Intraluminal Polyethylene Glycol Stabilizes Tight Junctions and Improves Intestinal Preservation in the Rat

Authors

  • M. Oltean,

    Corresponding author
    1. The Transplant Institute, Sahlgrenska University Hospital, Sweden
    2. Department of Surgery, Institute for Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden
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  • M. Joshi,

    1. Department of Surgery, Institute for Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden
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  • E. Björkman,

    1. Department of Gastrosurgical Research, Institute for Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden
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  • S. Oltean,

    1. The Transplant Institute, Sahlgrenska University Hospital, Sweden
    2. Department of Infectious Diseases, University of Medicine and Pharmacy Cluj-Napoca, Romania
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  • A. Casselbrant,

    1. Department of Gastrosurgical Research, Institute for Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden
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  • G. Herlenius,

    1. The Transplant Institute, Sahlgrenska University Hospital, Sweden
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  • M. Olausson

    1. The Transplant Institute, Sahlgrenska University Hospital, Sweden
    2. Department of Surgery, Institute for Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden
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Mihai Oltean, mihai.oltean@surgery.gu.se

Abstract

Rapidly progressing mucosal breakdown limits the intestinal preservation time below 10 h. Recent studies indicate that intraluminal solutions containing polyethylene glycol (PEG) alleviate preservation injury of intestines stored in UW-Viaspan. We investigated whether a low-sodium PEG solution is beneficial for intestines stored in histidine-tryptophane-ketoglutarate (HTK) preservation solution. Rat intestines used as control tissue (group 1) were perfused with HTK, groups 2 and 3 received either a customized PEG-3350 (group 2) or an electrolyte solution (group 3) intraluminally before cold storage. Tissue injury, brush-border maltase activity, zonula occludens-1 (ZO-1) and claudin-3 expression in the tight junctions (TJ) were analyzed after 8, 14 and 20 h. We measured epithelial resistance and permeability (Ussing chamber) after 8 and 14 h. Group 2 had superior morphology while maltase activity was similar in all groups. TJ proteins rapidly decreased and decolocalized in groups 1 3; these negative events were delayed in group 2, where colocalization persisted for about 14 h. Intestines in group 2 had higher epithelial resistance and lower permeability than the other groups. These results suggest that a customized PEG solution intraluminally reduces the intestinal preservation injury by improving several major epithelial characteristics without negatively affecting the brush-border enzymes or promoting edema.

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