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Synergistic Role of Arabinoxylan Rice Bran (MGN-3/Biobran) in S. cerevisiae-induced Apoptosis of Monolayer Breast Cancer MCF-7 Cells

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We have recently demonstrated that breast cancer cell (BCC) lines undergo apoptosis following phagocytosis of S. cerevisiae. Arabinoxylan rice bran extract (MGN-3/Biobran) has been shown to enhance this effect. Since previous data were obtained using cells in suspension, the present study was undertaken to examine monolayer BCC that more closely model cancer cell growth. Monolayers of both breast cancer (MCF-7) and non-tumorgenic breast epithelial (MCF-10A) cells grown on glass coverslips were cultured with heat-killed S. cerevisiae at a ratio of 1:10, respectively. MCF-7 cells phagocytized yeast in a time-dependent manner, 6.9% to 14.3% from 1 h to 4 h, respectively, with a 2-fold increase in the presence of MGN-3. On the other hand, there was virtually no phagocytosis of yeast by MCF-10A cells. Similarly, yeastinduced apoptosis of MCF-7 cells occurred in a timedependent manner, from 11.5% after 1 h to 21.7% after 4 h, and was enhanced in the presence of MGN-3. These data may have implications in the treatment of breast cancer

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: .,

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Language

English

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Classification

NONE

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Subject(s)

Biobran

Specific Detail Info

ANTICANCER RESEARCH 25: 4187-4196 (2005)

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