The EIF2A Knockout Huh-7 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Huh-7 human hepatocellular carcinoma cell line. These polyclonal cells carry a disruption of the EIF2A gene, which encodes a GTP-independent translation initiation factor. The gene-edited pool provides a heterogeneous loss-of-function model suitable for studying EIF2A-dependent processes without clonal selection bias.
The Huh-7 cell line originates from a well-differentiated hepatocellular carcinoma of a male patient and retains epithelial characteristics of hepatic origin. This line is widely used in liver cancer biology, drug metabolism, and stress response studies. The hepatic epithelial background allows investigation of EIF2A??s role in hepatocyte-specific stress adaptation and tumor suppression mechanisms relevant to hepatocellular carcinoma.
EIF2A functions as a non-canonical translation initiation factor that promotes GTP-independent binding of initiator tRNA to the 40S ribosomal subunit under stress conditions that inhibit canonical eIF2-dependent initiation. It acts downstream of stress-sensing kinases including EIF2AK1/HRI, EIF2AK2/PKR, EIF2AK3/PERK, and EIF2AK4/GCN2, which are activated by stimuli such as oxidative stress, amino acid deprivation, ER stress, and viral infection. Through its interaction with the eIF3 complex, eIF1, eIF5, and the initiator tRNA, EIF2A facilitates the translation of stress-responsive mRNAs, notably ATF4, a transcription factor controlling the integrated stress response. This alternative initiation pathway operates in parallel with the eIF2??-ATF4-CHOP axis, and its disruption allows dissection of the balance between canonical and non-canonical translation initiation under stress.
In hepatocellular carcinoma, aberrant translation control contributes to tumorigenesis, metabolic reprogramming, and stress resistance. EIF2A has been implicated in tumor suppression, and its knockout in Huh-7 cells provides a valuable model to examine how loss of alternative initiation alters cell survival, proliferation, and stress adaptation in a liver cancer context. The polyclonal population captures diverse editing events and enables studies on the collective impact of EIF2A disruption without clonal variation confounders that can arise from monoclonal cell lines.
This product is ideally suited for investigating translation regulation under ER stress, amino acid starvation, or oxidative challenge. Researchers can employ western blotting to assess EIF2A, ATF4, and phospho-eIF2?? (Ser51) levels; RT-qPCR for stress target genes; polysome profiling for translational changes; and dual-luciferase uORF reporter assays to directly measure alternative initiation activity. The cells are also compatible with co-immunoprecipitation studies of ribosomal complexes, RNA-seq-based translational profiling, cell viability assays under stress, and clonogenic survival analyses. These applications support mechanistic studies and drug target evaluation in hepatocellular carcinoma. For further information, please contact Ascent Research.
