The Effects of Naltrexone on Active Crohn's Disease (LDN)
It is hypothesized that the opioid antagonist naltrexone will improve inflammation of the bowel and quality of life in subjects with active Crohn's disease compared to placebo. In order to test this hypothesis the following specific aims are proposed:
- Evaluate the effects of low dose naltrexone compared to placebo on the activity of Crohn's disease by the following end points: Crohn's Disease Activity Index (CDAI), pain assessment, laboratory values (CRP and ESR), endoscopic appearance, histology, and quality of life surveys;
- Examine the effects of naltrexone given over 3 months compared to 6 months for durability of response;
- Determine the safety and toxicity of low dose naltrexone in subjects with active Crohn's disease, and
- Study the mechanism by which naltrexone exerts its effect by measuring plasma enkephalin levels of subjects on therapy.
Purpose statement: The purpose of this study is to evaluate the effects of low dose naltrexone in a blinded placebo controlled study to determine the safety and efficacy of this compound in those with active Crohn's disease.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||The Effects of Naltrexone in Active Crohn's Disease|
- Percentage of Subjects Achieving a 70-point Decline in CDAI Scores (Crohn's Disease Activity Index) Scores; [ Time Frame: 3 months ] [ Designated as safety issue: No ]The CDAI score is a number which consists of information collected from a 7-day diary from the patient regarding symptoms. It also includes objective information from the physical exam, weight and hemotocrit. Remission is considered a score of 150 or less. Active disease is considered 220 or greater. A response to therapy is considered a decline in the CDAI score of 70-points from baseline.
- Percentage Change From Baseline of Quality of Life IBDQ (Inflammatory Bowel Disease Quality of Life Survey) [ Time Frame: Between baseline and 3 months ] [ Designated as safety issue: No ]IBDQ (Inflammatory bowel Disease questionnaire) contains questions about health ranging from a score of poor (i.e., 32) to excellent (i.e., 224) an increase from baseline indicates improvement in quality of life.
- Percentage of Patients With a 5 Point Drop in CDEIS Score by Endoscopy [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]A secondary outcome was the appearance of the colonic mucosa on endoscopy using the Crohn's Disease Endoscopic Index of Severity (CDEIS) score described by Mary et al. Gut 1989;30:983-989.This score ranges from 0-44 based upon the extent and severity of inflammation and ulcers seen during endoscopy of the colon. A response is a drop of > 5 points from baseline. Endoscopic remission is a score of < 6 and Complete endoscopic remission is a score of > 3.
- Histology Inflammatory Score by Colon Biopsies [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]Histology scores to assess microscopic inflammation and structural architecture were determined at baseline and after 12 weeks of either naltrexone therapy or placebo by mucosal biopsy samples obtained during colonoscopies.The pathology specimens were reviewed and scored by a Pathologist blinded to the treatment. The mean scores at baseline were the same between both groups.Differences between naltrexone and placebo treated subjects was assessed.The range in scores could be 0-25, with 0 representing no inflammation and 25 being maximum or severe inflammation..
|Study Start Date:||September 2006|
|Study Completion Date:||October 2009|
|Primary Completion Date:||October 2009 (Final data collection date for primary outcome measure)|
Placebo Comparator: Placebo, Sugar pill
placebo for 3 months blinded then followed by an open-labelled study and all are treated with naltrexone 4.5 mg for 3 additional months
naltrexone 4.5 mg
Other Names:Drug: Placebo
Other Name: sugar pill
Active Comparator: Naltrexone-HCl
Subjects are treated in a blinded fashion for 3 months with naltrexone 4.5 mg po for active Crohn's disease followed an open-labelled study where naltrexone is given an additional 3 months at 4.5 mg po; hence the total treatment interval in this arm is 6 months. The response to the intervention administered is measured in the activity index and mucosal healing by colonoscopy.
naltrexone 4.5 mg
Study design : The study is designed as a double-blind placebo controlled study for 3 months followed by a pseudo cross-over such that all subjects receiving placebo the first 3 months will receive active drug the second 3 months and all receiving naltrexone the first 3 months remain on the drug the last 3 months of this 6 month study.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00663117
|United States, Pennsylvania|
|Penn State Hershey Medical Center|
|Hershey, Pennsylvania, United States, 17033|
|Principal Investigator:||Jill P. Smith, M.D.||Pennsylvania State University College of Medicine|