Evaluation of novel Epstein-Barr virus-derived antigen formulations for monitoring virus-specific T cells in pediatric patients with infectious mononucleosis.


Journal

Virology journal
ISSN: 1743-422X
Titre abrégé: Virol J
Pays: England
ID NLM: 101231645

Informations de publication

Date de publication:
14 Jun 2024
Historique:
received: 19 07 2023
accepted: 06 06 2024
medline: 15 6 2024
pubmed: 15 6 2024
entrez: 14 6 2024
Statut: epublish

Résumé

Infection with the Epstein-Barr virus (EBV) elicits a complex T-cell response against a broad range of viral proteins. Hence, identifying potential differences in the cellular immune response of patients with different EBV-associated diseases or different courses of the same disorder requires interrogation of a maximum number of EBV antigens. Here, we tested three novel EBV-derived antigen formulations for their ability to reactivate virus-specific T cells ex vivo in patients with EBV-associated infectious mononucleosis (IM). We comparatively analyzed EBV-specific CD4+ and CD8+ T-cell responses to three EBV-derived antigen formulations in 20 pediatric patients during the early phase of IM: T-activated EBV proteins (BZLF1, EBNA3A) and EBV-like particles (EB-VLP), both able to induce CD4+ and CD8+ T-cell responses ex vivo, as well as an EBV-derived peptide pool (PP) covering 94 well-characterized CD8+ T-cell epitopes. We assessed the specificity, magnitude, kinetics, and functional characteristics of EBV-specific immune responses at two sequential time points (v1 and v2) within the first six weeks after IM symptom onset (T All three tested EBV-derived antigen formulations enabled the detection of EBV-reactive T cells during the early phase of IM without prior T-cell expansion in vitro. EBV-reactive CD4+ and CD8+ T cells were mainly mono-functional (CD4+: mean 64.92%, range 56.15-71.71%; CD8+: mean 58.55%, range 11.79-85.22%) within the first two weeks after symptom onset (v1) with IFN-γ and TNF-secreting cells representing the majority of mono-functional EBV-reactive T cells. By contrast, PP-reactive CD8+ T cells were primarily bi-functional (>60% at v1 and v2), produced IFN-γ and TNF and had more tri-functional than mono-functional components. We observed a moderate correlation between viral load and EBNA3A, EB-VLP, and PP-reactive CD8+ T cells (r All three EBV-derived antigen formulations represent innovative and generic recall antigens suitable for monitoring EBV-specific T-cell responses ex vivo. Their combined use facilitates a thorough analysis of EBV-specific T-cell immunity and allows the identification of functional T-cell signatures linked to disease development and severity.

Sections du résumé

BACKGROUND BACKGROUND
Infection with the Epstein-Barr virus (EBV) elicits a complex T-cell response against a broad range of viral proteins. Hence, identifying potential differences in the cellular immune response of patients with different EBV-associated diseases or different courses of the same disorder requires interrogation of a maximum number of EBV antigens. Here, we tested three novel EBV-derived antigen formulations for their ability to reactivate virus-specific T cells ex vivo in patients with EBV-associated infectious mononucleosis (IM).
METHODS METHODS
We comparatively analyzed EBV-specific CD4+ and CD8+ T-cell responses to three EBV-derived antigen formulations in 20 pediatric patients during the early phase of IM: T-activated EBV proteins (BZLF1, EBNA3A) and EBV-like particles (EB-VLP), both able to induce CD4+ and CD8+ T-cell responses ex vivo, as well as an EBV-derived peptide pool (PP) covering 94 well-characterized CD8+ T-cell epitopes. We assessed the specificity, magnitude, kinetics, and functional characteristics of EBV-specific immune responses at two sequential time points (v1 and v2) within the first six weeks after IM symptom onset (T
RESULTS RESULTS
All three tested EBV-derived antigen formulations enabled the detection of EBV-reactive T cells during the early phase of IM without prior T-cell expansion in vitro. EBV-reactive CD4+ and CD8+ T cells were mainly mono-functional (CD4+: mean 64.92%, range 56.15-71.71%; CD8+: mean 58.55%, range 11.79-85.22%) within the first two weeks after symptom onset (v1) with IFN-γ and TNF-secreting cells representing the majority of mono-functional EBV-reactive T cells. By contrast, PP-reactive CD8+ T cells were primarily bi-functional (>60% at v1 and v2), produced IFN-γ and TNF and had more tri-functional than mono-functional components. We observed a moderate correlation between viral load and EBNA3A, EB-VLP, and PP-reactive CD8+ T cells (r
CONCLUSIONS CONCLUSIONS
All three EBV-derived antigen formulations represent innovative and generic recall antigens suitable for monitoring EBV-specific T-cell responses ex vivo. Their combined use facilitates a thorough analysis of EBV-specific T-cell immunity and allows the identification of functional T-cell signatures linked to disease development and severity.

Identifiants

pubmed: 38877590
doi: 10.1186/s12985-024-02411-0
pii: 10.1186/s12985-024-02411-0
doi:

Substances chimiques

Antigens, Viral 0
Epitopes, T-Lymphocyte 0

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

139

Informations de copyright

© 2024. The Author(s).

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Auteurs

Franziska Fischer (F)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Johannes Mücke (J)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Louisa Werny (L)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.
Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany.

Katrin Gerrer (K)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Lorenz Mihatsch (L)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Stefanie Zehetmaier (S)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.
Research Unit Gene Vectors, Helmholtz Munich, Munich, Germany.

Isa Riedel (I)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Jonas Geisperger (J)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Maren Bodenhausen (M)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Lina Schulte-Hillen (L)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.

Dieter Hoffmann (D)

Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany.

Ulrike Protzer (U)

Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany.
German Centre for Infection Research (DZIF), Munich, Germany.

Josef Mautner (J)

Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany.
Research Unit Gene Vectors, Helmholtz Munich, Munich, Germany.
German Centre for Infection Research (DZIF), Munich, Germany.

Uta Behrends (U)

Children's Hospital, School of Medicine, Technical University of Munich, Munich, Germany.
Research Unit Gene Vectors, Helmholtz Munich, Munich, Germany.
German Centre for Infection Research (DZIF), Munich, Germany.

Tanja Bauer (T)

Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany.
German Centre for Infection Research (DZIF), Munich, Germany.

Nina Körber (N)

Institute of Virology, School of Medicine, Technical University of Munich and Helmholtz Munich, Schneckenburgerstr. 8, 81675, Munich, Germany. nina.koerber@helmholtz-munich.de.
German Centre for Infection Research (DZIF), Munich, Germany. nina.koerber@helmholtz-munich.de.

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