Evidence map›Paper›PMID 22405694›Full record

ArticleThe Journal of nutritional biochemistry2012

Polyphenols in brewed green tea inhibit prostate tumor xenograft growth by localizing to the tumor and decreasing oxidative stress and angiogenesis.

Susanne M Henning, Piwen Wang, Jonathan Said, Clara Magyar, Brandon Castor, Ngan Doan, Carmen Tosity, Aune Moro, Kun Gao, Luyi Li and 1 more

Open access · greenAbstract read
In one paragraph

Article in The Journal of nutritional biochemistry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 6% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

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  16. Arctigenin inhibits prostate tumor cell growthClinical nutrition experimental · 2017
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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

11 authors at 1 institution in 1 country.

Susanne M HenningCenter for Human Nutrition, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA. shenning@mednet.ucla.edu
Piwen Wang
Jonathan Said
Clara Magyar
Brandon Castor
Ngan Doan
Carmen Tosity
Aune Moro
Kun Gao
Luyi Li
David Heber
University of California, Los Angeles · US

Funding

UCLA SPORE IN PROSTATE CANCERP50CA092131 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FREEMAN, MICHAEL R · 2002 to 2023
$42.6M
Tea Polyphenols in Chemoprevention of Prostate CancerR01CA116242 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HENNING, SUSANNE MARGARETE · 2007 to 2011
$1.3M
Combined use of green tea and quercetin in prostate cancerR03CA150047 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HENNING, SUSANNE MARGARETE · 2011 to 2012
$154k
NCI NIH HHS P50 CA092131NCI NIH HHS P50 CA92131NCI NIH HHS R01 CA116242NCI NIH HHS R03 CA150047
6 · The paper itself

Abstract

It has been demonstrated in various animal models that the oral administration of green tea (GT) extracts in drinking water can inhibit tumor growth, but the effects of brewed GT on factors promoting tumor growth, including oxidant damage of DNA and protein, angiogenesis and DNA methylation, have not been tested in an animal model. To explore these potential mechanisms, brewed GT was administered instead of drinking water to male severe combined immunodeficiency (SCID) mice with androgen-dependent human LAPC4 prostate cancer cell subcutaneous xenografts. Tumor volume was decreased significantly in mice consuming GT, and tumor size was significantly correlated with GT polyphenol (GTP) content in tumor tissue. There was a significant reduction in hypoxia-inducible factor 1-alpha and vascular endothelial growth factor protein expression. GT consumption significantly reduced oxidative DNA and protein damage in tumor tissue as determined by 8-hydroxydeoxyguanosine/deoxyguanosine ratio and protein carbonyl assay, respectively. Methylation is known to inhibit antioxidative enzymes such as glutathione S-transferase pi to permit reactive oxygen species promotion of tumor growth. GT inhibited tumor 5-cytosine DNA methyltransferase 1 mRNA and protein expression significantly, which may contribute to the inhibition of tumor growth by reactivation of antioxidative enzymes. This study advances our understanding of tumor growth inhibition by brewed GT in an animal model by demonstrating tissue localization of GTPs in correlation with inhibition of tumor growth. Our results suggest that the inhibition of tumor growth is due to GTP-mediated inhibition of oxidative stress and angiogenesis in the LAPC4 xenograft prostate tumor in SCID mice.

Indexed as

8-Hydroxy-2'-DeoxyguanosineAnimalsAntineoplastic Agents, PhytogenicCamellia sinensisDeoxyguanosineDNA (Cytosine-5-)-Methyltransferase 1DNA (Cytosine-5-)-MethyltransferasesHumansHypoxia-Inducible Factor 1MacrophagesMaleMiceMice, SCIDNeovascularization, PathologicOxidative StressPlant Extracts8-Hydroxy-2'-DeoxyguanosineAntineoplastic Agents, PhytogenicDeoxyguanosineDNA (Cytosine-5-)-Methyltransferase 1DNA (Cytosine-5-)-MethyltransferasesHypoxia-Inducible Factor 1Plant ExtractsPolyphenols

Identifiers

PMID22405694
PMCPMC3374889
OpenAlexW2023283464

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.