[Studies on the changes in expression of hypoxia induction factor-1alpha in myocardial tissue in severely scalded rats during early postburn stage].
OBJECTIVE
To investigate the changes in the expression of hypoxia induction factor-1alpha (HIF1-alpha) in myocardial tissues in severely scalded rats during early postburn stage.


METHODS
Male Wistar rats inflicted with 40% TBSA III degree scald were employed as the model. The myocardial tissue samples were harvested from the left and right ventricles at different postburn time points, and samples were also obtained from normal rats as control. The mRNA and protein expressions of HIF-1alpha in rat myocardial tissue were determined by RT-PCR and Western blot analysis respectively.


RESULTS
There was a difference of HIF-1alpha expression between left and right ventricles of the normal rats at both transcriptional and translational levels, and the mRNA and protein expressions of HIF-1alpha in the myocardial tissue of scalded rats were increased dramatically at early postburn stage.


CONCLUSIONS
The tolerance to ischemia and hypoxia of the rat left ventricle was higher than that of the right ventricle under normal condition. An increase in HIF1alpha expression in rat myocardial tissue could be induced in severely scalded rats.
Dang
Yong-Ming
YM
Institute of Burn Research, Southwestern Hospital, State Key Laboratory of Trauma, Burns and Combined Injury, The Third Military Medical University, Chongqing 400038, P.R. China.
Huang
Yue-Sheng
YS
Chen
Li-Feng
LF
D000818:Animals; D002056:Burns / Q000378:metabolism*; D006352:Heart Ventricles / Q000378:metabolism; D000860:Hypoxia / Q000503:physiopathology; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000235:genetics / Q000378:metabolism*; D008297:Male; D017202:Myocardial Ischemia / Q000503:physiopathology; D009206:Myocardium / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley
D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D012333:RNA, Messenger