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Acute Lipotoxicity Regulates Severity of Biliary Acute Pancreatitis without Affecting Its Initiation.
MedLine Citation:
PMID:  24854864     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Obese patients have worse outcomes during acute pancreatitis (AP). Previous animal models of AP have found worse outcomes in obese rodents who may have a baseline proinflammatory state. Our aim was to study the role of acute lipolytic generation of fatty acids on local severity and systemic complications of AP. Human postpancreatitis necrotic collections were analyzed for unsaturated fatty acids (UFAs) and saturated fatty acids. A model of biliary AP was designed to replicate the human variables by intraductal injection of the triglyceride glyceryl trilinoleate alone or with the chemically distinct lipase inhibitors orlistat or cetilistat. Parameters of AP etiology and outcomes of local and systemic severity were measured. Patients with postpancreatitis necrotic collections were obese, and 13 of 15 had biliary AP. Postpancreatitis necrotic collections were enriched in UFAs. Intraductal glyceryl trilinoleate with or without the lipase inhibitors resulted in oil red O-positive areas, resembling intrapancreatic fat. Both lipase inhibitors reduced the glyceryl trilinoleate-induced increase in serum lipase, UFAs, pancreatic necrosis, serum inflammatory markers, systemic injury, and mortality but not serum alanine aminotransferase, bilirubin, or amylase. We conclude that UFAs are enriched in human necrotic collections and acute UFA generation via lipolysis worsens pancreatic necrosis, systemic inflammation, and injury associated with severe AP. Inhibition of lipolysis reduces UFA generation and improves these outcomes of AP without interfering with its induction.
Authors:
Chandra Durgampudi; Pawan Noel; Krutika Patel; Rachel Cline; Ram N Trivedi; James P DeLany; Dhiraj Yadav; Georgios I Papachristou; Kenneth Lee; Chathur Acharya; Deepthi Jaligama; Sarah Navina; Faris Murad; Vijay P Singh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of pathology     Volume:  184     ISSN:  1525-2191     ISO Abbreviation:  Am. J. Pathol.     Publication Date:  2014 Jun 
Date Detail:
Created Date:  2014-05-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370502     Medline TA:  Am J Pathol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1773-84     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2014 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved.
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