IL-17A-dependent CD4+CD25+ regulatory T cells promote immune privilege of corneal allografts.
IL-17A-dependent CD4+CD25+ regulatory T cells promote immune privilege of corneal allografts.
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DOI:
10.4049/jimmunol.1100101
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发表时间:
2011-06-15
期刊:
影响因子:
--
通讯作者:
Niederkorn JY
中科院分区:
文献类型:
--
作者:
Cunnusamy K;Chen PW;Niederkorn JY
IL-17A is a pro-inflammatory cytokine that has received attention for its role in the pathogenesis of several autoimmune diseases. IL-17A has also been implicated in cardiac and renal allograft rejection. Accordingly, we hypothesized that depletion of IL-17A would enhance corneal allograft survival. Instead, our results demonstrate that blocking IL-17A in a mouse model of keratoplasty accelerated the tempo and increased the incidence of allograft rejection from 50% to 90%. We describe a novel mechanism by which CD4+CD25+ T regulatory cells (Tregs) respond to IL-17A and enhance corneal allograft survival. Our findings suggest that: 1) IL-17A is necessary for ocular immune privilege; 2) IL-17A is not required for the induction of anterior chamber-associated immune deviation (ACAID); 3) Tregs require IL-17A to mediate a contact-dependent suppression; 4) corneal allograft Tregs suppress the efferent arm of the immune response and are antigen-specific; 5) Tregs are not required for corneal allograft survival beyond day 30; and 6) corneal allograft-induced Treg-mediated suppression is transient. Our findings identify IL-17A as a cytokine essential for the maintenance of corneal immune privilege and establish a new paradigm whereby interplay between IL-17A and CD4+CD25+ Tregs is necessary for survival of corneal allografts.
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影响因子:
4.4
作者:
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
Chemical immunology and allergy
影响因子:
--
作者:
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通讯作者:
Niederkorn, Jerry Y
影响因子:
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通讯作者:
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