The DUOX1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population with targeted disruption of the DUOX1 gene. This heterogeneous pool avoids single-cell cloning, providing a knockout model that minimizes clonal artifacts while maintaining robust target-gene disruption. The polyclonal format is well-suited for experiments requiring genetic diversity, enabling assessment of loss-of-function phenotypes without the bias of monoclonality.
HAP1 is a near-haploid human cell line derived from the chronic myeloid leukemia (CML) cell line KBM-7. It features a stable near-haploid karyotype and adherent fibroblast-like morphology, offering a simplified genetic background for unambiguous genotype-phenotype correlations. HAP1 cells retain leukemic signaling characteristics, making them valuable for studying oxidative stress and kinase pathways. Their ease of culture and transfection supports functional genomics and drug screening applications.
DUOX1 encodes a calcium-dependent NADPH oxidase that generates extracellular hydrogen peroxide (H2O2). It is regulated by intracellular calcium, protein kinase C (PKC), epidermal growth factor (EGF), transforming growth factor-alpha (TGF-??), interleukins IL-4 and IL-13, and Toll-like receptor (TLR) ligands. DUOX1 requires the maturation factor DUOXA1 for function and interacts with E-cadherin, ??-catenin, and Src family kinases. DUOX1-derived H2O2 oxidatively activates EGFR and Src, leading to phosphorylation of downstream targets such as protein tyrosine phosphatases (PTPs), NF-??B, and MAPK/ERK. This signaling influences matrix metalloproteinase (MMP) activity, linking ROS to tissue remodeling, innate immunity, and epithelial homeostasis.
In the HAP1 leukemic background, DUOX1 knockout disrupts redox-sensitive signaling, enabling dissection of H2O2-mediated pathways in a CML context. Because HAP1 cells harbor dysregulated kinase activity, loss of DUOX1 uncouples upstream ROS from downstream NF-??B and MAPK cascades. This system facilitates investigation of how DUOX1-dependent oxidative signals modulate proliferation, survival, or differentiation of leukemic cells, and may reveal redox vulnerabilities relevant to therapeutic intervention.
Key applications include studying ROS-mediated signaling, host defense, and epithelial-to-mesenchymal transition. Typical assays involve western blotting and RT-qPCR for DUOX1, ROS detection with Amplex Red or DCFDA, phospho-kinase profiling, scratch wound healing for migration, drug sensitivity screening, and flow cytometry for apoptosis. Immunofluorescence can assess DUOX1 localization and E-cadherin interactions. This model is pertinent to respiratory disease, cancer, and drug discovery research. For more information, contact Ascent Research.
