Carcinogenesis Advance Access published online on October 27, 2006
Carcinogenesis, doi:10.1093/carcin/bgl205
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1 The Institute for Nutritional Sciences, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
* To whom correspondence should be addressed. Apigenin is a nontoxic dietary flavonoid with anti-tumor properties. We recently showed that apigenin inhibited hypoxia-inducible factor 1 (HIF-1) and VEGF expression in human ovarian cancer cells under normoxic condition. However, the effect of apigenin in angiogenesis remains to be elucidated. Angiogenesis is the formation of new blood vessels and is required for tumor growth and metastasis. In this study, we showed that apigenin inhibited expression of HIF-1 and VEGF in different cancer cells under both normoxic and hypoxic conditions. We demonstrated that apigenin significantly inhibited tumor angiogenesis in vivo, by using both the chicken chorioallantoic membrane and Matrigel plug assays. The inhibition of tumor angiogenesis was associated with the decrease of HIF-1 and VEGF in tumor tissues. Taken together, our results show that apigenin suppresses tumor angiogenesis through HIF-1 and VEGF expression.
Received June 12, 2006
Revised October 13, 2006
Accepted October 16, 2006
MOLECULAR EPIDEMIOLOGY AND CANCER PREVENTION
Apigenin inhibits tumor angiogenesis through decreasing HIF-1
Jing Fang 1 *, Qiong Zhou 1, Ling-Zhi Liu 1, Chang Xia 2, Xiaowen Hu 1, Xianglin Shi 1, and Bing-Hua Jiang 3
and VEGF expression
2 Mary Babb Randolph Cancer Center, Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA
3 The Institute for Nutritional Sciences, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China; Mary Babb Randolph Cancer Center, Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA
Jing Fang, E-mail: jfang{at}sibs.ac.cn
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