The DST Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population featuring targeted disruption of the DST gene in the A-549 human lung carcinoma cell line. This loss-of-function model is generated through CRISPR/Cas9-mediated gene disruption, yielding a heterogeneous pool of cells with DST deficiency without clonal selection. The polyclonal format preserves population complexity and is suitable for studies requiring pooled knockout cells, avoiding clonal artifacts. Supplied as a polyclonal cell population for direct experimental use.
The host cell line A-549, derived from human lung adenocarcinoma, is a well-established model of human alveolar type II epithelium. It retains epithelial characteristics including tight junctions and surface features of type II pneumocytes, making it ideal for lung cancer biology, drug response, and barrier function studies. The A-549 background is particularly relevant for investigating mechanisms of lung cancer metastasis and epithelial-to-mesenchymal transition due to its tumor origin and genetic manipulability.
DST encodes dystonin, a large cytoskeletal linker protein that maintains cellular integrity by connecting intermediate filaments to actin and desmosomal complexes. Dystonin interacts with actin, keratin 5/14, desmoplakin, integrin ??4, and plectin. Its activity is regulated by integrin-mediated adhesion and ECM stiffness, and it participates in EGFR signaling as a downstream mediator of EGFR ligands. DST deficiency disrupts the cytoskeletal network, impairing cell adhesion, barrier function, migration, and mechanical stress signaling. Consequently, the DST knockout model enables dissection of pathways involving focal adhesion dynamics, actin cytoskeleton organization, and EGFR signaling modulation.
In A-549 lung cancer cells, DST inactivation likely perturbs the balance between adhesion and motility, critical for cancer invasion and metastasis. The loss of dystonin-mediated mechanical coupling may heighten responses to microenvironmental mechanical cues and influence epithelial-to-mesenchymal transition. Additionally, due to DST’s link with EGFR signaling, this knockout model can be used to explore cross-talk between cytoskeletal integrity and growth factor signaling, potentially identifying drug resistance vulnerabilities. Thus, these polyclonal knockout cells provide a valuable tool for lung adenocarcinoma research.
This product supports diverse applications: investigating cell adhesion mechanisms via quantitative adhesion assays and immunofluorescence for cytoskeletal organization; studying mechanical stress responses using substrate stiffness modulation with RNA-seq transcriptome analysis; and assessing cancer metastasis through scratch wound migration assays and flow cytometry for integrin expression. Additional applications include drug resistance studies using EGFR phospho-analysis and EMT investigations with barrier integrity assays. For further details, please contact Ascent Research.
