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Integrin Activation Enables Sensitive Detection of Functional CD4+ and CD8+ T Cells: Application to Characterize SARS-CoV-2 Immunity

Anna Schöllhorn, Juliane Schuhmacher, Luciana Besedovsky, Rolf Fendel, Anja T.R. Jensen, Stefan Stevanović, Tanja Lange, Hans Georg Rammensee, Jan Born, Cécile Gouttefangeas*, Stoyan Dimitrov

*Korrespondierende/r Autor/-in für diese Arbeit

Abstract

We have previously shown that conformational change in the β2-integrin is a very early activation marker that can be detected with fluorescent multimers of its ligand intercellular adhesion molecule (ICAM)-1 for rapid assessment of antigen-specific CD8+ T cells. In this study, we describe a modified protocol of this assay for sensitive detection of functional antigen-specific CD4+ T cells using a monoclonal antibody (clone m24 Ab) specific for the open, high-affinity conformation of the β2-integrin. The kinetics of β2-integrin activation was different on CD4+ and CD8+ T cells (several hours vs. few minutes, respectively); however, m24 Ab readily stained both cell types 4–6 h after antigen stimulation. With this protocol, we were able to monitor ex vivo effector and memory CD4+ and CD8+ T cells specific for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), cytomegalovirus (CMV), Epstein–Barr virus (EBV), and hepatitis B virus (HBV) in whole blood or cryopreserved peripheral blood mononuclear cells (PBMCs) of infected or vaccinated individuals. By costaining β2-integrin with m24 and CD154 Abs, we assessed extremely low frequencies of polyfunctional CD4+ T cell responses. The novel assay used in this study allows very sensitive and simultaneous screening of both CD4+ and CD8+ T cell reactivities, with versatile applicability in clinical and vaccination studies.

OriginalspracheEnglisch
Aufsatznummer626308
ZeitschriftFrontiers in Immunology
Jahrgang12
Seiten (von - bis)626308
ISSN1664-3224
DOIs
PublikationsstatusVeröffentlicht - 29.03.2021

Fördermittel

We thank S. Heidu for the production of HLA-class I tetramers and excellent technical assistance. The HLA-class II (DRB*11/CMV HPT) multimer was kindly provided by the NIH Tetramer Core Facility. The MR1 tetramer technology was developed jointly by Dr. James McCluskey, Dr. Jamie Rossjohn, and Dr. David Fairlie, and the material was produced by the NIH Tetramer Core Facility as permitted to be distributed by the University of Melbourne. We acknowledge the support of the Open Access Publishing Fund of the University of T?bingen. We have shared a preprint of this manuscript on Research Square [Sch?llhorn et al., (20 )]. Funding. CG, AS, and H-GR were supported by the Deutsche Forschungsgemeinschaft, Collaborative Research Center 1399. CG, SS, and H-GR received support from the Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy?EXC 2180?390900677 [CG, SS, and H-GR sind gef?rdert durch die Deutsche Forschungsgemeinschaft (DFG) im Rahmen der Exzellenzstrategie des Bundes und der L?nder - EXC 2180 ? 390900677]. LB, TL, JB, and SD were supported by grants from the Deutsche Forschungsgemeinschaft (TR-SFB 654, Plasticity and Sleep).

UN SDGs

Dieser Output leistet einen Beitrag zu folgendem(n) Ziel(en) für nachhaltige Entwicklung

  1. SDG 3 – Gesundheit und Wohlergehen
    SDG 3 – Gesundheit und Wohlergehen

Strategische Forschungsbereiche und Zentren

  • Forschungsschwerpunkt: Gehirn, Hormone, Verhalten - Center for Brain, Behavior and Metabolism (CBBM)

Coronavirus-Bezug

  • Forschung zu SARS-CoV-2 / COVID-19

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