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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Immunity 2017 ; 47 (1): 148-158.e5 Nephropedia Template TP
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An ocular commensal protects against corneal infection by driving an Interleukin 17 response from mucosal ?? T cells #MMPMID28709803
Immunity 2017[Jul]; 47 (1): 148-158.e5 PMID28709803show ga
Mucosal sites such as the intestine, oral cavity, nasopharynx, and vagina all have associated commensal flora. The surface of the eye is also a mucosal site, but proof of a living, resident ocular microbiome remains elusive. Here, we used a mouse model of ocular surface disease to reveal that commensals were present in the ocular mucosa and had functional immunological consequences. We isolated one such candidate commensal, Corynebacterium mastitidis and showed that this organism elicited a commensal-specific interleukin 17 response from ?? T cells in the ocular mucosa that was central to local immunity. The commensal-specfic response drove neutrophil recruitment and the release of antimicrobials into the tears, and protected the eye from pathogenic Candida albicans or Pseudomonas aeruginosa infection. Our findings provide direct evidence that a resident commensal microbiome exists on the ocular surface and identify the cellular mechanisms underlying its effects on ocular immune homeostasis and host defense.