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Immunization with vaccinia virus induces polyfunctional and phenotypically distinctive CD8+T cell responses

Precopio, Melissa L., Betts, Michael R., Parrino, Janie, Price, David, Gostick, Emma, Ambrozak, David R., Asher, Tedi E., Douek, Daniel C., Harari, Alexandre, Pantaleo, Giuseppe, Bailer, Robert, Graham, Barney S., Roederer, Mario and Koup, Richard A. 2007. Immunization with vaccinia virus induces polyfunctional and phenotypically distinctive CD8+T cell responses. Journal of Experimental Medicine 204 (6) , p. 1405. 10.1084/jem.20062363

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Vaccinia virus immunization provides lifelong protection against smallpox, but the mechanisms of this exquisite protection are unknown. We used polychromatic flow cytometry to characterize the functional and phenotypic profile of CD8+ T cells induced by vaccinia virus immunization in a comparative vaccine trial of modified vaccinia virus Ankara (MVA) versus Dryvax immunization in which protection was assessed against subsequent Dryvax challenge. Vaccinia virus–specific CD8+ T cells induced by both MVA and Dryvax were highly polyfunctional; they degranulated and produced interferon γ, interleukin 2, macrophage inflammatory protein 1β, and tumor necrosis factor α after antigenic stimulation. Responding CD8+ T cells exhibited an unusual phenotype (CD45RO−CD27intermediate). The unique phenotype and high degree of polyfunctionality induced by vaccinia virus also extended to inserted HIV gene products of recombinant NYVAC. This quality of the CD8+ T cell response may be at least partially responsible for the profound efficacy of these vaccines in protection against smallpox and serves as a benchmark against which other vaccines can be evaluated.

Item Type: Article
Status: Published
Schools: Medicine
Subjects: Q Science > QR Microbiology > QR180 Immunology
Additional Information: Published PDF uploaded in accordance with policy at [accessed 22/06/2016]
Publisher: Rockefeller University Press
ISSN: 0022-1007
Date of First Compliant Deposit: 28 April 2016
Date of Acceptance: 11 June 2007
Last Modified: 04 Jun 2017 09:04

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