Protein tyrosine phosphatase PTPN22 is dispensable for dendritic cell antigen processing and promotion of T-cell activation by dendritic cells.

Protein tyrosine phosphatase PTPN22 is dispensable for dendritic cell antigen processing and promotion of T-cell activation by dendritic cells.
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DOI:
10.1371/journal.pone.0186625
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发表时间:
2017
期刊:
影响因子:
3.7
通讯作者:
Purvis HA
Purvis HA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Clarke F;Jordan CK;Gutiérrez-Martinez E;Bibby JA;Sanchez-Blanco C;Cornish GH;Dai X;Rawlings DJ;Zamoyska R;Guermonprez P;Cope AP;Purvis HA

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PTPN22R620W单核苷酸多态性会增加患多种自身免疫性疾病的风险,包括1型糖尿病、类风湿性关节炎和狼疮。 PTPN22 在抗原呈递细胞 (APC) 中高度表达,据报道,其中鼠科疾病相关变异直系同源物 (Ptpn22R619W) 的表达会失调树突状细胞 (DC) 中的模式识别受体信号传导并促进 T 细胞增殖。由于 T 细胞激活依赖于 DC 抗原的摄取、降解和呈递,因此我们分析了来自野生型 (WT)、Ptpn22-/- 或 Ptpn22R619W 突变小鼠的脾和 GM-CSF 骨髓来源的 DC 中这些功能的效率。结果表明,DC 通过巨胞饮作用或受体介导的内吞作用摄取抗原的能力没有差异。抗原降解和呈递也相同,WT T 细胞缀合物形成和随后的 T 细胞增殖也是相同的。尽管我们研究的抗原摄取、加工和呈递途径中可能存在多种磷酸酶调节途径,但我们观察到 Ptpn22 和 R619W 自身免疫相关变体是可有可无的。这些重要的发现表明,在非炎症条件下,DC 依赖性抗原摄取和 T 细胞激活不需要 Ptpn22。我们的研究结果表明,抗原摄取和加工(决定适应性免疫反应的基本途径)的扰动不太可能为与 Ptpn22 自身免疫相关多态性相关的风险提供机制。
The PTPN22R620W single nucleotide polymorphism increases the risk of developing multiple autoimmune diseases including type 1 diabetes, rheumatoid arthritis and lupus. PTPN22 is highly expressed in antigen presenting cells (APCs) where the expression of the murine disease associated variant orthologue (Ptpn22R619W) is reported to dysregulate pattern recognition receptor signalling in dendritic cells (DCs) and promote T-cell proliferation. Because T-cell activation is dependent on DC antigen uptake, degradation and presentation, we analysed the efficiency of these functions in splenic and GM-CSF bone marrow derived DC from wild type (WT), Ptpn22-/- or Ptpn22R619W mutant mice. Results indicated no differential ability of DCs to uptake antigen via macropinocytosis or receptor-mediated endocytosis. Antigen degradation and presentation was also equal as was WT T-cell conjugate formation and subsequent T-cell proliferation. Despite the likely presence of multiple phosphatase-regulated pathways in the antigen uptake, processing and presentation pathways that we investigated, we observed that Ptpn22 and the R619W autoimmune associated variant were dispensable. These important findings indicate that under non-inflammatory conditions there is no requirement for Ptpn22 in DC dependent antigen uptake and T-cell activation. Our findings reveal that perturbations in antigen uptake and processing, a fundamental pathway determining adaptive immune responses, are unlikely to provide a mechanism for the risk associated with the Ptpn22 autoimmune associated polymorphism.
DOI: 10.1038/nrm3565
发表时间: 2013-05
期刊: Nature reviews. Molecular cell biology
影响因子: --
作者:
通讯作者: --
DOI: 10.1007/978-1-60761-421-0_25
发表时间: 2010-01-01
期刊: DENDRITIC CELL PROTOCOLS, SECOND EDITION
影响因子: --
作者:
Savina, Ariel;Vargas, Pablo;Amigorena, Sebastian
通讯作者: Amigorena, Sebastian
DOI: 10.1084/jem.182.2.389
发表时间: 1995-08-01
期刊: The Journal of experimental medicine
影响因子: --
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Sallusto F;Cella M;Danieli C;Lanzavecchia A
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DOI: 10.1073/pnas.0910609107
发表时间: 2010-03-02
影响因子: 11.1
作者:
Platt, Craig D.;Ma, Jessica K.;Delamarre, Lelia
通讯作者: Delamarre, Lelia
DOI: 10.1002/eji.1830270141
发表时间: 1997-01-01
影响因子: 5.4
作者:
Norbury, CC;Chambers, BJ;Watts, C
通讯作者: Watts, C