alexa Protein kinase C-theta mediates negative feedback on regulatory T cell function.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): ZaninZhorov A, Ding Y, Kumari S, Attur M, Hippen KL,

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Abstract T cell receptor (TCR)-dependent regulatory T cell (Treg) activity controls effector T cell (Teff) function and is inhibited by the inflammatory cytokine tumor necrosis factor-alpha (TNF-alpha). Protein kinase C-theta (PKC-theta) recruitment to the immunological synapse is required for full Teff activation. In contrast, PKC-theta was sequestered away from the Treg immunological synapse. Furthermore, PKC-theta blockade enhanced Treg function, demonstrating PKC-theta inhibits Treg-mediated suppression. Inhibition of PKC-theta protected Treg from inactivation by TNF-alpha, restored activity of defective Treg from rheumatoid arthritis patients, and enhanced protection of mice from inflammatory colitis. Treg freed of PKC-theta-mediated inhibition can function in the presence of inflammatory cytokines and thus have therapeutic potential in control of inflammatory diseases.
This article was published in Science and referenced in Journal of Clinical & Cellular Immunology

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