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Defining immune engagement thresholds for in vivo control of virus-driven lymphoproliferation.


ABSTRACT: Persistent infections are subject to constant surveillance by CD8+ cytotoxic T cells (CTL). Their control should therefore depend on MHC class I-restricted epitope presentation. Many epitopes are described for ?-herpesviruses and form a basis for prospective immunotherapies and vaccines. However the quantitative requirements of in vivo immune control for epitope presentation and recognition remain poorly defined. We used Murid Herpesvirus-4 (MuHV-4) to determine for a latently expressed viral epitope how MHC class-I binding and CTL functional avidity impact on host colonization. Tracking MuHV-4 recombinants that differed only in epitope presentation, we found little latitude for sub-optimal MHC class I binding before immune control failed. By contrast, control remained effective across a wide range of T cell functional avidities. Thus, we could define critical engagement thresholds for the in vivo immune control of virus-driven B cell proliferation.

SUBMITTER: Godinho-Silva C 

PROVIDER: S-EPMC4072806 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature

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Defining immune engagement thresholds for in vivo control of virus-driven lymphoproliferation.

Godinho-Silva Cristina C   Marques Sofia S   Fontinha Diana D   Veiga-Fernandes Henrique H   Stevenson Philip G PG   Simas J Pedro JP  

PLoS pathogens 20140626 6


Persistent infections are subject to constant surveillance by CD8+ cytotoxic T cells (CTL). Their control should therefore depend on MHC class I-restricted epitope presentation. Many epitopes are described for γ-herpesviruses and form a basis for prospective immunotherapies and vaccines. However the quantitative requirements of in vivo immune control for epitope presentation and recognition remain poorly defined. We used Murid Herpesvirus-4 (MuHV-4) to determine for a latently expressed viral ep  ...[more]

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