The ASRGL1 Knockout KYSE-30 Polyclonal Cells are a CRISPR/Cas9-edited human polyclonal cell population featuring targeted disruption of the ASRGL1 gene within the KYSE-30 esophageal squamous cell carcinoma line. This polyclonal knockout model provides a heterogeneous loss-of-function system for studying ASRGL1-dependent processes without clonal selection artifacts.
The KYSE-30 cell line was established from a moderately differentiated esophageal squamous cell carcinoma obtained from a 64-year-old male. It serves as a widely used in vitro model for esophageal cancer research, retaining key characteristics of squamous cell carcinoma and supporting studies on tumor biology, drug response, and metabolic regulation.
ASRGL1 encodes an intracellular L-asparaginase that hydrolyzes L-asparagine into L-aspartate and ammonia, directly modulating asparagine pools and influencing downstream metabolic and signaling networks. This catalytic activity intersects with the GCN2-eIF2??-ATF4 stress response pathway, where asparagine deprivation stimulates GCN2 kinase phosphorylation of eIF2??, leading to ATF4-mediated transcriptional reprogramming. ASRGL1 activity also regulates mTORC1 signaling, with consequences for cell cycle progression, apoptosis, and amino acid sensing. Additionally, functional interactions with asparagine synthetase help coordinate intracellular aspartate and asparagine levels, positioning ASRGL1 at a critical node in amino acid metabolism.
In esophageal squamous cell carcinoma, ASRGL1 deletion offers a relevant model to dissect metabolic vulnerabilities specific to this cancer type. KYSE-30 cells expressing wild-type ASRGL1 are adapted to maintain asparagine homeostasis; knockout of ASRGL1 disrupts this balance, potentially sensitizing cells to asparagine depletion and altering mTORC1-driven growth signals. This system enables the study of tumor cell adaptation to nutrient stress and provides a platform to assess synthetic lethalities and therapeutic strategies targeting amino acid metabolism in solid tumors.
Researchers can utilize these polyclonal knockout cells for a broad array of functional assays, including cell proliferation and colony formation assays, apoptosis detection by annexin V/PI staining, and metabolic profiling via LC-MS to track aspartate and asparagine fluctuations. Western blotting analyses for phosphorylated mTOR, GCN2, eIF2??, and ATF4, coupled with RT-qPCR stress gene expression panels, facilitate pathway interrogation. Drug sensitivity assays with chemotherapeutic agents enable investigations into asparaginase resistance and combined treatment modalities. For additional information, please contact Ascent Research.
