Abstract
Purpose
Midgut volvulus is associated with intestinal ischemia/reperfusion (IR) injury and can progress to severe intestinal damage. Remote ischemic conditioning (RIC) reduces IR-induced injury in distant organs. The aim of this study was to investigate whether RIC protects the intestine from IR injury.
Methods
We investigated intestinal IR injury in 3 weeks old SD rats. Animals underwent: (i) sham laparotomy, (ii) intestinal IR injury, (iii) intestinal IR + RIC during ischemia, or (iv) intestinal IR + RIC after reperfusion. Intestinal IR injury was achieved by 45 min occlusion of superior mesenteric artery followed by de-occlusion. RIC was administered via four cycles of 5 min of hind limb ischemia followed by 5 min reperfusion. Animals were sacrificed 24 h after surgery and the ileum was harvested for evaluation.
Results
Intestinal injury was present after IR. However, this injury was reduced in both IR + RIC groups. Expression of inflammatory cytokine IL6 was lower in IR + RIC groups compared to IR alone. Carbonyl protein was also significantly lower in IR + RIC compared to IR, indicating lower oxidative stress in both IR + RIC groups.
Conclusion
Remote ischemic conditioning attenuated intestinal injury, inflammation, and oxidative stress in experimental intestinal ischemia/reperfusion injury. Remote ischemic conditioning may be useful in children with midgut volvulus to reduce the intestinal injury.
Level of evidence
Experimental study.
Type of study
Animal experiment.
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Acknowledgements
Dr. Agostino Pierro was supported by The Hospital for Sick Children and by the Canadian Institutes of Health Research (CIHR) Foundation Grant (353857).
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Study conception and design: HM, AP. Acquisition of data: HM. Analysis and interpretation of data: HM. Drafting of manuscript: HM, AP. Critical revision of manuscript: YK, SS, CL, BL, NG.
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Miyake, H., Koike, Y., Seo, S. et al. The effect of pre- and post-remote ischemic conditioning reduces the injury associated with intestinal ischemia/reperfusion. Pediatr Surg Int 36, 1437–1442 (2020). https://doi.org/10.1007/s00383-020-04762-5
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DOI: https://doi.org/10.1007/s00383-020-04762-5