Evidence map›Paper›PMID 24096034›Full record

ArticleToxicology and applied pharmacology2013

Green tea polyphenol, (-)-epigallocatechin-3-gallate, induces toxicity in human skin cancer cells by targeting β-catenin signaling.

Tripti Singh, Santosh K Katiyar

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Toxicology and applied pharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02029352 (Topical Sinecatechins Ointment in Treatment of Primary Superficial Basal Cell Carcinoma), which is not on this map. Cited by 33 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 2 pooled it
3.6field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT02029352 phase2 / phase3completednot on this mapstarted 2014, after this paper: background citation

Topical Sinecatechins Ointment in Treatment of Primary Superficial Basal Cell Carcinoma: a Double Blind, Randomized, Placebo-controlled Trial.

TypeinterventionalSponsorMaastricht University Medical CenterRan2014 to 2016Enrolled42ConditionsCarcinoma, Basal CellArmsSinecatechins 10%, Placebo
3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 2 syntheses or guidelines pooled it, 75 citations in OpenAlex.

  1. Pooled it
  2. Interventions for basal cell carcinoma of the skin.The Cochrane database of systematic reviews · 2020
    Pooled it
  3. Trial
  4. Review
  5. Review
  6. Green Tea Catechins and Skin Health.Antioxidants (Basel, Switzerland) · 2024
    Review
  7. Review
  8. Review
  9. Review
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 1 country.

Tripti SinghDepartment of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
Santosh K Katiyar
Birmingham VA Medical Center · USUniversity of Alabama at Birmingham · US

Funding

Prevention of UV-carcinogenesis through DNA repair-dependent immunomodulationR01CA140197 · NCI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI KATIYAR, SANTOSH KUMAR, XU, HUI · 2010 to 2014
$1.4M
Proanthocyanidins,Novel bioactive components for prevention of melanoma invasionR21CA166883 · NCI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI KATIYAR, SANTOSH KUMAR · 2013 to 2014
$346k
Epigenetic modulation by green tea in prevention of photocarcinogenesisR21CA140832 · NCI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI KATIYAR, SANTOSH KUMAR · 2010 to 2011
$346k
Prevention of photocarcinogenesis by dietary immunomodulationI01BX001410 · VA · BIRMINGHAM VA MEDICAL CENTER · PI KATIYAR, SANTOSH KUMAR · 2012 to 2015
–
BLRD VA I01 BX001410NCI NIH HHS CA140197NCI NIH HHS CA166883NCI NIH HHS R01 CA140197NCI NIH HHS R21 CA140832NCI NIH HHS R21 CA166883
6 · The paper itself

Abstract

The green tea polyphenol, (-)-epigallocatechin-3-gallate (EGCG), has been shown to have anti-carcinogenic effects in several skin tumor models, and efforts are continued to investigate the molecular targets responsible for its cytotoxic effects to cancer cells. Our recent observation that β-catenin is upregulated in skin tumors suggested the possibility that the anti-skin carcinogenic effects of EGCG are mediated, at least in part, through its effects on β-catenin signaling. We have found that treatment of the A431 and SCC13 human skin cancer cell lines with EGCG resulted in reduced cell viability and increased cell death and that these cytotoxic effects were associated with inactivation of β-catenin signaling. Evidence of EGCG-induced inactivation of β-catenin included: (i) reduced accumulation of nuclear β-catenin; (ii) enhanced levels of casein kinase1α, reduced phosphorylation of glycogen synthase kinase-3β, and increased phosphorylation of β-catenin on critical serine(45,33/37) residues; and (iii) reduced levels of matrix metalloproteinase (MMP)-2 and MMP-9, which are down-stream targets of β-catenin. Treatment of cells with prostaglandin E2 (PGE2) enhanced the accumulation of β-catenin and enhanced β-catenin signaling. Treatment with either EGCG or an EP2 antagonist (AH6809) reduced the PGE2-enhanced levels of cAMP, an upstream regulator of β-catenin. Inactivation of β-catenin by EGCG resulted in suppression of cell survival signaling proteins. siRNA knockdown of β-catenin in A431 and SCC13 cells reduced cell viability. Collectively, these data suggest that induction of cytotoxicity in skin cancer cells by EGCG is mediated by targeting of β-catenin signaling and that the β-catenin signaling is upregulated by inflammatory mediators.

Indexed as

Skin NeoplasmsTeaAnticarcinogenic Agentsbeta CateninCatechinCell Line, TumorCell ProliferationCell SurvivalDose-Response Relationship, DrugDrug Delivery SystemsHumansPolyphenolsSignal TransductionAnticarcinogenic Agentsbeta CateninCatechinCTNNB1 protein, humanepigallocatechin gallatePolyphenolsTea3′–5′-cyclic adenosine monophosphatecAMPCDKCOX-2cyclin-dependent kinasecyclooxygenase-2Cyclooxygenase-2EGCG(−)-epigallocatechin-3 gallate(−)-Epigallocatechin-3-gallateGreen tea polyphenolmatrix metalloproteinaseMMPPGsProstaglandinprostaglandinsSkin cancerβ-Catenin

Identifiers

PMID24096034
PMCPMC3884646
OpenAlexW2026238951

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.