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Cancer inhibition by green tea
H Fujiki1, M Suganuma, S Okabe
1Saitama Cancer Center Research Institute, Ina, Kitaadachi-gun, Saitama 362, Japan.
Mutation Research
|July 24, 1998
Summary
Green tea consumption, particularly its main polyphenol (-)-epigallocatechin gallate (EGCG), shows promise in cancer prevention. Studies indicate EGCG inhibits cancer cell growth and may delay cancer onset in humans.
Area of Science:
- Oncology
- Pharmacology
- Nutrition
Background:
- Green tea is recognized in Japan for its cancer-preventive properties.
- (-)-epigallocatechin gallate (EGCG) is the primary active compound in green tea polyphenols.
Purpose of the Study:
- To investigate the anti-cancer effects of EGCG.
- To examine the distribution of EGCG in organs.
- To correlate green tea consumption with cancer onset.
Main Methods:
- Inhibition of human lung cancer cell line (PC-9) growth by EGCG and tea polyphenols.
- Oral intubation of 3H-EGCG in mice to track its distribution.
- Analysis of cancer onset data based on daily green tea consumption.
Main Results:
- EGCG and tea polyphenols induced G2/M arrest in PC-9 cells.
- Traces of 3H-EGCG were detected in organs known for anti-carcinogenic effects.
- Higher green tea intake correlated with delayed cancer onset in both genders.
Conclusions:
- EGCG exhibits anti-cancer properties by inhibiting cell proliferation.
- EGCG distributes to relevant organs, supporting its systemic anti-cancer potential.
- Increased green tea consumption may contribute to cancer prevention.