The ACTA1 Knockout Ca Ski Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt the ACTA1 gene in the human cervical carcinoma cell line Ca Ski. This product provides a versatile loss-of-function model for studying skeletal muscle alpha-actin in a non-muscle epithelial background, primarily serving as a negative control for actin-targeted CRISPR studies and enabling investigation of off-target effects. The polyclonal nature ensures a heterogeneous gene disruption across the population, reflecting the natural variation in CRISPR editing outcomes without selection for a single clone.
The Ca Ski host cell line is an epithelial cell model derived from a metastatic human cervical carcinoma to the small intestine. These cells stably harbor integrated human papillomavirus type 16 (HPV-16) genomes and are widely employed in cervical cancer research to study HPV-mediated oncogenesis, viral-host interactions, and metastatic mechanisms. Their adherent, epithelial phenotype provides a physiologically relevant system for examining cytoskeletal dynamics, cell adhesion, and migration in the context of cancer progression.
ACTA1 encodes skeletal muscle alpha-actin, a core component of sarcomeric thin filaments essential for muscle contraction. In non-muscle cells such as Ca Ski, endogenous expression is typically minimal, validating its use as a negative control in CRISPR experiments targeting other actin isoforms. However, the gene??s regulatory network includes muscle-specific transcription factors like MyoD, Myogenin, MEF2C, and SRF, which are upstream regulators, while downstream consequences involve actin filament polymerization, myosin binding, and sarcomere assembly. Key interacting partners comprise myosin heavy chain, tropomyosin, the troponin complex, alpha-actinin, and nebulin. Broader actin cytoskeleton signaling involves Rho GTPases (RhoA, Rac1, Cdc42) and effectors such as cofilin, profilin, and the Arp2/3 complex, which coordinate actin dynamics.
In the Ca Ski cervical cancer model, ACTA1 knockout provides a critical tool for distinguishing specific actin isoform functions. Since these cells rely on the actin cytoskeleton for processes including migration, invasion, and HPV E6/E7-mediated transformation, the knockout enables assessment of off-target activity in CRISPR screens and serves as a controlled background for studying the contributions of other cytoskeletal proteins. This model is particularly valuable for research on focal adhesion, integrin signaling, and the mechanical properties of metastatic cancer cells, where precise manipulation of actin networks is required.
Typical applications include genomic cleavage detection assays and Sanger sequencing to verify ACTA1 disruption, Western blotting to confirm loss of alpha-skeletal actin protein, and immunofluorescence for actin cytoskeleton integrity. Functional studies can employ Transwell migration/invasion assays to evaluate metastatic potential, MTS proliferation assays, Annexin V apoptosis detection, and qPCR to monitor HPV E6/E7 expression levels. Additionally, this cell population is suitable for testing cytoskeletal drugs. For further information, please contact Ascent Research.
