Green tea catechins for chemoprevention of prostate cancer in patients with histologically-proven HG-PIN or ASAP. Concise review and meta-analysis

source extracted confidence: high 2026-04-09
#catechin #chemoprevention #humans #male #neoplasm-grading

Green tea catechins for chemoprevention of prostate cancer in patients with histologically-proven HG-PIN or ASAP. Concise review and meta-analysis

Perletti et al., 2019 | Arch Ital Urol Androl | Meta Analysis

Citation

Perletti Gianpaolo, Magri Vittorio, ... Trinchieri Alberto. Green tea catechins for chemoprevention of prostate cancer in patients with histologically-proven HG-PIN or ASAP. Concise review and meta-analysis. Arch Ital Urol Androl. 2019-Oct-02;91(3). doi:10.4081/aiua.2019.3.153

Abstract

A focused, single outcome meta-analysis on the protective role of extracts of green tea catechins against prostate cancer. Randomized, placebo-controlled studies enrolling patients with a histologically confirmed diagnosis of high-grade Prostate Intraepithelial Neoplasia or Atypical Small Acinar proliferation but no prostate cancer were included. Meta-analysis for binary data was performed using Mantel-Haenszel statistics, using a random-effects model. Heterogeneity was investigated by calculating the I2. Four studies matched the inclusion criteria for the review. The pooled population was 223 patients; 114 and 109 patients were randomized to catechin and placebo groups, respectively. Nine cases of prstate cancer occurred in the catechin arm (7.9%), and 24 cases were reported in the placebo arm (22%). Pooled analysis resulted in a significant reduction of cancer risk in favor of the catechin arm (risk-ratio = 0.41; 95% CI: 0.19- 0.86; I2 = 0). In conclusion, our data suggest that the intake of concentrated green tea catechin preparations may confer a significant protective effect to carriers of early neoplastic lesions in the prostate. The quality of the evidence is moderate, and additional, largescale studies are warranted to substantiate these preliminary findings.

Key Findings

The quality of the evidence is moderate, and additional, largescale studies are warranted to substantiate these preliminary findings.

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population a histologically confirmed diagnosis
Sample Size 223
Age Range See abstract
Condition See abstract

MeSH Terms

  • Catechin
  • Chemoprevention
  • Humans
  • Male
  • Neoplasm Grading
  • Plant Extracts
  • Prostate
  • Prostatic Intraepithelial Neoplasia
  • Prostatic Neoplasms
  • Randomized Controlled Trials as Topic
  • Tea

Evidence Classification

  • Level: Meta Analysis
  • Publication Types: Journal Article, Meta-Analysis, Review
  • Vertical: green-tea

Provenance

Source extracted via PubMed E-utilities API on 2026-04-09