Blockade of GITR-GITRL interaction maintains Treg function to prolong allograft survival.

Blockade of GITR-GITRL interaction maintains Treg function to prolong allograft survival.
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DOI:
10.1002/eji.200940046
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发表时间:
2010-05
影响因子:
5.4
通讯作者:
Markmann, James F.
Markmann, James F.
中科院分区:
医学3区
文献类型:
--
作者:
Kim, James I.;Sonawane, Samsher B.;Lee, Major K.;Lee, Seoung-Hoon;Duff, Patrick E.;Moore, Daniel J.;O'Connor, Matthew R.;Lian, Moh-Moh;Deng, Shaoping;Choi, Yongwon;Yeh, Heidi;Caton, Andrew J.;Markmann, James F.

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Treg参与移植耐受性已在多种模型中得到证实。在移植物排斥的主动过程中,这些调节细胞自身被调节和失活,这一过程称为反调节。我们假设,在Treg上连接共刺激分子糖皮质激素诱导的TNF受体相关蛋白(GITR)抑制了它们促进移植物存活的能力,并且通过阻断GITR连接可以延长移植物存活。为此,我们设计了一种可溶性GITR融合蛋白(GITR-Fc),其结合GITR配体并抑制GITR的活化。在这里,我们表明GITR-Fc延长了小鼠皮肤移植物的存活,并且这种延长依赖于Treg。在完全MHC不匹配的皮肤移植物环境中,当与MR 1、抗CD 40 L组合使用时,GITR-Fc显著改善了移植物存活,而单独的GITR-Fc没有表现出移植物延长。这些结果表明,破坏GITR与GITR配体的结合可能是延长同种异体移植物存活的重要策略。
Involvement of Treg in transplant tolerance has been demonstrated in multiple models. During the active process of graft rejection, these regulatory cells are themselves regulated and inactivated, a process termed counter-regulation. We hypothesize that ligation of the costimulatory molecule glucocorticoid-induced TNF receptor-related protein (GITR) on Treg inhibits their ability to promote graft survival, and by blocking GITR ligation graft survival can be prolonged. To this aim, we have designed a soluble GITR fusion protein (GITR-Fc), which binds GITR ligand and inhibits activation of GITR. Here, we show that GITR-Fc prolonged mouse skin graft survival, and this prolongation is dependent on Treg. In a full MHC-mismatched skin graft setting, GITR-Fc significantly improved graft survival when used in combination with MR1, anti-CD40L, while GITR-Fc alone did not demonstrate graft prolongation. These results demonstrate that disruption of binding of GITR with GITR ligand may be an important strategy in prolonging allograft survival.
DOI: 10.1097/tp.0b013e31817c11e6
发表时间: 2008-07-15
期刊: Transplantation
影响因子: 6.2
作者:
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通讯作者: Goldman M
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发表时间: 2008-06-01
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发表时间: 2006-07-01
影响因子: 4.4
作者:
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DOI: 10.1196/annals.1381.040
发表时间: 2007-01-01
期刊: AUTOIMMUNITY, PT C
影响因子: --
作者:
Nocentini, Giuseppe;Cuzzocrea, Salvatope;Riccardi, Carlo
通讯作者: Riccardi, Carlo
DOI: 10.1097/01.tp.0000064296.65628.6c
发表时间: 2003-04-27
期刊: TRANSPLANTATION
影响因子: 6.2
作者:
Lee, MK;Huang, XL;Markmann, JF
通讯作者: Markmann, JF