A critical role for protein kinase C-theta-mediated T cell survival in cardiac allograft rejection.
A critical role for protein kinase C-theta-mediated T cell survival in cardiac allograft rejection.
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DOI:
10.4049/jimmunol.181.1.513
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发表时间:
2008-07-01
影响因子:
4.4
通讯作者:
Sun, Zuoming
中科院分区:
文献类型:
--
作者:
Manicassamy, Santhakumar;Yin, Dengping;Zhang, Zheng;Molinero, Luciana L.;Alegre, Marisa-Luisa;Sun, Zuoming
Protein kinase C (PKC)-θ mediates the critical TCR signals required for T cell activation. Previously, we have shown that in response to TCR stimulation, PKC-θ−/− T cells undergo apoptosis due to greatly reduced levels of the anti-apoptotic molecule, Bcl-xL. In this study, we demonstrate that PKC-θ-regulated expression of Bcl-xL is essential for T cell-mediated cardiac allograft rejection. Rag1−/− mice reconstituted with wild-type T cells readily rejected fully mismatched cardiac allografts, whereas Rag1−/− mice reconstituted with PKC-θ −/− T cells failed to promote rejection. Transgenic expression of Bcl-xL in PKC-θ −/− T cells was sufficient to restore cardiac allograft rejection, suggesting that PKC-θ-regulated survival is required for T cell-mediated cardiac allograft rejection in this adoptive transfer model. In contrast to adoptive transfer experiments, intact PKC-θ −/− mice displayed delayed, but successful cardiac allograft rejection, suggesting the potential compensation for PKC-θ function. Finally, a subtherapeutic dose of anti-CD154 Ab or CTLA4-Ig, which was not sufficient to prevent cardiac allograft rejection in the wild-type mice, prevented heart rejection in the PKC-θ −/− mice. Thus, in combination with other treatments, inhibition of PKC-θ may facilitate achieving long-term survival of allografts.
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DOI:
10.1073/pnas.88.15.6682
发表时间:
1991-08-01
影响因子:
11.1
作者:
BLACKMAN, MA;EINKEL, TH;MARRACK, P
通讯作者:
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影响因子:
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DOI:
10.1084/jem.184.2.741
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期刊:
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影响因子:
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作者:
通讯作者:
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作者:
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通讯作者:
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影响因子:
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