The HIPK1 Knockout HeLa Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HeLa human cervical adenocarcinoma epithelial cell line, with targeted disruption of the HIPK1 gene encoding homeodomain-interacting protein kinase 1. This polyclonal knockout model provides a heterogeneous loss-of-function system for studying the biological roles of HIPK1 without single-cell clonal isolation, enabling robust functional genomics and pathway analysis in a widely used cancer cell background.
The parental HeLa cell line is an HPV18-positive cervical adenocarcinoma model originally isolated from a patient specimen, and it remains among the most extensively characterized human cell lines in biomedical research. HeLa cells exhibit constitutive expression of the HPV18 E6 and E7 oncoproteins, which degrade p53 and inactivate retinoblastoma protein, respectively, creating a permissive cellular environment for studying tumor-suppressive signaling nodes such as HIPK1. The epithelial morphology and adherent growth properties of HeLa cells facilitate a broad range of downstream molecular and cellular assays.
HIPK1 is a serine/threonine kinase that functions as a transcriptional coregulator, integrating stress and developmental signals to modulate apoptosis, proliferation, and gene expression. HIPK1 is activated by DNA damage, Wnt ligands such as Wnt3a, and TGF-?? stimulation, and it phosphorylates key downstream effectors including p53 at Ser46, the Wnt pathway scaffold protein Dvl, and transcription factors TCF/LEF, c-Myb, and CREB. Through these phosphorylation events, HIPK1 influences p53-dependent apoptosis, ??-catenin/TCF-mediated transcription, and TGF-??/SMAD signaling. HIPK1 also physically interacts with p53, Dvl, AXIN1, ??-catenin, and SUMOylation enzymes, positioning it as a critical node in the Wnt and p53 signaling networks.
In the HeLa cellular context, where p53 is already partially inactivated by HPV18 E6, loss of HIPK1 further disrupts DNA damage-induced apoptotic responses and enhances Wnt/??-catenin transcriptional activity. HIPK1 knockout in HeLa cells eliminates HIPK1-catalyzed phosphorylation of residual p53 and Wnt pathway components, thereby impairing stress-induced apoptosis and promoting TCF/LEF-dependent gene expression. This polyclonal knockout population thus enables investigation of HIPK1??s tumor-suppressive functions and its interplay with oncogenic HPV-driven signaling.
This tool is suited for diverse applications including dissecting HIPK1-mediated tumor suppression, exploring cross-talk between Wnt and TGF-?? pathways, and screening for small molecules that modulate HIPK1-dependent signaling. Representative assays include western blotting for phospho-p53 (Ser46) to assess DNA damage signaling, TCF/LEF luciferase reporter assays to quantify Wnt transcriptional output, Annexin V/PI flow cytometry for apoptosis, BrdU incorporation for proliferation, RNA sequencing to profile Wnt target gene expression, and co-immunoprecipitation to capture HIPK1 interactors such as Dvl and ??-catenin. Researchers studying cervical adenocarcinoma biology, epithelial cancers, or neurodegenerative disorders will find this model valuable for mechanistic and drug response studies. For additional technical inquiries and ordering information, please contact Ascent Research.
