The HIP1R Knockout HT29 Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal population of HT29 cells with targeted disruption of the HIP1R gene. HIP1R encodes an endocytic adaptor linking clathrin coats to the actin cytoskeleton, and its ablation in this model permits loss-of-function studies. The polyclonal nature maintains heterogeneous editing across the population, avoiding single-cell clonal selection and providing a robust system for gene function analysis in a colorectal epithelial background.
The parental HT29 cell line originates from a human colorectal adenocarcinoma and is extensively utilized as an epithelial model in cancer biology and intestinal physiology. HT29 cells exhibit an adherent epithelial morphology and can undergo differentiation to display absorptive and mucus-secreting properties under specific culture conditions. This makes them particularly valuable for studies of intestinal barrier function, polarized transport, and oncogenic signaling. The cell line??s well-characterized signaling networks and genetic tractability render it a versatile host for targeted gene disruption and subsequent phenotypic analysis.
HIP1R functions as a key adaptor in clathrin-mediated endocytosis, linking clathrin coats to dynamic actin filaments. It interacts with clathrin, actin, cortactin, and HIP1 to coordinate vesicle formation and trafficking. Activated by growth factor stimulation and cell adhesion signals, HIP1R facilitates internalization of receptors such as EGFR into clathrin-coated pits. The endocytic cascade downstream involves AP-2, dynamin-mediated scission, and actin polymerization, which govern receptor endocytosis and subsequent signaling. Disruption of HIP1R in the knockout model abrogates efficient EGFR internalization, leading to altered receptor trafficking and potential rewiring of downstream pathways controlling cell proliferation and migration.
In HT29 colorectal cancer cells, HIP1R knockout serves as a tool to dissect the interplay between endocytic trafficking and oncogenic signaling. Perturbed receptor internalization is a cancer hallmark, and disrupted HIP1R enables study of how impaired EGFR trafficking impacts actin remodeling and downstream cascades. The intestinal epithelial origin of HT29 also permits investigation of barrier integrity, cell polarity, and drug uptake, with implications for drug delivery and resistance. Given the role of clathrin-mediated endocytosis in nutrient and drug absorption, this model is valuable for pharmacological studies in a colonic epithelial context. The polyclonal population reflects heterogeneous gene disruption, mimicking variegated loss in tumors.
Researchers can employ this knockout model for transferrin and EGFR internalization assays to quantify endocytosis, immunofluorescence for clathrin and actin, and Western blotting to confirm HIP1R loss. Functional studies including cell migration and proliferation assays elucidate consequences on malignant behaviors. Additional applications encompass drug uptake studies and analysis of actin dynamics in clathrin-dependent processes. For technical details, pricing, and availability, please contact Ascent Research.
