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Ingredient found in green tea significantly inhibits breast cancer growth in female mice
Date:4/7/2008

50-100 mg/kg/day.) The control mice received regular drinking water. In the second week of the study mouse breast cancer cells were injected in the left fourth mammary glands of the mice. Tumor size was monitored by measuring the tumor cross section area (TCSA). Tumors were eventually isolated and measured for tumor weight, intratumoral microvessel (IM) density (using staining), and VEGF protein levels (using ELISA).

At the end of the five week period the researchers found that oral consumption of EGCG caused significant decreases in TCSA (66%), tumor weight (68%), IM density 1556 vs.11120 IM#mm^2) and VEGF protein levels (59.03.7 vs. 45.71.4 pg/mg) in the breast tumors vs. the control mice, respectively (N=8; P<0.01). Further, VEGF plasma levels were lower in EGCG mice than in control mice (40.83.5 vs. 26.53.8 pg/ml P< 0.01).

Dr. Gu, the senior researcher for the study, hypothesized that the reason for the link between EGCG and the reductions in the cancer data was because EGCG directly targets both tumor blood vessels and tumor cells of breast cancer for suppressing the new blood vessels formation in breast tumor, the proliferation and migration of breast cancer cells.

Gu concluded by saying, In this study we have demonstrated that the frequent ingestion of EGCG significantly inhibits breast tumor growth, VEGF expression and tumor angiogenesis in mice. We believe our findings will help lead to new therapies for the prevention and treatment of breast cancer in women.


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Contact: Donna Krupa
dkrupa@the-aps.org
703-967-2751
American Physiological Society
Source:Eurekalert

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