The BAZ2B Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung carcinoma line, providing a loss-of-function model for the BAZ2B gene. BAZ2B encodes a chromatin remodeling factor involved in epigenetic silencing and transcriptional regulation. The polyclonal format offers a heterogeneous mixture of mutant cells without clonal isolation, suitable for robust functional studies. This tool is designed for research into chromatin organization, rRNA gene silencing, and cancer biology.
The A-549 cell line is a hypotriploid human lung carcinoma epithelial line from a 58-year-old male, widely used as a model for lung adenocarcinoma. These adherent cells are well characterized for oncogenic signaling and drug response studies, offering a cancer-relevant background to examine BAZ2B disruption. The line??s pulmonary origin makes it particularly apt for probing epigenetic mechanisms linked to lung tumor biology.
BAZ2B functions in chromatin remodeling complexes to silence ribosomal RNA genes. It binds rDNA loci and recruits histone deacetylase HDAC1 and DNA methyltransferase DNMT1, establishing repressive heterochromatin through histone deacetylation and DNA methylation. BAZ2B interacts with the chromatin remodeler SNF2H and the paralog BAZ2A to form multi-subunit complexes. Downstream targets include rRNA genes, heterochromatic loci, and cell proliferation genes, while upstream regulation may involve growth factor signaling. The pathway integrates BAZ2B, SNF2H, histone deacetylases, and DNA methyltransferases to exert transcriptional repression.
In A-549 lung adenocarcinoma cells, BAZ2B-mediated silencing of rDNA is thought to regulate ribosome biogenesis and cell growth. CRISPR/Cas9-mediated disruption of BAZ2B can derepress rRNA transcription, potentially altering nucleolar integrity and protein synthesis. This knockout model thus enables dissection of epigenetic control over cancer cell proliferation and may reveal sensitivities to therapies targeting ribosomal machinery or chromatin modifiers.
Applications span investigation of epigenetic silencing mechanisms, functional lung cancer studies, ribosomal RNA biology, and high-throughput screening for chromatin remodeling modulators. Assays include Western blotting for BAZ2B and rRNA markers, RT-qPCR for pre-rRNA, ChIP-qPCR for histone modifications at rDNA, immunofluorescence for nucleolar structure, proliferation assays (MTT/BrdU), and RNA-seq transcriptome profiling. These polyclonal knockout cells support both mechanistic and translational research. For further information, contact Ascent Research.
