Description

The G3bp1 Knockout AML12 Cell Line is a CRISPR/Cas9-edited knockout cell line derived from the AML12 murine hepatocyte line, engineered to disrupt the G3bp1 gene. This cell-based knockout model provides a stable loss-of-function system for investigating the roles of G3bp1 in stress granule dynamics, mRNA regulation, and Ras signaling in a hepatocyte context.

AML12 is a non-transformed mouse hepatocyte cell line originally isolated from transgenic mice overexpressing human transforming growth factor alpha (TGF-??). As immortalized liver parenchymal cells, AML12 cells retain key hepatocyte features, including metabolic activity, detoxification capacity, and protein synthesis functions, making them a widely used model for liver biology, hepatocellular carcinoma research, and drug metabolism studies. This background provides a physiologically relevant platform for studying G3bp1 function in hepatic stress responses and disease pathology.

G3bp1 (Ras GTPase-activating protein-binding protein 1) is an RNA-binding protein that serves as a central nucleator of stress granules??cytoplasmic ribonucleoprotein aggregates formed in response to cellular stress. Under stress conditions such as heat shock, oxidative stress, or arsenite exposure, G3bp1 oligomerizes and recruits key components including Caprin-1, USP10, TIA-1, and PABP1, thereby regulating mRNA stability and translation. G3bp1 also interacts directly with RasGAP, modulating Ras signaling cascades and influencing cell proliferation and survival. Its activity is regulated by upstream factors including FAK and PKR-mediated phosphorylation, and it controls downstream targets such as p53 and the NF-??B pathway, integrating stress sensing with cell fate decisions.

In the hepatic context, G3bp1 plays critical roles in liver pathophysiology. Hepatocytes are routinely exposed to metabolic, oxidative, and chemical stressors; dysregulated stress granule formation and impaired mRNA control contribute to liver diseases such as cancer, steatosis, and viral hepatitis. The AML12 G3bp1 knockout model enables dissecting how loss of G3bp1 alters stress responses, Ras-driven proliferative signaling, and innate immune pathways in liver cells. This model is particularly relevant for studying mechanisms of hepatocellular carcinoma, drug resistance, and liver-specific viral-host interactions, where G3bp1 has been implicated in modulating viral replication and cellular antiviral defenses.

Researchers can employ this knockout cell line in a wide range of assays. Immunofluorescence microscopy allows direct visualization of stress granule dynamics and composition; western blotting confirms G3BP1 protein absence and assesses downstream signaling changes; RT-qPCR and RNA immunoprecipitation (RIP) enable analysis of specific mRNA targets and interactions; polysome profiling reveals translational regulation; and cell viability assays under stress conditions evaluate functional consequences. These applications support studies in cancer biology, neurodegeneration, and infectious disease, wherever G3bp1-mediated stress responses and signaling networks are relevant. For further technical specifications and ordering details, please contact Ascent Research.