The HCFC1R1 knockout CAL-27 polyclonal cells are a heterogeneous population of CRISPR/Cas9-edited oral squamous cell carcinoma (OSCC) cells engineered for targeted disruption of the HCFC1R1 gene. As a polyclonal knockout pool, this product comprises a mixture of cells carrying diverse edit types at the HCFC1R1 locus, avoiding the pitfalls of clonal selection and providing a more comprehensive loss-of-function phenotype. The cells serve as a reliable model to probe HCFC1R1 functions and its interplay with the critical transcriptional coactivator HCFC1 in a disease-relevant epithelial tumor context.
The parental CAL-27 cell line originates from a tongue squamous cell carcinoma of a 56-year-old male patient and is widely used as a model for head and neck cancers. These adherent epithelial-like cells exhibit characteristic features of OSCC, including uncontrolled proliferation and invasive potential. CAL-27 cells retain key oncogenic signaling programs, making them suitable for dissecting molecular events underlying oral carcinogenesis. Their use as the host for HCFC1R1 knockout provides a physiologically relevant environment in which to study the gene??s contributions to epithelial tumor biology.
HCFC1R1 acts as a negative regulator of HCFC1, a transcriptional coactivator that forms complexes with chromatin modifiers such as SIN3A and OGT. HCFC1 is essential for E2F1-dependent transcription of cell cycle genes (CCND1, CCNB1) and cooperates with VP16 and Oct-1 during herpes simplex virus immediate-early gene expression. By restraining HCFC1 activity, HCFC1R1 controls proliferation and viral response. Knockout of HCFC1R1 in CAL-27 cells likely derepresses HCFC1, impacting CDK4-cyclin D1 signaling and viral gene activation.
Within the OSCC context, HCFC1R1 disruption is expected to alter HCFC1-mediated regulation of proliferation and gene expression. This model enables dissection of HCFC1-dependent transcriptional networks and their role in maintaining the malignant phenotype of CAL-27 cells. Comparative studies of wild-type and knockout populations can reveal changes in cell cycle profiles, growth rates, and susceptibility to HSV infection, providing insights into oral cancer biology and potential therapeutic targets.
Researchers can employ western blotting to confirm HCFC1R1 and HCFC1 levels, RT-qPCR to quantify target gene expression (CCND1, CCNB1, E2F1), and functional assays to assess proliferation and viral replication. Flow cytometry enables cell cycle analysis, while RNA-seq and co-immunoprecipitation methods provide transcriptome-wide and protein?Cprotein interaction insights. The polyclonal population is well-suited for drug response testing and host?Cpathogen interaction studies. For more details, please contact Ascent Research.
