The KDM5C Knockout A-549 Polyclonal Cells comprise a heterogeneous population of A-549 lung epithelial cells with CRISPR/Cas9-mediated disruption of the KDM5C gene. This polyclonal knockout pool enables loss-of-function studies without clonal selection, providing a population-level view of KDM5C deficiency in a lung adenocarcinoma background. The CRISPR/Cas9 strategy introduces targeted genomic alterations in KDM5C, resulting in a mixed population of edited cells that lack functional protein expression.
The A-549 cell line is derived from a lung adenocarcinoma of a 58-year-old male and serves as a model for alveolar epithelial biology. These cells harbor a KRAS G12S mutation and wild-type p53, making them a valuable system for investigating oncogenic signaling and tumor suppression. A-549 cells are widely employed in studies of cancer cell proliferation, drug metabolism, and epithelial-to-mesenchymal transition. In the context of KDM5C knockout, this host provides a relevant platform to examine how histone demethylase activity impacts lung cancer progression and chromatin remodeling.
KDM5C (SMCX/JARID1C) is a H3K4me2/3-specific demethylase that acts as a transcriptional corepressor. It stably associates with REST, HDAC1, HDAC2, SIN3B, and NCOR1 to repress neuronal genes, and interacts with RB1 to regulate E2F-dependent transcription, thereby controlling cell cycle progression. Upstream regulators include MYC and REST, while downstream targets encompass CDKN1A, PTEN, SCN2A, GRIN2B, and HOX gene clusters. KDM5C functionally collaborates with KDM5B and integrates signals from the pRB/E2F pathway, directly influencing H3K4me3 levels at key promoters and shaping chromatin landscapes that govern differentiation and proliferation.
In A-549 lung adenocarcinoma cells, KDM5C knockout permits interrogation of H3K4me3 dynamics within oncogenic networks. Disruption of KDM5C-RB1 interactions may alter E2F target gene expression, affecting cell cycle control and response to CDK inhibitors. Moreover, loss of KDM5C-mediated REST/HDAC complex function can derepress neuronal genes, offering a model for epigenetic plasticity and potential lineage reprogramming. Given the enzyme??s relevance to renal cell carcinoma, breast cancer, and leukemia, this polyclonal knockout system provides a versatile tool to explore conserved and context-dependent roles of KDM5C in chromatin regulation and tumorigenesis.
Typical experimental applications include ChIP-seq for H3K4me3 profiling and RNA-seq to capture transcriptomic changes, with validation by western blotting and RT-qPCR for targets like CDKN1A and PTEN. Proliferation, migration, and drug sensitivity assays can assess functional consequences of KDM5C loss in lung adenocarcinoma. Additionally, this model supports neurodevelopmental disorder studies by enabling analysis of REST target gene derepression. For further information and customization, please contact Ascent Research.
