Description

The NR4A1 Knockout HEK293T Cell Line is a targeted CRISPR/Cas9-edited knockout cell line that disrupts the NR4A1 locus, effectively ablating NR4A1 expression in HEK293T cells. This knockout model enables researchers to dissect NR4A1-specific functions in transcriptional control, apoptosis, and metabolic signaling, free from interference by endogenous NR4A1 activity.

HEK293T cells are a human embryonic kidney epithelial cell line that stably expresses the SV40 large T-antigen, facilitating high levels of transient transfection and protein expression. Their robust growth and extensive characterization make them a favored host for genetic perturbation studies, providing a reproducible platform for investigating gene function and cellular signaling.

NR4A1, an immediate-early orphan nuclear receptor, is rapidly induced by diverse stimuli such as growth factors, cytokines, cAMP, and calcium. Activation involves phosphorylation by ERK1/2, p38, and JNK upstream kinases. NR4A1 acts as a transcription factor, directly promoting expression of pro-apoptotic genes (BCL2L11/Bim, BNIP3L/NIX) and metabolic regulators (FBP1, PEPCK), while modulating inflammatory cytokines. It associates with coactivators p300/SRC-1 and corepressors NCoR/SMRT, and participates in heterodimer formation with RXR and functional interaction with PPAR??. Consequently, NR4A1 integrates signals from MAPK/ERK, PI3K/AKT, and Wnt/??-catenin pathways to effect downstream apoptosis and metabolic responses.

In HEK293T cells, NR4A1 knockout provides a clean background to dissect its involvement in stress-induced apoptosis and metabolic reprogramming. The well-studied MAPK and PI3K/AKT signaling competency of HEK293T cells allows researchers to precisely map NR4A1-dependent versus -independent events upon stimulation. This model is particularly valuable for examining mechanisms linking extracellular signals to mitochondrial apoptosis and for identifying NR4A1 transcriptional targets in a human epithelial context.

Typical applications include apoptosis analysis via flow cytometry coupled with caspase-3/7 activity assays, metabolic flux analysis to monitor changes in glucose utilization and mitochondrial respiration, and ChIP-qPCR or luciferase reporter assays to probe NR4A1 transcriptional activity and promoter occupancy. The knockout cell line is also suitable for investigating steroidogenic enzyme gene regulation, neuroprotective signaling, and cytokine-driven inflammatory responses, utilizing techniques such as RT-qPCR and western blotting. For additional technical details or assistance, please contact Ascent Research.