Defined Green Tea Catechin Extract in Treating Patients With Localized Prostate Cancer Undergoing Surgery

Phase II, Randomized, Double Blind, Placebo Controlled Pilot Study of Polyphenon E in Men With Localized Prostate Cancer Scheduled to Undergo Radical Prostatectomy

This randomized pilot phase II trial studies the side effects and how well defined green tea catechin extract works in treating patients with localized prostate cancer undergoing surgery. Defined green tea catechin extract contains ingredients that may prevent or slow the growth of certain cancers.

Study Overview

• Status: Terminated
• Conditions: Stage I Prostate Cancer; Stage IIA Prostate Cancer; Stage IIB Prostate Cancer
• Intervention / Treatment: Other: questionnaire administration; Other: immunohistochemistry staining method; Other: mass spectrometry; Other: placebo; Procedure: therapeutic conventional surgery; Other: immunoenzyme technique; Other: high performance liquid chromatography; Dietary supplement: defined green tea catechin extract

Detailed Description

OBJECTIVES:

I. To evaluate the short-term effects of daily Polyphenon E (defined green tea catechin extract) administration (800 mg epigallocatechin-3-gallate [EGCG] once daily [QD]) during the interval between prostate biopsy and radical prostatectomy (approximately 6 weeks) in men with localized prostate cancer.

II. Compare the change in levels of intermediate biomarkers (Ki-67, B-cell lymphoma 2 [Bcl2], cyclin D, KiP1/P27, vascular endothelial growth factor [VEGF], and cluster of differentiation [CD]31) in biopsy (pre-treatment) and prostatectomy (post-treatment) specimens collected from subjects treated with Polyphenon E or placebo during the period between biopsy and prostatectomy.

III. Compare the change in pre- and post-treatment serum prostate-specific antigen (PSA) level in subjects treated with Polyphenon E or placebo during the period between biopsy and prostatectomy.

IV. Evaluate bioavailability of catechins from Polyphenon E (plasma and tissue catechin levels, catechin metabolites in urine).

V. Evaluate the safety and tolerability of Polyphenon E in this subject population.

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

ARM I: Patients receive defined green tea catechin extract orally (PO) QD for 4-10 weeks in the absence of disease progression or unacceptable toxicity. Patients undergo radical prostatectomy between days 28-70.

ARM II: Patients receive placebo PO QD for 4-10 weeks in the absence of disease progression or unacceptable toxicity. Patients undergo radical prostatectomy between days 28-70.

After completion of study treatment, patients are followed up periodically.

• Study Type: Interventional
• Enrollment (Actual): 5
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • Ohio
    • Cleveland, Ohio, United States, 44106
      • Case Medical Center, University Hospitals Seidman Cancer Center, Case Comprehensive Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 45 years to 75 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• Prostate biopsy positive for cancer; clinically localized T1 and T2 stage disease expected, with biopsy specimen available for baseline biomarker measurements
• Scheduled for a radical prostatectomy
• 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 constituents for the duration of the study

Exclusion Criteria:

• Prior hormonal or surgical therapy for prostate cancer; including prior brachytherapy or radiation therapy
• Recent consumption of tea (six or more cups per day) or use of supplements containing green tea within one week of randomization
• Signs or symptoms of progressive or uncontrolled renal, hepatic, hematologic, endocrine, pulmonary, cardiac, neurologic or cerebral disease
• Serum creatinine >= 1.5 x upper limit of normal (ULN)
• Alanine aminotransferase (ALT) >= ULN
• Aspartate aminotransferase (AST) >= ULN
• Alkaline phosphatase (ALP) >= ULN
• Albumin (ALB) =< lower limit of normal (LLN)
• Total bilirubin >= ULN
• Known malignancy at any site within the last five 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
• Concomitant use of at least 400 mg per day of a nonsteroidal anti-inflammatory (NSAID) agent two or more times per week

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Arm I (Polyphenon E); Patients receive defined green tea catechin extract PO once daily QD for 4-10 weeks in the absence of disease progression or unacceptable toxicity. Patients undergo radical prostatectomy between days 28-70.	Other: questionnaire administration; Ancillary studies; Other: immunohistochemistry staining method; Correlative studies; Other Names: immunohistochemistry; Other: mass spectrometry; Correlative studies; Procedure: therapeutic conventional surgery; Undergo radical prostatectomy; Other: immunoenzyme technique; Correlative studies; Other Names: immunoenzyme techniques; Other: high performance liquid chromatography; Correlative studies; Other Names: HPLC; Dietary supplement: defined green tea catechin extract; Given PO; Other Names: Polyphenon E
Placebo Comparator: Arm II (placebo); Patients receive placebo PO QD for 4-10 weeks in the absence of disease progression or unacceptable toxicity. Patients undergo radical prostatectomy between days 28-70.	Other: questionnaire administration; Ancillary studies; Other: immunohistochemistry staining method; Correlative studies; Other Names: immunohistochemistry; Other: mass spectrometry; Correlative studies; Other: placebo; Given PO; Other Names: PLCB; Procedure: therapeutic conventional surgery; Undergo radical prostatectomy; Other: immunoenzyme technique; Correlative studies; Other Names: immunoenzyme techniques; Other: high performance liquid chromatography; Correlative studies; Other Names: HPLC

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Change in levels of intermediate biomarkers in prostate tissue (Ki-67, Bcl2, cyclin D, KiP1/P27, VEGF, and CD31) during treatment with defined green tea catechin extract or placebo during the period between biopsy and prostatectomy	Baseline and at or after 6 weeks of treatment

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Changes in the levels of free (f) PSA	PSA exists in the serum in different molecular forms and that the proportion of "complexed" PSA (PSA-ACT) to "free" PSA(F-PSA) is higher in prostate cancer patients [16]. F-PSA-to-PSA ratio remains constant in men without prostate cancer while total PSA increases. This F-PSA to-PSA ratio is useful diagnostic tool with borderline total PSA values (4.0 to 10.0 ng/mL); additionally values of 20% to 25% F-PSA eliminates 1/3 of biopsies in some studies; and F-PSA of 15.6% and PSA-ACT of 26.7% yielded 95% sensitivity [17]. The F-PSA-to-PSA ratio does not correlate to grade or stage of cancer.	After 0, 4, and 6 weeks
Catechin levels	Extraction of Catechins from Prostate Tissue, plasma and urine samples	At baseline, 4 weeks after supplementation, and at time of surgery
Number of pts with adverse events as a measure of safety and tolerability	AEs will be recorded from the date the informed consent document is signed until the day of surgery. Liver function tests including the Hepatic Function Panel [Alanine Aminotransferase (ALT), Albumin, Alkaline Phosphatase (ALP), Aspartate Aminotransferace (AST), total and direct Bilirubin], as well as amylase and lipase tests will be monitored at baseline and every four (4) weeks for the duration of the study.	At baseline and every 4 weeks
Changes in the levels of total (t) PSA	PSA exists in the serum in different molecular forms and that the proportion of "complexed" PSA (PSA-ACT) to "free" PSA(F-PSA) is higher in prostate cancer patients [16]. F-PSA-to-PSA ratio remains constant in men without prostate cancer while total PSA increases. This F-PSA to-PSA ratio is useful diagnostic tool with borderline total PSA values (4.0 to 10.0 ng/mL); additionally values of 20% to 25% F-PSA eliminates 1/3 of biopsies in some studies; and F-PSA of 15.6% and PSA-ACT of 26.7% yielded 95% sensitivity [17]. The F-PSA-to-PSA ratio does not correlate to grade or stage of cancer.	After 0, 4, and 6 weeks

Collaborators and Investigators

• Sponsor: Case Comprehensive Cancer Center
• Collaborators: National Cancer Institute (NCI)
• Investigators: Principal Investigator: Sanjay Gupta, Case Medical Center, University Hospitals Seidman Cancer Center, Case Comprehensive Cancer Center

Study record dates

Study Major Dates

• Study Start: October 1, 2006
• Primary Completion (Actual): April 1, 2007
• Study Completion (Actual): April 1, 2007

Study Registration Dates

• First Submitted: April 20, 2011
• First Submitted That Met QC Criteria: April 21, 2011
• First Posted (Estimate): April 22, 2011

Study Record Updates

• Last Update Posted (Estimate): March 15, 2012
• Last Update Submitted That Met QC Criteria: March 14, 2012
• Last Verified: March 1, 2012

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Urogenital Neoplasms; Neoplasms by Site; Genital Neoplasms, Male; Prostatic Diseases; Prostatic Neoplasms; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Antineoplastic Agents; Neuroprotective Agents; Protective Agents; Antioxidants; Anticarcinogenic Agents; Antimutagenic Agents; Epigallocatechin gallate
• Other Study ID Numbers: CASE13805; NCI-2011-00606 (Registry Identifier: CTRP (Clinical Trial Reporting Program))