Memory T cells in nonlymphoid tissue that provide enhanced local immunity during infection with herpes simplex virus.

Department of Microbiology and Immunology, The University of Melbourne, Melbourne Victoria, Australia.
Nature Immunology (Impact Factor: 24.97). 04/2009; 10(5):524-30. DOI: 10.1038/ni.1718
Source: PubMed

ABSTRACT Effective immunity is dependent on long-surviving memory T cells. Various memory subsets make distinct contributions to immune protection, especially in peripheral infection. It has been suggested that T cells in nonlymphoid tissues are important during local infection, although their relationship with populations in the circulation remains poorly defined. Here we describe a unique memory T cell subset present after acute infection with herpes simplex virus that remained resident in the skin and in latently infected sensory ganglia. These T cells were in disequilibrium with the circulating lymphocyte pool and controlled new infection with this virus. Thus, these cells represent an example of tissue-resident memory T cells that can provide protective immunity at points of pathogen entry.

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