title: A murine model of obesity implicates the adipokine milieu in the pathogenesis of severe acute pancreatitis.
abstract: Obesity is clearly an independent risk factor for increased severity of acute pancreatitis (AP), although the mechanisms underlying this association are unknown. Adipokines (including leptin and adiponectin) are pleiotropic molecules produced by adipocytes that are important regulators of the inflammatory response. We hypothesized that the altered adipokine milieu observed in obesity contributes to the increased severity of pancreatitis. Lean (C57BL/6J), obese leptin-deficient (LepOb), and obese hyperleptinemic (LepDb) mice were subjected to AP by six hourly intraperitoneal injections of cerulein (50 microg/kg). Severity of AP was assessed by histology and by measuring pancreatic concentration of the proinflammatory cytokines IL-1beta and IL-6, the chemokine MCP-1, and the marker of neutrophil activation MPO. Both congenitally obese strains of mice developed significantly more severe AP than wild-type lean animals. Severity of AP was not solely related to adipose tissue volume: LepOb mice were heaviest; however, LepDb mice developed the most severe AP both histologically and biochemically. Circulating adiponectin concentrations inversely mirrored the severity of pancreatitis. These data demonstrate that congenitally obese mice develop more severe AP than lean animals when challenged by cerulein hyperstimulation and suggest that alteration of the adipokine milieu exacerbates the severity of AP in obesity.
authors.affiliation: Department of Surgery, Indiana University School of Medicine, 535 Barnhill Dr., RT 130, Indianapolis, IN 46202, USA. nzyromsk@iupui.edu
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Zyromski
authors.forename: Abhishek
authors.initials: A
authors.lastname: Mathur
authors.forename: Henry A
authors.initials: HA
authors.lastname: Pitt
authors.forename: Debao
authors.initials: D
authors.lastname: Lu
authors.forename: John T
authors.initials: JT
authors.lastname: Gripe
authors.forename: Julia J
authors.initials: JJ
authors.lastname: Walker
authors.forename: Kyle
authors.initials: K
authors.lastname: Yancey
authors.forename: Terence E
authors.initials: TE
authors.lastname: Wade
authors.forename: Deborah A
authors.initials: DA
authors.lastname: Swartz-Basile
mesh_terms: D000208:Acute Disease; D054392:Adipokines / Q000235:genetics / Q000378:metabolism*; D052242:Adiponectin / Q000378:metabolism; D000681:Amylases / Q000097:blood; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight; D002108:Ceruletide; D018925:Chemokines / Q000378:metabolism; D016207:Cytokines / Q000378:metabolism; D004195:Disease Models, Animal; D005260:Female; D007328:Insulin / Q000097:blood; D020738:Leptin / Q000378:metabolism; D008168:Lung / Q000201:enzymology; D051379:Mice; D008810:Mice, Inbred C57BL; D008820:Mice, Obese; D009765:Obesity / Q000150:complications* / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D010179:Pancreas / Q000201:enzymology / Q000378:metabolism* / Q000473:pathology; D010195:Pancreatitis / Q000139:chemically induced / Q000209:etiology* / Q000378:metabolism / Q000473:pathology; D009195:Peroxidase / Q000378:metabolism; D012720:Severity of Illness Index
chemical_list: D054392:Adipokines; D052242:Adiponectin; C499919:Adipoq protein, mouse; D001786:Blood Glucose; D018925:Chemokines; D016207:Cytokines; D007328:Insulin; D020738:Leptin; D002108:Ceruletide; D009195:Peroxidase; D000681:Amylases