The DUSP6 Knockout HAP1 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt the DUSP6 gene in the near-haploid HAP1 cell line. This loss-of-function model enables the study of DUSP6-dependent regulation of MAPK/ERK signaling in a genetically tractable background. The polyclonal format provides a heterogeneous pool of cells with targeted gene disruption, suitable for population-based analyses.
HAP1 cells are a human near-haploid fibroblast-like cell line originally derived from the KBM-7 chronic myeloid leukemia line. Their haploid karyotype facilitates straightforward genetic manipulation and phenotypic analysis because only one allele needs to be targeted to achieve a complete knockout. HAP1 cells retain key signaling pathways, including MAPK/ERK, and are widely used as a model system for genetic screens, pathway dissection, and drug target validation.
DUSP6 encodes a dual-specificity MAP kinase phosphatase that selectively dephosphorylates the threonine and tyrosine residues in the activation loop of ERK1 (MAPK3) and ERK2 (MAPK1), thus inactivating these central kinases. This activity constitutes a critical negative feedback mechanism within the MAPK/ERK cascade, which is activated by upstream signals such as FGF and EGF through receptors, RAS, RAF, and MEK. DUSP6 expression is itself transcriptionally induced by ERK signaling via ETS transcription factors, forming a tight feedback loop that modulates signal duration and amplitude.
In HAP1 cells, disruption of DUSP6 is expected to relieve negative regulation of ERK1/2, resulting in sustained or enhanced MAPK/ERK pathway output. Because HAP1 cells maintain a near-haploid genome, the knockout phenotype is not masked by a second functional allele, allowing clear interpretation of DUSP6 loss on signaling dynamics, cell proliferation, and survival. This model is particularly valuable for investigating oncogenic RAS-ERK signaling, given the pathway??s frequent dysregulation in cancer and RASopathies.
The DUSP6 Knockout HAP1 Polyclonal Cells support a broad range of experimental applications, including quantitative analysis of ERK phosphorylation by western blotting, transcriptional profiling of pathway target genes via RT-qPCR, and functional assessment using ERK reporter assays or cell proliferation assays. Researchers can employ this model to study MAPK signaling dynamics, feedback control, drug resistance mechanisms, and the role of DUSP6 in development and disease. For technical support and further information, please contact Ascent Research.
