C8166 Cells

The C8166 cell line is a T-cell line transformed by Human T-cell Leukemia Virus type 1 (HTLV-1) and is widely utilized in research on retroviral infections, particularly HIV and HTLV. Initially derived by fusing umbilical cord blood lymphocytes with T-cells from leukemia-lymphoma patients, C8166 cells retain the HTLV-1 genome and express viral RNA without producing infectious HTLV-1 particles. This cell line is notable for its high susceptibility to HIV-1 infection, which is demonstrated by syncytia formation-large, multinucleated cells resulting from viral fusion activity, making it a robust model for studies on HIV pathogenesis and cytopathic effects in vitro.

C8166 cells have been used extensively in studies examining viral gene functions and interactions, such as the HIV-1 viral protein R (Vpr) which can induce G2/M cell cycle arrest and apoptosis in infected T-cells. The introduction of Vpr into C8166 cells has been shown to activate caspase-related apoptotic pathways, implicating its potential as a target in HIV-related apoptosis studies and antiviral therapies. Additionally, C8166’s expression of specific surface markers and sensitivity to HIV-1 entry and replication make it valuable for evaluating the effects of inhibitors on HIV replication and cellular responses under different conditions, including serum-free media which has been shown to alter expression levels of certain receptors and diminish HIV infectivity over time.

This cell line’s adaptability and sensitivity to HIV and HTLV-1 provide a dynamic system for research in virology and immunology, particularly for understanding viral latency, replication mechanisms, and potential therapeutic interventions targeting viral infections in T-cells.