Volume 95, Issue 7 pp. 608-613
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Antitumor effect of MCC-465, pegylated liposomal doxorubicin tagged with newly developed monoclonal antibody GAH, in colorectal cancer xenografts

Tetsuya Hamaguchi

Tetsuya Hamaguchi

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Yasuhiro Matsumura

Corresponding Author

Yasuhiro Matsumura

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

Investigative Treatment Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, Kashiwa 277-8577

To whom correspondence should be addressed. E-mail: [email protected]Search for more papers by this author
Yukihiro Nakanishi

Yukihiro Nakanishi

Department of Pathology, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Kei Muro

Kei Muro

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Yasuhide Yamada

Yasuhide Yamada

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Yasuhiro Shimada

Yasuhiro Shimada

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Kuniaki Shirao

Kuniaki Shirao

Department of Medicine, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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Hisae Niki

Hisae Niki

Pharmaceutical Research Division, Mitsubishi Pharma Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-0033

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Saiko Hosokawa

Saiko Hosokawa

Pharmaceutical Research Division, Mitsubishi Pharma Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-0033

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Toshiaki Tagawa

Toshiaki Tagawa

Pharmaceutical Research Division, Mitsubishi Pharma Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama 227-0033

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Tadao Kakizoe

Tadao Kakizoe

President, National Cancer Center, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045

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First published: 19 August 2005
Citations: 64

Abstract

MCC-465 is an immunoliposome-encapsulated doxorubicin. The liposome is tagged with polyethylene glycol and the F(ab)2 of a monoclonal antibody named GAH, a human antibody obtained by the hybridoma technique. The epitope recognized by GAH is not well characterized, but human gastric, colorectal, and mammary cancer cells were GAH-positive, while the normal counterparts were GAH-negative. Pegylated liposome doxorubicin (PLD) and MCC-465 did not show significant antitumor activity against GAH-negative Caco-2 xenografts. On the other hand, MCC-465 exhibited significantly superior antitumor effects against GAH-positive WiDr-Tc and SW837 xenografts, compared with PLD. Immunohis-tochemistry with GAH revealed that 94% (100 of 106) of surgical specimens of colorectal cancer were GAH-positive. These results warrant a phase I clinical trial of MCC-465 for patients with metastatic colorectal cancer.

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