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Effects of ASA on Prostate Tissue

This study has been completed.
Fred Hutchinson Cancer Research Center
Information provided by (Responsible Party):
Daniel Lin, University of Washington Identifier:
First received: October 4, 2005
Last updated: May 24, 2016
Last verified: May 2016

Aspirin affects many physiological processes through its anti-inflammatory actions. Various cancers, including prostate cancer, appear to utilize inflammatory signals to facilitate their growth and progression.

We hypothesize that oral aspirin acts directly on prostate epithelial cells to alter COX-2-related metabolism and inhibit prostate cell growth.

Condition Intervention
Prostate Cancer
Drug: Aspirin
Drug: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: In Vivo Molecular Effects of Aspirin on Prostate Tissue

Resource links provided by NLM:

Further study details as provided by University of Washington:

Primary Outcome Measures:
  • Assess the effect of oral aspirin on in vivo prostate epithelial cells. [ Time Frame: 6 months ]

Secondary Outcome Measures:
  • Changes in COX-2 and COX-2 related gene expression in prostate biopsy tissue before and after the intervention; effects of the intervention on measures of apoptosis and cell cycle; effects of the intervention on global prostate gene expression. [ Time Frame: 6 months ]
  • To measure changes in COX-2 and COX-2 related gene expression in prostate biopsy tissue before and after a 6 month intervention with enteric coated aspirin (325mg/day). [ Time Frame: 6 months ]

Estimated Enrollment: 60
Study Start Date: December 2005
Study Completion Date: December 2015
Primary Completion Date: December 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Group A
Enteric coated aspirin 325mg, one tablet orally every day for six months prior to prostate biopsy.
Drug: Aspirin
325mg, one tablet orally, six months
Placebo Comparator: Group B
Enteric coated placebo, one tablet orally every day for six months prior to prostate biopsy.
Drug: Placebo
325mg, one tablet orally every day, 6 months

Detailed Description:

Prostate cancer is the most common non-cutaneous malignancy in men and is the second leading cause of cancer death among U.S. men. 221,000 new cases and 29,000 deaths are expected in 2003. The incidence of prostate cancer diagnosis is increasing at 3% per year. Prostate specific antigen (PSA) screening has resulted in improvements in early diagnosis of prostate cancer. However, available treatments all may have a significant negative effect on quality of life.

Studies have implicated a beneficial association between ASA use and a lower risk of other types of malignancies, including stomach, esophageal, breast, ovarian, and prostate cancer. There is significant evidence to suggest that aspirin has a protective effect against prostate cancer.


Ages Eligible for Study:   45 Years to 74 Years   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • May be on watchful waiting for low grade prostate cancer who are scheduled for biopsy to monitor disease.
  • Have a previous diagnosis of prostatic intraepithelial neoplasia (PIN)or atypical small acinar proliferation (ASAP) before either second biopsy or even is second biopsy still has PIN or ASAP and they are to undergo a third biopsy.
  • Extended-sector (at least 10 cores) prostate biopsy performed within three months of enrollment.
  • Prostate tissue frozen at time of prostate biopsy (UW #04-3963-V 01)
  • PSA less than 15.
  • Performance status 0 or 1 by the ECOG scale.
  • Ability to understand and willingness to sign an informed consent document.
  • Willingness to take 325mg enteric coated aspirin daily and abstain from any other NSAID, aspirin product, or COX-2 inhibitor during the study.
  • Willingness to abstain from any hormonal or herbal preparation indicated to affect hormone levels during the study.

Exclusion Criteria:

  • Any prior or concurrent hormonal therapy, chemotherapy, or investigational agents.
  • Use of Finasteride, Dutasteride, saw palmetto, or any herbal/nutritional preparation indicated to affect hormone levels.
  • Use of 325mg aspirin three or more times a week.
  • Use of NSAIDS three or more times a week.
  • Use of NSAIDs, Cox-2 inhibitors and/or aspirin for 6 weeks prior to study enrollment and during the 3-month intervention.
  • Known bleeding disorder.
  • History of gastrointestinal bleeding.
  • History of peptic or duodenal ulcer disease.
  • History of stroke.
  • History of serious bleeding, including but not limited to hemorrhagic stroke, epistaxis, hematuria, hematochezia, hemorrhoidal bleeding requiring cauterization.
  • Uncontrolled hypertension.
  • Aspirin sensitivity or allergy.
  • Liver disease with known ascites, varices, clotting disorder, or liver function test >1.5 normal.
  • Anemia, thrombocytopenia, prolonged INR.
  • Elective surgery scheduled during 3-month intervention.
  • Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, CHD presently requiring a revascularization procedure, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
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Please refer to this study by its identifier: NCT00234299

United States, Washington
VA Puget Sound Health Care Service
Seattle, Washington, United States, 98108
Sponsors and Collaborators
University of Washington
Fred Hutchinson Cancer Research Center
Principal Investigator: Daniel W Lin, MD Veteran's Administration Puget Sound Health Care Service
  More Information

Responsible Party: Daniel Lin, Chief of Uro-Oncology, University of Washington Identifier: NCT00234299     History of Changes
Other Study ID Numbers: 01426-V
05-7956-V 01 ( Other Identifier: University of Washington HSD )
28526-V ( Other Identifier: University of Washington HSD )
Study First Received: October 4, 2005
Last Updated: May 24, 2016

Keywords provided by University of Washington:
Preventive Therapy

Additional relevant MeSH terms:
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Fibrinolytic Agents
Fibrin Modulating Agents
Molecular Mechanisms of Pharmacological Action
Platelet Aggregation Inhibitors
Cyclooxygenase Inhibitors
Enzyme Inhibitors
Antipyretics processed this record on April 28, 2017