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Effect of Quercetin on Green Tea Polyphenol Uptake in Prostate Tissue From Patients With Prostate Cancer Undergoing Surgery

Adenocarcinoma of the Prostate Clinical Trial

Official title:
A Phase I Randomized, Double-Blind, Placebo-Controlled Two-Arm Study of Quercetin and Green Tea to Enhance the Bioavailability of Green Tea Polyphenols in Men Scheduled for Prostatectomy

Clinical Trial Summary

This randomized pilot phase I trial will evaluate if quercetin enhances the uptake of green tea polyphenols in the prostate tissue of men taking green tea extract and undergoing radical prostatectomy. Side effects of green tea extract and quercetin in combination with green tea extract will also be evaluated. In preclinical studies, green tea polyphenols have anticancer and cancer preventative effects in a number of malignancies. Likewise, in preclinical studies quercetin was found to enhance the anticancer effects of green tea. This trial is designed to translate these findings forward in a short-term human intervention trial.

Clinical Trial Description

PRIMARY OBJECTIVES: I. To investigate the prostate tissue concentration of epigallocatechin gallate (EGCG), epicatechin gallate (ECG) and quercetin and their methylated metabolites in men scheduled for prostatectomy and consuming green tea (GT)extract (N=15) or GTextract with quercetin (N=15) for 3 weeks prior to prostatectomy. II. To determine the concentration of EGCG, ECG, epigallocatechin (EGC), epicatechin (EC) and quercetin and the methylated metabolites in plasma collected before (T=0) and two hours (T=2) after the intake of the morning dose of GTextract and placebo or GTextract with quercetin during the third week of intervention. III. To determine the effect of GTextract/quercetin intervention on reducing the enzyme activity and protein and gene expression of catechol-O-methyltransferase (COMT) and deoxyribonucleic (DNA) (cytosine-5) methyltransferase 1 (DNMT1) as well as protein and gene expression of multidrug resistance transport protein 1 (MRP1) in prostate tissue collected in specific aim 1 and COMT activity in erythrocytes from blood collected at baseline and week 3. IV. To determine the inter-individual variation in genotype of COMT in buffy coat DNA. OUTLINE: Patients are randomized to 1 of 2 treatment arms. ARM I: Patients receive GT extract orally (PO) twice daily (BID) and quercetin PO BID for 3-6 weeks before undergoing prostatectomy. ARM II: Patients receive GT extract PO BID and placebo PO BID for 3-6 weeks before undergoing prostatectomy. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01912820
Study type Interventional
Source Jonsson Comprehensive Cancer Center
Contact
Status Completed
Phase Phase 1
Start date January 1, 2014
Completion date June 10, 2021
View Details
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