The DMTN Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the human DMTN gene in the HT29 colorectal adenocarcinoma cell line. This product provides a genetically heterogeneous pool of cells carrying targeted disruptions in the DMTN locus, enabling loss-of-function studies without clonal selection biases. The polyclonal format preserves cellular diversity while achieving gene-level knockout, making it suitable for experiments requiring population-level readouts under physiologically relevant conditions.
HT29 cells are a well-characterized human colorectal adenocarcinoma cell line originally isolated from a 44-year-old female patient. These adherent epithelial cells serve as a robust intestinal epithelial model, widely employed in colorectal cancer research, drug screening, and studies of epithelial barrier function. Their ability to differentiate under specific culture conditions further expands their utility in analyzing gastrointestinal biology and tumorigenic processes.
DMTN encodes dematin, an actin-binding protein that crosslinks actin filaments and anchors the spectrin-based membrane skeleton to the plasma membrane. Dematin is phosphorylated by cAMP-dependent protein kinase (PKA) and protein kinase C (PKC), and its activity is integrated into Rho GTPase signaling networks, functioning downstream of RHOA and RAC1. It directly interacts with spectrin, actin, adducin, protein 4.1, and glucose transporter 1 (SLC2A1) to organize the cortical cytoskeleton. Pathway analyses place dematin at a node connecting ABI1, WASF2, and the ARP2/3 complex, collectively regulating actin polymerization and membrane-cytoskeleton coupling. Knockout of DMTN disrupts this architectural framework, impairing actin stress fiber formation and destabilizing the spectrin?Cactin lattice.
In the HT29 adenocarcinoma background, loss of DMTN perturbs cytoskeletal integrity, leading to altered cell adhesion, reduced membrane mechanical stability, and aberrant migratory behavior. Given dematin??s role in linking the spectrin?Cactin network to adhesion complexes, this knockout model recapitulates molecular perturbations associated with colorectal cancer invasion and metastasis. Although DMTN mutations are classically linked to hereditary spherocytosis and hemolytic anemia in erythroid cells, studying its depletion in an epithelial cancer context provides insights into tumor cell plasticity, metastatic dissemination, and potential resistance mechanisms to cytoskeleton-targeting therapeutics.
This cell pool is ideally suited for quantitative migration and invasion assays, including wound?healing and transwell migration models, to evaluate the contribution of actin?membrane scaffolding to colorectal cancer aggressiveness. Researchers can employ immunofluorescence to visualize actin filament reorganization and focal adhesion dynamics, western blotting to assess dematin and phospho?cofilin levels, co?immunoprecipitation to confirm disrupted spectrin?Cdematin complexes, and flow cytometry to monitor cell surface adhesion molecules. Such experiments facilitate dissection of signaling inputs from Rho GTPases and upstream kinases, and allow preclinical testing of anti?metastatic compounds. For additional technical support or to request a sample, please contact Ascent Research.
