The autoimmune-predisposing variant of lymphoid tyrosine phosphatase favors T helper 1 responses.
The autoimmune-predisposing variant of lymphoid tyrosine phosphatase favors T helper 1 responses.
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DOI:
10.1016/j.humimm.2012.12.017
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发表时间:
2013-05
期刊:
影响因子:
2.7
通讯作者:
Lie, Benedicte A.
中科院分区:
文献类型:
--
作者:
Vang, Torkel;Landskron, Johannes;Viken, Marte K.;Oberprieler, Nikolaus;Torgersen, Knut M.;Mustelin, Tomas;Tasken, Kjetil;Tautz, Lutz;Rickert, Robert C.;Lie, Benedicte A.
The C1858T single nucleotide polymorphism in PTPN22, which is the gene encoding lymphoid tyrosine phosphatase (LYP), confers increased risk for various autoimmune disorders in Caucasians. Although the disease-associated LYP allele (LYP*W620) is a gain-of-function variant that has higher catalytic activity than the major allele (LYP*R620), it is still unclear how LYP*W620 predisposes for autoimmunity. Here, we compared both T cell signaling and T cell function in healthy human donors homozygous for either LYP*R620 or LYP*W620. Generally, the presence of LYP*W620 caused reduced proximal T cell antigen receptor-mediated signaling (e.g. ζ chain phosphorylation) but augmented CD28-associated signaling (e.g. AKT activation). Altered ligand binding properties of the two LYP variants could explain these findings since LYP*R620 interacted more strongly with the p85 subunit of PI3K. Variation in signaling between cells expressing either LYP*R620 or LYP*W620 also affected the differentiation of conventional CD4+ T cells. For example, LYP*W620 homozygous donors displayed exaggerated Th1 responses (e.g. IFNγ production) and reduced Th17 responses (e.g. IL-17 production). Importantly, while regulatory T cells normally suppressed Th1-mediated IFNγ production in LYP*R620 homozygous individuals, such suppression was lost in LYP*W620 homozygous individuals. Altogether, these findings provide a molecular and cellular explanation for the autoimmune phenotype associated with LYP*W620.
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DOI:
10.1084/jem.193.4.497
发表时间:
2001-02-19
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Vang T;Torgersen KM;Sundvold V;Saxena M;Levy FO;Skålhegg BS;Hansson V;Mustelin T;Taskén K
通讯作者:
Taskén K
影响因子:
30.8
作者:
Vang, T;Congia, M;Bottini, N
通讯作者:
Bottini, N
影响因子:
2.7
作者:
Gomez, Luis M.;Anaya, Juan-Manuel;Martin, Javier
通讯作者:
Martin, Javier
影响因子:
14.8
作者:
Vang, Torkel;Liu, Wallace H.;Delacroix, Laurence;Wu, Shuangding;Vasile, Stefan;Dahl, Russell;Yang, Li;Musumeci, Lucia;Francis, Dana;Landskron, Johannes;Tasken, Kjetil;Tremblay, Michel L.;Lie, Benedicte A.;Page, Rebecca;Mustelin, Tomas;Rahmouni, Souad;Rickert, Robert C.;Tautz, Lutz
通讯作者:
Tautz, Lutz
DOI:
10.4049/jimmunol.0713370
发表时间:
2009-03-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Arechiga AF;Habib T;He Y;Zhang X;Zhang ZY;Funk A;Buckner JH
通讯作者:
Buckner JH