The DTNBP1 Knockout Huh-7 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population derived from human hepatocellular carcinoma Huh-7 cells, featuring targeted disruption of the DTNBP1 gene. This loss-of-function model abolishes dysbindin protein expression, enabling the study of BLOC-1 complex?Cdependent lysosomal and organelle trafficking. The polyclonal pool provides a heterogeneous knockout background suitable for rapid phenotypic screening without single-cell cloning.
Huh-7 cells, an epithelial line from a 57-year-old male hepatocellular carcinoma, serve as a premier model for hepatic metabolism, hepatitis C virus replication, and liver cancer research. Their well-characterized signaling and robust growth facilitate gene editing studies to unravel liver-specific roles of trafficking machinery.
Dysbindin, encoded by DTNBP1, is a core BLOC-1 subunit that mediates endosomal?Clysosomal trafficking. It interacts with BLOC1S1, BLOC1S2, BLOC1S3, MUTED, PLDN, CNO, SNAPIN, and dystrobrevins DTNA/DTNB. Transcriptionally regulated by SP1 and NF-Y, dysbindin directs lysosomal hydrolases (cathepsin D, beta-hexosaminidase) and melanosomal proteins (TYR, TYRP1) to their destinations. BLOC-1 cooperates with AP-3 and HOPS complexes; its disruption causes defective lysosomal secretion, autophagy impairment, and endosomal sorting defects, underlying Hermansky-Pudlak syndrome type 7 and schizophrenia-associated trafficking pathology.
Knockout in Huh-7 cells creates a liver-specific model to examine BLOC-1 function in lysosomal biogenesis and autophagy, processes vital for hepatocellular homeostasis. This system permits investigation of dysbindin??s impact on lysosomal enzyme activity, autophagic flux, and viral infection mechanisms, such as hepatitis C virus entry. Moreover, it allows exploration of schizophrenia-relevant membrane trafficking deficits in a non-neuronal context, broadening mechanistic insights across tissue types.
Typical applications include lysosomal trafficking studies via western blotting (DTNBP1, LAMP1, LC3-II), RT-qPCR for lysosomal gene expression, immunofluorescence for LAMP2 and cathepsin D, enzyme activity assays, LysoTracker staining, and autophagy flux analysis using chloroquine. Additional techniques include co-immunoprecipitation for BLOC-1 complex integrity, cell migration/invasion assays, and transmission electron microscopy for lysosomal ultrastructure. This knockout model is ideal for Hermansky-Pudlak syndrome research, schizophrenia-associated pathway analysis, liver-specific BLOC-1 functional studies, and drug screening for lysosomal storage disorders. For detailed specifications and technical support, please contact Ascent Research.
