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Transplant Tolerance to Pancreatic Islets Is Initiated in the Graft and Sustained in the Spleen

Identifieur interne : 006415 ( Main/Exploration ); précédent : 006414; suivant : 006416

Transplant Tolerance to Pancreatic Islets Is Initiated in the Graft and Sustained in the Spleen

Auteurs : N. Gagliani [Italie] ; T. Jofra [Italie] ; A. Valle [Italie] ; A. Stabilini [Italie] ; C. Morsiani [Italie] ; S. Gregori [Italie] ; S. Deng [États-Unis] ; D. M. Rothstein [États-Unis] ; M. Atkinson [États-Unis] ; M. Kamanaka [États-Unis] ; R. A. Flavell [États-Unis] ; M. G. Roncarolo [Italie] ; M. Battaglia [Italie]

Source :

RBID : Pascal:13-0285793

Descripteurs français

English descriptors

Abstract

The immune system is comprised of several CD4+ T regulatory (Treg) cell types, of which two, the Foxp3+ Treg and T regulatory type 1 (Tr1) cells, have frequently been associated with transplant tolerance. However, whether and how these two Treg-cell types synergize to promote allograft tolerance remains unknown. We previously developed a mouse model of allogeneic transplantation in which a specific immunomodulatory treatment leads to transplant tolerance through both Foxp3+ Treg and Tr1 cells. Here, we show that Foxp3+ Treg cells exert their regulatory function within the allograft and initiate engraftment locally and in a non-antigen (Ag) specific manner. Whereas CD4+CD25- T cells, which contain Tr1 cells, act from the spleen and are key to the maintenance of long-term tolerance. Importantly, the role of Foxp3+ Treg and Tr1 cells is not redundant once they are simultaneously expanded/induced in the same host. Moreover, our data show that long-term tolerance induced by Foxp3+ Treg-cell transfer is sustained by splenic Tr1 cells and functionally moves from the allograft to the spleen.


Affiliations:


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<s3>ITA</s3>
<sZ>1 aut.</sZ>
<sZ>12 aut.</sZ>
</inist:fA14>
<country>Italie</country>
<placeName>
<settlement type="city">Milan</settlement>
<region nuts="2">Lombardie</region>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Battaglia, M" sort="Battaglia, M" uniqKey="Battaglia M" first="M." last="Battaglia">M. Battaglia</name>
<affiliation wicri:level="3">
<inist:fA14 i1="01">
<s1>San Raffaele Scientific Institute, Diabetes Research Institute</s1>
<s2>Milan</s2>
<s3>ITA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
<sZ>13 aut.</sZ>
</inist:fA14>
<country>Italie</country>
<placeName>
<settlement type="city">Milan</settlement>
<region nuts="2">Lombardie</region>
</placeName>
</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="2013">2013</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>Graft</term>
<term>Immune tolerance</term>
<term>Langerhans islet</term>
<term>Spleen</term>
<term>Surgery</term>
<term>T regulatory cell</term>
<term>Transplantation</term>
<term>Treatment</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Greffe</term>
<term>Tolérance immune</term>
<term>Transplantation</term>
<term>Traitement</term>
<term>Ilot Langerhans</term>
<term>Rate</term>
<term>Chirurgie</term>
<term>Lymphocyte T régulateur</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Chirurgie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">The immune system is comprised of several CD4
<sup>+</sup>
T regulatory (Treg) cell types, of which two, the Foxp3
<sup>+</sup>
Treg and T regulatory type 1 (Tr1) cells, have frequently been associated with transplant tolerance. However, whether and how these two Treg-cell types synergize to promote allograft tolerance remains unknown. We previously developed a mouse model of allogeneic transplantation in which a specific immunomodulatory treatment leads to transplant tolerance through both Foxp3
<sup>+</sup>
Treg and Tr1 cells. Here, we show that Foxp3
<sup>+</sup>
Treg cells exert their regulatory function within the allograft and initiate engraftment locally and in a non-antigen (Ag) specific manner. Whereas CD4
<sup>+</sup>
CD25
<sup>-</sup>
T cells, which contain Tr1 cells, act from the spleen and are key to the maintenance of long-term tolerance. Importantly, the role of Foxp3
<sup>+</sup>
Treg and Tr1 cells is not redundant once they are simultaneously expanded/induced in the same host. Moreover, our data show that long-term tolerance induced by Foxp3
<sup>+</sup>
Treg-cell transfer is sustained by splenic Tr1 cells and functionally moves from the allograft to the spleen.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Italie</li>
<li>États-Unis</li>
</country>
<region>
<li>Lombardie</li>
</region>
<settlement>
<li>Milan</li>
</settlement>
</list>
<tree>
<country name="Italie">
<region name="Lombardie">
<name sortKey="Gagliani, N" sort="Gagliani, N" uniqKey="Gagliani N" first="N." last="Gagliani">N. Gagliani</name>
</region>
<name sortKey="Battaglia, M" sort="Battaglia, M" uniqKey="Battaglia M" first="M." last="Battaglia">M. Battaglia</name>
<name sortKey="Gagliani, N" sort="Gagliani, N" uniqKey="Gagliani N" first="N." last="Gagliani">N. Gagliani</name>
<name sortKey="Gagliani, N" sort="Gagliani, N" uniqKey="Gagliani N" first="N." last="Gagliani">N. Gagliani</name>
<name sortKey="Gregori, S" sort="Gregori, S" uniqKey="Gregori S" first="S." last="Gregori">S. Gregori</name>
<name sortKey="Jofra, T" sort="Jofra, T" uniqKey="Jofra T" first="T." last="Jofra">T. Jofra</name>
<name sortKey="Morsiani, C" sort="Morsiani, C" uniqKey="Morsiani C" first="C." last="Morsiani">C. Morsiani</name>
<name sortKey="Roncarolo, M G" sort="Roncarolo, M G" uniqKey="Roncarolo M" first="M. G." last="Roncarolo">M. G. Roncarolo</name>
<name sortKey="Roncarolo, M G" sort="Roncarolo, M G" uniqKey="Roncarolo M" first="M. G." last="Roncarolo">M. G. Roncarolo</name>
<name sortKey="Stabilini, A" sort="Stabilini, A" uniqKey="Stabilini A" first="A." last="Stabilini">A. Stabilini</name>
<name sortKey="Valle, A" sort="Valle, A" uniqKey="Valle A" first="A." last="Valle">A. Valle</name>
</country>
<country name="États-Unis">
<noRegion>
<name sortKey="Deng, S" sort="Deng, S" uniqKey="Deng S" first="S." last="Deng">S. Deng</name>
</noRegion>
<name sortKey="Atkinson, M" sort="Atkinson, M" uniqKey="Atkinson M" first="M." last="Atkinson">M. Atkinson</name>
<name sortKey="Flavell, R A" sort="Flavell, R A" uniqKey="Flavell R" first="R. A." last="Flavell">R. A. Flavell</name>
<name sortKey="Flavell, R A" sort="Flavell, R A" uniqKey="Flavell R" first="R. A." last="Flavell">R. A. Flavell</name>
<name sortKey="Kamanaka, M" sort="Kamanaka, M" uniqKey="Kamanaka M" first="M." last="Kamanaka">M. Kamanaka</name>
<name sortKey="Rothstein, D M" sort="Rothstein, D M" uniqKey="Rothstein D" first="D. M." last="Rothstein">D. M. Rothstein</name>
</country>
</tree>
</affiliations>
</record>

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