The GPX1 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human A-549 lung adenocarcinoma epithelial cell line. This product offers a loss-of-function model for the glutathione peroxidase 1 (GPX1) gene, enabling researchers to dissect its role in oxidative stress defense, redox signaling, and ferroptosis. The polyclonal nature reflects a heterogeneous pool of cells with targeted disruption of the GPX1 gene, ensuring broad representation of editing outcomes without clonal selection.
The parental A-549 cell line is a widely used model of human lung adenocarcinoma, originally derived from a 58-year-old Caucasian male. These epithelial cells retain key characteristics of respiratory epithelium and are employed extensively in cancer biology and respiratory research. Their adherent growth and well-characterized molecular profile make them suitable for studying oncogenic signaling, drug responses, and cellular stress pathways. The A-549 line??s origin from a lung adenocarcinoma patient provides a clinically relevant context for investigating tumor suppressor and antioxidant mechanisms.
GPX1 encodes glutathione peroxidase 1, a selenoprotein that reduces hydrogen peroxide and organic hydroperoxides using glutathione (GSH). It is a principal antioxidant enzyme, protecting cells from oxidative damage. Expression is activated by NRF2 (NFE2L2) under oxidative stress and requires selenium for full activity. GPX1 cooperates with superoxide dismutase and catalase, and it interacts with selenium-binding protein 1. By lowering peroxide levels, GPX1 modulates redox-sensitive pathways such as NF-??B and MAPK/ERK and inhibits ferroptosis. This ferroptosis regulatory network includes GPX4, SLC7A11, and ACSL4. Accordingly, GPX1 knockout in A-549 cells is anticipated to increase reactive oxygen species (ROS), perturb glutathione metabolism, and sensitize cells to oxidative stress and ferroptosis induction.
In A-549 lung adenocarcinoma cells, which are exposed to high levels of reactive oxygen species due to rapid proliferation, GPX1 is critical for maintaining redox homeostasis. The knockout model allows researchers to assess the dependence of lung cancer cells on this peroxidase and to investigate mechanisms of resistance to oxidative stress-inducing therapies. The polyclonal nature of the population supports experiments measuring aggregate cellular responses, including clonogenic survival, migration assays, and transcriptional reprogramming under oxidative conditions.
This GPX1 knockout model is suitable for a range of assays: western blotting and RT-qPCR for gene disruption verification; ROS detection with probes such as DCFDA or MitoSOX; cell viability under H2O2 or ferroptosis inducers (e.g., erastin); and glutathione quantification. It enables research into oxidative stress, ferroptosis, redox signaling, and drug resistance, as well as transcriptomic profiling (RNA-seq). For additional information, contact Ascent Research.
