T cell and Dendritic Cell function

T cell and Dendritic Cell function refers to the complex physiological interplay between professional antigen-presenting cells (Dendritic Cells) and T lymphocytes, which is fundamental to the adaptive immune system (Worbs et al., 2017, Nature Reviews Immunology). Dendritic cells (DCs) capture antigens, migrate to lymphoid organs, and present processed peptides on Major Histocompatibility Complex (MHC) molecules to T-cell receptors (TCRs) (Banchereau & Steinman, 1998, Nature). This interaction, supplemented by co-stimulatory signals such as CD80/86 binding to CD28, leads to T-cell activation, proliferation, and differentiation (Sharpe & Freeman, 2002, Nature Reviews Immunology). While this process is the site of action for numerous immunotherapy targets such as checkpoint inhibitors (e.g., PD-1/PD-L1) and agonists (e.g., CD40), the term itself describes a multi-step biological pathway rather than a single molecular entity (Mellman & Steinman, 2001, Cell). Dysregulation of this function is central to the pathogenesis of cancer, where immune evasion occurs, and autoimmune diseases, where self-tolerance is lost (Gardner & Ruffell, 2016, Trends in Immunology). Therapeutic strategies often aim to enhance this function in oncology through vaccines or checkpoint blockade, or suppress it in transplantation and autoimmunity using immunosuppressants (Steinman & Banchereau, 2007, Nature). The efficacy of these interventions often depends on the maturation state of the dendritic cells and the specific cytokine environment during the T-cell priming phase (Joffre et al., 2009, Nature Reviews Immunology).

Other names

Dendritic cell-T cell interactionAntigen presentation pathwayImmunological synapseDC-T cell axis

Modulation of the immunological synapse and co-stimulatory or inhibitory signaling pathways between antigen-presenting cells and T cells.