T-cell tolerance

T-cell tolerance is not a molecule, receptor, or protein but rather a physiological state and process by which T lymphocytes become unresponsive to specific antigens, particularly self-antigens. This mechanism is essential for preventing autoimmune reactions and maintaining self-tolerance. There are two main forms: 1. Central tolerance occurs in the thymus during T cell development through negative selection—eliminating autoreactive cells—and generation of regulatory T cells that suppress inappropriate responses[2][7][9]. 2. Peripheral tolerance acts on mature T cells in peripheral tissues via mechanisms such as anergy, suppression by regulatory T cells, and deletion[10]. Disruption in these processes can lead to autoimmune diseases; conversely, excessive or inappropriate induction may contribute to cancer progression by allowing tumors to evade immune detection[3]. While critical for health, "T-cell tolerance" itself is not a druggable target but rather an immunological outcome resulting from multiple molecular pathways and cellular interactions. Because "T-cell tolerance" refers to a biological process—not a discrete molecular entity—it does not have canonical abbreviations, direct interacting drugs, mechanisms of action typical for therapeutic targets, nor established biomarkers specific solely for its measurement. It should not be listed as a therapeutic target molecule/receptor; instead it describes the desired state achieved through modulation of various targets involved in immunity[1][4][5].

Other names

T cell-mediated immune toleranceImmune tolerance (in the context of T cells)Immunological tolerance (T cell-specific)