APOL1 Knockout A-549 Polyclonal Cells constitute a polyclonal population of human A-549 lung adenocarcinoma epithelial cells with CRISPR/Cas9-mediated disruption of the APOL1 gene. This heterogeneous knockout pool provides a loss-of-function model for studying APOL1-dependent processes without clonal selection. The knockout enables functional dissection of APOL1 biology in a disease-relevant epithelial context. Researchers can investigate consequences of APOL1 ablation on innate immune signaling, autophagy, and programmed cell death. The cells are supplied as a viable, ready-to-use polyclonal population for downstream assays.
The A-549 cell line was derived from the lung adenocarcinoma of a 58-year-old male. These cells exhibit alveolar Type II pneumocyte features, serving as a model for lung epithelial biology, surfactant production, and adenocarcinoma research. They retain epithelial morphology and express cytokeratins and surfactant proteins. A-549 cells are commonly used in studies of autophagy, apoptosis, and responses to inflammatory cytokines. The adherent line grows robustly in standard culture conditions, providing a reliable platform for genetic manipulation and functional assays. Its human origin and disease association make it valuable for translational research in pulmonary and systemic diseases.
APOL1 encodes apolipoprotein L1 (ApoL1), an innate immunity component with trypanolytic activity. It associates with HDL particles via apolipoprotein A1 and membrane phospholipids. In T. brucei, APOL1 forms lysosomal pores, causing osmotic lysis. In human cells, APOL1 is transcriptionally regulated by TNF-alpha and interferon-gamma through NF-kB and STAT1. APOL1 promotes autophagic flux and can induce mitochondrial permeabilization. Risk variants G1/G2 activate protein kinase R and the NLRP3 inflammasome, resulting in pyroptosis. Thus, APOL1 sits at the intersection of cell death, inflammation, and lipid metabolism.
In the A-549 context, APOL1 knockout allows dissection of cell-autonomous roles without systemic HDL. This model permits analysis of APOL1-dependent changes in autophagic flux, mitochondrial integrity, and inflammasome activation upon TNF-alpha/IFN-gamma stimulation. The A-549 background provides a tractable system to study APOL1-mediated ion channel activity and its impact on cellular homeostasis. Additionally, knockout cells can be used to explore APOL1?Cinnate immune signaling interplay in lung epithelium, with implications for extrapulmonary APOL1 disorders.
These cells support kidney disease modeling, APOL1 cytotoxicity studies, and drug screening for focal segmental glomerulosclerosis and HIV-associated nephropathy. They are also suited for innate immunity, trypanolysis, and autophagy-dependent cell death research. Key assays include Western blotting, RT-qPCR, immunofluorescence for autophagy markers, flow cytometry for apoptosis, trypanolysis assays, and mitochondrial membrane potential measurements. The model is suitable for high-content screening of APOL1 pathway modulators. For further inquiries and technical support, please contact Ascent Research.
