The DTNBP1 Knockout AGS Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population of AGS human gastric adenocarcinoma cells harboring targeted DTNBP1 gene disruption. This polyclonal knockout model provides a heterogeneous loss-of-function system for studying dysbindin-1, with a mixture of edited alleles that can be used in pooled genetic screens, bulk biochemical experiments, and functional genomics applications.
The parental AGS cell line, derived from a 54-year-old female gastric adenocarcinoma, exhibits adherent epithelial morphology and is widely employed in gastric cancer research. These cells retain key signaling pathways relevant to epithelial biology, offering a non-neuronal platform to investigate dysbindin-1 functions in endosomal trafficking and organelle biogenesis beyond its well-characterized roles in synaptic processes.
Dysbindin-1, encoded by DTNBP1, is a core subunit of the biogenesis of lysosome-related organelles complex 1 (BLOC-1). Within this complex, dysbindin-1 interacts with BLOC1S1, BLOC1S2, SNAPIN, MUTED, PLDN, dystrobrevin, and DISC1, facilitating cargo sorting and vesicle trafficking from early endosomes to lysosome-related organelles. Downstream of dopaminergic signaling and synaptic activity, dysbindin-1 modulates dopamine D2 receptor trafficking and synaptic vesicle clustering, while also regulating lysosomal enzyme delivery. These molecular interactions place dysbindin-1 at a critical intersection of endosomal sorting, synaptic vesicle dynamics, and neurotransmitter release pathways.
The DTNBP1 knockout in AGS epithelial cells enables dissection of BLOC-1-dependent trafficking mechanisms in a non-neuronal context. This model is particularly relevant for Hermansky-Pudlak syndrome type 7 research, as dysbindin-1 deficiency impairs lysosome-related organelle biogenesis. Additionally, the polyclonal knockout pool allows study of schizophrenia-associated cellular phenotypes??such as altered endosomal sorting and lysosomal function??in an experimentally tractable epithelial system where synaptic confounders are absent.
Representative applications include vesicle trafficking assays with labeled cargoes, immunofluorescence staining for BLOC-1 complex localization, LysoTracker-based lysosomal morphology analysis, and ultrastructural examination by electron microscopy. Standard validation methods such as western blotting and RT-qPCR confirm dysbindin-1 depletion. This polyclonal knockout resource is well-suited for functional complementation studies, protein interactome analyses, and high-content screening assays. For additional technical information or custom inquiries, please contact Ascent Research.
