title: Inhibition of tumour metastasis by targeted delivery of antioxidant enzymes.
abstract: Metastasis is one of the most harmful aspects of malignant neoplasm. Interaction of tumour cells with normal cells such as tissue macrophages may generate reactive oxygen species, which would affect various aspects of tumour metastasis. Reactive oxygen species cause damage to both tumour and normal cells and some of them, especially hydrogen peroxide, can also act as intracellular second messengers at sublethal concentrations to increase the transcription of various genes, which can then accelerate the proliferation of tumour cells in metastatic colonies. Therefore, eliminating hydrogen peroxide is one approach to inhibiting tumour metastasis. In this article, the roles of reactive oxygen species in tumour metastasis are reviewed, and the strategies to inhibit tumour metastasis by the targeted delivery of catalase, an enzyme that detoxifies hydrogen peroxide, are discussed.
authors.affiliation: Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan. makiya@pharm.kyoto-u.ac.jp
authors.forename: Makiya
authors.initials: M
authors.lastname: Nishikawa
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Hashida
mesh_terms: D000818:Animals; D002374:Catalase / Q000737:chemistry / Q000627:therapeutic use; D016503:Drug Delivery Systems / Q000379:methods*; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism; D009362:Neoplasm Metastasis / Q000188:drug therapy*; D009369:Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D010088:Oxidoreductases / Q000737:chemistry / Q000627:therapeutic use*; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide; D010088:Oxidoreductases; D002374:Catalase