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Effect of 100% oxygen on E-selectin expression, recruitment of neutrophils and enterocyte apoptosis following intestinal ischemia-reperfusion in a rat

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Abstract

Recent evidence suggests that neutrophil recruitment may initiate cell apoptosis in ischemic tissues. We have recently shown that enterocyte apoptosis is increased following intestinal ischemia-reperfusion (IR) injury. The purpose of the present study was to examine the effect of hyperoxia on E-selectin expression, neutrophil recruitment and enterocyte apoptosis following intestinal IR in a rat. Male Sprague-Dawley rats were divided into three experimental groups: (1) sham rats underwent laparotomy without vascular occlusion and were ventilated with air (Sham) (2) IR rats underwent occlusion of both the superior mesenteric artery and portal vein for 30 min and were ventilated with air (IR), and (3) IR-O2 rats underwent IR and were ventilated with 100% started 10 min before reperfusion and continued for 6 h (IR-O2). Intestinal structural changes were determined 24 h following IR. Immunohistochemistry for E-selectin (using E-selectin cleaved concentrated polyclonal antibody) was performed to identify E-selectin immunoreactivity localized to the endothelium of venules. The recruitment of neutrophils was calculated per 100 venules. Immunohistochemistry for Caspase-3 was performed for identification of apoptotic cells. Non-parametric one-way ANOVA test was used for statistical analysis with p less than 0.05 considered statistically significant. A significant increase in E-selectin expression in the jejunum (6.1 ± 2.2 vs. 2.5 ± 1.0 E-selectin positive vessels/100 vessels, p < 0.05) and ileum (12.1 ± 2.7 vs. 3.3 ± 1.2 E-selectin positive vessels/100 vessels, p < 0.05) and a concomitant increase in neutrophil recruitment in the ileum (5.5 ± 1.6 vs. 1.3 ± 0.6 adhered PMN’s per 100 venules) were observed in IR rats compared to sham animals and were accompanied by increased cell apoptosis (p < 0.05). Treatment with 100% oxygen resulted in a significant attenuation in E-selectin expression in the ileum (2.7 ± 1.1 vs. 12.1 ± 2.7 E-selectin positive vessels/100 vessels, p < 0.05), and neutrophil recruitment in the jejunum (2.5 ± 1.4 vs. 7.7 ± 1.9 adhered PMN’s per 100 venules, p < 0.05) and ileum (1.5 ± 0.7 vs. 5.5 ± 1.6 adhered PMN’s per 100 venules, p < 0.05) compared to IR animals, and was accompanied by decreased cell apoptosis (p < 0.05). Hyperoxia inhibits enterocyte apoptosis following intestinal ischemia-reperfusion. Down-regulation of E-selectin expression with subsequent decrease in neutrophil recruitment may be responsible for this effect.

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Authors and Affiliations

  1. Department of Pediatric Surgery, Bnai Zion Medical Center, The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, 47 Golomb St, P.O.B. 4940, Haifa, 31048, Israel

    Igor Sukhotnik, Robert Greenblatt & Jorge Mogilner

  2. Pediatric Gastroenterology, Bnai Zion Medical Center, The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel

    Ron Shaoul

  3. Ischemia-Shock Research Laboratory, Department of Medicine, Carmel Medical Center, The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel

    Vera Brod, Eitan Shiloni & Haim Bitterman

  4. Section of Pediatric Surgery, Mott Children’s Hospital, University of Michigan, Ann Arbor, MI, USA

    Arnold G. Coran

Authors
  1. Igor Sukhotnik
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  2. Arnold G. Coran
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  3. Robert Greenblatt
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  4. Vera Brod
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  5. Jorge Mogilner
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  6. Eitan Shiloni
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  7. Ron Shaoul
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  8. Haim Bitterman
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Correspondence to Igor Sukhotnik.

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Sukhotnik, I., Coran, A.G., Greenblatt, R. et al. Effect of 100% oxygen on E-selectin expression, recruitment of neutrophils and enterocyte apoptosis following intestinal ischemia-reperfusion in a rat. Pediatr Surg Int 24, 29–35 (2008). https://doi.org/10.1007/s00383-007-2039-y

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  • DOI: https://doi.org/10.1007/s00383-007-2039-y

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