The ACTA2 Knockout DLD-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from human DLD-1 colorectal adenocarcinoma cells, providing a loss-of-function model for the ACTA2 gene. This population, generated without single-cell cloning, enables robust functional studies while preserving biological variability, ideal for dissecting alpha-smooth muscle actin (??-SMA)-dependent processes in colorectal cancer research.
DLD-1 is a well-characterized human colorectal adenocarcinoma cell line extensively used in cancer research to study oncogenic signaling, metastasis, and therapeutic responses. As an adherent epithelial model, it retains key features of intestinal epithelium and provides a pertinent system for assessing how ACTA2 knockout impacts malignant phenotypes such as migration, invasion, and cytoskeletal reorganization.
ACTA2 encodes alpha-smooth muscle actin, a major cytoskeletal protein that polymerizes into filamentous actin essential for cell contraction, motility, and structural integrity. Its expression is tightly regulated by the transforming growth factor-beta (TGF-??) pathway: ligand binding to TGF-?? receptors leads to Smad2/3 phosphorylation, which forms complexes with serum response factor (SRF) and the myocardin coactivator to drive ACTA2 transcription. Additional upstream regulators include mechanical stress and RhoA/ROCK signaling. Downstream, ??-SMA incorporates into actin stress fibers and focal adhesions, where it interacts with myosin, tropomyosin, calponin, vinculin, and talin to coordinate contractile force generation and matrix remodeling. This molecular network positions ACTA2 at the convergence of cytoskeletal dynamics and TGF-??-mediated myofibroblast differentiation.
In DLD-1 colorectal adenocarcinoma cells, ACTA2 knockout serves as a powerful tool for dissecting epithelial-mesenchymal transition (EMT) and the activation of cancer-associated fibroblasts. TGF-??-induced upregulation of ACTA2 drives acquisition of a contractile, mesenchymal phenotype, promoting tumor cell invasion and stromal remodeling. Disruption of ACTA2 allows researchers to isolate its specific contributions to actin stress fiber formation, focal adhesion assembly, and motility, while also clarifying crosstalk with the TGF-??/Smad pathway. This model holds direct relevance to colorectal cancer progression, tissue fibrosis, and vascular smooth muscle disorders such as thoracic aortic aneurysms.
Typical applications include quantitative migration and invasion assays (wound healing and transwell), analysis of EMT markers by RT-qPCR and western blotting, and visualization of actin cytoskeleton reorganization via immunofluorescence. The cells are well suited for TGF-?? stimulation experiments coupled with phospho-Smad2/3 detection, collagen gel contraction studies to assess contractility, and drug screening campaigns targeting the TGF-??/FAK/paxillin signaling axis. These polyclonal knockout cells provide a versatile platform for detailed molecular and functional investigation of ACTA2 in colorectal adenocarcinoma. For further technical information, please contact Ascent Research.
