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Green tea and tea polyphenols in cancer prevention

Di Chen1, Kenyon G Daniel, Deborah J Kuhn

  • 1The Prevention Program, Barbara Ann Karmanos Cancer Institute, and Department of Pathology, Wayne State University, School of Medicine, Detroit, Michigan 48201, USA.

Frontiers in Bioscience : a Journal and Virtual Library
|September 11, 2004
PubMed

Insights

Green tea and its compound (-)-epigallocatechin gallate [(-)-EGCG] show promising cancer-preventive effects. Research indicates they induce tumor cell death and inhibit cancer growth across various studies, warranting further clinical investigation.

Area of Science:

  • Oncology
  • Pharmacology
  • Nutritional Science

Background:

  • Green tea consumption is linked to reduced cancer risk in epidemiological studies.
  • (-)-Epigallocatechin gallate [(-)-EGCG], a major green tea polyphenol, exhibits potent anticancer properties.
  • Tea polyphenols selectively induce apoptosis and cell cycle arrest in tumor cells.

Purpose of the Study:

  • To review the evidence supporting the cancer-preventive effects of green tea and (-)-EGCG.
  • To explore the molecular mechanisms underlying the anticancer activity of green tea polyphenols.
  • To assess the current status of research, including animal and clinical studies, on green tea's role in cancer prevention.

Main Methods:

  • Analysis of epidemiological data on green tea consumption and cancer incidence.
  • Review of in vitro cell culture studies on tea polyphenols' effects on cancer cells.
  • Examination of in vivo animal studies investigating green tea's impact on tumor development.
  • Evaluation of findings from Phase I and II clinical trials on green tea in cancer patients.

Main Results:

  • Epidemiological studies suggest a correlation between green tea intake and lower cancer risk.
  • In vitro studies demonstrate that tea polyphenols induce apoptosis and cell cycle arrest in cancer cells.
  • Animal studies show green tea inhibits tumor incidence and multiplicity in various organs.
  • Clinical trials are exploring the anticancer potential of green tea in patients.

Conclusions:

  • Green tea and (-)-EGCG possess significant cancer-preventive potential supported by diverse research.
  • Mechanisms involve modulation of signal transduction pathways and induction of cancer cell death.
  • Further mechanistic research, animal studies, and clinical trials are essential to fully establish green tea's role in cancer prevention.

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