ANK3 Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population in which the ANK3 gene has been disrupted to eliminate ankyrin-G expression. This loss-of-function model is generated in the HT29 human colorectal adenocarcinoma cell line, a widely used epithelial model. The polyclonal format provides a heterogeneous pool of edited cells, enabling population-based studies of gene function while avoiding clonal selection artifacts. This product is specifically designed for researchers investigating the multifaceted roles of ankyrin-G in epithelial cell biology, with emphasis on adherens junction architecture, polarity regulation, and barrier function.
The host HT29 cell line was originally derived from a human colorectal adenocarcinoma and is extensively employed as an intestinal epithelial model. These cells can undergo enterocyte-like differentiation, characterized by polarization, microvilli formation, and brush border enzyme expression, making them suitable for studies of epithelial differentiation and junctional assembly. Their epithelial origin and tumorigenic properties also render them a relevant platform for colorectal cancer research, particularly for dissecting mechanisms of tumor progression and metastasis within a defined cellular context.
ANK3 encodes ankyrin-G, a scaffold protein that anchors membrane proteins to the spectrin-actin cytoskeleton. In epithelial cells, ankyrin-G binds E-cadherin (CDH1) and the Na+/K+-ATPase ??1 subunit (ATP1A1), linking them through ??II-spectrin (SPTBN1) to the actin cytoskeleton (ACTB). This scaffolding stabilizes adherens junctions by associating with ??-catenin (CTNNB1) and ??-catenin (CTNNA1), and it maintains polarized sodium/potassium transport. ANK3 activity is regulated by Wnt signaling, CDK5 phosphorylation, and E-cadherin engagement. Knockout of ANK3 disrupts this anchoring, leading to impaired junction stability and altered epithelial polarity, which may compromise barrier function and promote a migratory phenotype.
In HT29 cells, ANK3 disruption creates a model to interrogate how loss of ankyrin-G impacts intestinal epithelial homeostasis. Because HT29 cells form polarized monolayers, the polyclonal knockout population enables quantitative assessment of barrier integrity via transepithelial electrical resistance (TEER) and permeability assays. Furthermore, the model reveals how junction destabilization influences E-cadherin/??-catenin signaling, a pathway frequently dysregulated in colorectal cancer. The potential for enhanced migratory behavior makes these cells useful for studying colorectal cancer metastasis and for testing compounds that aim to restore epithelial barrier function or impede EMT.
Primary applications include investigation of adherens junction dynamics, epithelial polarity regulation, and the role of ANK3 in Wnt/??-catenin signaling. Standard techniques such as Western blotting for E-cadherin and ??-catenin, immunofluorescence for ankyrin-G, confocal microscopy of F-actin, and co-immunoprecipitation of junctional complexes directly support these studies. Additional functional assays like wound healing, ??-catenin reporter assays, and TEER measurements further enable exploration of migratory and barrier phenotypes. These assets make the model valuable for colorectal cancer research and epithelial biology. For further information, please contact Ascent Research.
