STAT-3-independent production of IL-17 by mouse innate-like ?? T cells controls ocular infection.

ABSTRACT: Appropriate regulation of IL-17 production in the host can mean the difference between effective control of pathogens and uncontrolled inflammation that causes tissue damage. Investigation of conventional CD4⁺ T cells (Th17 cells) has yielded invaluable insights into IL-17 function and its regulation. More recently, we and others reported production of IL-17 from innate ??+ T cell populations, which was shown to occur primarily via IL-23R signaling through the transcription factor STAT-3. In our current study, we identify promyelocytic leukemia zinc finger (PLZF)-expressing iNKT, CD4^-/CD8⁺, and CD4^-/CD8^- (DN) ??+T cells, which produce IL-17 in response to TCR and IL-1 receptor ligation independently of STAT-3 signaling. Notably, this noncanonical pathway of IL-17 production may be important in mucosal defense and is by itself sufficient to control pathogenic Staphylococcus aureus infection at the ocular surface.

SUBMITTER: St Leger AJ 

PROVIDER: S-EPMC5881461 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature