The DNMBP Knockout NCI-H1299 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the NCI-H1299 non-small cell lung cancer cell line, featuring targeted disruption of the DNMBP gene. This heterogeneous knockout pool provides a loss-of-function model to study the scaffold protein DNMBP (Tuba) and its role in actin cytoskeleton regulation and cell junction integrity. The polyclonal format preserves population diversity, enabling robust functional genomics studies without clonal bias and minimizing artifacts associated with single-cell cloning.
The host cell line, NCI-H1299, is an epithelial cell line originally established from the lymph node metastasis of a 43-year-old male with lung adenocarcinoma. These cells serve as a well-characterized in vitro model for non-small cell lung cancer (NSCLC), exhibiting invasive and migratory properties relevant to metastasis research. NCI-H1299 cells are widely employed in studies of cancer cell motility, adhesion, and drug response, and their genetic background??including p53 deficiency??makes them a valuable platform for exploring tumor suppressor pathways and oncogenic signaling.
DNMBP functions as a critical scaffold protein that couples Cdc42 GTPase signaling to actin polymerization at cell junctions and endocytic sites. Mechanistically, DNMBP is activated by Cdc42 and Src kinases downstream of integrin adhesion complexes, where it recruits and organizes N-WASP and the WAVE complex to promote Arp2/3-mediated actin filament branching. Additionally, DNMBP interacts with dynamin and adherens junction core components such as E-cadherin and ??-catenin, thereby coordinating membrane trafficking with the stabilization of cell?Ccell contacts. Its multifunctional nature positions DNMBP at a nexus of cell junction organization, Rho GTPase signaling, and clathrin-mediated endocytosis.
In the context of NCI-H1299 NSCLC cells, DNMBP knockout is expected to profoundly disrupt actin cytoskeleton dynamics and compromise the integrity of adherens junctions. Loss of DNMBP-dependent actin remodeling impairs the formation and maintenance of epithelial cell?Ccell contacts, leading to enhanced migratory and invasive phenotypes reminiscent of epithelial-mesenchymal transition. This model therefore offers a physiologically relevant system to dissect the contribution of junctional actin scaffolds to NSCLC progression and metastasis, and it provides a tool to validate DNMBP as a potential therapeutic target in lung cancer.
These polyclonal knockout cells are ideally suited for a range of advanced research applications, including the mechanistic study of cell junction biology, quantitative analysis of 2D and 3D cancer cell migration, and transwell invasion assays. The model enables western blotting for DNMBP and associated junction proteins, immunofluorescence visualization of filamentous actin and E-cadherin distribution, and co-immunoprecipitation of DNMBP with binding partners such as dynamin or Cdc42. Moreover, the polyclonal population is amenable to high-throughput screening for small-molecule modulators of the actin cytoskeleton and to CRISPR-based rescue experiments. For further information or technical assistance, please contact Ascent Research.
