Control of Leishmania major in the absence of Tyk2 kinase
Control of Leishmania major in the absence of Tyk2 kinase
复制标题
在没有 Tyk2 激酶的情况下控制重大利什曼原虫
DOI:
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复制
发表时间:
2004
影响因子:
5.4
通讯作者:
C. Bogdan
中科院分区:
文献类型:
--
作者:
U. Schleicher;J. Mattner;M. Blos;H. Schindler;M. Röllinghoff;Marina Karaghiosoff;Mathias Müller;G. Werner;C. Bogdan
IL‐12 is indispensable for the control of many intracellular pathogens, but the components of the signaling pathway that are essential for its function in vivo are incompletely understood. Here, we investigated in the Leishmania major mouse model whether Tyk2 kinase is required for the generation of a protective immune response. Unlike C57BL/6 controls, Tyk2–/–mice developed severe skin lesions after infection that frequently ulcerated, but ultimately healed. NK cell cytotoxicity was absent in infected Tyk2–/– mice, even after IL‐12 pretreatment, which correlated with a STAT4 activation defect. IFN‐α / β, which was still able to activate STAT1 in Tyk2–/– NK cells, reconstituted their cytotoxic activity, but not their IL‐12responsiveness. The IL‐12‐induced production of IFN‐γ by NK cells and CD8+ T cells was strongly suppressed in Tyk2–/– mice at day 1 of infection, but partly regained during the late phase of infection. Tyk2–/– CD4+ T cells developed into Th1 cells (although in a delayed fashion) and infected Tyk2–/– mice expressed normals levels of inducible NO synthase. Thus, Tyk2 is required for the IL‐12 response of NK cells and CD8+ T cells in L. major‐infected mice, but not for the generation of Th1 cells and the ultimate control of the disease.
DOI:
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发表时间:
1999
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Satoskar,AR;Stamm,LM;Zhang,X;Satoskar,AA;Okano,M;Terhorst,C;David,JR;Wang,B
通讯作者:
Wang,B
DOI:
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发表时间:
1993
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Wang,ZE;Reiner,SL;Hatam,F;Heinzel,FP;Bouvier,J;Turck,CW;Locksley,RM
通讯作者:
Locksley,RM