Clinical Trial of Green Tea Catechins in Men on Active Surveillance

NCT ID: NCT04300855

Last Updated: 2025-10-03

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: PHASE2
• Total Enrollment: 115 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-08-21
• Study Completion Date: 2027-02-27

Brief Summary

This randomized double-blinded Phase II clinical trial will evaluate the bioavailability, safety, effectiveness and validate the mechanism by which a standardized formulation of whole Green Tea Catechin, (Sunphenon® 90D) containing 405 mgs vs. Placebo, administered for 24 months in a cohort of men with low to intermediate grade prostate managed on active surveillance

Conditions

Prostate Cancer; Prostate Adenocarcinoma

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: DOUBLE

Study Groups

Sunphenon® 90D

Participants will be administered a standardized formulation of whole Green Tea Catechin for 24 months. The daily dose of Green Tea Catechin will be taken in divided doses, three capsules in the morning and 3 capsules in the evening, with food (within one hour of eating a substantial meal). On the day of monthly follow-up visit, capsules should be taken within 4 hours of visit and blood draw for required lab work. If the participant is scheduled to come in the afternoon, dose should be taken with lunch that day instead of with dinner for that day.

Group Type: EXPERIMENTAL

Sunphenon

Intervention Type: DRUG

The study agent will be administered in divided doses with food, three capsules twice a day (405 mg) for 24 months

Placebo

Participants will be administered a placebo for 24 months. The daily dose of placebo will be taken in divided doses, three capsules in the morning and 3 capsules in the evening, with food (within one hour of eating a substantial meal). On the day of monthly follow-up visit, capsules should be taken within 4 hours of visit and blood draw for required lab work. If the participant is scheduled to come in the afternoon, dose should be taken with lunch that day instead of with dinner for that day.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

Matching placebo

Interventions

Sunphenon

The study agent will be administered in divided doses with food, three capsules twice a day (405 mg) for 24 months

Intervention Type: DRUG

Placebo

Matching placebo

Intervention Type: DRUG

Other Intervention Names

Green Tea Catechin

Eligibility Criteria

Inclusion Criteria

• 18 years of age or older
• Biopsy-proven (consisting of ≥ 12 tissue cores) adenocarcinoma of the prostate with cancer present in at least one biopsy core (TRUS or/and mpMRI/TRUS fusion), Gleason score (3+3) or predominant Gleason pattern 3 (3+4), ≤ 33% of biopsy cores, and ≤50% involvement of any biopsy core (Participant meets all criteria for Active Surveillance as determined by MD)
• Willing to start or continue on active surveillance
• Baseline/screening serum PSA <10 ng/mL
• No other prior treatment for PCa, including focal therapy
• ECOG performance status 0-1
• No history of renal or hepatic disease, including history of hepatitis B and C
• Meet hematological eligibility parameters (Neutrophil count ≥ 1,200/mm3 (≥1.2 k/μL), Stable platelet count ≥ 75,000/mm3 (≥ 75k/μL) Hepatic and renal function eligibility parameters, serum total Bilirubin ≤ULN (ULN: 1.2 mg/dl) (or ≤3.0 mg/dL for patients with Gilbert's syndrome), AST or ALT <1.5x ULN and Serum creatinine ≤1.5 x ULN
• Willing to abstain from consumption of any supplements containing GTC
• Willing to restrict tea consumption to less than three (3) servings of hot tea or three (3) servings of iced tea per week
• Willing to discontinue current vitamin/mineral supplement use and use one provided by study
• Willing to take study agent or placebo at the dose specified with meals.

Exclusion Criteria

• Have had prior treatment for PCa by surgery, irradiation, local ablative (i.e., cryosurgery or high-intensity focused ultrasound), or androgen-deprivation therapy)
• Men who are currently treated or those treated in the past 3 months prior to day of randomization with 5- alpha-reductase inhibitors (e.g., finasteride, dutasteride)
• Participants who have PCa with distant metastases
• Participants who have been treated with: hormone therapy, immunotherapy, chemotherapy and/or radiation, for any malignancies within the past 2 years prior to registration.Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial. All patients with metastatic disease will be excluded
• Participants may not be receiving any other investigational agents
• History of allergic reactions attributed to tea or compounds of similar chemical or biologic composition to green tea extracts.

• Minimum Eligible Age: 18 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

National Cancer Institute (NCI)

NIH

Sponsor Role: collaborator

H. Lee Moffitt Cancer Center and Research Institute

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Nagi Kumar, PhD RD FADA

Role: PRINCIPAL_INVESTIGATOR

Moffitt Cancer Center

Locations

Moffitt Cancer Center

Tampa, Florida, United States

University of Kansas Cancer Center

Westwood, Kansas, United States

Countries

United States

Other Identifiers

1R01CA235032-01A1

Identifier Type: NIH

Identifier Source: secondary_id

View Link

MCC-20056

Identifier Type: -

Identifier Source: org_study_id