[en] The vaccinia virus (VACV) N1 protein is an intracellular virulence factor that has a Bcl-2-like structure and inhibits both apoptosis and signalling from the interleukin 1 receptor, leading to nuclear factor kappa B activation. Here, we investigated the immune response to intranasal infection with a virus lacking the N1L gene (vDeltaN1L) compared with control viruses expressing N1L. Data presented show that deletion of N1L did not affect the proportion of CD4+ and CD8+ T cells infiltrating the lungs or the cytotoxic T-cell activity of these cells. However, vDeltaN1L induced an increased local natural killer cell activity between days 4 and 6 post-infection. In addition, in the absence of N1 the host inflammatory infiltrate was characterized by a reduced proportion of lymphocytes bearing the early activation marker CD69. Notably, there was a good correlation between the level of CD69 expression and weight loss. The implications of these findings are discussed.
Disciplines :
Immunology & infectious disease
Author, co-author :
Jacobs, Nathalie ; Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
Bartlett, Nathan W
Clark, Richard H
Smith, Geoffrey L; Imperial College London
Language :
English
Title :
Vaccinia virus lacking the Bcl-2-like protein N1 induces a stronger natural killer cell response to infection.
Publication date :
2008
Journal title :
Journal of General Virology
ISSN :
0022-1317
eISSN :
1465-2099
Publisher :
Society for General Microbiology, London, United Kingdom
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