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Green tea compound in chemoprevention of cervical cancer

Changping Zou1, Huaguang Liu, Jean M Feugang

  • 1Guangxi Medical University, Nanning City, China.

International Journal of Gynecological Cancer : Official Journal of the International Gynecological Cancer Society
|August 6, 2010
PubMed
Abstract

Insights

Green tea compounds like EGCG and polyphenols E inhibit human papillomavirus (HPV)-related cervical cell growth by inducing apoptosis and decreasing HPV-E7 expression. These natural products show potential for cervical cancer prevention.

Area of Science:

  • Oncology
  • Natural Products Chemistry
  • Molecular Biology

Background:

  • Human papillomavirus (HPV) infection is a primary cause of cervical cancer, with current chemopreventive agents showing inconclusive results.
  • Nontoxic, natural products that suppress HPV and inhibit malignant transformation are crucial for effective cervical cancer prevention.
  • Previous studies on chemopreventive agents for cervical cancer have been limited by spontaneous regression and relapse.

Purpose of the Study:

  • To evaluate the effects of green tea compounds, specifically epigallocatechin gallate (EGCG) and polyphenols E, on cervical cells.
  • To investigate the potential of these natural compounds in suppressing oncogenic HPV and preventing cervical cancer.
  • To understand the mechanisms by which green tea compounds affect cervical cell growth, apoptosis, cell cycle, and gene expression.

Main Methods:

  • Utilized HPV-immortalized cervical epithelial cells (TCL1) and HPV-positive cervical cancer cells (Me180, HeLa).
  • Assessed the impact of EGCG and polyphenols E on cell proliferation, apoptosis, and cell cycle progression.
  • Examined changes in gene expression, including apoptosis-related proteins (p53, p21, p27) and HPV-E7 protein levels, using Western blot analysis.

Main Results:

  • Both EGCG and polyphenols E demonstrated significant inhibition of cervical epithelial and cancer cell growth.
  • Green tea compounds induced apoptosis and altered cell cycle progression in a dose-dependent manner.
  • Western blot analysis revealed a dose-dependent increase in p53 and p21, a decrease in HPV-E7 protein expression, and no significant change in p27.

Conclusions:

  • Green tea compounds exhibit anticancer properties against HPV-related cervical cells.
  • EGCG and polyphenols E may suppress HPV by downregulating HPV-E7 oncoprotein expression.
  • These findings support the potential use of green tea compounds as a safe and effective strategy for cervical cancer prevention.

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