The APH1A Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the human A-549 lung carcinoma epithelial cell line. This product enables targeted disruption of the APH1A gene, a critical subunit of the ??-secretase complex. The polyclonal nature of the knockout pool provides a heterogeneous editing landscape, offering a robust loss-of-function model suitable for functional genomics and signaling studies without the need for clonal isolation.
The A-549 cell line originates from a human male lung adenocarcinoma and is a standard in vitro model for alveolar type II epithelium. These adherent epithelial cells retain characteristics relevant to lung cancer biology, including dysregulated growth signaling. Their well-characterized background makes them ideal for dissecting molecular mechanisms in lung adenocarcinoma and for evaluating therapeutic strategies, providing a reproducible platform for gene knockout experiments.
APH1A is a core component of the ??-secretase complex, which includes PSEN1, NCSTN, PSENEN, and PSEN2, and mediates intramembrane cleavage of type I transmembrane proteins such as APP and Notch. APH1A is essential for complex assembly and proteolytic activity. CRISPR/Cas9-mediated gene disruption impairs ??-secretase function, reducing APP processing and amyloid-?? generation, and attenuating Notch receptor cleavage and NICD release. Downstream, Notch signaling via RBPJ and targets like CD44 and E-cadherin is compromised. APH1A expression is transcriptionally regulated by SP1, and knockout also affects processing of substrates like ERBB4, impacting multiple signaling cascades.
In A-549 lung cancer cells, APH1A knockout disrupts Notch-dependent oncogenic processes, as Notch signaling is often aberrantly activated in non-small cell lung cancer and contributes to proliferation, migration, and EMT. This polyclonal knockout model enables examination of heterogeneous gene disruption effects and their impact on tumor cell behavior, including changes in morphology, motility, and invasion. It provides a valuable tool for studying the role of ??-secretase in maintaining the malignant phenotype and for identifying downstream effectors critical for lung adenocarcinoma progression.
This product supports diverse research applications, including functional analysis of ??-secretase, mechanistic studies of Notch signaling in lung cancer, Alzheimer??s disease modeling, and screening of ??-secretase inhibitors. Assays such as Western blotting, RT-qPCR, ??-secretase activity measurement, Notch reporter assays, NICD immunofluorescence, migration assays, and RNA-seq are readily performed. For product inquiries and ordering, please contact Ascent Research.
