Effect of dexmedetomidine on expression of PARP-1 during intestinal ischemia-reperfusion injury in rats
10.3760/cma.j.cn131073.20231127.00619
- VernacularTitle:右美托咪定对大鼠肠缺血再灌注损伤时PARP-1表达的影响
- Author:
Lipeng LIU
1
;
Kun LIU
;
Lian XUE
;
Xuefei WANG
;
Qiang LIU
Author Information
1. 商丘市第一人民医院疼痛科，商丘 476100
- Keywords:
Dexmedetomidine;
Intestines;
Reperfusion injury;
Poly(ADP-ribose) polymerases
- From:
Chinese Journal of Anesthesiology
2024;44(6):738-741
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of dexmedetomidine on the expression of polyadenosine diphosphate ribose polymerase-1 (PARP-1) during intestinal ischemia-reperfusion (I/R) injury in rats.Methods:Eighteen clean-grade healthy male Sprague-Dawley rats, weighing 200-240 g, aged 8-12 weeks, were divided into 3 groups ( n=6 each) using a random number table method: sham operation group (S group), intestinal I/R group (I/R group) and intestinal I/R+ dexmedetomidine group (I/R+ Dex group). In group S, only the superior mesenteric artery was isolated by laparotomy without clipping. The model of intestinal I/R injury was established by clamping the superior mesenteric artery for 45 min followed by reperfusion for 120 min in anesthetized animals in I/R group and I/R+ Dex group. The right femoral vein was isolated and catheterized in all the three groups. In I/R+ DEX group, dexmedetomidine 5 μg/kg was intravenously infused for 15 min before clamping. The equal volume of normal saline was given in S group and I/R group. At 120 min of reperfusion, the rats were sacrificed after anesthesia and the small intestine tissues were taken for determination of the wet/dry lung weight (W/D) ratio, apoptosis in intestinal epithelial cells (using TUNEL method) and expression of PARP-1 activation product polyadenosine diphosphate ribose and caspase-3 (by Western blot) and for microscopic examination of pathological changes which were assessed and scored according to Chiu. The apoptosis index was calculated. Results:Compared with S group, the W/D ratio, Chiu score and apoptosis index were significantly increased, and the expression of polyadenosine diphosphate ribose and caspase-3 was up-regulated in I/R group and I/R+ Dex group ( P<0.05). Compared with I/R group, the W/D ratio, Chiu score and apoptosis index were significantly decreased, and the expression of PAR and caspase-3 was down-regulated in I/R+ Dex group ( P<0.05). Conclusions:The mechanism by which dexmedetomidine alleviates intestinal I/R injury may be related to inhibiting PARP-1 activation and alleviating cell apoptosis in rats.
