Nucleolin on the Cell Surface as a New Molecular Target for Gastric Cancer Treatment
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概要
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Nucleolin is an abundant non-ribosomal protein found in nucleolus and a major component of silver-stained nucleolar organizer region (AgNOR), a histopathological marker of cancer which is highly elevated in cancer cells. We recently reported that nucleolin on the cell surface of mouse gastric cancer cells acts as a receptor for tumor necrosis factor-α-inducing protein (Tipα), a new carcinogenic factor of Helicobacter pylori. In this study, we first examined the localization of nucleolin on cell surface of five gastric cancer cell lines by cell fractionation and flow cytometry: We found that large amounts of nucleolin were present on surface of MKN-45, KATOIII, MKN-74, and AGS cells, with smaller amounts on surface of MKN-1 cells. The membrane fraction of normal epithelial cells of mouse glandular stomach did not contain much nucleolin, suggesting that translocation of nucleolin to the cell surface occurs during carcinogenesis, making for easier binding with Tipα. AS1411, a nucleolin targeted DNA aptamer, inhibited growth of gastric cancer cell lines in this order of potency: MKN-45>KATOIII>AGS>MKN-74=MKN-1, associated with induction of S-phase cell cycle arrest. Fluorescein isothiocyanate (FITC)-AS1411 was more rapidly incorporated into MKN-45 and AGS than into MKN-1 cells, based on varying amounts of cell surface nucleolin. We think that AS1411 first binds to nucleolin on the cell surface and that the binding complex is then incorporated into the cells. All results indicate that nucleolin on the cell surface is a new and promising therapeutic target for treatment of gastric cancer.
- 公益社団法人 日本薬学会の論文
著者
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SUGANUMA Masami
Research Institute for Clinical Oncology, Saitama Cancer Center
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Hirano Kazuya
School Of Pharmacy Tokyo University Of Pharmacy And Life Sciences
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Beppu Masatoshi
School Of Pharmacy Tokyo Univ. Of Pharmacy And Life Sciences
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TAKAHASHI Atsushi
Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industria
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Watanabe Tatsuro
Research Institute for Clinical Oncology, Saitama Cancer Center
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Yamaguchi Kensei
Hospital, Saitama Cancer Center
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Fujiki Hirota
Faculty of Pharmaceutical Sciences, Tokushima Bunri University
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Suganuma Masami
Research Institute For Clinical Oncology Saitama Cancer Center
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Fujiki Hirota
Faculty Of Pharmaceutical Sciences Tokushima Bunri University
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Takahashi Atsushi
Research Institute For Innovation In Sustainable Chemistry National Institute Of Advanced Industrial
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Hirano Kazuya
School of Pharmacy, Tokyo University of Pharmacy and Life Science
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