Elevated Expression of CD160 and 2B4 Defines a Cytolytic HIV-Specific CD8+ T-Cell Population in Elite Controllers

C Pombo, EJ Wherry, E Gostick… - The Journal of …, 2015 - academic.oup.com
C Pombo, EJ Wherry, E Gostick, DA Price, MR Betts
The Journal of infectious diseases, 2015academic.oup.com
During chronic human immunodeficiency virus (HIV) infection, virus-specific CD8+ T cells
become functionally exhausted. Unlike most chronically infected individuals, elite controllers
of HIV retain CD8+ T-cell polyfunctionality and cytolytic capacity. It remains unclear whether
elite controllers manifest T-cell exhaustion similar to subjects with chronic progression of HIV
infection. Here we assessed coexpression of PD-1, Lag-3, CD160, and 2B4 as a measure of
T-cell exhaustion in a cohort of elite controllers and in chronic progressors. We found that …
Abstract
During chronic human immunodeficiency virus (HIV) infection, virus-specific CD8+ T cells become functionally exhausted. Unlike most chronically infected individuals, elite controllers of HIV retain CD8+ T-cell polyfunctionality and cytolytic capacity. It remains unclear whether elite controllers manifest T-cell exhaustion similar to subjects with chronic progression of HIV infection. Here we assessed coexpression of PD-1, Lag-3, CD160, and 2B4 as a measure of T-cell exhaustion in a cohort of elite controllers and in chronic progressors. We found that elite controllers have a high proportion of potentially exhausted (PD1+CD160+2B4+) HIV-specific CD8+ T cells that is comparable to the proportion in chronic progressors. However, elite controllers also harbor a population of HIV-specific CD160+2B4+ CD8+ T cells that correlates with cytolytic capacity, as measured by perforin expression, a population not commonly present in chronic progressors. We therefore propose that coexpression of CD160 and 2B4 delineates a population of cytolytic CD8+ T cells important for the control of HIV.
Oxford University Press