Green Tea Extract in Treating Patients With Low-Risk Prostate Cancer

Phase 2

Terminated

Conditions: Stage I Prostate Cancer
Stage IIB Prostate Cancer
Stage IIA Prostate Cancer

Interventions: Other: active surveillance
Drug: Sunphenon
Other: laboratory biomarker analysis
Other: Questionnaire Administration

Registration Number: NCT01928485

Lead Sponsor: Sanjay Gupta PhD

Brief Summary: This randomized phase II trial studies how well green tea extract works in treating patients with low-risk prostate cancer. Green tea extract contains ingredients that may prevent or slow the growth of certain cancers.

Detailed Description: PRIMARY OBJECTIVES:

I. To assess changes in the levels of total- and free- prostate-specific antigen (PSA), free to total PSA (f/tPSA) ratio and insulin-like growth factor 1 (IGF-I) levels and IGF-I/free PSA (fPSA) ratio, insulin-like growth factor binding protein 3 (IGFBP-3), and vascular endothelial growth factor (VEGF) after Sunphenon 90DCF-T (green tea extract) supplementation during the period between recruitment and biopsy.

SECONDARY OBJECTIVES:

I. To evaluate the effects of oral ingestion on Sunphenon 90DCF-T supplementation during the period between recruitment and biopsy in the reactivation of glutathione S-transferase pi 1 (GSTP1) (whole blood deoxyribonucleic acid \[DNA\]); levels of antigen identified by monoclonal antibody Ki-67 (Ki-67), cluster of differentiation 34 (CD34), and M30 apopotosense in the prostate tissue.

II. To evaluate the effects of oral ingestion of Sunphenon 90DCF-T during the period between recruitment and biopsy on histologic findings in prostate tissue such as nuclear measurements viz. shape, size and texture and quality of life (QOL) assessment.

OUTLINE: Patients are randomized to 1 of 2 treatment arms.

ARM A: Patients undergo active surveillance for 52 weeks.

ARM B: Patients receive green tea extract orally (PO) once daily (QD) for 52 weeks in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up for 30 days.

Recruitment & Eligibility

Status: TERMINATED

Sex: Male

Target Recruitment: 6

Inclusion Criteria

Patients must be males with histologically confirmed and clinically localized low-grade and low-volume prostate cancer demonstrated at the time of initial diagnosis
Prostate biopsy must be positive for cancer: clinically localized T1c or T2a, PSA ≤ 10, Gleason ≤ 6 at the time of initial diagnosis. As the intent of serial biopsy is to ensure that the disease has not progressed to the stage or grade of requiring treatment, the presence of a negative biopsy following an initial positive biopsy (coupled with clinically localized T1c or T2a PSA ≤10 and Gleason ≤6 for a patient who has had no treatment, will not render the patient ineligible. If the consecutive biopsy is either negative, or if positive and remains clinically localized T1c or T2a, PSA≤10 and Gleason ≤6, the patient is eligible
Willing to refrain from the concurrent use of high-dose (200 mg or higher per day) of vitamins, antioxidants, Proscar, Advodart, and anti-inflammatory agents
Willing to sign an Institutional Review Board (IRB)-approved informed consent document and adhere to the protocol
Willing and able to take oral medications
Willing to refrain from drinking any kind of tea (including herbal tea) or using supplements containing green tea for the duration of the study
Subjects must have newly diagnosed (within 1 year), previously untreated prostate cancer without other malignancy; therefore, no prior therapies are permitted
Total bilirubin within normal institutional limits
Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase [SGOT]) ≤ institutional upper limit of normal
Alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase [SGPT]) ≤ institutional upper limit of normal
Serum creatinine within normal institutional limits
Subject must be willing to limit alcohol to moderate use which is defined as: up to one drink a day for women or two drinks a day for men; examples of one drink include:
- Beer: 12 fluid ounces (355 milliliters)
- Wine: 5 fluid ounces (148 milliliters)
- Distilled spirits (80 proof): 1.5 fluid ounces (44 milliliters)

Exclusion Criteria

Patients who are receiving any other investigational agents
Patients with known concurrent malignancy
History of allergic reactions attributed to compounds of similar chemical or biologic composition to Sunphenon 90 DCF-T or other agents used in this study
Recent consumption of tea (six or more cups per day) or use of supplements containing green tea within one week of randomization; or concomitant use of at least 400 mg per day of a nonsteroidal anti-inflammatory (NSAID) agent two or more times per week
Patients with uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
Patients who have received prior hormonal or surgical therapy for prostate cancer; including prior brachytherapy or radiation therapy
Signs or symptoms of progressive or uncontrolled liver disease
Known malignancy at any site within the last two years; with the exception of basal cell carcinoma (BCC)
Participation in a research trial within the past three months
Any condition that would interfere with the ability to give informed consent or comply with the study protocol
Hypersensitivity to tea products or any of the inactive ingredients found in the drug product capsules
Patients with a known history of Gilbert's syndrome

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Arm B (Sunphenon)	laboratory biomarker analysis	Patients receive Sunphenon PO QD for 52 weeks in the absence of disease progression or unacceptable toxicity.
Arm A (active surveillance)	active surveillance	Patients undergo active surveillance for 52 weeks.
Arm A (active surveillance)	Questionnaire Administration	Patients undergo active surveillance for 52 weeks.
Arm B (Sunphenon)	Questionnaire Administration	Patients receive Sunphenon PO QD for 52 weeks in the absence of disease progression or unacceptable toxicity.
Arm A (active surveillance)	laboratory biomarker analysis	Patients undergo active surveillance for 52 weeks.
Arm B (Sunphenon)	Sunphenon	Patients receive Sunphenon PO QD for 52 weeks in the absence of disease progression or unacceptable toxicity.

Primary Outcome Measures

Name	Time	Method
Total-PSA (tPSA) Levels	From baseline at 52 weeks	tPSA serum levels
Changes in the IGF-I/fPSA Ratio	Baseline up to 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.
Changes in the f/tPSA Ratio	From baseline at 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.
Changes in the Level of VEGF	Baseline up to 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.
Changes in IGF-I Levels	Baseline to 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.
Changes in the Levels of Free-PSA (f-PSA)	from baseline at 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.
Changes in the Level of IGFBP-3	Baseline to 52 weeks	The difference of serum biomarkers between two treatment arms will be compared using T-test or Kruskal-Wallis test if normality is violated.

Secondary Outcome Measures

Name	Time	Method
Urinary Symptoms as Assessed by Mean American Urological Association Symptom Index (AUA)	At 3.5 years from start of study	Urinary symptoms as assessed by American Urological Association Symptom Index (AUA). This is a 7-item symptom index measures frequency, nocturia, weakness of stream, hesitancy, intermittence, incomplete emptying and urgency. Scores range between 0 to 35, with higher scores indicating a worse clinical assessment.
Effects of Oral Ingestion of Green Tea Extract on Levels of Ki-67	Up to 52 weeks	The temporal pattern of biomarkers within same treatment group between baseline and subsequent time points will be analyzed using repeated measures ANOVA.
Effects of Oral Ingestion of Green Tea Extract on Levels of CD34	Up to 52 weeks	The temporal pattern of biomarkers within same treatment group between baseline and subsequent time points will be analyzed using repeated measures ANOVA.
Effects of Oral Ingestion of Green Tea Extract on Levels of M30 Apoptosense in the Prostate Tissue	Up to 52 weeks	The temporal pattern of biomarkers within same treatment group between baseline and subsequent time points will be analyzed using repeated measures ANOVA.
Quality of Life (QOL) Assessed by Mean Expanded Prostate Cancer Index Composite (EPIC-26) Scores	at 3.5 years from start of study	Quality of Life (QOL) assessed by the Expanded Prostate Cancer Index Composite (EPIC-26). Scores for each domain (urinary incontinence, bowel, sexual, hormonal) range from 0-100, with higher scores indicating better clinical assessment.
Quality of Life (QOL) Assessed by Mean Medical Outcomes Study 12-item Short Form Health Survey (SF-12)	At 3.5 years from start of study	Quality of Life (QOL) assessed by SF-12. The questionnaire consists of 12 items questioned weighted and summed to provide physical and mental health scores (PCS and MCS). The two composite scores are computed using the scores on twelve questions that range from 0 to 100, with higher score indicating better health.
Effects of Oral Ingestion of Green Tea Extract in the Reactivation of GSTP1 (Whole Blood DNA)	Up to 52 weeks	The temporal pattern of biomarkers within same treatment group between baseline and subsequent time points will be analyzed using repeated measures analysis of variance (ANOVA).
Effects of Oral Ingestion of Sunphenon 90 DCF-T on Histologic Findings in Prostate Tissue Such as Nuclear Measurements Viz. Shape, Size and Texture	Up to 52 weeks	Effects of oral ingestion of Sunphenon 90 DCF-T on histologic findings in prostate tissue such as nuclear measurements viz. shape, size and texture
Sexual Health Inventory in Men Score (SHIM Score)	Baseline, at 24 weeks, and at 3.5 years from start of study	SHIM score - The SHIM score measures the severity of the participant's Erectile Dysfunction (ED) in points on a scale as follows: 22 - 25: No significant erectile dysfunction 17 - 21: Mild erectile dysfunction 12 - 16: Mild-to-moderate erectile dysfunction 8 - 11: Moderate erectile dysfunction 5 - 7: Severe erectile dysfunction Reported values are an average of three collected data points per participant: at baseline, at 24 weeks, and at end of study (3.5 years)