This study will seek to determine if the downstream effects of cyclooxygenase-2 (COX-2) inhibition suggested by preclinical systems occur in human prostate cancer. To answer this question, men who have chosen prostatectomy will be randomly assigned to preoperative treatment with celecoxib or placebo for four weeks. Carefully collected tumor, premalignant, and benign prostate tissue will then be examined for apoptosis, androgen receptor and prostaglandin E2 levels. Tumor COX-2 expression will be correlated with observed treatment effects. The data generated by this study will serve as a foundation for the development of COX-2 targeted therapies for prostate cancer, will provide preliminary evidence for larger scale clinical trials aimed at treatment and prevention of prostate cancer, and will validate current preclinical models used to study COX-2 in prostate cancer.
PRIMARY OBJECTIVE I. To determine if COX-2 inhibition with celecoxib significantly increases apoptosis in human adenocarcinoma of the prostate. SECONDARY OBJECTIVES I. To determine if COX-2 inhibition with celecoxib reduces levels of Prostaglandin E2 and androgen receptor in fresh tumor tissue collected at prostatectomy II. To collect pre- and postoperative serum Prostate Specific Antigen (PSA) for exploratory analyses III. To determine the effect of celecoxib on adverse effects, perioperative surgical complications and post surgery analgesic use
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
34
Portland VA Medical Center
Portland, Oregon, United States
OHSU Knight Cancer Institute
Portland, Oregon, United States
Apoptosis Index, defined as the percent positive staining cells
Percent positively staining cells with a minimum of 1000 total cells counted. Descriptive statistics will be conducted. The apoptotic index will be reported with 95% confidence intervals.
Time frame: approximately 4 weeks of treatment
Prostaglandin and Androgen Receptor Levels
Descriptive statistical analysis will be conducted. The estimates will be reported with 95% confidence intervals.
Time frame: approximately 4 weeks of treatment
Percent Change in Median PSA Values, pre- and postoperatively
Pre- and postoperative PSA will be collected. Descriptive statistics will be conducted, comparing preoperative PSA level to postoperative level.
Time frame: approximately 4 weeks of treatment
Perioperative Analgesic Use, using morphine equivalents
Descriptive statistical analysis will be conducted. The estimate will be calculated using morphine equivalents dividend by length of hospital stay and reported with 95% confidence intervals.
Time frame: Prostatectomy to discharge from hospital, no more than 30 days post prostatectomy
Surgical Complications, defined as incidence of adverse events determined to be related to surgery graded by NCI CTCAE version 2.0
Intraoperative and post surgical complications will be collected and reported.
Time frame: Intraoperatively to 30 days postoperatively
Incidence of Adverse Events, graded by NCI CTCAE version 2.0
Descriptive statistical analysis will be conducted
Time frame: From start of treatment to 30 days post prostatectomy
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