Document Detail


Effect of a novel solution for organ preservation on equine large colon in an isolated pulsatile perfusion system.
MedLine Citation:
PMID:  18356130     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
REASONS FOR PERFORMING STUDY: Several therapeutic agents have been tested in models of ischaemia and reperfusion injury (IRI) in equine jejunum, with mixed results. This study was based on the use of an organ perfusion solution (OPS) designed to protect human allografts from IRI. HYPOTHESIS: A modified OPS can preserve the integrity of equine large colon during 12 h of isolated pulsatile perfusion, in the absence of oxygen and blood. METHODS: Segments of large colon were removed from anaesthetised horses, the contents removed and the mucosa rinsed with 0.9% saline. Experimental segments were perfused for 12 h with one litre modified OPS (n = 7) delivered by pulsatile flow through an extracorporeal circuit. Control segments (n = 4) were perfused on the same circuit with one litre of autologous blood. Vascular resistance, flow and pressure were measured serially, and aliquots of OPS and blood drawn hourly for routine biochemical analyses. Mucosal biopsies of the experimental and control segments were taken at 0, 6 and 12 h and in vivo mucosal tissue at 0 h for baseline comparison. All biopsies underwent histomorphometric analysis and immunohistochemical assessment of calprotectin activity. RESULTS: All colon segments were machine perfused without technical complications. Vascular and biochemical indices remained constant over 12 h in the OPS group, and were constant over 6 h in the control group, but deteriorated later. Mucosal integrity, expression of cyclooxygenases-1 and -2, and expression of mucosal calprotectin were unchanged in the OPS group compared with the baseline tissues, and mucosal integrity was superior to the control tissues. CONCLUSIONS: A modified OPS designed to target specific pathways of damage from IRI can preserve colonic mucosal integrity for 12 h in the absence of blood and oxygen.
Authors:
M M R Polyak; A J Morton; A Grosche; S Matyjaszek; D E Freeman
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Equine veterinary journal     Volume:  40     ISSN:  0425-1644     ISO Abbreviation:  Equine Vet. J.     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-08-01     Completed Date:  2008-10-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  306-12     Citation Subset:  IM    
Affiliation:
Island Whirl Equine Colic Research Laboratory, Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Flow Velocity / veterinary
Colon / blood supply,  drug effects*,  pathology
Extracorporeal Circulation / veterinary
Female
Horse Diseases / pathology,  prevention & control*
Horses
Immunohistochemistry / veterinary
Intestinal Mucosa / drug effects,  pathology
Leukocyte L1 Antigen Complex / metabolism*
Male
Organ Preservation Solutions / pharmacology*
Reperfusion Injury / prevention & control,  veterinary*
Time Factors
Chemical
Reg. No./Substance:
0/Leukocyte L1 Antigen Complex; 0/Organ Preservation Solutions

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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