Bystander T Cells: a Balancing Act of Friends and Foes

• Autores: Sarah K. Whiteside, Jeremy P. Snook, Matthew A. Williams, Janis J. Weis
• Localización: Trends in immunology, ISSN 1471-4906, Vol. 39, Nº. 12, 2018, págs. 1021-1035
• Idioma: inglés
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• Resumen

  • T cell responses are essential for appropriate protection against pathogens. T cell immunity is achieved through the ability to discriminate between foreign and self-molecules, and this relies heavily on stringent T cell receptor (TCR) specificity. Recently, bystander activated T lymphocytes, that are specific for unrelated epitopes during an antigen-specific response, have been implicated in diverse diseases. Numerous infection models have challenged the classic dogma of T cell activation as being solely dependent on TCR and major histocompatibility complex (MHC) interactions, indicating an unappreciated role for pathogen-associated receptors on T cells. We discuss here the specific roles of bystander activated T cells in pathogenesis, shedding light on the ability of these cells to modulate disease severity independently from TCR recognition