Here we present a CRISPR/Cas9-edited polyclonal knockout cell population in which DIXDC1 has been disrupted in the HeLa cell background. This polyclonal pool comprises a heterogeneous mixture of edited alleles, providing a versatile tool for functional interrogation of DIXDC1-dependent signaling without clonal selection. The knockout population is suitable for a range of downstream assays to assess the impact of DIXDC1 loss on cellular processes.
The host cell line, HeLa, is an extensively characterized human cervical adenocarcinoma cell line originally derived from a 31-year-old African American woman and immortalized with human papillomavirus type 18 (HPV18). As an established model of epithelial cancer, HeLa cells exhibit robust proliferative capacity and are amenable to standard transfection and gene-editing procedures. The HeLa background provides a clinically relevant context for studying the oncogenic signaling networks in which DIXDC1 participates.
DIXDC1 encodes a scaffold protein that serves as a positive regulator of canonical Wnt/??-catenin signal transduction. At the molecular level, DIXDC1 interacts with AXIN1, AXIN2, and DVL2, promoting the stabilization and nuclear accumulation of ??-catenin. Nuclear ??-catenin associates with TCF/LEF transcription factors to drive expression of target genes such as c-Myc, Cyclin D1, and AXIN2, which are critical for cell cycle progression and growth. DIXDC1 is itself transcriptionally regulated by the TCF/LEF complex, suggesting a feed-forward amplification loop. Additionally, DIXDC1 has been implicated in PI3K/Akt signaling, where it may interface with the regulatory subunit p85 to influence downstream effectors including GSK3?? and mTOR, thereby fostering cell survival and metabolic activity.
In the HeLa epithelial cancer model, endogenous DIXDC1 contributes to the sustained activation of Wnt/??-catenin and PI3K/Akt pathways that drive uncontrolled proliferation and invasive behavior. Disruption of DIXDC1 is expected to attenuate ??-catenin?Cdependent transcription and Akt-mediated survival signals, resulting in diminished cell growth, altered migration, and reduced colony formation. Because DIXDC1 has been linked to gastric, colorectal, and lung cancers, this knockout cell population offers a tractable system to dissect its oncogenic mechanisms. Beyond oncology, DIXDC1??s role in developmental Wnt signaling makes this model relevant for investigating the molecular basis of neural tube defects.
Researchers can employ the DIXDC1 knockout HeLa polyclonal cells in a variety of functional assays to probe Wnt/??-catenin and PI3K/Akt pathway activity. For example, Western blotting and immunofluorescence microscopy can assess changes in ??-catenin protein levels and localization, while TOP/FOP luciferase reporter assays quantify TCF/LEF transcriptional output. RT-qPCR enables measurement of target gene expression, and cell-based proliferation (MTT/BrdU) and transwell migration/invasion assays directly evaluate cancer cell phenotypes. This polyclonal population is particularly valuable for drug screening campaigns aimed at identifying Wnt pathway inhibitors that act downstream of ligand?Creceptor interactions. For additional information, technical support, or to place an order, please contact Ascent Research.
