The BAG5 Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt BAG5 expression in the SK-HEP-1 human hepatic adenocarcinoma cell line. This loss-of-function model is generated by CRISPR/Cas9-mediated gene disruption, yielding a heterogeneous pool of edited cells suitable for functional studies where polyclonal populations are preferred over clonal isolates. The polyclonal format allows researchers to investigate BAG5-dependent processes in protein quality control without the confounding effects of single-cell clonal selection.
SK-HEP-1 is a well-established hepatocellular carcinoma (HCC) model derived from the ascitic fluid of a patient with liver adenocarcinoma. These epithelial cells exhibit robust proliferation, metastatic traits, and reproducible drug response profiles, making them a standard platform for cancer biology research. Integrating BAG5 knockout into this background enables the systematic study of how proteostasis networks intersect with liver cancer cell behavior, including migration, invasion, and therapeutic resistance.
BAG5 functions as a co-chaperone that negatively regulates the Hsp70 molecular chaperone cycle by inhibiting nucleotide exchange. It directly interacts with Hsp70 and Hsc70, and forms complexes with Parkin and the C-terminus of Hsp70-interacting protein (CHIP). Upstream, BAG5 expression is controlled by heat shock factor 1 (HSF1) and other stress-responsive transcription factors, linking chaperone capacity to cellular stress. Downstream, BAG5 modulates the folding and clearance of clients such as alpha-synuclein and tau, while also influencing CHIP-mediated ubiquitination. Consequently, BAG5 knockout disrupts Hsp70 nucleotide exchange, impairing protein quality control and altering the balance between apoptosis, autophagy, and proteasomal degradation.
In the hepatocellular carcinoma context, this model permits dissection of proteostasis-related survival mechanisms, such as apoptosis resistance and autophagy modulation. The established interaction between BAG5 and Parkin, and its role in handling alpha-synuclein, also bridges the model to Parkinson??s disease research. Thus, the BAG5 Knockout SK-HEP-1 cells provide a dual-use system for investigating proteotoxic stress pathways relevant to both liver cancer and neurodegeneration, enabling cross-disciplinary mechanistic studies.
Typical applications include Parkinson??s disease research, HCC investigations, proteostasis dysfunction analysis, and Hsp70 modulator screening. Representative assays encompass Western blotting for BAG5, RT-qPCR, Hsp70 ATPase activity measurements, caspase-3/7 apoptosis assays, LC3-II-based autophagy flux analysis, and cell viability, migration, and invasion assays. These can be adapted for high-throughput compound screening. For further technical information, custom orders, or experimental design support, please contact Ascent Research.
