The KDM5A Knockout HeLa Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal population with targeted disruption of the KDM5A locus, creating a loss-of-function model to explore KDM5A biological functions without the limitations of clonal variation. The pool retains cellular heterogeneity, making it suitable for population-level analyses of KDM5A-dependent processes.
HeLa cells are an immortalized cervical adenocarcinoma line with integrated HPV-18, constitutively expressing E6 and E7 oncoproteins that degrade p53 and inhibit RB, respectively. This extensively characterized model is central to studies of HPV-driven oncogenesis, epithelial biology, and therapeutic response, and its high transfection efficiency supports robust CRISPR-based gene engineering.
KDM5A encodes a histone demethylase specific for H3K4me2/3, acting as a transcriptional repressor through chromatin modification. KDM5A is transcriptionally induced by E2F and interacts with RB, SIN3A, HDAC1/2, NuRD, and LSD1 to silence downstream targets including p21, Cyclin D1, E-cadherin, HOXA genes, and PTEN. Its activity is modulated by c-MYC, TGF-??, and ATR kinase, placing KDM5A at a key regulatory node controlling cell cycle entry, senescence, and epigenetic gene silencing.
In the HeLa context with compromised RB, KDM5A is frequently overexpressed and promotes tumorigenesis by suppressing growth-inhibitory genes. Knockout of KDM5A in this background enables dissection of its oncogenic role, dependence of cervical cancer cells on demethylase activity, and interplay with HPV oncoproteins. The model facilitates screening for inhibitors that restore tumor suppressor expression and evaluating epigenetic combination therapies.
Typical applications include ChIP-qPCR to assess H3K4me3 enrichment at target loci, Western blotting and RT-qPCR for quantifying KDM5A, p21, and Cyclin D1, and immunofluorescence for histone marks. Functional studies employ proliferation (EdU/MTT), flow cytometry for cell cycle distribution, clonogenic survival, and E2F reporter assays. Transcriptomic profiling via RNA-seq and protein interaction mapping by co-immunoprecipitation further define KDM5A networks. These cells are a powerful tool for histone demethylase inhibitor screening and mechanistic studies of epigenetic regulation in cancer and senescence. For additional information, please contact Ascent Research.
