The GRSF1 Knockout HeLa Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the GRSF1 gene in HeLa epithelial cells. This product offers a stable loss-of-function model for studying GRSF1, an RNA-binding protein implicated in post-transcriptional regulation and mitochondrial RNA processing. The polyclonal population, generated through CRISPR/Cas9-mediated gene disruption without single-cell cloning, preserves biological heterogeneity and supports population-level analyses.
HeLa cells are an immortalized epithelial line derived from an HPV18-positive cervical adenocarcinoma. The viral oncoproteins E6 and E7 inactivate p53 and disrupt Rb, respectively, leading to deregulated proliferation and apoptosis resistance. This well-characterized background serves as a robust platform for cancer biology, virology, and signal transduction research, and provides a relevant context for examining inflammatory and innate immune pathways.
GRSF1 is an RNA-binding protein that recognizes G-rich sequences in target mRNAs, modulating their splicing, stability, and translation. It participates in mitochondrial RNA granule biology and is activated by upstream signals including TNF-??, IL-1??, TLR ligands, and type I interferons. GRSF1 interacts with NF-??B p65 and hnRNP proteins, and controls NF-??B pathway components such as I??B?? and IKK??, pro-inflammatory cytokines, and mitochondrial mRNAs encoding complex IV subunits. Additional pathway factors include TLR3, IRF3, and IKK??. By bridging cytoplasmic and mitochondrial RNA metabolism, GRSF1 coordinates inflammatory gene expression and energy production.
In HeLa cells, GRSF1 knockout disrupts NF-??B and interferon signaling while impairing mitochondrial gene expression. The HPV-driven inactivation of p53 and Rb may amplify these defects, leading to altered cytokine profiles and apoptotic sensitivity. The polyclonal nature of this model captures cell-to-cell variability, enhancing statistical robustness in population-based assays. This makes the cells particularly suitable for delineating how GRSF1-dependent post-transcriptional control shapes inflammatory phenotypes in a cervical adenocarcinoma-derived epithelial system.
This knockout model supports diverse experimental approaches, including western blotting for NF-??B pathway activation, RT-qPCR for target mRNA quantification, RNA immunoprecipitation for GRSF1?CRNA interactions, and NF-??B reporter assays. Mitochondrial function can be assessed via respiration measurements and complex IV subunit analysis, complemented by cytokine quantification, immunofluorescence for mitochondrial morphology, and flow cytometry for apoptosis. These capabilities enable detailed investigation of post-transcriptional gene regulation in inflammation, mitochondrial gene expression, antiviral innate immunity, and cancer biology in epithelial cells. For further information, please contact Ascent Research.
