The BAG5 Knockout Ca Ski Polyclonal Cells provide a CRISPR/Cas9-mediated polyclonal knockout cell population directed against the BAG5 locus in the Ca Ski human cervical carcinoma cell line. This polyclonal product consists of a heterogeneous mixture of cells carrying a spectrum of loss-of-function mutations introduced by gene editing, eliminating the need for single-cell cloning. The pooled format minimizes clonal artifacts and offers a more representative model for studying gene function within a population context, particularly suitable for exploring BAG5??s involvement in protein quality control, apoptosis suppression, and autophagy.
The Ca Ski host cell line is an adherent epithelial line isolated from a cervical squamous cell carcinoma metastasis. These cells are HPV-16 positive and retain expression of the viral oncoproteins E6 and E7, which abrogate p53 and Rb function, respectively. Ca Ski cells are extensively used to model HPV-driven cervical cancer progression, invasion, and therapeutic response, providing a pathophysiologically relevant system for investigating molecular mechanisms of tumor cell survival and drug resistance.
BAG5 functions as a critical co-chaperone and nucleotide exchange factor for the molecular chaperone Hsp70. It directs Hsp70 activity toward protein refolding or, in conjunction with the E3 ligase CHIP (STUB1), promotes ubiquitin-dependent degradation of misfolded substrates. Additionally, BAG5 inhibits apoptosis through direct stabilization of Bcl-2 and Bcl-xL, and stimulates autophagy and mitophagy via associations with Parkin and LC3. Upstream factors including endoplasmic reticulum stress, oxidative stress, p53, and NF-??B regulate BAG5 expression and activity. Knockout of BAG5 in Ca Ski cells is anticipated to disrupt these interconnected cytoprotective pathways, likely resulting in heightened susceptibility to proteotoxic insults, apoptotic triggers, and autophagic defects.
In the context of HPV-16-positive cervical carcinoma, BAG5 is thought to reinforce malignant cell fitness by buffering stress and preventing programmed cell death. The BAG5 knockout Ca Ski polyclonal cells enable detailed dissection of how this co-chaperone contributes to metastatic potential and resistance to standard chemotherapies such as cisplatin. This model facilitates investigation into the crosstalk between endoplasmic reticulum stress pathways, autophagy, and apoptosis, and may reveal targetable dependencies in the chaperone network for cervical cancer therapeutic development.
Representative experimental uses include chemosensitivity profiling with cell viability assays (MTT, CellTiter-Glo), apoptotic marker analysis by Western blotting (cleaved caspase-3, Bcl-2, Bcl-xL), and autophagy flux measurements via LC3 turnover. Co-immunoprecipitation assays can be employed to examine alterations in BAG5 interaction partners, such as Hsp70, CHIP, or Parkin. Flow cytometry enables cell cycle distribution analysis and Annexin V?Cbased apoptosis quantification. Combination studies with proteasome inhibitors or HSP90 antagonists further exploit the knockout to probe synthetic lethal interactions. For further technical details, please contact Ascent Research.
