The JAG1 Knockout HeLa Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HeLa cell line, featuring targeted disruption of the JAG1 gene. This gene encodes Jagged-1, a transmembrane ligand that activates Notch receptors on adjacent cells. The polyclonal population retains a heterogeneous mixture of edited alleles, providing a robust model for studying loss-of-function phenotypes in a human cervical cancer background. By eliminating Jagged-1 expression, the cells enable investigation of Notch signaling dependency without the need for clonal isolation, facilitating large-scale functional genomics and pathway dissection.
HeLa cells are an immortalized human epithelial cell line originally derived from a cervical adenocarcinoma. Their extensive characterization, rapid proliferation, and experimental tractability make them a cornerstone of biomedical research. As a model for cervical cancer, HeLa cells exhibit deregulated signaling networks, including Notch pathway components. The JAG1 Knockout HeLa Polyclonal Cells maintain the epithelial morphology and growth characteristics of the parental line while lacking functional Jagged-1, allowing researchers to directly assess the contribution of this ligand to the malignant phenotype in a well-defined genetic background.
JAG1-encoded Jagged-1 is a type I cell-surface protein that engages Notch receptors (NOTCH1, NOTCH2, NOTCH3) through specific EGF-like repeats. Ligand-receptor binding triggers sequential proteolytic processing by ADAM10 or ADAM17 metalloproteases and the gamma-secretase complex (PSEN1/2), releasing the NOTCH intracellular domain (NICD). NICD translocates to the nucleus, where it associates with the transcriptional repressor RBPJ and coactivators such as MAML1 to form an active transcription complex. This complex drives expression of basic helix-loop-helix repressors HES1, HEY1, and HEY2, as well as MYC, CCND1, and CDKN1A, which regulate cell proliferation, differentiation, and apoptosis. JAG1 expression is itself positively regulated by NICD, creating a feedback loop, and is induced by upstream factors including TGFB1, HIF1A, and the MAPK/ERK pathway.
In the context of HeLa cervical carcinoma cells, Jagged-1-mediated Notch signaling contributes to oncogenic processes such as sustained proliferation, epithelial-mesenchymal transition, and chemoresistance. CRISPR-mediated disruption of JAG1 in this polyclonal pool ablates the ligand??s function, thereby preventing trans-activation of Notch receptors on neighboring cells and impeding downstream target gene transcription. Consequently, the JAG1 Knockout HeLa Polyclonal Cells serve as a powerful tool to dissect Jagged-1-specific versus global Notch pathway contributions. This model allows for the evaluation of how loss of Jagged-1 influences cell cycle progression, survival, and migration, and may attenuate tumorigenic properties, providing a platform for identifying vulnerabilities in Notch-dependent cancers.
This polyclonal knockout cell product is well-suited for a variety of downstream assays. Researchers can examine Notch signaling activity by RT-qPCR analysis of HES1 and HEY1 transcript levels or western blot detection of NICD accumulation. Proliferation can be measured using MTT or CTG assays, while cell migration is assessed through scratch wound or transwell migration assays. Apoptosis induction can be quantified via annexin V staining, and flow cytometry enables cell cycle profiling. Application areas span Notch pathway dissection, cancer cell biology, cell fate determination, and drug target validation. For technical information or custom requests, please contact Ascent Research.
