Vitamin E Supplements in Preventing Cancer in Patients at Risk of Prostate Cancer or Who Have Prostate Cancer

This study has been completed.
Sponsor:
Collaborator:
Information provided by (Responsible Party):
Rutgers, The State University of New Jersey ( University of Medicine and Dentistry of New Jersey )
ClinicalTrials.gov Identifier:
NCT00895115
First received: May 7, 2009
Last updated: June 12, 2012
Last verified: June 2012
  Purpose

RATIONALE: Vitamin E supplements may stop or delay the development of prostate cancer in patients who are at risk of prostate cancer or who have prostate cancer. It is not yet known which vitamin E regimen is more effective in preventing prostate cancer.

PURPOSE: This randomized phase I trial is comparing vitamin E supplement regimens to see how well they work in preventing cancer in patients at risk of prostate cancer or who have prostate cancer.


Condition Intervention Phase
Prostate Cancer
Dietary Supplement: vitamin E
Procedure: sham intervention
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: A Randomized Study to Investigate the Presence of Tocopherol Metabolites in the Prostate

Resource links provided by NLM:


Further study details as provided by Rutgers, The State University of New Jersey:

Primary Outcome Measures:
  • Effect of tocopherol supplementation on plasma and urine levels of α-, γ-, and δ-tocopherols, PSA, and prostaglandin E2 [ Time Frame: 4 years ] [ Designated as safety issue: No ]
  • Oxidative stress and nitrosative stress as assessed by plasma levels of F2-isoprostane, C-reactive protein, and 3-nitrotyrosine as well as urinary levels of 8-hydroxy-2-deoxyguanosine (8-OHdG) [ Time Frame: 4 years ] [ Designated as safety issue: No ]
  • Levels of α-, γ-, and δ-tocopherols in prostate tissues and cell proliferation, apoptosis, cyclooxygenase-2, 8-OHdG, and 3-nitropyrosine levels as assessed by IHC [ Time Frame: 4 years ] [ Designated as safety issue: No ]

Enrollment: 65
Study Start Date: April 2009
Study Completion Date: May 2012
Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Sham Comparator: Arm I
Patients receive no supplementation.
Procedure: sham intervention
No supplementation
Experimental: Arm II
Patients receive oral high γ-tocopherol vitamin E supplementation once daily for 1 week.
Dietary Supplement: vitamin E
Given once daily
Experimental: Arm III
Patients receive oral high γ-tocopherol vitamin E supplementation once daily for 2 weeks.
Dietary Supplement: vitamin E
Given once daily

Detailed Description:

OBJECTIVES:

  • Determine the effect of tocopherol supplementation on plasma and urine levels of α-, γ-, and δ-tocopherols, PSA, and prostaglandin E_2 by comparing the blood and urine samples collected before and after the supplementation in patients with prostate cancer.
  • Test the hypothesis that the supplementation reduced oxidative and nitrosative stress by measuring plasma levels of F_2-isoprostane, C-reactive protein, and 3-nitrotyrosine as well as urinary levels of 8-hydroxy-2-deoxyguanosine (8-OHdG).
  • Determine the levels of α-, γ-, and δ-tocopherols in prostate tissues and analyze immunohistochemically (IHC) for cell proliferation, apoptosis, cyclooxygenase-2, 8-OHdG, and 3-nitropyrosine levels in prostate cancer/tissue slides.

OUTLINE: Patients are randomized into 1 of 3 arms.

  • Arm I: Patients receive no supplementation.
  • Arm II: Patients receive oral high γ-tocopherol vitamin E supplementation once daily for 1 week.
  • Arm III: Patients receive oral high γ-tocopherol vitamin E supplementation once daily for 2 weeks.

Blood, urine, and tissue samples are collected periodically and analyzed for oxidative/nitrosative stress and other markers (i.e., F2-isoprostane, 8-OHdG, 3-nitrotyrosine, prostaglandin E2, C-reactive protein, and PSA), biomarkers in prostate tumors and nontumorous tissues (i.e., 8-OHdG, 3-nitrotyrosine, and cyclooxygenase-2) by IHC, and pharmacokinetics by high-performance liquid chromatography.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

DISEASE CHARACTERISTICS:

  • Meets one of the following criteria:

    • Abnormal digital rectal examination or abnormal prostate specific antigen (> 4.0 ng/mL)
    • Obstructing prostate
    • Biopsy-proven prostate cancer
  • Scheduled to undergo prostate surgery (i.e., transurethral prostatectomy or prostatectomy)

PATIENT CHARACTERISTICS:

  • No uncontrolled diabetes, uncontrolled blood pressure, chronic congestive heart failure, or history of renal insufficiency
  • No personal or family history of a bleeding disorder
  • No known history of problems absorbing dietary fats (e.g., Crohn's disease, cystic fibrosis)

PRIOR CONCURRENT THERAPY:

  • More than 2 weeks since prior NSAIDs or corticosteroids
  • No concurrent supplementation of vitamin E (a multivitamin containing ≤ 60 IU of vitamin E is allowed)
  • No concurrent colestipol or orlistat
  • No concurrent warfarin or dicumarol
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00895115

Locations
United States, New Jersey
Cancer Institute of New Jersey at UMDNJ - Robert Wood Johnson Medical School
New Brunswick, New Jersey, United States, 08903
Sponsors and Collaborators
University of Medicine and Dentistry of New Jersey
Investigators
Principal Investigator: Susan Goodin, PharmD, FCCP, BCOP Rutgers Cancer Institute of New Jersey
  More Information

Additional Information:
No publications provided

Responsible Party: Rutgers, The State University of New Jersey ( University of Medicine and Dentistry of New Jersey )
ClinicalTrials.gov Identifier: NCT00895115     History of Changes
Other Study ID Numbers: 120802, P30CA072720, CDR0000639070
Study First Received: May 7, 2009
Last Updated: June 12, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by Rutgers, The State University of New Jersey:
prostate cancer

Additional relevant MeSH terms:
Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Neoplasms
Genital Diseases, Male
Prostatic Diseases
Vitamin E
Alpha-Tocopherol
Tocopherols
Tocotrienols
Vitamins
Antioxidants
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Protective Agents
Physiological Effects of Drugs
Micronutrients
Growth Substances

ClinicalTrials.gov processed this record on August 21, 2014