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IL-33 augments virus-specific memory T Cell inflation and potentiates the efficacy of an attenuated cytomegalovirus-based vaccinea

McLaren, James, Clement, Mathew, Marsden, Morgan, Miners, Kelly L., Llewellyn-Lacey, Sian, Grant, Emma J., Rubina, Anzelika, Gimeno Brias, Silvia, Gostick, Emma, Stacey, Maria A., Orr, Selinda J., Stanton, Richard J., Ladell, Kristin, Price, David A. and Humphreys, Ian R. 2019. IL-33 augments virus-specific memory T Cell inflation and potentiates the efficacy of an attenuated cytomegalovirus-based vaccinea. Journal of Immunology 202 (2) , ji1701757. 10.4049/jimmunol.1701757

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Abstract

Candidate vaccines designed to generate T cell–based immunity are typically vectored by nonpersistent viruses, which largely fail to elicit durable effector memory T cell responses. This limitation can be overcome using recombinant strains of CMV. Proof-of-principle studies have demonstrated the potential benefits of this approach, most notably in the SIV model, but safety concerns require the development of nonreplicating alternatives with comparable immunogenicity. In this study, we show that IL-33 promotes the accumulation and recall kinetics of circulating and tissue-resident memory T cells in mice infected with murine CMV. Using a replication-deficient murine CMV vector, we further show that exogenous IL-33 boosts vaccine-induced memory T cell responses, which protect against subsequent heterologous viral challenge. These data suggest that IL-33 could serve as a useful adjuvant to improve the efficacy of vaccines based on attenuated derivatives of CMV.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: American Association of Immunologists
ISSN: 0022-1767
Date of First Compliant Deposit: 18 January 2019
Date of Acceptance: 21 November 2018
Last Modified: 28 Feb 2019 22:34
URI: http://orca.cf.ac.uk/id/eprint/118404

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