The DNASE1L1 Knockout AGS Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the AGS human gastric adenocarcinoma epithelial cell line. This product features targeted disruption of the DNASE1L1 gene, which encodes a Ca2+/Mg2+-dependent endonuclease critically involved in DNA fragmentation during apoptosis. The polyclonal format provides a heterogeneous pool of edited cells, enabling robust loss-of-function studies without clonal selection artifacts. This knockout model serves as a valuable tool for investigating apoptotic DNA degradation pathways and their impact on gastric cancer cell biology.
The parental AGS cell line originates from a poorly differentiated, tumorigenic human gastric adenocarcinoma and is widely employed as a model system for gastric cancer research. These epithelial cells recapitulate key features of gastric carcinogenesis and are amenable to genetic manipulation, making them suitable for functional genomics applications. The AGS background provides a physiologically relevant context for examining the consequences of DNASE1L1 disruption within the cellular machinery of a gastric tumor origin.
DNASE1L1 functions as a downstream effector of the apoptotic cascade, where it mediates double-stranded DNA cleavage in a Ca2+/Mg2+-dependent manner. Its activity is regulated by p53-mediated DNA damage responses, pro-apoptotic cytokines, and death receptor signaling, converging on caspase-3 activation. Caspase-3 cleaves the inhibitor ICAD, releasing CAD to fragment DNA; DNASE1L1 cooperates with this pathway, interacting with Ca2+, Mg2+, DNA, and histones to promote chromatin condensation and oligonucleosomal fragmentation. Key upstream regulators include BAX, BCL2, cytochrome c, and APAF1, which govern mitochondrial outer membrane permeabilization and apoptosome formation. Thus, DNASE1L1 integrates signals from intrinsic and extrinsic apoptotic pathways to execute terminal DNA degradation.
In the AGS gastric adenocarcinoma context, knockout of DNASE1L1 is predicted to impair apoptotic DNA fragmentation, potentially conferring resistance to pro-apoptotic stimuli such as chemotherapeutic agents. This alteration may shift the balance toward cell survival, influencing tumorigenicity and treatment response. By eliminating a key nuclease, this model permits dissection of DNASE1L1-dependent versus -independent death mechanisms. Consequently, it enables the study of gastric cancer cell survival plasticity and the identification of compensatory pathways that may emerge upon loss of endonuclease activity.
The DNASE1L1 Knockout AGS Polyclonal Cells are designed for a broad spectrum of research applications, including apoptosis pathway analysis, DNA damage response profiling, and screening of chemosensitivity. Typical experimental workflows include Western blotting for cleaved caspase-3 and PARP, flow cytometry using Annexin V/PI staining, quantitative DNA fragmentation assays, and cell viability assessments by MTT or clonogenic assays. Additionally, transcriptomic analyses via RNA-seq can reveal global expression changes linked to DNASE1L1 loss. These studies advance understanding of gastric cancer biology and may inform therapeutic strategies targeting apoptotic vulnerabilities. For additional information or custom inquiries, please contact Ascent Research.
