Serveur d'exploration sur les relations entre la France et l'Australie

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Protective Effects of Transgenic Human Endothelial Protein C Receptor Expression in Murine Models of Transplantation

Identifieur interne : 005977 ( Main/Exploration ); précédent : 005976; suivant : 005978

Protective Effects of Transgenic Human Endothelial Protein C Receptor Expression in Murine Models of Transplantation

Auteurs : K. F. E. Lee [Australie] ; B. Lu [Australie] ; J. C. Roussel [France] ; L. J. Murray-Segal [Australie] ; E. J. Salvaris [Australie] ; S. J. Hodgkinson [Australie] ; B. M. Hall [Australie] ; A. J. F. D'Apice [Australie] ; P. J. Cowan [Australie] ; H. Gock [Australie]

Source :

RBID : Pascal:12-0411967

Descripteurs français

English descriptors

Abstract

Thrombosis and inflammation are major obstacles to successful pig-to-human solid organ xenotransplantation. A potential solution is genetic modification of the donor pig to overexpress molecules such as the endothelial protein C receptor (EPCR), which has anticoagulant, anti-inflammatory and cytoprotective signaling properties. Transgenic mice expressing human EPCR (hEPCR) were generated and characterized to test this approach. hEPCR was expressed widely and its compatibility with the mouse protein C pathway was evident from the anticoagulant phenotype of the transgenic mice, which exhibited a prolonged tail bleeding time and resistance to collagen-induced thrombosis. hEPCR mice were protected in a model of warm renal ischemia reperfusion injury compared to wild type (WT) littermates (mean serum creatinine 39.0 ± 2.3 μmol/L vs. 78.5 ± 10.0 μmol/L, p < 0.05; mean injury score 31 ± 7% vs. 56 ± 5%, p < 0.05). Heterotopic cardiac xenografts from hEPCR mice showed a small but significant prolongation of survival in C6-deficient PVG rat recipients compared to WT grafts (median graft survival 6 vs. 5 days, p < 0.05), with less hemorrhage and edema in rejected transgenic grafts. These data indicate that it is possible to overexpress EPCR at a sufficient level to provide protection against transplant-related thrombotic and inflammatory injury, without detrimental effects in the donor animal.


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Le document en format XML

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<sZ>9 aut.</sZ>
<sZ>10 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<placeName>
<settlement type="city">Melbourne</settlement>
<region type="état">Victoria (État)</region>
<settlement type="city">Melbourne</settlement>
</placeName>
<orgName type="university">Université de Melbourne</orgName>
</affiliation>
</author>
</analytic>
<series>
<title level="j" type="main">American journal of transplantation : (Print)</title>
<title level="j" type="abbreviated">Am. j. transplant. : (Print)</title>
<idno type="ISSN">1600-6135</idno>
<imprint>
<date when="2012">2012</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt>
<title level="j" type="main">American journal of transplantation : (Print)</title>
<title level="j" type="abbreviated">Am. j. transplant. : (Print)</title>
<idno type="ISSN">1600-6135</idno>
</seriesStmt>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Animal model</term>
<term>Cold</term>
<term>Endothelial cell protein C receptor</term>
<term>Gene expression</term>
<term>Heart</term>
<term>Heterotransplantation</term>
<term>Homotransplantation</term>
<term>Inflammation</term>
<term>Ischemia</term>
<term>Mouse</term>
<term>Protection</term>
<term>Protective factor</term>
<term>Protein C</term>
<term>Reperfusion</term>
<term>Thrombosis</term>
<term>Transplantation</term>
<term>Treatment</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Homotransplantation</term>
<term>Facteur de protection</term>
<term>Protection</term>
<term>Hétérotransplantation</term>
<term>Protéine C</term>
<term>Expression génique</term>
<term>Ischémie</term>
<term>Modèle animal</term>
<term>Souris</term>
<term>Thrombose</term>
<term>Traitement</term>
<term>Transplantation</term>
<term>Coeur</term>
<term>Inflammation</term>
<term>Reperfusion</term>
<term>Froid</term>
<term>Récepteur EPCR</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Thrombosis and inflammation are major obstacles to successful pig-to-human solid organ xenotransplantation. A potential solution is genetic modification of the donor pig to overexpress molecules such as the endothelial protein C receptor (EPCR), which has anticoagulant, anti-inflammatory and cytoprotective signaling properties. Transgenic mice expressing human EPCR (hEPCR) were generated and characterized to test this approach. hEPCR was expressed widely and its compatibility with the mouse protein C pathway was evident from the anticoagulant phenotype of the transgenic mice, which exhibited a prolonged tail bleeding time and resistance to collagen-induced thrombosis. hEPCR mice were protected in a model of warm renal ischemia reperfusion injury compared to wild type (WT) littermates (mean serum creatinine 39.0 ± 2.3 μmol/L vs. 78.5 ± 10.0 μmol/L, p < 0.05; mean injury score 31 ± 7% vs. 56 ± 5%, p < 0.05). Heterotopic cardiac xenografts from hEPCR mice showed a small but significant prolongation of survival in C6-deficient PVG rat recipients compared to WT grafts (median graft survival 6 vs. 5 days, p < 0.05), with less hemorrhage and edema in rejected transgenic grafts. These data indicate that it is possible to overexpress EPCR at a sufficient level to provide protection against transplant-related thrombotic and inflammatory injury, without detrimental effects in the donor animal.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>France</li>
</country>
<region>
<li>Nouvelle-Galles du Sud</li>
<li>Pays de la Loire</li>
<li>Victoria (État)</li>
</region>
<settlement>
<li>Melbourne</li>
<li>Nantes</li>
<li>Sydney</li>
</settlement>
<orgName>
<li>Université de Melbourne</li>
</orgName>
</list>
<tree>
<country name="Australie">
<region name="Victoria (État)">
<name sortKey="Lee, K F E" sort="Lee, K F E" uniqKey="Lee K" first="K. F. E." last="Lee">K. F. E. Lee</name>
</region>
<name sortKey="Cowan, P J" sort="Cowan, P J" uniqKey="Cowan P" first="P. J." last="Cowan">P. J. Cowan</name>
<name sortKey="Cowan, P J" sort="Cowan, P J" uniqKey="Cowan P" first="P. J." last="Cowan">P. J. Cowan</name>
<name sortKey="D Apice, A J F" sort="D Apice, A J F" uniqKey="D Apice A" first="A. J. F." last="D'Apice">A. J. F. D'Apice</name>
<name sortKey="D Apice, A J F" sort="D Apice, A J F" uniqKey="D Apice A" first="A. J. F." last="D'Apice">A. J. F. D'Apice</name>
<name sortKey="Gock, H" sort="Gock, H" uniqKey="Gock H" first="H." last="Gock">H. Gock</name>
<name sortKey="Gock, H" sort="Gock, H" uniqKey="Gock H" first="H." last="Gock">H. Gock</name>
<name sortKey="Hall, B M" sort="Hall, B M" uniqKey="Hall B" first="B. M." last="Hall">B. M. Hall</name>
<name sortKey="Hodgkinson, S J" sort="Hodgkinson, S J" uniqKey="Hodgkinson S" first="S. J." last="Hodgkinson">S. J. Hodgkinson</name>
<name sortKey="Lee, K F E" sort="Lee, K F E" uniqKey="Lee K" first="K. F. E." last="Lee">K. F. E. Lee</name>
<name sortKey="Lu, B" sort="Lu, B" uniqKey="Lu B" first="B." last="Lu">B. Lu</name>
<name sortKey="Murray Segal, L J" sort="Murray Segal, L J" uniqKey="Murray Segal L" first="L. J." last="Murray-Segal">L. J. Murray-Segal</name>
<name sortKey="Salvaris, E J" sort="Salvaris, E J" uniqKey="Salvaris E" first="E. J." last="Salvaris">E. J. Salvaris</name>
</country>
<country name="France">
<region name="Pays de la Loire">
<name sortKey="Roussel, J C" sort="Roussel, J C" uniqKey="Roussel J" first="J. C." last="Roussel">J. C. Roussel</name>
</region>
</country>
</tree>
</affiliations>
</record>

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