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  TCRs with segment TRAV9-2 or a CDR3 histidine are overrepresented among nickel-specific CD4+ T cells

Aparicio-Soto, M., Riedel, F., Leddermann, M., Bacher, P., Scheffold, A., Kuhl, H., et al. (2020). TCRs with segment TRAV9-2 or a CDR3 histidine are overrepresented among nickel-specific CD4+ T cells. Allergy, 75(10), 2574-2586. doi:10.1111/all.14322.

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Aparicio-Soto_2020.pdf
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© 2020 The Authors. Allergy published by John Wiley & Sons Ltd.

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 Creators:
Aparicio-Soto, Marina , Author
Riedel, Franziska , Author
Leddermann, Melanie , Author
Bacher, Petra, Author
Scheffold, Alexander , Author
Kuhl, Heiner1, Author           
Timmermann, Bernd1, Author           
Chudakov, Dmitriy M. , Author
Molin, Sonja, Author
Worm, Margitta , Author
Heine, Guido, Author
Thierse, Hermann-Josef , Author
Luch, Andreas, Author
Siewert, Katherina , Author
Affiliations:
1Sequencing (Head: Bernd Timmermann), Scientific Service (Head: Christoph Krukenkamp), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479670              

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Free keywords: CD154 upregulation assay; CDR3 histidine; TCR α-chain segment TRAV9-2; human allergic contact dermatitis; nickel-specific CD4+ T cells
 Abstract:
Background: Nickel is the most frequent cause of T cell-mediated allergic contact dermatitis worldwide. In vitro, CD4+ T cells from all donors respond to nickel but the involved αβ T cell receptor (TCR) repertoire has not been comprehensively analyzed.

Methods: We introduce CD154 (CD40L) upregulation as a fast, unbiased, and quantitative method to detect nickel-specific CD4+ T cells ex vivo in blood of clinically characterized allergic and non allergic donors. Naïve (CCR7+ CD45RA+) and memory (not naïve) CD154+ CD4+ T cells were analyzed by flow cytometry after 5 hours of stimulation with 200 µmol/L NiSO4 ., TCR α- and β-chains of sorted nickel-specific and control cells were studied by high-throughput sequencing.

Results: Stimulation of PBMCs with NiSO4 induced CD154 expression on ~0.1% (mean) of naïve and memory CD4+ T cells. In allergic donors with recent positive patch test, memory frequencies further increased ~13-fold and were associated with markers of in vivo activation. CD154 expression was TCR-mediated since single clones could be specifically restimulated. Among nickel-specific CD4+ T cells of allergic and non allergic donors, TCRs expressing the α-chain segment TRAV9-2 or a histidine in their α- or β-chain complementarity determining region 3 (CDR3) were highly overrepresented.

Conclusions: Induced CD154 expression represents a reliable method to study nickel-specific CD4+ T cells. TCRs with particular features respond in all donors, while strongly increased blood frequencies indicate nickel allergy for some donors. Our approach may be extended to other contact allergens for the further development of diagnostic and predictive in vitro tests.

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Language(s): eng - English
 Dates: 2020-03-312020-05-132020-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1111/all.14322
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Title: Allergy
Source Genre: Journal
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Publ. Info: Hoboken, USA : Wiley
Pages: 13 Volume / Issue: 75 (10) Sequence Number: - Start / End Page: 2574 - 2586 Identifier: ISSN: 0105-4538
CoNE: https://pure.mpg.de/cone/journals/resource/110976549881407