Journal
CANCER LETTERS
Volume 183, Issue 1, Pages 23-30Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/S0304-3835(02)00113-1
Keywords
prevention of metastasis; carcinogenesis; isoliquiritigenin; tumor therapy
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Isoliquirifigenin is a chalcone isolated from licorice and shallots. The ability of isoliquiritigenin to suppress metastasis was examined in a pulmonary metastasis model of mouse renal cell carcinoma. Isoliquiritigenin significantly reduced pulmonary metastasis, without any weight loss or leukocytopenia. Isoliquiritigenin suppressed in vitro proliferation of carcinoma cells, potentiated nitric oxide production by lipopolysaccharide-stimulated macrophages, and facilitated cytotoxicity of splenic lymphocytes in vitro. These findings suggest activation of macrophages, activation of cytotoxicity of lymphocytes, and direct cytotoxicity as possible mechanisms of metastasis suppression by isoliquiritigenin. In addition, isoliquiritigenin prevented severe leukocytopenia caused by administration of 5-fluorouracil. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
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