The GPNMB Knockout KYSE-150 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human KYSE-150 esophageal squamous cell carcinoma cell line. This product is engineered for loss-of-function studies of the GPNMB gene, which encodes a transmembrane glycoprotein implicated in cell adhesion, migration, and tumor progression. The polyclonal format provides a heterogeneous pool of cells with targeted disruption of the GPNMB locus, enabling robust functional analyses while avoiding clonal artifacts. This knockout model is supplied as a mixed population, facilitating versatile experimental designs in cancer biology research.
The host KYSE-150 cell line originates from an esophageal squamous cell carcinoma of a Japanese male patient and serves as a well-established epithelial cancer model. KYSE-150 cells retain hallmark characteristics of esophageal squamous cell carcinoma, including aggressive growth and invasive potential, making this line highly suitable for studying molecular mechanisms underlying esophageal cancer pathogenesis. The genetic background of KYSE-150 provides a relevant context for interrogating GPNMB function, given the gene??s reported involvement in esophageal squamous cell carcinoma progression and metastasis.
GPNMB functions as a transmembrane glycoprotein that mediates cellular interactions with the extracellular matrix and neighboring cells. It acts downstream of transcriptional regulators such as MITF and TGF-??, and its expression is modulated by EGFR signaling. Mechanistically, GPNMB interacts with integrin ??1 (ITGB1), CD44, and heparan sulfate proteoglycans (HSPG), facilitating activation of the PI3K/AKT and MAPK/ERK cascades. This signaling converges on downstream effectors including AKT1, MTOR, RAF1, MAP2K1 (MEK1), and MAPK1 (ERK2), culminating in the upregulation of matrix metalloproteinases MMP2 and MMP9 and the transcription factor SNAI1 (Snail). Consequently, GPNMB potentiates cell migration, invasion, and epithelial-mesenchymal transition, key processes in tumor dissemination.
In the KYSE-150 esophageal squamous cell carcinoma context, GPNMB knockout provides a powerful tool to dissect tumor-intrinsic signaling dependencies. Aberrant GPNMB expression correlates with enhanced invasiveness and poor prognosis in multiple cancers, including melanoma, breast cancer, glioblastoma, and esophageal squamous cell carcinoma. By eliminating GPNMB function, researchers can examine alterations in PI3K/AKT and MAPK/ERK pathway activity, integrin-mediated adhesion, and TGF-??-driven EMT programs. This model enables the identification of GPNMB-specific contributions to tumor cell behavior, metastatic potential, and responses to therapeutic interventions, revealing vulnerabilities that may be exploitable for targeted therapy.
This polyclonal knockout cell population supports a wide range of experimental workflows. Typical applications include Western blotting and RT-qPCR to confirm pathway modulation, Transwell migration and invasion assays to assess metastatic capacity, and MTT proliferation assays to evaluate growth kinetics. Flow cytometry and Annexin V apoptosis assays enable analysis of cell death pathways, while luciferase reporter assays probe transcriptional activities of GPNMB-regulated genes. Co-immunoprecipitation studies can verify protein-protein interactions with partners such as ITGB1 or CD44. Researchers may also employ these cells to investigate drug sensitivity and resistance or to explore immunomodulatory functions in co-culture systems. For further information, please contact Ascent Research.
