The HDAC8 Knockout NCI-H1703 Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population featuring targeted disruption of the HDAC8 gene in Homo sapiens NCI-H1703 lung squamous cell carcinoma epithelial cells. This polyclonal knockout population offers a loss-of-function model that retains the inherent heterogeneity of the parental line, enabling studies of HDAC8 function without clonal selection.
The NCI-H1703 cell line was originally derived from a lung squamous cell carcinoma of a 54-year-old male and serves as a well-characterized in vitro model for studying lung squamous cell carcinoma pathogenesis, therapeutic responses, and tumor biology. These adherent epithelial cells recapitulate key molecular features of the tumor type, making them suitable for dissecting oncogenic signaling networks and evaluating candidate therapeutics in a disease-relevant background.
HDAC8 encodes a class I histone deacetylase that removes acetyl groups from lysine residues on histones (H3 at K9, K14; H4 at K16) and non-histone substrates such as SMC3, p53, HSP70, and cortactin. This deacetylase activity is tightly regulated by upstream kinases including cAMP-dependent protein kinase (PKA) and casein kinase 2 (CK2), and is modulated by transcription factor YY1. HDAC8 functions within the cohesin complex by deacetylating SMC3, a modification essential for cohesin loading and unloading during cell cycle progression, and also deacetylates p53, suppressing its transcriptional activity and inhibiting apoptosis. Additionally, HDAC8 interacts with RAD21, SMC1A, NCOR1, and HSP70, placing it at the nexus of chromatin remodeling, cell cycle control, and stress responses. Its enzymatic activity promotes chromatin condensation and transcriptional repression, influencing pathways such as Wnt signaling, NF-??B signaling, and the cohesin pathway.
In the context of NCI-H1703 lung squamous cell carcinoma cells, HDAC8-mediated deacetylation is implicated in sustaining oncogenic phenotypes, including unchecked proliferation, evasion of apoptosis, and enhanced migratory capacity. The knockout model therefore enables precise dissection of HDAC8 contributions to lung cancer biology, particularly its role in modulating histone acetylation landscapes and non-histone targets such as the cohesin complex and p53. Given the involvement of HDAC8 in Cornelia de Lange syndrome and malignancies such as acute myeloid leukemia and neuroblastoma, this model also provides a platform for exploring disease-relevant mechanisms beyond lung carcinoma.
Researchers can employ this polyclonal knockout population in western blotting to assess HDAC8 ablation and acetylated histone changes, RT-qPCR for gene expression, and HDAC activity assays. Cellular phenotyping assays like proliferation, apoptosis, and migration/invasion tests can delineate HDAC8 disruption effects, while ChIP-qPCR maps histone acetylation changes. The model is suitable for HDAC8 inhibitor screening and epigenetic therapy evaluation in lung cancer. For further information, please contact Ascent Research.
