Ovarian Cancer and Green Tea

 Posted by Chantel Martiromo

Ovarian cancer is defined as a condition of  abnormal ovarian cells growth of ovaries.  It is one of most common cancer in US, according to the statistics adapted from the American Cancer Society's publication, Cancer Facts & Figures 2010, an estimated 21,880 women in the United States will be diagnosed with ovarian cancer, causing 3,850 deaths.
Green Tea 
Green tea contains more amount of antioxidants than any drinks or food with the same volume, and is the leaves of Camellia sinensis, undergone minimal oxidation during processing, originated from China. Green tea has been a precious drink in traditional Chinese culture and used exceptional in socialization for more than 4000 thousand years. Because of their health benefits, they have been cultivated for commercial purposes all over the world. Recent study conducted in China also reported that green tea consumption reduced risk of ovarian cancer and increased survival post diagnosis(26).
"Green tea consumption suggested to enhance the survival of epithelial ovarian cancer", the cohort comprised 254 patients recruited during 1999-2000 with histopathologically confirmed epithelial ovarian cancer and followed up for a minimum of 3 years said, out of 254, 81 (77.9%) of 104 tea-drinkers who survived to the time of interview, compared to only 67 women (47.9%) still alive among the 140 non-drinkers(27). Epigallocatechin‑3‑gallate, phytochemical found in green tea EGCG significantly inhibited the proliferation of OVCAR‑3 cells in a time‑ and concentration‑dependent manner, through increased expression of the activity of p38/MAPK( control of stemness of glioma-initiating cells) and downregulation of the protein expression of MMP2(usually seen in invasive and highly tumorigenic cancers)(28). The study of combination of Epigallocatechin gallate and sulforaphane against paclitaxel-resistant ovarian cancer cells, showed to induced apoptosis of paclitaxel-resistant ovarian cancer cell lines through down-regulating of hTERT(Telomerase reverse transcriptase allows senescent cells that would otherwise become postmitotic and undergo apoptosis) and Bcl-2 and promote DNA damage response(29).
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References 
(26) Possible role for green tea in ovarian cancer prevention by Lee AH¹, Fraser ML, Binns CW.(PubMed)
(27) Epigallocatechin‑3‑gallate inhibits the proliferation and migration of human ovarian carcinoma cells by modulating p38 kinase and matrix metalloproteinase‑2 by Wang F, Chang Z, Fan Q, Wang L.(PubMed)
(28) Epigallocatechin gallate and sulforaphane combination treatment induce apoptosis in paclitaxel-resistant ovarian cancer cells through hTERT and Bcl-2 down-regulation by Chen H¹, Landen CN, Li Y, Alvarez RD, Tollefsbol TO.(PubMed)
(29) Epigallocatechin gallate and sulforaphane combination treatment induce apoptosis in paclitaxel-resistant ovarian cancer cells through hTERT and Bcl-2 down-regulation by Chen H¹, Landen CN, Li Y, Alvarez RD, Tollefsbol TO.(PubMed)