TY - JOUR
T1 - Protective effects of ascorbic acid pretreatment in a rat model of intestinal ischemia-reperfusion injury
T2 - A histomorphometric study
AU - Higa, Oscar Haruo
AU - Parra, Edwin Roger
AU - Ab'Saber, Alexandre Muxfeldt
AU - Farhat, Cecilia
AU - Higa, Rita
AU - Capelozzi, Vera Luiza
PY - 2007
Y1 - 2007
N2 - BACKGROUND:. Ascorbic acid has shown promise in attenuation of intestinal ischemia-reperfusion (I/R) injury. The aim of this study was to determine the protective effects of ascorbic acid on intestinal morphology during IR injury in rats. MATERIALS AND METHODS:. We examined morphological changes in the small intestine of Wistar rats after (i) 40 minutes of ischemia (I), (ii) ischemia followed by 30 min of reperfusion (IR), (iii) ischemia with ascorbic acid (IA), (iv) ischemia followed by reperfusion and ascorbic acid (IRA) and (v) in a sham group (S). We used morphometry to evaluate the amount of villous architecture, crypts, necrosis, hemorrhagic infarcts and inflammatory cells at the mesenteric and antimesenteric borders of the small intestine. RESULTS: Ascorbic acid caused a significant reduction of antimesenteric villous hemorrhagic infarction (p<0.05) of the small intestine after ischemia followed by reperfusion as well as villous necrosis reduction at both borders after ischemia (p<0.05). The lesions found in the small intestine were more prominent along the antimesenteric margin. CONCLUSIONS: Ascorbic acid pretreatment has a protective effect against the intestinal morphological lesions induced by ischemia-reperfusion injury in rats.
AB - BACKGROUND:. Ascorbic acid has shown promise in attenuation of intestinal ischemia-reperfusion (I/R) injury. The aim of this study was to determine the protective effects of ascorbic acid on intestinal morphology during IR injury in rats. MATERIALS AND METHODS:. We examined morphological changes in the small intestine of Wistar rats after (i) 40 minutes of ischemia (I), (ii) ischemia followed by 30 min of reperfusion (IR), (iii) ischemia with ascorbic acid (IA), (iv) ischemia followed by reperfusion and ascorbic acid (IRA) and (v) in a sham group (S). We used morphometry to evaluate the amount of villous architecture, crypts, necrosis, hemorrhagic infarcts and inflammatory cells at the mesenteric and antimesenteric borders of the small intestine. RESULTS: Ascorbic acid caused a significant reduction of antimesenteric villous hemorrhagic infarction (p<0.05) of the small intestine after ischemia followed by reperfusion as well as villous necrosis reduction at both borders after ischemia (p<0.05). The lesions found in the small intestine were more prominent along the antimesenteric margin. CONCLUSIONS: Ascorbic acid pretreatment has a protective effect against the intestinal morphological lesions induced by ischemia-reperfusion injury in rats.
KW - Ascorbic acid
KW - Ischemia
KW - Ischemia-reperfusion
KW - Morphometric analysis
KW - Small intestine
UR - http://www.scopus.com/inward/record.url?scp=34347214812&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34347214812&partnerID=8YFLogxK
U2 - 10.1590/S1807-59322007000300017
DO - 10.1590/S1807-59322007000300017
M3 - Article
C2 - 17589673
AN - SCOPUS:34347214812
SN - 1807-5932
VL - 62
SP - 315
EP - 320
JO - Clinics
JF - Clinics
IS - 3
ER -