RESUMO
<p><b>OBJECTIVE</b>To investigate the influence of hyperoxic fluid on the down-regulated proteins of intestinal mucosa in scalded rats, so as to provide a theoretical basis for the clinical use of hyperoxic fluid.</p><p><b>METHODS</b>Sprague-Dawley (SD) rats with 35% TBSA full-thickness scald were randomly divided into scald control (S, n = 6,with intraperitoneal fluid infusion after scalding), hyperoxic (H, n = 6, with hyperoxic fluid infusion after scalding) groups. Six rats without scald injury served as normal group. The proteins in the intestinal mucosa were separated with the two-dimensional electrophoresis (2-DE), and were analyzed with ImageMaster 2D Elite. The influence of hyperoxic fluid on the down-regulated proteins of intestinal mucosa in scalded rats was studied with bio-spectrum, protein bank and document analysis.</p><p><b>RESULTS</b>(1) Among the 34 down-regulated protein spots in S group, 9 of them definitely exhibited up-regulation compared with those in H group. (2) The expression of mitochondrial aconitase, alpha-propionyl-CoA carboxylase, short chain of hydroxyacyl-Coenzyme A dehydrogenase, transcription factor EB (estradiol benzoate), triosephosphate isomerase 1, T cell receptor V delta 6, and dynein-like protein-5 in H group were significantly up-regulated.</p><p><b>CONCLUSION</b>The hyperoxic fluid could up-regulate the down-regulated proteins in rat intestinal mucosa at early postburn stage, so that the barrier function of intestinal mucosa of rats with severe burns could be partially recovered.</p>