Evaluation of Surgically Resected Colorectal Adenomas and Carcinomas After 7 Days Pretreatment With Celecoxib
- Conditions
- Colorectal AdenomaColorectal Carcinoma
- Interventions
- Drug: Placebo
- Registration Number
- NCT00582660
- Lead Sponsor
- University of Alabama at Birmingham
- Brief Summary
The purpose of this study is to assess how effective celecoxib is in limiting production of a hormone, prostaglandin, in the subject's body. It is felt that this hormone is involved in the evolution of pre-cancerous growths in the colon to cancerous stage or in the progression of an existing cancer. To answer this question, some subjects are given the new investigational drug, and other subjects a placebo. A placebo is a capsule that contains inactive ingredients. Only by comparing the response of two subject groups, one receiving placebo (inactive), and one receiving celecoxib (active), will we be able to know whether or not celecoxib actually works. The outcome we are assessing is the hormone activity before and after celecoxib is given.
- Detailed Description
We propose to test the hypothesis that celecoxib, a specific inhibitor of cyclooxygenase -2 (COX-2), will effectively inhibit the enzymatic activity in all tissues sampled after oral administration of celecoxib for 7 days preoperatively. One hundred twenty patients (120) undergoing standard surgical resection for the treatment of primary colorectal adenomas or carcinomas would be randomized to celecoxib or placebo given for 7 days prior to operation. Peripheral blood will be drawn prior to drug or placebo administration, and then morning of operation. At the time of definitive resection of the specimen, normal intestinal mucosa and primary tumor would be harvested and immediately snap frozen at -80 degrees. Levels of COX-2 activity (prostaglandin production) as well as expression of COX-2 and other markers (matrix metalloproteinases(MMPs), tissue inhibitors of MMPs (TIMPs), cell adhesion and cell cycle control molecules will be evaluated in normal mucosa and primary tumor compared between celecoxib and placebo treated patients.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 40
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Placebo for 7 days before surgery Placebo Placebo in a one to one randomization prior to surgery study drug BID for 7 days before surgery Celecoxib 400 mg Celecoxib the study drug will be given for 7 days before surgery
- Primary Outcome Measures
Name Time Method Number of Subjects Witha Change (IMPROVEMENT) in Colo-rectal Adenocarcinoma as Measured by Cyclooxygenase-2 Activity After 7 Days of Celecoxib baseline to 7 days The Colo-Rectal adenocarcinoma will be measured by cyclooxygenase-2(COX-2) activity at 7 days post baseline. Cox-2 activity is measured by assessing tumors and normal tissue using "Electron microscope and Tandem mass Spectrometry" methodology though the UAB shared Mass Spectrometry facility. Improvement was measured by 2-fold increase in COX-2 activity from baseline. The methodology used was High Performance Liquid Chromatography(HPLC). additional studies include expression of genes thought to be important in colorectal carcinogenesis: COX-1 and 2, MMP, 2 7, and 9, tissue inhibitor of metalloproteinases(TIMPs) 1 ans 2 and beta-catenin.
Subjects With Positive Response 72 Hours After Administration of Study Treatment as Measured by Immunoblot baseline to 72 hours At 72 hours after start of treatment, the number of subjects with immunoblot demonstrated a 1.5 to 2 fold increase in 15-LOX-1 protein expression in human colorectal adenocarcinoma cell line with epithelial morphology(HT-29) and dihydrolipoamide dehydrogenase(DLD)-1 cells.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
University of Alabama at Birmingham
🇺🇸Birmingham, Alabama, United States