A novel method for detecting antigen-specific human regulatory T cells

Lisa M Ebert1, Sarah E MacRaild, Ian D Davis

  • 1Ludwig Institute for Cancer Research (Melbourne-Austin Branch), Melbourne, Australia.

Antigenic epitopes recognized by FoxP3(+) regulatory T cells (Treg) are poorly defined, largely due to a lack of assays for determining Treg specificity. We have developed a novel approach for detecting human Treg specific to peptide antigen, utilizing down-regulation of surface CD3 as a read-out of antigen recognition. Culture conditions and re-stimulation time have been optimized, allowing the detection of even very rare Treg, such as those specific to tumor antigens.

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