BACKGROUND: The molecular links between breast cancer and obesity have been studied for many years. Obesity significantly increases the incidence rate and chance of morbidity of breast cancer. Leptin, mainly secreted by adipocytes, plays an important role in breast cancer development. Leptin expression is up-regulated in obesity and it can promote breast cancer cell growth. Zeranol is used as an anabolic growth promoter to stimulate cattle growth in the U.S. beef industry. (-)-Gossypol, a natural polyphenolic compound extracted from cottonseed, is an anticancer chemopreventive agent. MATERIALS AND METHODS: Zeranol, leptin and (-)-gossypol were used to investigate MCF-7 Adr cell growth. RESULTS: Leptin enhanced the sensitivity of MCF-7 Adr cells to zeranol and increased cell growth. Exposure to zeranol may lead to initiation of transformation of normal breast cells to breast preneoplastic cells. CONCLUSION: It is suggested that obese individuals may be at greater risk of developing zeranol-induced breast cancer.
BACKGROUND: The molecular links between breast cancer and obesity have been studied for many years. Obesity significantly increases the incidence rate and chance of morbidity of breast cancer. Leptin, mainly secreted by adipocytes, plays an important role in breast cancer development. Leptin expression is up-regulated in obesity and it can promote breast cancer cell growth. Zeranol is used as an anabolic growth promoter to stimulate cattle growth in the U.S. beef industry. (-)-Gossypol, a natural polyphenolic compound extracted from cottonseed, is an anticancer chemopreventive agent. MATERIALS AND METHODS:Zeranol, leptin and (-)-gossypol were used to investigate MCF-7 Adr cell growth. RESULTS:Leptin enhanced the sensitivity of MCF-7 Adr cells to zeranol and increased cell growth. Exposure to zeranol may lead to initiation of transformation of normal breast cells to breast preneoplastic cells. CONCLUSION: It is suggested that obese individuals may be at greater risk of developing zeranol-induced breast cancer.
Authors: Weiping Ye; Pingping Xu; Saiyi Zhong; Walter R Threlfall; Christopher Frasure; Eric Feng; Hong Li; Shu-Hong Lin; Jie-Yu Liu; Young C Lin Journal: Exp Ther Med Date: 2010-09-29 Impact factor: 2.447
Authors: Pingping Xu; Weiping Ye; Saiyi Zhong; Robert Jen; Hong Li; Eric Feng; Shu-Hong Lin; Jie-Yu Liu; Young C Lin Journal: Oncol Lett Date: 2010-11-23 Impact factor: 2.967
Authors: Weiping Ye; Pingping Xu; Robert Jen; Eric Feng; Saiyi Zhong; Hong Li; Shu-Hong Lin; Jie-Yu Liu; Young C Lin Journal: Int J Mol Sci Date: 2011-02-25 Impact factor: 5.923