The BAG5 Knockout TE1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population with disruption of the BAG5 gene in the human TE1 esophageal squamous cell carcinoma line. This loss-of-function model enables investigation of BAG5-dependent processes without transient gene silencing, utilizing a diverse pool of edited alleles for robust phenotypic assessment.
TE1 cells originate from a poorly differentiated esophageal squamous cell carcinoma of male origin and are a widely used model for esophageal cancer research. Their aggressive growth characteristics and tumorigenic properties provide a relevant background for studying molecular drivers of carcinogenesis, metastasis, and drug resistance.
BAG5 is a co-chaperone that suppresses Hsp70/Hsc70 chaperone activity and Parkin-mediated mitophagy. It binds Hsp70/Hsc70 to impair protein refolding and associates with Bcl-2 to inhibit mitochondrial outer membrane permeabilization, preventing caspase-3 activation and apoptosis. BAG5 also blocks Parkin recruitment and PINK1 stabilization on mitochondria, reducing LC3B lipidation and autophagic clearance. Regulated by HSF1 and ATF6, BAG5 interacts with Hsp90, LRRK2, CHIP, DJ-1, and Synphilin-1, and modulates BAX/BAK-mediated pore formation, integrating protein quality control, mitochondrial integrity, and cell death pathways.
In the TE1 esophageal cancer model, BAG5 knockout enables dissection of its contribution to chemoresistance and tumor cell survival. Given BAG5??s anti-apoptotic and mitophagy-inhibitory functions, disruption is expected to sensitize cells to cisplatin and 5-fluorouracil, while impairing adaptive responses to proteotoxic stress. This polyclonal knockout population is particularly valuable for investigating how loss of BAG5 alters the interplay between chaperone networks and mitochondrial integrity in a poorly differentiated squamous carcinoma environment, providing a direct tool to assess effects on oncogenic signaling, metabolic reprogramming, and metastatic potential.
Researchers can utilize these polyclonal knockout cells in a range of experiments, including Western blotting for BAG5, Hsp70, and LC3B; RT-qPCR for mRNA quantification; immunofluorescence for LC3 puncta formation and Parkin redistribution; flow cytometry-based apoptosis measurements via Annexin V/PI staining; and co-immunoprecipitation to detect BAG5?CHsp70 interactions. Functional assays may incorporate MTT viability analysis, Seahorse metabolic profiling of mitochondrial respiration, and drug sensitivity panels with cisplatin or 5-FU. The knockout population is suitable for autophagy/mitophagy studies, apoptosis resistance mechanism characterization, esophageal cancer progression research, chemoresistance testing, and protein quality control investigations. For further information or to request technical support, please contact Ascent Research.
