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CD70 defines a subset of proinflammatory and CNS-pathogenic TH1/TH17 lymphocytes and is overexpressed in multiple sclerosis.


ABSTRACT: CD70 is the unique ligand of CD27 and is expressed on immune cells only upon activation. Therefore, engagement of the costimulatory CD27/CD70 pathway is solely dependent on upregulation of CD70. However, the T cell-intrinsic effect and function of human CD70 remain underexplored. Herein, we describe that CD70 expression distinguishes proinflammatory CD4+ T lymphocytes that display an increased potential to migrate into the central nervous system (CNS). Upregulation of CD70 on CD4+ T lymphocytes is induced by TGF-?1 and TGF-?3, which promote a pathogenic phenotype. In addition, CD70 is associated with a TH1 and TH17 profile of lymphocytes and is important for T-bet and IFN-? expression by both T helper subtypes. Moreover, adoptive transfer of CD70-/-CD4+ T lymphocytes induced less severe experimental autoimmune encephalomyelitis (EAE) disease than transfer of WT CD4+ T lymphocytes. CD70+CD4+ T lymphocytes are found in the CNS during acute autoimmune inflammation in humans and mice, highlighting CD70 as both an immune marker and an important costimulator of highly pathogenic proinflammatory TH1/TH17 lymphocytes infiltrating the CNS.

SUBMITTER: Dhaeze T 

PROVIDER: S-EPMC6804668 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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CD70 is the unique ligand of CD27 and is expressed on immune cells only upon activation. Therefore, engagement of the costimulatory CD27/CD70 pathway is solely dependent on upregulation of CD70. However, the T cell-intrinsic effect and function of human CD70 remain underexplored. Herein, we describe that CD70 expression distinguishes proinflammatory CD4<sup>+</sup> T lymphocytes that display an increased potential to migrate into the central nervous system (CNS). Upregulation of CD70 on CD4<sup>  ...[more]

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