The ECE1 Knockout AGS Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population targeting the human ECE1 gene in the AGS gastric epithelial cell line. This gene-edited pool offers a genetically heterogeneous model with disrupted endothelin-converting enzyme 1 function, suitable for loss-of-function studies without the constraints of single-clone isolation. The polyclonal nature captures a wide range of editing outcomes, providing a more representative loss-of-function model for population-level analyses.
The parental AGS cell line was originally established from a human gastric adenocarcinoma and is extensively employed as a model system for gastric cancer biology. AGS cells retain epithelial characteristics and are used to dissect oncogenic signaling, drug responses, and tumor cell behavior. Their ease of culture and genetic tractability make them a preferred host for CRISPR-based editing to interrogate gene function in the context of gastric carcinogenesis.
ECE1 encodes a type II integral membrane metalloprotease that catalyzes the conversion of inactive big endothelin-1 (big ET-1) to the bioactive vasoactive peptide endothelin-1 (ET-1), a potent mitogen and vasoconstrictor. ET-1 signals through G-protein-coupled receptors EDNRA and EDNRB, activating downstream cascades including phospholipase C-mediated calcium mobilization, MAPK/ERK, PI3K/AKT, and NF-??B. ECE1 activity is regulated by stimuli such as TNF-??, TGF-??, hypoxia, and shear stress, and it also processes other peptides including bradykinin and substance P. By integrating these inputs, ECE1 plays a central role in peptide hormone processing and vascular tone regulation, linking it to cancer cell proliferation, migration, and survival.
In AGS gastric cancer cells, ECE1-mediated ET-1 production is implicated in autocrine and paracrine loops that promote tumor progression. ET-1 engagement of its receptors can enhance cell proliferation, inhibit apoptosis, and stimulate the tumor microenvironment through angiogenic and pro-inflammatory signals. Disruption of ECE1 in this model abolishes endogenous ET-1 generation, permitting detailed dissection of the endothelin axis in gastric tumorigenesis. This polyclonal knockout population is especially useful for assessing ECE1-dependent phenotypes in a genetically diverse context, avoiding artifacts that may arise from clonal variation.
This knockout model supports a wide range of functional genomics applications, including investigation of ET-1-dependent signaling pathways in gastric cancer. Researchers can perform western blot and RT-qPCR to confirm ECE1 ablation and downstream effector changes such as phospho-ERK, AKT, and NF-??B activation. ELISA for secreted ET-1 provides a direct readout of enzymatic disruption. Proliferation, migration, and invasion assays enable assessment of tumorigenic potential, while calcium mobilization and cell viability assays under ET-1 stimulation evaluate receptor-proximal signaling. RNA-seq profiling can reveal transcriptomic consequences of ECE1 loss. This tool is ideal for target validation in drug discovery focused on the endothelin system. For additional information, please contact Ascent Research.
