Inducible Nitric Oxide Synthase and Guinea-Pig Ileitis Induced by Adjuvant
Author Information
Author(s): N. D. Seago, J. H. Thompson, X.-J. Zhang, S. Eloby-Childress, H. Sadowska-Krowicka, J. L. Rossi, M. G. Currie, P. T. Manning, D. A. Clark, M. J. S. Miller
Primary Institution: Louisiana State University Medical Center
Hypothesis
Can the local immune system be augmented to establish a model of inflammatory bowel disease using Freund's complete adjuvant?
Conclusion
Local administration of adjuvant establishes a chronic ileitis, with inducible nitric oxide synthase contributing to the inflammatory process.
Supporting Evidence
- Adjuvant administration resulted in a persistent ileitis with gut thickening and cellular infiltration.
- Nitrite and PGE2 levels were markedly elevated in lavage fluid after adjuvant treatment.
- Immunohistochemistry showed significant iNOS activity in enteric neurons and epithelia.
- Cellular infiltration shifted from granulocytes to macrophages and lymphocytes over time.
Takeaway
Researchers used a special treatment to make guinea pigs sick in a way that mimics a human gut disease, helping us understand how to treat it better.
Methodology
Guinea pigs were treated with ethanol and Freund's complete adjuvant, and various analyses were performed on their ileal tissue and lavage fluid after 7 and 14 days.
Limitations
The model may not fully replicate human inflammatory bowel disease and is better suited for ulcerative colitis than Crohn's disease.
Participant Demographics
Fasted Hartley guinea-pigs of either sex, weighing 250-450 g.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
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