The DUSP6 Knockout HEK293T Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population in which the DUSP6 gene has been disrupted, creating a loss-of-function model in the HEK293T human embryonic kidney cell line. The polyclonal format captures a range of genetic edits, avoiding clonal bias and providing a more representative model for functional studies. These cells are designed for investigating the role of DUSP6 in MAPK/ERK signaling, cancer biology, and drug resistance.
HEK293T cells are a widely used host line derived from human embryonic kidney tissue, immortalized by the SV40 large T-antigen to enable episomal plasmid replication. Renowned for high transfectability, they are routinely employed for transient protein expression and lentiviral production. The cells maintain an intact MAPK/ERK signaling cascade and respond vigorously to growth factor stimulation, making them an ideal platform for dissecting ERK pathway regulation through gene knockout.
DUSP6 is a dual-specificity phosphatase that dephosphorylates and inactivates ERK1/2 (MAPK3/1) at the conserved TEY motif, exerting negative feedback on the RTK-RAS-RAF-MEK-ERK axis. ERK activation by upstream signals such as EGF or FGF transcriptionally induces DUSP6; the phosphatase then directly binds ERK2 (MAPK1) and ERK1 (MAPK3) via a kinase-interaction motif, dephosphorylating them and attenuating phosphorylation of substrates like RSK, ELK1, and c-Fos. DUSP6??s function is modulated by scaffold proteins (e.g., KSR1) and importin-mediated nuclear translocation. Thus, DUSP6 acts as a critical timer that limits ERK signal duration and amplitude.
In HEK293T cells, DUSP6 knockout eliminates this feedback brake, leading to persistent ERK phosphorylation and enhanced downstream transcriptional responses. This perturbation alters cell proliferation, survival, and gene expression programs in response to mitogenic cues. The polyclonal population mitigates clonal variation, making it particularly suitable for quantitative studies of signaling kinetics and for high-throughput screening. Additionally, the HEK293T background permits facile re-introduction of DUSP6 constructs for rescue experiments and co-expression of reporters or other modifiers, deepening the analysis of ERK network dynamics.
Applications span mechanistic dissection of oncogenic ERK signaling in cancers such as melanoma, pancreatic, and non-small cell lung cancer, as well as congenital RASopathies including Noonan syndrome. The cells are ideal for Western blotting of p-ERK/total ERK, phospho-flow cytometry, RT-qPCR of ERK targets (e.g., DUSP5, SPRY4), immunofluorescence localization, and functional assays like MTT and colony formation. They also support functional genomics screens and transcriptomic profiling by RNA-seq. For further information, please reach out to Ascent Research.
