Type 1 Cytotoxic T Lymphocyte (Tc1)

Tc1 lymphocytes are a subset of CD8+ T cells that play a critical role in cell-mediated immunity, particularly against viral infections and tumors. They are characterized by their production of IFN-γ and TNF-α, as well as their potent cytolytic activity mediated by granzyme B and perforin. Differentiation into the Tc1 lineage is driven by IL-12 and IFN-γ, and regulated by transcription factors such as T-bet, Blimp-1 and IRF4. Imbalances in Tc1 populations can contribute to disease susceptibility, while adoptive transfer of Tc1 cells shows promise in cancer immunotherapy.

Other names

Tc1 LymphocyteType 1 CD8+ T cellIFN-γ-producing CD8+ T cell

Tc1 cells exert their cytotoxic function primarily through the release of granzyme B and perforin, leading to target cell apoptosis. They also secrete IFN-γ and TNF-α, which contribute to immune regulation and direct anti-tumor effects.