The HELLS Knockout HeLa Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population targeting the HELLS gene in the HeLa cervical cancer cell line. This loss-of-function model is generated via CRISPR/Cas9-mediated gene disruption, yielding a diverse pool of edited cells that minimizes clonal bias. It is ideally suited for functional genomics, epigenetic studies, and cancer research.
HeLa cells are an immortalized human epithelial line derived from cervical adenocarcinoma, characterized by an aneuploid genome and active telomerase. As a widely used cancer model, HeLa offers a robust platform for investigating mechanisms of proliferation, apoptosis, and epigenetic regulation, making it an optimal host for knockout studies.
The HELLS protein (lymphoid-specific helicase, LSH) is an SNF2-family ATPase that couples chromatin remodeling with DNA methylation to enforce gene silencing. It is transcriptionally regulated by E2F and MYC and activated by cell cycle signals. HELLS physically associates with DNMT1, DNMT3B, HDAC1/2, and MBD2/3, and recruits histone methyltransferases G9a and SUV39H1 to deposit H3K9me2/3 marks. This machinery methylates CpG islands at repetitive elements and promoters, including the tumor suppressor CDKN2A, to maintain heterochromatin and genomic stability.
Disrupting HELLS in HeLa cells provides a powerful system to study its roles in cervical cancer pathogenesis. HELLS deficiency can lead to reactivation of silenced tumor suppressor genes, hypomethylation of repetitive elements, and compromised genomic integrity, which may alter proliferation, apoptosis, and migration. Consequently, this model serves as a critical tool for dissecting HELLS-specific contributions to tumorigenesis and epigenetic drug responses. It is also invaluable for exploring the functional interplay between DNA methylation and histone modifications in a cancer context.
Representative applications encompass cell viability by MTT assay, apoptosis by Annexin V/PI staining, colony formation assays, cell cycle analysis by flow cytometry, and wound healing migration assays. The polyclonal knockout population is ideally suited for molecular profiling via western blotting, RT-qPCR, bisulfite sequencing, ChIP-qPCR, and immunofluorescence to interrogate HELLS-dependent methylation and chromatin states. For custom requirements or project-specific inquiries, please reach out to Ascent Research.
