The DUSP10 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HEK293T cell line, designed to disrupt the DUSP10 gene encoding dual specificity phosphatase 10 (MKP-5). This loss-of-function model enables the investigation of stress-activated signaling pathways without the potential clonal biases associated with single-cell-derived knockout lines. These cells are well-suited for functional assays aimed at elucidating the molecular mechanisms of MAPK signal termination and cellular stress responses.
HEK293T cells are a widely used derivative of the HEK293 human embryonic kidney epithelial cell line, stably expressing the SV40 large T antigen, which enhances episomal plasmid replication and confers high transfection efficiency. They are extensively employed for recombinant protein production, lentiviral packaging, and genetic manipulation studies due to their robust growth and compatibility with diverse experimental protocols. Their epithelial origin and well-characterized signaling networks make them a valuable host for investigating MAPK pathway components, particularly the JNK and p38 cascades directly regulated by DUSP10.
DUSP10 encodes MKP-5, a dual-specificity phosphatase that selectively dephosphorylates threonine and tyrosine residues within the activation loop of the stress-activated kinases JNK1 (MAPK8), JNK2 (MAPK9), and p38?? (MAPK14), leading to their inactivation. DUSP10 expression is induced by upstream stimuli including pro-inflammatory cytokines (IL-1??, TNF-??), oxidative stress, UV irradiation, and osmotic shock. By attenuating JNK and p38 activity, DUSP10 modulates the function of transcription factors such as AP-1, ELK1, and ATF2, thereby controlling gene expression programs involved in apoptosis, proliferation, and inflammation. Upstream MAP2Ks and MAP3Ks relay activating signals to these kinases, and DUSP10 provides critical negative feedback to maintain signaling homeostasis.
In HEK293T cells, knockout of DUSP10 enables precise dissection of its specific role in terminating MAPK signals, as these cells retain functional JNK and p38 pathways responsive to stress stimuli. This model allows the study of altered signal duration, amplitude, and downstream transcriptional outputs upon DUSP10 loss. The polyclonal nature of the knockout population captures a spectrum of genetic perturbations, revealing diverse cellular adaptations and avoiding clonal artifacts. Consequently, these cells are highly relevant for research into cancer cell survival, inflammatory signaling, and drug resistance, where dysregulation of stress-activated kinases is a common feature.
These polyclonal knockout cells support a broad range of applications. Key methods include western blotting for phospho-JNK and phospho-p38 following cytokine stimulation, RT-qPCR for DUSP10 target genes, and luciferase reporter assays for AP-1 activity. Flow cytometry with Annexin V/PI staining quantifies apoptosis, MTT or BrdU assays measure proliferation, and immunofluorescence microscopy monitors MAPK nuclear translocation. Phospho-signaling antibody arrays enable network profiling. These approaches facilitate detailed studies of stress signaling, inflammation, and metabolism. For details, contact Ascent Research.
