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
中科院分区:
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
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.
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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:
--
作者:
Sallusto F;Cella M;Danieli C;Lanzavecchia A
通讯作者:
Lanzavecchia A
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
影响因子:
5.4
作者:
Norbury, CC;Chambers, BJ;Watts, C
通讯作者:
Watts, C