The ARHGEF1 Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population targeting the ARHGEF1 gene in the HT29 colorectal adenocarcinoma cell line. This loss-of-function model disrupts p115-RhoGEF expression, creating a heterogeneous knockout pool suitable for functional studies of RhoA signaling without clonal selection. The polyclonal format retains genetic diversity, enabling robust phenotypic screening and pathway analysis.
HT29 cells, derived from a 44-year-old Caucasian female with colon adenocarcinoma, are a well-characterized human colorectal adenocarcinoma model. They exhibit epithelial morphology and maintain hallmarks such as mucin secretion and polarized monolayer formation. Widely used in cancer research, these cells serve as a standard system for studying intestinal epithelial barrier function, tumorigenesis, and drug responses, providing a clinically relevant background for gene disruption.
ARHGEF1 encodes p115-RhoGEF, a guanine nucleotide exchange factor that specifically activates RhoA. It links G??12/13-coupled GPCRs??stimulated by ligands such as thrombin, LPA, and S1P??to RhoA-mediated cytoskeletal remodeling. Downstream, RhoA activates ROCK, leading to MLC phosphorylation and actomyosin contraction, and mDia, promoting actin polymerization. ARHGEF1 also interacts with focal adhesion components, including FAK, paxillin, and Src, integrating adhesion and mechanical signals. Through RhoA, it regulates stress fiber formation, focal adhesion assembly, and transcription via MRTF/SRF and YAP/TAZ, thereby controlling cell migration, adhesion, and proliferation.
In HT29 cells, ARHGEF1 is critical for actin cytoskeletal organization and cell-matrix adhesion, processes often aberrant in colorectal cancer. Disruption of ARHGEF1 impairs RhoA-driven contractility and adhesion dynamics, making this model valuable for dissecting mechanisms of EMT, invasion, and metastasis. The knockout cells enable investigation of how loss of p115-RhoGEF alters epithelial barrier function and response to mechanical cues, shedding light on its role in colorectal adenocarcinoma progression.
These cells are ideal for colorectal cancer metastasis studies, cell migration and invasion assays (e.g., transwell, scratch wound), and RhoA pathway analysis via western blotting of phospho-MLC and ROCK substrates. Applications also include immunofluorescence for focal adhesions, 3D organoid culture, drug sensitivity screening, and co-immunoprecipitation of ARHGEF1 interaction partners. For additional information, please contact Ascent Research.
