The BCL2L11 Knockout Ca Ski Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population designed to disrupt the BCL2L11 gene (encoding BIM) in the human Ca Ski cervical carcinoma line. This loss-of-function model enables rigorous investigation of intrinsic apoptosis and cell survival mechanisms without clonal bias, serving as a valuable tool for studying BIM-dependent signaling networks and therapeutic responses in an HPV-positive context.
The Ca Ski host cell line is a well-characterized HPV-16-positive cervical epidermoid carcinoma model, extensively used for studying cervical cancer biology, HPV oncoprotein interactions, and drug sensitivity. It retains functional p53 and Rb pathways modulated by viral E6 and E7 proteins, providing a physiologically relevant epithelial background. Combining this line with BCL2L11 knockout allows precise dissection of BIM??s role in HPV-driven carcinogenesis and chemoresistance.
BIM is a sentinel pro-apoptotic BH3-only protein that transduces diverse stress signals??including cytokine withdrawal, DNA damage, and glucocorticoid exposure??to the intrinsic apoptotic pathway. It is transcriptionally regulated by FOXO3a and TP53, and post-translationally controlled via ERK-mediated phosphorylation and proteasomal degradation. BIM neutralizes anti-apoptotic BCL-2 family members (BCL-2, BCL-XL, MCL-1) to liberate BAX and BAK, which oligomerize at mitochondria to release cytochrome c. Cytochrome c triggers Apaf-1-mediated activation of caspase-9 and executioner caspases-3/7. BIM also interacts with DYNLL1, linking apoptosis to cytoskeletal dynamics, and its disruption therefore severs critical pro-apoptotic signaling.
In the Ca Ski cervical cancer model, BIM loss is predicted to confer resistance to intrinsic apoptosis, complementing the anti-apoptotic effects of HPV E6/E7 on p53 and Rb. This polyclonal knockout enables investigation of cooperative oncogenesis, synthetic lethal interactions, and sensitivity to BH3 mimetics like ABT-199 and navitoclax, which target BCL-2/BCL-XL. It thus provides an ideal platform for drug response studies and resistance mechanism exploration.
Applications include Western blotting for BIM, Annexin V apoptosis assays, caspase-3/7 activity measurements, CellTiter-Glo viability assays, BH3 profiling, cytochrome c release assays, colony formation, and chemo/BH3 mimetic sensitivity testing. This polyclonal knockout model supports detailed investigation of BIM??s tumor-suppressive functions in cervical cancer. For more information, contact Ascent Research.
