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Greatly increased luminal nitric oxide in ulcerative colitis
J O Lundberg1, P M Hellström, J M Lundberg
1Department of Pharmacology, Karolinska Institute, Stockholm.
Lancet (London, England)
|December 17, 1994
Summary
Patients with active ulcerative colitis have significantly higher levels of luminal nitric oxide (NO) in their colons compared to healthy individuals. This direct measurement of NO offers a potential new method for monitoring inflammatory bowel disease.
Area of Science:
- Gastroenterology
- Biomedical Science
- Inflammatory Bowel Disease Research
Background:
- Previous indirect assays suggested increased nitric oxide (NO) synthase activity in ulcerative colitis.
- The precise role and levels of luminal NO in active ulcerative colitis remained unclear.
Purpose of the Study:
- To directly measure luminal nitric oxide (NO) concentrations in the colon of patients with active ulcerative colitis.
- To compare NO levels between patients and healthy controls.
- To assess the potential of luminal NO measurement as a monitoring tool for inflammatory bowel disease.
Main Methods:
- Direct measurement of luminal NO in the colon using gas aspiration during colonoscopy.
- Analysis of aspirated gas via chemiluminescence technique.
- Inclusion of twelve healthy controls and six patients with active ulcerative colitis.
Main Results:
- Luminal NO concentrations were found to be over 100 times higher in patients with active ulcerative colitis compared to controls.
- Direct measurement of luminal NO was rapid and easily performed.
Conclusions:
- Direct measurement of luminal NO is a feasible method for assessing NO levels in the colon.
- Elevated luminal NO is a significant finding in active ulcerative colitis.
- Luminal NO measurement may serve as a valuable, non-invasive biomarker for monitoring inflammatory bowel disease activity.