Insulin protects against hepatic damage postburn

Marc G. Jeschke, Robert Kraft, Juquan Song, Gerd G. Gauglitz, Robert A. Cox, Natasha C. Brooks, Celeste Finnerty, Gabriela A. Kulp, David Herndon, Darren Boehning

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Burn injury causes hepatic dysfunction associated with endoplasmic reticulum (ER) stress and induction of the unfolded protein response (UPR). ER stress/UPR leads to hepatic apoptosis and activation of the Jun-N-terminal kinase (JNK) signaling pathway, leading to vast metabolic alterations. Insulin has been shown to attenuate hepatic damage and to improve liver function. We therefore hypothesized that insulin administration exerts its effects by attenuating postburn hepatic ER stress and subsequent apo-ptosis. Male Sprague Dawley rats received a 60% total body surface area (TBSA) burn injury. Animals were randomized to receive saline (controls) or insulin (2.5 IU/kg q. 24 h) and euthanized at 24 and 48 h postburn. Burn injury induced dramatic changes in liver structure and function, including induction of the ER stress response, mitochondrial dysfunction, hepatocyte apoptosis, and up-regulation of inflammatory mediators. Insulin decreased hepatocyte caspase-3 activation and apoptosis significantly at 24 and 48 h postburn. Furthermore, insulin administration decreased ER stress significantly and reversed structural and functional changes in hepatocyte mitochondria. Finally, insulin attenuated the expression of inflammatory mediators IL-6, MCP-1, and CINC-1. Insulin alleviates burn-induced ER stress, hepatocyte apoptosis, mitochondrial abnormalities, and inflammation leading to improved hepatic structure and function significantly. These results support the use of insulin therapy after traumatic injury to improve patient outcomes.

Original languageEnglish (US)
Pages (from-to)516-522
Number of pages7
JournalMolecular Medicine
Volume17
Issue number5-6
DOIs
StatePublished - May 2011

Fingerprint

Endoplasmic Reticulum Stress
Insulin
Liver
Hepatocytes
Apoptosis
Unfolded Protein Response
Wounds and Injuries
Body Surface Area
Heat-Shock Proteins
Burns
Caspase 3
Sprague Dawley Rats
Interleukin-6
Mitochondria
Phosphotransferases
Up-Regulation
Inflammation

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Molecular Medicine
  • Genetics(clinical)

Cite this

Jeschke, M. G., Kraft, R., Song, J., Gauglitz, G. G., Cox, R. A., Brooks, N. C., ... Boehning, D. (2011). Insulin protects against hepatic damage postburn. Molecular Medicine, 17(5-6), 516-522. https://doi.org/10.2119/molmed.2010.00166

Insulin protects against hepatic damage postburn. / Jeschke, Marc G.; Kraft, Robert; Song, Juquan; Gauglitz, Gerd G.; Cox, Robert A.; Brooks, Natasha C.; Finnerty, Celeste; Kulp, Gabriela A.; Herndon, David; Boehning, Darren.

In: Molecular Medicine, Vol. 17, No. 5-6, 05.2011, p. 516-522.

Research output: Contribution to journalArticle

Jeschke, MG, Kraft, R, Song, J, Gauglitz, GG, Cox, RA, Brooks, NC, Finnerty, C, Kulp, GA, Herndon, D & Boehning, D 2011, 'Insulin protects against hepatic damage postburn', Molecular Medicine, vol. 17, no. 5-6, pp. 516-522. https://doi.org/10.2119/molmed.2010.00166
Jeschke MG, Kraft R, Song J, Gauglitz GG, Cox RA, Brooks NC et al. Insulin protects against hepatic damage postburn. Molecular Medicine. 2011 May;17(5-6):516-522. https://doi.org/10.2119/molmed.2010.00166
Jeschke, Marc G. ; Kraft, Robert ; Song, Juquan ; Gauglitz, Gerd G. ; Cox, Robert A. ; Brooks, Natasha C. ; Finnerty, Celeste ; Kulp, Gabriela A. ; Herndon, David ; Boehning, Darren. / Insulin protects against hepatic damage postburn. In: Molecular Medicine. 2011 ; Vol. 17, No. 5-6. pp. 516-522.
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