The CAV2 Knockout K-562 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population in which the CAV2 gene has been disrupted within the K-562 suspension lymphoblastoid cell line. This heterogeneous knockout pool offers a loss-of-function model for studying caveolin-2-dependent signaling, adhesion, and drug responses in a leukemic background, without the biases of clonal selection. The polyclonal format maintains genetic diversity while eliminating CAV2 expression, providing a physiologically relevant tool for investigating caveolae-associated protein functions in oncogenic processes.
K-562 is a suspension lymphoblastoid cell line derived from the pleural effusion of a 53-year-old female with chronic myelogenous leukemia in terminal blast crisis. The cells carry the Philadelphia chromosome and express the BCR-ABL1 fusion oncoprotein, hallmarks of CML. Widely used as a model for erythroleukemia, differentiation, apoptosis, and drug resistance studies, K-562 cells provide a well-characterized signaling context, particularly downstream of BCR-ABL1, in which to assess the impact of CAV2 knockout.
CAV2 encodes a scaffolding protein that, in complex with CAV1 and CAV3, forms caveolar membrane microdomains enriched in cholesterol and sphingolipids. It is activated downstream of SRC family kinases, EGF, insulin, and integrin ligands (fibronectin, collagen). Within these platforms, CAV2 interacts with SRC, EGFR, integrins, and heterotrimeric G proteins, orchestrating signal transduction to ERK1/2, AKT, STAT3, Rho GTPases, and focal adhesion kinase. Consequently, CAV2 regulates caveolae-mediated endocytosis, integrin signaling, focal adhesion turnover, and EGFR/insulin signaling cascades, linking lipid raft dynamics to cell adhesion, migration, and proliferation.
In K-562 CML cells, CAV2-mediated scaffolding is critical for spatial control of signals driving adhesion-dependent survival and migration, processes that contribute to leukemia cell homing and imatinib resistance. Disruption of CAV2 in this polyclonal knockout population disorganizes caveolar signaling platforms, potentially altering integrin-mediated adhesion and BCR-ABL1-driven oncogenic signaling. This model thus permits dissection of CAV2??s role in drug sensitivity and the identification of caveolin-2-dependent vulnerabilities, with the polyclonal structure reflecting genetic heterogeneity observed in clinical disease.
These CAV2 knockout polyclonal K-562 cells support diverse experimental workflows, including western blotting, immunofluorescence, and flow cytometry to confirm CAV2 loss and assess signaling protein localization. Co-immunoprecipitation can map caveolar protein interactions, while functional assays such as cell adhesion on fibronectin or collagen, migration assays, and imatinib dose-response profiling reveal phenotypic consequences. Phospho-signaling analysis using antibodies against ERK1/2, AKT, STAT3, and FAK enables interrogation of pathway alterations upon EGF or integrin stimulation. This knockout resource thus facilitates mechanistic studies of caveolae-dependent signaling in leukemia and drug resistance. For further technical inquiries, please contact Ascent Research.
