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ICOS-ICOSL Pathway in T-Helper Cell


During immune response, T-cells are optimally activated in secondary lymphoid tissues in order to properly migrate into areas of inflamed tissue. Upon antigen recognition via the TCR (T-Cell Receptor)/CD3 (CD3 Antigen) complex, a second co-stimulatory signal from APCs or Antigen-Presenting Cells is necessary for activation of naive T-cells. According to the “Two-Signal Model” for T-cell activation, although the engagement of T[...]




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