Lipotoxicity causes multisystem organ failure and exacerbates acute pancreatitis in obesity.

Abstract:

:Obesity increases the risk of adverse outcomes during acute critical illnesses such as burns, severe trauma, and acute pancreatitis. Although individuals with more body fat and higher serum cytokines and lipase are more likely to experience problems, the roles that these characteristics play are not clear. We used severe acute pancreatitis as a representative disease to investigate the effects of obesity on local organ function and systemic processes. In obese humans, we found that an increase in the volume of intrapancreatic adipocytes was associated with more extensive pancreatic necrosis during acute pancreatitis and that acute pancreatitis was associated with multisystem organ failure in obese individuals. In vitro studies of pancreatic acinar cells showed that unsaturated fatty acids were proinflammatory, releasing intracellular calcium, inhibiting mitochondrial complexes I and V, and causing necrosis. Saturated fatty acids had no such effects. Inhibition of lipolysis in obese (ob/ob) mice with induced pancreatitis prevented a rise in serum unsaturated fatty acids and prevented renal injury, lung injury, systemic inflammation, hypocalcemia, reduced pancreatic necrosis, and mortality. Thus, therapeutic approaches that target unsaturated fatty acid-mediated lipotoxicity may reduce adverse outcomes in obese patients with critical illnesses such as severe acute pancreatitis.

journal_name

Sci Transl Med

authors

Navina S,Acharya C,DeLany JP,Orlichenko LS,Baty CJ,Shiva SS,Durgampudi C,Karlsson JM,Lee K,Bae KT,Furlan A,Behari J,Liu S,McHale T,Nichols L,Papachristou GI,Yadav D,Singh VP

doi

10.1126/scitranslmed.3002573

subject

Has Abstract

pub_date

2011-11-02 00:00:00

pages

107ra110

issue

107

eissn

1946-6234

issn

1946-6242

pii

3/107/107ra110

journal_volume

3

pub_type

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