The ANXA2 Knockout HeLa Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population derived from HeLa human cervical adenocarcinoma cells, in which the ANXA2 gene has been disrupted. This polyclonal knockout format provides a heterogeneous loss-of-function model that avoids the artifacts of single-cell cloning while capturing the natural variability of the HeLa background. It is an ideal choice for researchers requiring a pooled knockout resource for high-throughput screening or population-level functional studies.
HeLa cells are a widely used immortalized line from cervical adenocarcinoma, characterized by aggressive growth, invasiveness, and permissiveness to viral infection. Their epithelial origin and transformed phenotype make them a relevant model for studying cell adhesion, migration, and matrix remodeling??processes directly influenced by ANXA2. Here, the knockout context enables dissection of ANXA2-dependent mechanisms in a tumorigenic setting.
ANXA2 encodes a calcium-dependent phospholipid-binding protein that scaffolds plasminogen activation on the cell surface. By forming a heterotetrameric complex with S100A10 (p11), ANXA2 recruits both plasminogen and tissue plasminogen activator (tPA), facilitating plasmin generation. Plasmin then activates matrix metalloproteinases (MMPs), leading to extracellular matrix degradation essential for cell invasion. ANXA2 function is regulated by Src-mediated phosphorylation at Tyr23, which controls its membrane localization and interaction with actin. Upstream, EGF, STAT3, HIF1A, and TNF-?? induce ANXA2 expression, while downstream targets include the Rho GTPase and PI3K/AKT pathways, linking extracellular proteolysis to cytoskeletal reorganization and survival signaling. The ANXA2?CS100A10 complex also interacts with integrins and actin, integrating adhesion with motility.
In HeLa cervical adenocarcinoma cells, ANXA2-driven proteolysis is critical for pericellular matrix degradation, promoting tumor cell migration and invasion. Knockout of ANXA2 thus disrupts these metastatic traits, offering a model to study epithelial-to-mesenchymal transition and cancer dissemination. Beyond oncology, this cell system is relevant for investigating thrombotic disorders, due to ANXA2??s role in fibrinolysis, and for exploring viral entry mechanisms, as ANXA2 facilitates infection by several viruses.
Researchers can employ this polyclonal knockout population across diverse assays: transwell migration and invasion assays to assess metastatic potential; plasmin activity measurements; Western blot and immunofluorescence for protein expression and localization; co-immunoprecipitation to probe ANXA2?CS100A10 interactions; RT-qPCR to quantify downstream gene expression changes; membrane repair kinetics using laser wounding; and viral entry reporter assays. These applications make it a versatile platform for mechanistic studies and drug discovery. For further information, contact Ascent Research.
