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Uncoupling protein 3 expression and intramyocellular lipid accumulation by NMR following local burn trauma.

Abstract：

:Burn trauma is a clinical condition accompanied by muscle wasting that severely impedes rehabilitation in burn survivors. Mitochondrial uncoupling protein 3 (UCP3) is uniformly expressed in myoskeletal mitochondria and its expression has been found to increase in other clinical syndromes that, like burn trauma, are associated with muscle wasting (e.g., starvation, fasting, cancer, sepsis). The aim of this study was to explore the effects of burn trauma on UCP3 expression, intramyocellular lipids, and plasma-free fatty acids. Mice were studied at 6 h, 1 d and 3 d after nonlethal hindlimb burn trauma. Intramyocellular lipids in hindlimb skeletal muscle samples collected from burned and normal mice were measured using 1H NMR spectroscopy on a Bruker 14.1 Tesla spectrometer at 4 degrees C. UCP3 mRNA and protein levels were also measured in these samples. Plasma-free fatty acids were measured in burned and normal mice. Local burn trauma was found to result in: 1) upregulation of UCP3 mRNA and protein expression in hindlimb myoskeletal mitochondria by 6 h postburn; 2) increased intramyocellular lipids; and 3) increased plasma-free fatty acids. Our findings show that the increase in UCP3 after burn trauma may be linked to burn-induced alterations in lipid metabolism. Such a link could reveal novel insights into how processes related to energy metabolism are controlled in burn and suggest that induction of UCP3 by burn in skeletal muscle is protective by either activating cellular redox signaling and/or mitochondrial uncoupling.

journal_name

Int J Mol Med

journal_title

International journal of molecular medicine

authors

Zhang Q,Cao H,Astrakas LG,Mintzopoulos D,Mindrinos MN,Schulz J 3rd,Tompkins RG,Rahme LG,Tzika AA

subject

Has Abstract

pub_date

2006-12-01 00:00:00

pages

1223-9

issue

6

eissn

1107-3756

issn

1791-244X

journal_volume

18

pub_type

杂志文章

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