Volume 129, Issue 5 pp. 1244-1253
Cancer Therapy

EpCAM- and EGFR-targeted selective gene therapy for biliary cancers using Z33-fiber-modified adenovirus

Rei Kawashima

Rei Kawashima

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

Division of Gene Engineering, BioResource Center, RIKEN (Institute of Physical and Chemical Research), Tsukuba, Ibaraki 305-0074, Japan

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Masato Abei

Corresponding Author

Masato Abei

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

Tel.: 81-298-53-3125, Fax: +81-298-53-3218

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, JapanSearch for more papers by this author
Kuniaki Fukuda

Kuniaki Fukuda

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

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Kiminori Nakamura

Kiminori Nakamura

Department of Molecular Medicine, Sapporo Medical University, Sapporo, Hokkaido 060-8556, Japan

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Takehide Murata

Takehide Murata

Division of Gene Engineering, BioResource Center, RIKEN (Institute of Physical and Chemical Research), Tsukuba, Ibaraki 305-0074, Japan

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Mariko Wakayama

Mariko Wakayama

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

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Emiko Seo

Emiko Seo

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

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Naoyuki Hasegawa

Naoyuki Hasegawa

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

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Hiroyuki Mizuguchi

Hiroyuki Mizuguchi

Department of Biotechnology and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan

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Yuichi Obata

Yuichi Obata

Division of Gene Engineering, BioResource Center, RIKEN (Institute of Physical and Chemical Research), Tsukuba, Ibaraki 305-0074, Japan

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Ichinosuke Hyodo

Ichinosuke Hyodo

Division of Gastroenterology, University of Tsukuba Graduate School of Comprehensive Human Sciences, Tsukuba, Ibaraki 305-8575, Japan

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Hirofumi Hamada

Hirofumi Hamada

Department of Molecular Medicine, Sapporo Medical University, Sapporo, Hokkaido 060-8556, Japan

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Kazunari K. Yokoyama

Kazunari K. Yokoyama

Division of Gene Engineering, BioResource Center, RIKEN (Institute of Physical and Chemical Research), Tsukuba, Ibaraki 305-0074, Japan

Center of Excellence for Environmental Medicine, Cancer Center, Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan

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First published: 08 November 2010
Citations: 20

Abstract

A critical issue in adenovirus (Ad)-based cancer gene therapy is to improve the specificity of gene delivery to cancer cells for better efficacy and safety. We explored methods of retargeting Ad vectors for selective gene therapy of human biliary cancers using the Ad incorporating an IgG Fc-binding motif (Z33) from the Staphylococcus protein A (Ad-FZ33) combined with tumor-specific antibodies. Flow cytometry analysis revealed high-expression levels of epithelial cell adhesion molecule (EpCAM) and epidermal growth factor receptor (EGFR) on human biliary cancer cells. Ad-FZ33 expressing LacZ combined with antibodies against EpCAM or EGFR, followed by β-gal assay, demonstrated highly efficient gene transduction in these biliary cancer cells, compared to the treatment with control antibody or without antibody. Ad-FZ33 expressing uracil phosphoribosyl transferase (UPRT), an enzyme which greatly enhances the toxicity of 5-fluorouracil (FU), combined with antibodies against EpCAM or EGFR, remarkably enhanced the sensitivity of biliary cancer cells to 5-FU. By contrast, the treatment did not affect the 5-FU sensitivity of the cells not expressing EpCAM or EGFR including normal hepatocytes. Finally, treatments with the UPRT-expressing Ad-FZ33 with antibodies against EpCAM or EGFR, followed by 5-FU administration, significantly suppressed the growth of biliary cancer xenografts in nude mice. These results indicate that the gene therapy mediated by the Z33 fiber modified Ad with anti-EpCAM or anti-EGFR antibodies offers a potentially effective therapeutic modality against biliary cancers.

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