alexa gammadelta T cells are critical for the induction of anterior chamber-associated immune deviation.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Xu Y, Kapp JA

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Abstract Anterior chamber-associated immune deviation (ACAID) is a systemic form of tolerance that is elicited by introducing antigens into the anterior chamber of the eye. ACAID is characterized by deficiencies in delayed-type hypersensitivity and complement-fixing antibodies upon subsequent challenge with antigen. The mechanisms responsible for the generation of this form of tolerance are not yet completely clear. Here we asked whether gammadelta T cells, which are critical in the induction of oral tolerance and nasal tolerance, play a role in ACAID. The percentage of splenic gammadelta T cells was higher in mice that received antigen via the anterior chamber compared to untreated mice. In addition, CD44 was up-regulated on some splenic gammadelta and alphabeta T cells after the intraocular injection of antigen. Moreover, administration of antigen into the anterior chamber did not induce ACAID in the C57BL/6 mice pretreated with anti-mouse delta-chain monoclonal antibody or in the gammadelta T-cell-receptor-deficient (delta-/-) mice. gammadelta T cells from wild-type mice reconstituted ACAID when transferred into the delta-/- mice before injection of antigen, verifying that the deficiency in delta-/- mice results from the lack of gammadelta T cells rather than from an inadvertent change caused by deletion of the delta-chain. These findings indicate that gammadelta T cells play a very important role in ocular tolerance.
This article was published in Immunology and referenced in Journal of Clinical & Cellular Immunology

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