The DNAH5 Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the HT29 human colorectal adenocarcinoma cell line. This loss-of-function model disrupts DNAH5, abrogating functional protein expression for investigations into its role in epithelial cell biology. The polyclonal format offers a heterogeneous cell pool, enabling robust, population-level analysis of DNAH5-dependent phenotypes without single-cell clone bias. It is optimized for reproducible experiments in ciliary biology and disease modeling.
HT29 cells, isolated from a primary tumor in a 44-year-old female, serve as a classical intestinal epithelial model with both enterocytic and mucin-secreting capabilities. These cells readily form polarized monolayers with tight junctions and apical secretion, making them ideal for studying barrier integrity, mucin production, and epithelial transport. Under differentiation conditions, HT29 cells can express motile cilia-associated factors, allowing the study of mucociliary clearance mechanisms in an intestinal context.
DNAH5 encodes a heavy chain of outer dynein arms, motor complexes that hydrolyze ATP to drive ciliary bending. Its expression is transcriptionally regulated by FOXJ1 and RFX factors, key drivers of multiciliogenesis downstream of Notch inhibition and E2F4. DNAH5 forms complexes with axonemal dynein components including DNAI1, DNAI2, DNAL1, CCDC114, and CCDC151, which are essential for dynein assembly and ciliary motility. Knockout of DNAH5 leads to reduced ciliary beat frequency, impaired mucociliary transport, and compromised epithelial defense against pathogens.
In the HT29 intestinal epithelial backdrop, DNAH5 knockout provides a platform to examine ciliary motor function in a cell type capable of mucin secretion and ciliated differentiation. This model is particularly relevant for primary ciliary dyskinesia research, as it allows dissection of DNAH5??s role in luminal clearance and surface liquid homeostasis beyond the respiratory tract. It facilitates comparative studies of ciliopathy phenotypes in gastrointestinal epithelia, which are often overlooked but may contribute to disease manifestations.
Researchers can employ high-speed video microscopy for ciliary beat frequency analysis, immunofluorescence for dynein complex localization, and mucociliary clearance assays to quantify transport function. Complementary techniques such as Western blotting, RT-qPCR, and RNA sequencing enable validation of knockout and transcriptomic profiling. These cells are also suited for therapeutic screening and genetic rescue experiments targeting dynein motor deficits. For additional technical information or assistance, please contact Ascent Research.
