The EFNA5 Knockout HeLa Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population from the human HeLa cell line, engineered to ablate EFNA5 gene function. This loss-of-function model consists of a heterogeneous pool of cells harboring targeted disruptions, generated via CRISPR/Cas9-mediated genome editing, thus capturing diverse genetic edits. It serves as a robust tool for studying EFNA5-dependent processes, avoiding selection bias inherent to monoclonal lines.
The host HeLa cell line is an immortalized epithelial model from a cervical adenocarcinoma, characterized by HPV-18 positivity, which inactivates p53 and activates telomerase, enabling unlimited proliferation. Its widespread use in cancer biology, signal transduction, and drug discovery research makes it an apt system for exploring EFNA5 function.
EFNA5 encodes ephrin-A5, a glycosylphosphatidylinositol (GPI)-anchored ligand for Eph receptor tyrosine kinases, principally EphA4 and EphB2. Binding triggers bidirectional signaling: forward through Eph receptors engages SRC, FAK, and GRB2, activating MAPK/ERK (MAPK1/3) and PI3K/AKT cascades, while Rho family GTPases RhoA and Rac1 regulate actin dynamics. Reverse signaling via the GPI anchor also modulates cellular responses. EFNA5 expression is regulated by p53, NF-??B, and Wnt/??-catenin, and its interaction with ADAM10 and integrins fine-tunes adhesion and migration.
Disruption of EFNA5 in HeLa cells derails Ephrin-Eph signaling, potentially impairing cytoskeletal reorganization and cell adhesion driven by RhoA and Rac1. In the p53-deficient, telomerase-active HeLa background, ephrin-A5 loss may alter metastatic behaviors, providing a relevant model for investigating cancer cell motility. The perturbation of downstream effectors like ERK1/2 and AKT further underpins studies on proliferation and survival signaling.
Researchers can employ RT-qPCR and Western blotting to confirm EFNA5 mRNA and protein knockdown, immunofluorescence to assess morphological changes, and migration/invasion assays to quantify functional outcomes. Co-immunoprecipitation with EphA4 or EphB2, phospho-Eph receptor western blot, and RNA-seq facilitate in-depth pathway analysis. This polyclonal knockout cell pool is applicable to cancer metastasis, angiogenesis, and neuronal guidance studies. To obtain more details or discuss customization, please contact Ascent Research.
