Evaluation of ischemic postconditioning effect on mesenteric ischemia treatment: experimental study in rats.
OBJECTIVE
To assess the preconditioning and postconditioning effect on intestinal mucosal lesions in rats undergone mesenteric ischemia and reperfusion procedure.


METHODS
Thirty Wistar rats were studied and divided into three groups: Group A, 10 rats undergone mesenteric ischemia (30 minutes) and reperfusion (60 minutes); Group B, 10 rats undergone mesenteric ischemia and reperfusion preceded by ischemic preconditioning for three cycles of ischemia and reperfusion for two minutes each; Group C, 10 rats undergone mesenteric ischemia and reperfusion and, preceding the beginning of reperfusion, ischemic postconditioning was performed for three cycles of reperfusion and ischemia for two minutes each. Then, a segment of small intestine was resected for histological analysis. We assessed the results by Chiu et al. score and the statistical analysis was performed.


RESULTS
According to Chiu et al. score, the means of lesion degree were: In the group A, 3.5; Group B, 1.2; Group C, 1. The difference between group A with the groups B and C was considered statistically significant (P < 0.05).


CONCLUSIONS
Ischemic pre- and postconditioning were capable of minimizing - in a similar intensity - the tissue injury on the intestinal mucosa of rats undergone mesenteric ischemia and reperfusion process.
Dos Santos
Carlos Henrique Marques
CH
Federal University of Mato Grossodo Sul, Campo Grande, MS, Brazil. chenriquems@yahoo.com.br
Pontes
José Carlos Dorsa Vieira
JC
Gomes
Otoni Moreira
OM
Miiji
Luciana Nakao Odashiro
LN
Bispo
Marco Aurélio Feltrin
MA
D000818:Animals; D007082:Ileum / Q000098:blood supply* / Q000473:pathology; D007413:Intestinal Mucosa / Q000098:blood supply* / Q000473:pathology; D019194:Ischemic Preconditioning / Q000009:adverse effects; D008297:Male; D008638:Mesenteric Arteries; D008641:Mesenteric Vascular Occlusion / Q000473:pathology; D023421:Models, Animal; D051381:Rats; D017208:Rats, Wistar; D015427:Reperfusion Injury / Q000473:pathology / Q000517:prevention & control*; D018709:Statistics, Nonparametric