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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Partial Replacement of omega-6 Fatty Acids With Medium-Chain Triglycerides, but Not Olive Oil, Improves Colon Cytokine Response and Damage in Experimental Colitis

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Author(s):
Bertevello, Pedro L. [1] ; De Nardi, Leticia [1] ; Torrinhas, Raquel S. [1] ; Logullo, Angela F. [2] ; Waitzberg, Dan L. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sch Med FMUSP, Dept Gastroenterol, Digest Surg Div LIM 35, BR-01243906 Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, Paulista Sch Med UNIFESP EPM, Dept Pathol, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Parenteral and Enteral Nutrition; v. 36, n. 4, p. 442-448, JUL 2012.
Web of Science Citations: 11
Abstract

Background: Soybean oil is rich in omega-6 fatty acids, which are associated with higher incidence and more severe cases of inflammatory bowel diseases. The authors evaluated whether partial replacement of soybean oil by medium-chain triglycerides (MCTs) or olive oil influenced the incidence and severity of experimental ulcerative colitis by using different parenteral lipid emulsions (LEs). Methods: Wistar rats (n = 40) were randomized to receive parenteral infusion of the following LE: 100% soybean oil (SO), 50% MCT mixed with 50% soybean oil (MCT/SO), 80% olive oil mixed with 20% soybean oil (OO/SO), or saline (CC). After 72 hours of infusion, acetic acid experimental colitis was induced. After 24 hours, colon histology and cytokine expression were analyzed. Results: SO was not significantly associated with overall tissue damage. MCT/SO was not associated with necrosis (P < .005), whereas OO/SO had higher frequencies of ulcer and necrosis (P < .005). SO was associated with increased expression of interferon-gamma (P = .005) and OO/SO with increased interleukin (IL)-6 and decreased tumor necrosis factor-alpha expression (P < .05). MCT/SO appeared to decrease IL-1 (P < .05) and increase IL-4 (P < .001) expression. Conclusions: Parenteral SO with high concentration of omega-6 fatty acids was not associated with greater tissue damage in experimental colitis. SO partial replacement with MCT/SO decreased the frequency of histological necrosis and favorably modulated cytokine expression in the colon; however, replacement with OO/SO had unfavorable effects. (JPEN J Parenter Enteral Nutr. 2012; 36: 442-448) (AU)