Evidence map›Paper›PMID 24314868›Full record

ArticleThe Journal of nutritional biochemistry2014

Enhanced inhibition of prostate cancer xenograft tumor growth by combining quercetin and green tea.

Piwen Wang, Jaydutt V Vadgama, Jonathan W Said, Clara E Magyar, Ngan Doan, David Heber, Susanne M Henning

Open access · greenAbstract read
In one paragraph

Article in The Journal of nutritional biochemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
6.2field-weighted citation impact, top 3% 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

35 citing papers in PubMed, 75 citations in OpenAlex.

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  15. Prostate cancer: Therapeutic prospect with herbal medicine.Current research in pharmacology and drug discovery · 2021
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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

7 authors at 2 institutions in 1 country.

Piwen WangDivision of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA, 90059, USA; Center for Human Nutrition, University of California, Los Angeles, CA, 90095, USA. Electronic address: piwenwang@cdrewu.edu.
Jaydutt V Vadgama
Jonathan W Said
Clara E Magyar
Ngan Doan
David Heber
Susanne M Henning
University of California, Los Angeles · USCharles R. Drew University of Medicine and Science · US

Funding

Women's CancersP30CA016042 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI Samuel Wheeler French · 1985 to 2026
$134.5M
UCLA SPORE IN PROSTATE CANCERP50CA092131 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FREEMAN, MICHAEL R · 2002 to 2023
$42.6M
Supporting African American Churches to Promote Cancer ScreeningU54CA143931 · NCI · CHARLES R. DREW UNIVERSITY OF MED & SCI · PI VADGAMA, JAYDUTT V. · 2009 to 2022
$19.7M
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 P30 CA016042NCI NIH HHS P50 CA092131NCI NIH HHS P50CA092131NCI NIH HHS R01 CA116242NCI NIH HHS R03 CA150047NCI NIH HHS R03 CA150047-01NCI NIH HHS U54 CA143931NCI NIH HHS U54 CA143931-01
6 · The paper itself

Abstract

The chemopreventive activity of green tea (GT) is limited by the low bioavailability and extensive methylation of GT polyphenols (GTPs) in vivo. We determined whether a methylation inhibitor quercetin (Q) will enhance the chemoprevention of prostate cancer in vivo. Androgen-sensitive LAPC-4 prostate cancer cells were injected subcutaneously into severe combined immunodeficiency (SCID) mice one week before the intervention. The concentration of GTPs in brewed tea administered as drinking water was 0.07% and Q was supplemented in diet at 0.2% or 0.4%. After 6-weeks of intervention tumor growth was inhibited by 3% (0.2% Q), 15% (0.4% Q), 21% (GT), 28% (GT+0.2% Q) and 45% (GT+0.4% Q) compared to control. The concentration of non-methylated GTPs was significantly increased in tumor tissue with GT+0.4% Q treatment compared to GT alone, and was associated with a decreased protein expression of catechol-O-methyltransferase and multidrug resistance-associated protein (MRP)-1. The combination treatment was also associated with a significant increase in the inhibition of proliferation, androgen receptor and phosphatidylinositol 3-kinase/Akt signaling, and stimulation of apoptosis. The combined effect of GT+0.4% Q on tumor inhibition was further confirmed in another experiment where the intervention started prior to tumor inoculation. These results provide a novel regimen by combining GT and Q to improve chemoprevention in a non-toxic manner and warrant future studies in humans.

Indexed as

AnimalsAntineoplastic AgentsApoptosisATP-Binding Cassette, Sub-Family C ProteinsCatechol O-MethyltransferaseCell Line, TumorCell ProliferationChemopreventionMaleMiceMice, SCIDPhosphatidylinositol 3-KinasesPolyphenolsProstatic NeoplasmsQuercetinReceptors, AndrogenAntineoplastic AgentsATP-Binding Cassette, Sub-Family C ProteinsCatechol O-Methyltransferasemultidrug resistance-associated protein 1Phosphatidylinositol 3-KinasesPolyphenolsQuercetinReceptors, AndrogenTea4″-MeEGCG4″-O-methyl EGCGandrogen receptorARcatechol-O-methyltransferaseCatechol-O-methyltransferaseCOMTEC, (−)-epicatechinECG, (−)-epicatechin-3-gallateEGCEGCG, (−)epigallocatechinepigallocatechin-3-gallategreen teaGreen teagreen tea polyphenolsGTGTPsHDhigh dosehigh-performance liquid chromatographyHPLCLDlow dosemammalian target of rapamycinMRPmTORmultidrug resistance-associated proteinphosphatidylinositol 3-kinasesPI3KProstate cancerprostate-specific antigenPSAQquercetinQuercetinSCIDSCID micesevere combined immunodeficiency

Identifiers

PMID24314868
PMCPMC3858726
OpenAlexW1996054484

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.