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Plasma and mucosal fatty acid pattern in colectomized ulcerative colitis patients
M Esteve1, E Navarro, J Klaassen
1Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona, Catalonia, Spain.
Digestive Diseases and Sciences
|May 20, 1998
Summary
Plasma fatty acid abnormalities in inflammatory bowel disease (IBD) are linked to the presence of inflamed intestines, not a primary metabolic defect. Colectomy normalizes plasma fatty acid profiles, but ileal reservoirs show inflammation-related changes.
Area of Science:
- Gastroenterology
- Metabolic research
- Inflammation biology
Background:
- Patients with inflammatory bowel disease (IBD) exhibit altered plasma fatty acid (FA) profiles, specifically increased n3 polyunsaturated fatty acids (PUFAs).
- These alterations persist post-colectomy in ulcerative colitis (UC) patients, suggesting a potential primary defect in FA metabolism.
Purpose of the Study:
- To investigate plasma FA patterns in UC patients long-term after colectomy, comparing those with Brooke's ileostomy (UC-BI) and ileal pouch anal anastomosis (UC-IPAA).
- To analyze the mucosal FA composition within the ileal reservoir of UC-IPAA patients.
- To determine if observed plasma FA changes are intrinsic to IBD or associated with active intestinal inflammation.
Main Methods:
- Plasma FA analysis using capillary column gas-liquid chromatography in 63 UC colectomized patients (31 UC-BI, 32 UC-IPAA) and 30 controls.
- Ileal mucosal FA analysis in 26 UC-IPAA patients (8 with pouchitis, 18 without) and 13 healthy controls.
Main Results:
- Long-term colectomy normalized plasma FA profiles in UC patients; increased saturated fatty acids (SFAs) and decreased monounsaturated fatty acids (MUFAs) were observed, but not altered n3/n6 PUFAs.
- Ileal reservoir mucosa showed increased long-chain PUFAs (especially n6) and decreased precursors, alongside high SFAs and low MUFAs.
- These mucosal changes mirrored patterns seen in active IBD, suggesting they are a consequence of intestinal inflammation.
Conclusions:
- The plasma FA profile alterations previously seen in IBD are not a long-term consequence of colectomy, indicating they are associated with the presence of inflamed intestinal tissue.
- Elevated SFAs and reduced MUFAs in plasma may indicate early disturbances in FA metabolism during active IBD.
- The FA composition of the ileal reservoir reflects intestinal inflammation, presenting a common pattern observed in both human and experimental IBD.