The BAG3 Knockout HeLa Polyclonal Cells represent a CRISPR/Cas9-mediated polyclonal knockout population of HeLa cells with targeted disruption of the BAG3 gene. This loss-of-function model enables detailed functional analysis of BAG3, a stress-induced co-chaperone that integrates autophagy and apoptosis regulation.
HeLa cells are an immortalized human cervical adenocarcinoma epithelial line extensively used in cancer biology, autophagy, and apoptosis research. Their robust proliferation and well-mapped signaling pathways provide a consistent platform to interrogate BAG3-dependent mechanisms in a disease-relevant cellular background. The endogenous BAG3 expression in HeLa cells and its induction by proteotoxic stress make this host an appropriate system for studying its downstream effects.
BAG3 functions as a key co-chaperone linking Hsp70 to the autophagy-lysosome pathway, promoting the degradation of misfolded proteins through LC3 and p62/SQSTM1. It is transcriptionally induced by HSF1, NF-kB, and AP-1 in response to heat shock, oxidative stress, or proteotoxic insults. By forming complexes with Hsp70, HspB8, and 14-3-3, BAG3 facilitates autophagic clearance. Concurrently, BAG3 inhibits apoptosis by binding to Bcl-2, blocking Caspase-3 and Caspase-9 activation. This dual regulation positions BAG3 at a critical node for cellular stress adaptation and survival.
In the context of HeLa cervical carcinoma, BAG3-mediated cytoprotection likely contributes to tumor cell resilience against chemotherapeutics and hypoxia. Disruption of BAG3 using these polyclonal knockout cells is expected to impair autophagic flux and enhance apoptotic sensitivity, offering a tool to dissect its role in cancer cell maintenance and stress responses. Additionally, since BAG3 mutations are implicated in dilated cardiomyopathy and myofibrillar myopathy, this model provides insights into general proteostasis mechanisms and chaperone-assisted degradation pathways.
Typical applications include Western blotting and immunofluorescence for autophagy markers (LC3, p62), flow cytometry with Annexin V/PI to assess apoptosis, and co-immunoprecipitation to examine interactions with Hsp70 or Bcl-2. Cell viability and autophagy flux assays under proteotoxic stress can directly measure functional outcomes of BAG3 loss. These cells enable studies on drug resistance, synthetic lethality, and proteotoxic stress signaling in cervical cancer. For further details, contact Ascent Research.
