CD4 <sup>+</sup> T-cell–independent mechanisms suppress reactivation of latent tuberculosis in a macaque model of HIV coinfection

書誌事項

公開日
2016-09-06
権利情報
  • http://www.pnas.org/site/misc/userlicense.xhtml
DOI
  • 10.1073/pnas.1611987113
公開者
National Academy of Sciences

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説明

<jats:title>Significance</jats:title> <jats:p> According to the World Health Organization, one in three humans is latently infected with <jats:italic>Mycobacterium tuberculosis</jats:italic> and 10% of these individuals risk developing active, clinical tuberculosis (TB) over their lifetimes. Coinfection with human immunodeficiency virus increases this risk substantially, with depletion of CD4 <jats:sup>+</jats:sup> T cells believed to drive disease progression. Although a minority of coinfected individuals can control the infection, the mechanisms underlying this phenomenon remain unknown. Modeling coinfection using macaques, we discovered that one-third of the animals maintained latency despite complete ablation of lung CD4 <jats:sup>+</jats:sup> T cells. We report that protective immune responses mediated by CD8 <jats:sup>+</jats:sup> T cells and B cells correlate with TB control. These findings have important implications in development of both prophylactic and therapeutic measures against TB and acquired immunodeficiency syndrome. </jats:p>

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