Moderate Hypothermia Provides Better Protection of the Intestinal Barrier Than Deep Hypothermia During Circulatory Arrest in a Piglet Model: A Microdialysis Study

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2016 Sep 30

PMID 27685257

Citations 3

Authors

Mengya Liang

Kangni Feng

Xiao Yang

Guangxian Chen

Zhixian Tang

Weibin Lin

Jian Rong

Zhongkai Wu

Affiliations

Soon will be listed here.

Abstract

Introduction: This study aimed to assess the effects of different temperature settings of hypothermic circulatory arrest (HCA) on intestinal barrier function in a piglet model.

Methods: Twenty Wuzhishan piglets were randomly assigned to 40 min of HCA at 18°C (DHCA group, n = 5), 40 min of HCA at 24°C (MHCA group, n = 5), normothermic cardiopulmonary bypass (CPB group, n = 5) or sham operation (SO group, n = 5). Serum D-lactate (SDL) and lipopolysaccharide (LPS) levels were determined. Microdialysis parameters (glucose, lactate, pyruvate and glycerol) in the intestinal dialysate were measured. After 180 min of reperfusion, intestinal samples were harvested for real-time polymerase chain reaction and western blotting measurements for E-cadherin and Claudin-1.

Results: Higher levels of SDL and LPS were detected in the DHCA group than in the MHCA group (P < 0.001). Both MHCA and DHCA groups exhibited lower glucose levels, higher lactate and glycerol levels and a higher lactate to pyruvate (L/P) ratio compared with the CPB group (p<0.05); the DHCA group had higher lactate and glycerol levels and a higher L/P ratio (p<0.05) but similar glucose levels compared to the MHCA group. No significant differences in E-cadherin mRNA or protein levels were noted. Upregulation of claudin-1 mRNA levels was detected in both the DHCA and MHCA animals' intestines (P < 0.01), but only the DHCA group exhibited a decrease in claudin-1 protein expression (P < 0.01).

Conclusion: HCA altered the energy metabolism and expression of epithelial junctions in the intestine. Moderate hypothermia (24°C) was less detrimental to the markers of normal functioning of the intestinal barrier than deep hypothermia (18°C).

Citing Articles

MicroRNA expression in the hippocampal CA1 region under deep hypothermic circulatory arrest.

Wang X, Yao D, Luan X, Wang Y, Liu H, Liu B Neural Regen Res. 2019; 14(11):2003-2010.

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Deep Hypothermic Circulatory Arrest Does Not Show Better Protection for Vital Organs Compared with Moderate Hypothermic Circulatory Arrest in Pig Model.

Liu Y, Wu Z, Dai L, Li H, Gong M, Lan F Biomed Res Int. 2019; 2019:1420216.

PMID: 31119151 PMC: 6500684. DOI: 10.1155/2019/1420216.

Critical evaluation of colon submucosal microdialysis in awake, mobile rats.

Cibicek N, Ehrmann J, Proskova J, Vecera R PLoS One. 2018; 13(1):e0191041.

PMID: 29324792 PMC: 5764360. DOI: 10.1371/journal.pone.0191041.

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