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Pancreatic changes in TNBS-induced colitis in mice
Marc Barthet1, Laurent Dubucquoy, Stéphane Garcia
1INSERM EMI 116 Marseille, Hôpital Nord. mbarthet@mail.ap-hm.fr
Gastroenterologie Clinique Et Biologique
|November 25, 2003
Summary
Inflammatory bowel disease (IBD) may cause pancreatitis. This study found pancreatic damage and inflammation in mice with TNBS-induced colitis, suggesting a link between these conditions.
Area of Science:
- Gastroenterology
- Immunology
- Pathology
Background:
- Clinical observations suggest pancreatitis as a potential extraintestinal manifestation of inflammatory bowel disease (IBD).
- Experimental evidence directly linking IBD and pancreatitis is currently lacking.
- This study investigates pancreatic damage in a mouse model of colitis.
Purpose of the Study:
- To determine if experimental colitis induces pancreatic damage.
- To explore the inflammatory mechanisms involved in colitis-associated pancreatic changes.
Main Methods:
- Colitis was induced in Balb/C mice using trinitrobenzene sulfonic acid (TNBS).
- Pancreatic tissues were examined histologically and for the expression of pancreatitis-associated protein (PAP) and inflammatory cytokines (TNFα, IL-1β, IL-10) via immunohistochemistry and PCR.
- Control groups received saline or ethanol intrarectally.
Main Results:
- TNBS-induced colitis led to histological pancreatic damage in mice.
- Pancreatic expression of PAP and IL-1β mRNA was significantly increased in colitis models.
- While TNFα mRNA showed a trend towards increase, IL-10 mRNA levels remained unchanged.
Conclusions:
- Overexpression of PAP in the pancreas indicates early inflammatory stress during TNBS-induced colitis.
- Concomitant pancreatic overexpression of IL-1β and TNFα suggests a cytokine-mediated inflammatory mechanism.
- These findings support a potential link between inflammatory bowel disease and pancreatitis.