The HDDC2 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population targeting the HDDC2 gene in HEK293T cells. This product provides a loss-of-function model to study HDDC2-mediated regulation of innate immune signaling. The polyclonal population offers a heterogeneous knockout pool, suitable for studying gene function without clonal selection artifacts.
HEK293T cells are a well-established human embryonic kidney epithelial cell line transformed with adenovirus type 5 DNA and stably expressing the SV40 large T antigen. These cells are widely employed in biomedical research due to their high transfection efficiency, robust recombinant protein expression, and utility in lentivirus production. Their epithelial origin and intact innate immune signaling components make them a suitable host for investigating antiviral responses and signal transduction.
HDDC2 encodes a negative regulator of type I interferon (IFN) signaling. The protein functions downstream of pattern recognition receptors such as RIG-I, MDA5, and TLR3, where it interacts with TRAF3 to mediate its dephosphorylation. By dephosphorylating TRAF3, HDDC2 attenuates the activation of downstream kinases TBK1 and IKK??, thereby inhibiting the phosphorylation and nuclear translocation of transcription factors IRF3 and IRF7. This results in reduced transcription of IFNB1 and interferon-stimulated genes (ISGs), dampening the innate immune response. HDDC2 is thus a key checkpoint that modulates the amplitude of antiviral signaling, with potential implications in immune evasion by viruses and chronic inflammatory conditions.
In the HEK293T background, knockout of HDDC2 is expected to disrupt this negative regulatory loop, leading to elevated TRAF3 phosphorylation, sustained TBK1/IKK?? activation, and enhanced IRF3/IRF7-dependent transcription. HEK293T cells endogenously express key components of the RIG-I-like receptor and Toll-like receptor pathways, including RIG-I, MDA5, MAVS, TRAF3, TBK1, and IRF3, making them a physiologically relevant epithelial cell platform for studying innate immunity. The absence of a functional HDDC2 phosphatase in this polyclonal knockout population can unmask the full activation potential of these pathways, providing a sensitized background for analyzing interferon induction and antiviral gene expression. This model enables researchers to dissect the contribution of HDDC2 to innate immune regulation in a tractable system.
These polyclonal knockout cells are suited for a range of experimental approaches, including Western blotting to assess TRAF3 phosphorylation status, IFN-?? luciferase reporter assays to quantify type I interferon induction, RT-qPCR to measure IFNB1 and ISG transcript levels, and co-immunoprecipitation to probe HDDC2-TRAF3 interactions. They can also be employed in viral replication assays to evaluate the impact of enhanced or dysregulated interferon responses on pathogen proliferation. The cells provide a versatile platform for drug screening aimed at targeting innate immune regulators and for studying crosstalk between innate immunity and other signaling cascades such as NF-??B. For further details or to discuss custom applications, please contact Ascent Research.
