The H1-10 knockout HeLa polyclonal cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from HeLa cells. This product provides a heterogeneous pool of cells carrying targeted gene disruptions in H1-10, enabling loss-of-function studies without the need for single-cell cloning. The polyclonal format preserves genetic diversity and is particularly suitable for pooled assays that benefit from broad representation of knockout phenotypes. H1-10 encodes the linker histone variant H1.10, which replaces canonical H1 histones in specific chromatin domains and plays a critical role in higher-order chromatin organization. Disruption of H1-10 in this cell model offers a versatile tool for investigating linker histone biology in a widely used cancer research platform.
HeLa cells originate from a human cervical adenocarcinoma and maintain an epithelial phenotype, driven by integrated HPV18 sequences that express E6 and E7 oncoproteins. As one of the most extensively characterized human cell lines, HeLa provides a well-defined background for genetic manipulation and functional genomics. Their robust proliferation, ease of culture, and responsiveness to CRISPR/Cas9-mediated gene editing make them an ideal host for studying chromatin-related processes. The HeLa model is particularly relevant for examining how H1-10 loss influences chromatin dynamics and transcriptional programs in a malignant context, where epigenetic dysregulation is a hallmark.
H1-10 functions as a linker histone variant that binds nucleosomes and promotes chromatin compaction through interactions with ATP-dependent remodeling complexes such as the SWI/SNF complex, including BRG1, and heterochromatin protein HP1. Its expression is transcriptionally activated by the core pluripotency regulators OCT4, SOX2, and NANOG, and is modulated by Wnt and TGF-?? signaling pathways. H1-10 interacts with core histones H2A, H2B, H3, and H4, influencing nucleosome spacing and the accessibility of regulatory elements. Downstream, it governs the expression of pluripotency genes, differentiation-related genes, and cell cycle regulators, thereby serving as a nexus between extrinsic signals and chromatin-mediated transcriptional control. Knockout of H1-10 is expected to de-repress chromatin, potentially altering gene networks critical for proliferation and identity.
In the HeLa background, H1-10 knockout provides a powerful model to dissect the crosstalk between linker histone variants and oncogenic transformation. HeLa cells exhibit abrogated p53 and Rb tumor suppressor pathways due to HPV E6 and E7, resulting in uncontrolled cell cycle progression and resistance to apoptosis. Loss of H1-10 in this context may further perturb proliferation and survival, offering insights into epigenetic vulnerabilities in cancer. Because H1-10 is associated with stem cell maintenance, its deficiency in an HPV-positive adenocarcinoma line may expose dependencies that can be exploited for therapeutic targeting. The polyclonal nature of the knockout population allows researchers to capture heterogeneous responses and identify subpopulations with distinct phenotypic profiles.
Typical applications include chromatin immunoprecipitation coupled with qPCR or sequencing (ChIP-qPCR/RNA-seq) to map histone occupancy and transcriptional changes, RT-qPCR and western blotting to assess downstream target expression, and immunofluorescence or flow cytometry to evaluate cell cycle alterations and differentiation markers. Proliferation and colony formation assays can be employed to quantify growth phenotypes, while reporter assays may elucidate the influence of Wnt/??-catenin or TGF-??/SMAD signaling. This polyclonal knockout product is designed for researchers investigating chromatin dynamics, transcriptional regulation, cancer epigenetics, and developmental biology. For additional information, technical support, or custom product inquiries, please contact Ascent Research.
