The BAG3 Knouckout SK-HEP-1 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population in which the BAG3 gene has been disrupted. As a polyclonal pool, it offers a heterogeneous loss-of-function model that avoids clonal selection bias and better represents the genetic diversity of the original cell line. This format is ideal for pooled functional screens and for studies where phenotypic variability is an important parameter, ensuring robust and reproducible results in cancer research applications.
The host cell line SK-HEP-1 is a human hepatic adenocarcinoma line originally derived from ascitic fluid and frequently used as a model for hepatocellular carcinoma. It exhibits a mixed endothelial?Cepithelial phenotype, making it suitable for investigating tumor microenvironment interactions, metastatic behavior, and angiogenic signaling. SK-HEP-1 retains key oncogenic pathways and is widely employed in drug-response and signaling studies, providing a clinically relevant context for examining BAG3-dependent mechanisms in liver cancer.
BAG3 encodes a co-chaperone that binds to Hsp70 (HSPA1A) and coordinates autophagy, apoptosis, and proteostasis. Under stress, transcriptional activation by HSF1 and NF-??B increases BAG3 expression, which then promotes macroautophagy by bridging Hsp70?Cclient protein complexes to p62/SQSTM1 and facilitating LC3-II-mediated autophagosome formation. BAG3 also inhibits apoptosis by modulating caspase-3/9 activity and Bcl-2 family proteins, and it stabilizes LATS1/2 to regulate YAP/TAZ phosphorylation and nuclear translocation. Additional interactions with HspB8, CHIP/STUB1, and 14-3-3 proteins fine-tune these pathways. In cancer, BAG3 overexpression drives cell survival and proliferation through autophagy enhancement and Hippo pathway modulation.
In hepatocellular carcinoma, BAG3 upregulation is associated with advanced disease and chemoresistance. Disrupting BAG3 in SK-HEP-1 cells thus enables detailed analysis of autophagy-dependent survival mechanisms and Hippo pathway crosstalk in a liver cancer setting. The polyclonal knockout pool allows assessment of functional heterogeneity in stress responses, drug sensitivity, and migration, revealing vulnerabilities that may be overlooked in clonal populations. This model is particularly suited for dissecting the interplay between autophagy and the YAP/TAZ transcriptional programs underlying tumor progression.
This product supports a range of assays including western blotting for LC3-II and p62 to monitor autophagic flux, immunofluorescence to assess YAP/TAZ localization, caspase-3 activity assays for apoptosis, Annexin V/PI flow cytometry, and Boyden chamber migration assays. Applications include investigating autophagy-dependent drug resistance, identifying synthetic lethal partners, and studying Hippo pathway feedback loops in HCC. For technical inquiries, please contact Ascent Research.
