HSP90AB1 Knockout HeLa Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population derived from the HeLa cell line, in which the HSP90AB1 gene has been disrupted to create a loss-of-function model. This polyclonal format captures a heterogeneous pool of edited alleles, providing a population-level representation of HSP90AB1 knockout effects without clonal selection. The cells serve as a versatile tool for studying the constitutive Hsp90?? chaperone and its broad client network in a well-characterized human cancer background.
The host HeLa cell line originates from a human cervical epithelial adenocarcinoma and is positive for human papillomavirus type 18 (HPV18). These cells are extensively utilized as a model system for cervical cancer and general cancer biology, offering robust growth characteristics and a well-documented genetic landscape. Their transformed phenotype and reliance on oncogenic signaling pathways make them particularly suitable for investigating molecular chaperones that support malignant progression and drug response.
HSP90AB1 encodes the constitutively active Hsp90?? isoform, a molecular chaperone that facilitates the proper folding, stabilization, and activation of numerous client proteins. It functionally interacts with co-chaperones including HSP70, STIP1 (HOP), PTGES3 (p23), CDC37, AHSA1 (AHA1), and FKBP5. Hsp90?? is regulated by upstream factors such as HSF1, heat shock, oxidative stress, and growth factor signaling, and it directly modulates downstream targets like AKT1, RAF1, CDK4, estrogen receptor alpha (ER??), androgen receptor (AR), HIF1??, and p53. Through these interactions, HSP90AB1 integrates into pathways controlling protein folding, PI3K/AKT and MAPK/ERK signal transduction, cell cycle progression, and apoptosis.
In the HeLa cervical cancer context, HSP90AB1 knockout disrupts the stability and function of oncogenic client proteins, leading to impaired proliferation and survival. This model is particularly relevant given HeLa cell dependence on Hsp90 for maintaining active kinase signaling and steroid receptor activity. It enables dissection of Hsp90??-specific functions distinct from the stress-inducible Hsp90?? isoform, and it provides a platform to examine how loss of constitutive chaperone activity alters cellular stress responses and drug sensitivity in a HPV18-positive adenocarcinoma background.
Typical research applications include western blotting to confirm HSP90AB1 ablation and assess client protein levels, cell viability assays (MTT, BrdU) to evaluate growth dependency, and apoptosis assays (Annexin V) to measure cell death induction. The cells are well-suited for RT-qPCR profiling of downstream targets and co-immunoprecipitation experiments to map Hsp90 interactomes. Additionally, they can be used in reporter assays for steroid receptor transactivation and in dose-response studies with Hsp90 inhibitors such as geldanamycin and 17-AAG. For technical inquiries or to request a quote, please contact Ascent Research.
