The KRT5 Knockout Ca Ski Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Ca Ski cell line, designed for targeted disruption of the human KRT5 gene. This polyclonal pool provides a robust loss-of-function model for investigating the roles of type II keratin intermediate filament protein KRT5 in epithelial cell biology, without relying on monoclonal selection. The CRISPR/Cas9-mediated gene disruption in this population ensures broad representation of edited alleles, offering a practical approach for functional genomics studies in a disease-relevant cellular context.
The Ca Ski cell line is an adherent epithelial cell model established from a peritoneal metastasis of a human cervical epidermoid carcinoma. Ca Ski cells retain integrated human papillomavirus type 16 (HPV-16) sequences and are widely employed as a model for HPV-positive cervical squamous cell carcinoma. They faithfully recapitulate key aspects of epithelial biology, HPV-driven oncogenesis, and cervical cancer progression, making them an appropriate host for examining the contributions of keratin intermediate filament networks in malignant epithelial phenotypes.
KRT5 encodes a type II keratin that obligately heterodimerizes with KRT14 to assemble intermediate filaments, forming a critical structural scaffold in basal epithelial cells. KRT5 expression is transcriptionally regulated by TP63 and is responsive to EGFR, Notch, AP-1, and TGF-beta signaling pathways. Downstream, KRT5-containing filaments interact with desmoplakin, plakoglobin, and plakophilin to anchor to desmosomes, and with BPAG1 and plectin for hemidesmosome linkage. The filament network modulates focal adhesion turnover, cell migration speed, and epithelial sheet integrity, and its disruption impairs desmoplakin recruitment and keratinocyte differentiation marker expression.
In the context of Ca Ski cervical carcinoma cells, knockout of KRT5 provides a powerful system to dissect how intermediate filament disruption alters HPV-positive squamous carcinoma cell behavior. Because KRT5 expression is maintained in squamous cell carcinomas, including cervical, lung, and head and neck subtypes, this model enables exploration of cytoskeletal vulnerabilities in cancer. Loss of KRT5 may compromise mechanical resilience, migration, and invasion, while also affecting signaling through the PI3K-Akt pathway and epithelial-mesenchymal transition programs, thus informing potential therapeutic strategies targeting keratin-dependent processes.
Researchers can apply this knockout polyclonal pool to a wide range of investigations, including examination of keratin filament organization via immunofluorescence and electron microscopy, quantitative migration and invasion assays such as scratch wound healing and transwell migration, and co-immunoprecipitation of keratin complexes to map altered protein interactions. The model also supports drug sensitivity screens for compounds that exploit cytoskeletal weaknesses and transcriptomic profiling by RNA-seq to elucidate KRT5-dependent gene networks. These applications directly facilitate studies on HPV oncoprotein interplay with keratin networks and the role of KRT5 in cervical cancer progression. For further technical details or purchasing inquiries, please contact Ascent Research.
