The ART1 Knockout 143B Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population, generated from the 143B osteosarcoma cell line, with targeted disruption of the ART1 gene. This loss-of-function model provides a powerful system for probing the roles of mono-ADP-ribosyltransferase 1 in key oncogenic processes, including cell adhesion, migration, and metastasis. As a polyclonal population, the product avoids the selection bias inherent in clonal isolates, thereby reflecting a more heterogeneous and physiologically relevant genetic context for functional studies.
The host 143B cell line is derived from a human osteosarcoma and is noted for its exceptional tumorigenicity and metastatic propensity in murine xenograft models. Widely employed in cancer research, 143B cells faithfully recapitulate aggressive bone tumor characteristics, such as rapid growth, invasion, and pulmonary colonization, making them an ideal background for investigating molecular drivers of osteosarcoma dissemination.
ART1 encodes a GPI-anchored ecto-enzyme that transfers ADP-ribose from NAD+ to arginine residues on cell surface proteins, most notably integrin beta-1 and integrin alpha-7. This modification regulates integrin activation and downstream signaling through focal adhesion kinase (FAK) and the small GTPase RhoA, thereby controlling adhesion and cytoskeletal dynamics. ART1 expression is stimulated by the inflammatory cytokines IFNG and TNF via the transcription factors STAT1 and NF-??B, positioning the enzyme at a nexus between immune signaling, NAD+ metabolism, and integrin-mediated cell-matrix interactions.
Loss of ART1 function in the 143B background is predicted to disrupt integrin-dependent adhesion and impair migratory and invasive capacity, potentially limiting metastatic spread. This knockout model is particularly suited to dissect how extracellular mono-ADP-ribosylation influences tumor cell crosstalk with the microenvironment, immune evasion, and formation of metastatic niches, all within a polyclonal framework that mimics tumoral heterogeneity.
Key applications include confirmatory Western blotting for ART1 protein, Transwell migration and invasion assays, quantitative cell adhesion assays, immunofluorescence microscopy to assess integrin localization, and flow cytometry for surface ART1 detection. The cells are also valuable for in vivo mouse xenograft metastasis assays and for screening pharmacological modulators of ART1 activity. For additional technical data or assistance, please contact Ascent Research.
