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Substance P containing nerve fibers in ulcerative colitis
1Department of Surgery, University of Tokyo, Japan.
International Journal of Colorectal Disease
|June 25, 1998
Summary
Substance P nerve fibers are significantly altered in ulcerative colitis (UC). Both increased density and thickening of these fibers in the colon suggest a role in UC pathogenesis.
Area of Science:
- Gastroenterology
- Neuroscience
- Immunohistochemistry
Background:
- Ulcerative colitis (UC) is a chronic inflammatory bowel disease.
- The role of neuropeptides, such as substance P, in UC pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the distribution and morphology of substance P-containing nerve fibers in the colonic mucosa of UC patients.
- To compare these changes with those in Crohn's disease and healthy controls.
Main Methods:
- Immunohistochemistry was used to examine substance P nerve fibers in colonic biopsies.
- Digitized morphometry was employed for quantitative and morphological analysis.
Main Results:
- Linear density of substance P fibers was significantly higher in UC patients compared to Crohn's disease and control groups.
- Substance P fibers were significantly thicker and coarser in UC patients.
- In UC, moderate inflammation correlated with the highest fiber density, while severe inflammation showed the lowest.
Conclusions:
- Alterations in the density and morphology of substance P nerve fibers are observed in ulcerative colitis.
- These neuro-immunohistochemical changes may contribute to the underlying mechanisms of UC.