The DTNBP1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the DTNBP1 gene in the human HAP1 cell line. This product provides a genetically heterogeneous pool of cells with targeted gene disruption, enabling loss-of-function studies without the need for clonal isolation. The polyclonal format preserves population-level diversity while abolishing functional dysbindin expression, making it suitable for various biochemical and cell-based assays.
HAP1 cells are a near-haploid human cell line derived from KBM-7 chronic myeloid leukemia cells, exhibiting an adherent, fibroblast-like morphology. Their haploid karyotype simplifies gene editing and enhances the penetrance of genetic modifications, establishing them as a widely used platform for functional genomics, genetic screening, and drug target discovery. The near-haploid nature reduces confounding effects of heterozygous mutations, offering a clean background for studying gene function.
DTNBP1 encodes dysbindin, a core component of the biogenesis of lysosome-related organelle complex 1 (BLOC-1). Dysbindin directly interacts with dystrobrevins and multiple BLOC-1 subunits such as BLOS1, BLOS2, muted, pallidin, and cappuccino, regulating lysosome biogenesis and intracellular trafficking. DTNBP1 functions downstream of DISC1 and is regulated by BDNF, WNT ligands, and dopamine signaling, while it influences the trafficking of dopamine D2 receptors, NMDA receptors, and SNARE complex proteins like SNAP25 and synapsin I. Through these molecular interactions, DTNBP1 modulates neurotransmitter secretion and synaptic plasticity, with crosstalk to Wnt/beta-catenin and Akt pathways.
Disruption of DTNBP1 in HAP1 cells impairs BLOC-1 complex assembly, leading to defects in lysosome-related organelle biogenesis and intracellular trafficking. This model recapitulates cellular phenotypes relevant to schizophrenia and Hermansky-Pudlak syndrome type 7, as it may alter neurotransmitter receptor trafficking and downstream signaling cascades. The near-haploid background enhances the knockout effect, providing a robust system for studying DTNBP1-dependent pathways and their interplay with DISC1, BDNF, and Wnt/beta-catenin networks. Researchers can probe the mechanistic links between lysosomal dysfunction and neuropsychiatric disorders using this engineered cell pool.
These DTNBP1 knockout polyclonal HAP1 cells are well-suited for schizophrenia disease modeling, lysosome biology studies, genetic interaction screens, and drug target validation. Typical assays include western blotting for protein expression analysis, immunofluorescence microscopy to visualize organelle distribution, RT-qPCR for transcriptional profiling, and lysosomal function assays to assess trafficking defects. Co-immunoprecipitation experiments can further elucidate dysbindin interactomes, while cell viability assays enable evaluation of stress responses. For additional details or to discuss custom applications, please contact Ascent Research.
