Authors:
LK Mackay, L Wakim, CJ van Vliet, CM Jones, SN Mueller, O Bannard, DT Fearon, WR Heath, FR Carbone
Journal name: 
J Immunol
Citation info: 
188(5):2173-2178
Abstract: 
Persisting infections are often associated with chronic T cell activation. For certain pathogens, this can lead to T cell exhaustion and survival of what is otherwise a cleared infection. In contrast, for herpesviruses, T cells never eliminate infection once it is established. Instead, effective immunity appears to maintain these pathogens in a state of latency. We used infection with HSV to examine whether effector-type T cells undergoing chronic stimulation retained functional and proliferative capacity during latency and subsequent reactivation. We found that latency-associated T cells exhibited a polyfunctional phenotype and could secrete a range of effector cytokines. These T cells were also capable of mounting a recall proliferative response on HSV reactivation and could do so repeatedly. Thus, for this latent infection, T cells subjected to chronic Ag stimulation and periodic reactivation retain the ability to respond to local virus challenge.
DOI: 
http://doi.org/10.4049/jimmunol.1102719
E-pub date: 
01 Mar 2012