resistant cancers

Makoto Saito

Makoto Saito

Laboratory of Molecular Biology of Infectious Agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

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Takashi Murata

Takashi Murata

Laboratory of Molecular Biology of Infectious Agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

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Ken Watanabe

Ken Watanabe

Laboratory of Molecular Biology of Infectious Agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

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Koji Kawakami

Koji Kawakami

Laboratory of Molecular Tumor Biology, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD, USA

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Motoyoshi Suzuki

Motoyoshi Suzuki

First Department of Internal Medicine, School of Medicine, Yokohama City University, Yokohama, Japan

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Takehiko Koji

Takehiko Koji

Laboratory of Histology and Cell Biology, Department of Developmental and Reconstructive Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

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Raj K. Puri

Raj K. Puri

Laboratory of Molecular Tumor Biology, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD, USA

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Kaio Kitazato

Kaio Kitazato

Laboratory of Molecular Biology of Infectious Agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

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Nobuyuki Kobayashi

Corresponding Author

Nobuyuki Kobayashi

Laboratory of Molecular Biology of Infectious Agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan

Fax: +81-95-819-2898.

Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, JapanSearch for more papers by this author
First published: 08 March 2005
Citations: 9

Abstract

Previous studies demonstrated that IL-13Rα2 chain–overexpressing cancer cells were highly sensitive to IL-13 cytotoxin (IL13-PE38QQR) and could be targeted by cytotoxin treatment. However, the majority of human tumors do not express high levels of IL-13Rα2 chain. To expand the IL-13 cytotoxin–mediated cancer targeting therapy, we combined cytotoxin treatment with gene transfer of IL-13Rα2 chain. We constructed a recombinant adenoviral vector carrying the human IL-13Rα2 gene (Ad-IL-13Rα2), which expresses high levels of IL-13Rα2 chain on infected cells. Human cancer cell lines A549 and HOS, which originally show no IL-13Rα2 expression and little sensitivity to IL-13 cytotoxin, were effectively converted to become sensitive to this cytotoxin after Ad-IL-13Rα2 infection. The CC50 of IL-13 cytotoxin for Ad-IL-13Rα2-infected A549 cells was <10 ng/ml, whereas the CC50 for uninfected or control vector-infected cells was >500 ng/ml. We also examined the antitumor activity of IL-13 cytotoxin in an established xenograft model of cytotoxin-resistant human lung tumor. Only a single i.t. injection of Ad-IL-13Rα2 markedly enhanced the sensitivity of established tumors to IL-13 cytotoxin treatment; furthermore, this antitumor effect was significantly sustained for more than 1 month after the last treatment with IL-13 cytotoxin. Taken together, these results suggest the combination of adenoviral vector–mediated IL-13Rα2 gene transfer and IL-13 cytotoxin administration can be an effective targeting approach for several types of IL-13 cytotoxin–resistant cancers which show no or little expression of IL-13Rα2 chain. © 2005 Wiley-Liss, Inc.

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