The ETFA Knockout Raji Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human Raji B-cell lymphoma line, engineered to disrupt the ETFA gene encoding the electron transfer flavoprotein alpha subunit. This polyclonal knockout pool provides a physiologically relevant loss-of-function model for studying mitochondrial electron transfer and metabolic regulation in a malignant lymphocyte background. The heterogeneous nature of the polyclonal population allows for analysis of gene disruption effects across a diverse cellular context, avoiding clonal artifacts and better reflecting native tumor heterogeneity. This product is intended for advanced research into fatty acid oxidation, mitochondrial biology, and B-cell malignancies.
The host Raji cell line is an Epstein-Barr virus (EBV)-positive human Burkitt lymphoma-derived B-cell model that retains surface IgM expression and critical B-cell receptor signaling components. Widely employed in immunology and oncology research, Raji cells serve as a robust system for investigating antigen presentation, B-cell activation, and lymphomagenesis. Their malignant phenotype and metabolic dependencies make them particularly relevant for studies intersecting metabolism and B-cell biology. The high proliferative rate and well-characterized genetics of Raji cells enable reproducible and scalable experimental designs.
ETFA functions as a central electron acceptor in mitochondrial flavoprotein-linked reactions, receiving reducing equivalents from multiple acyl-CoA dehydrogenases during fatty acid beta-oxidation and amino acid catabolism. It forms a heterodimeric complex with ETFB and interacts with ETFDH (ETF:ubiquinone oxidoreductase) to transfer electrons to ubiquinone, thereby connecting these catabolic pathways to the mitochondrial respiratory chain at Complex III. This process is transcriptionally regulated by PPAR?? and PGC-1??, which control expression of ETFA and associated acyl-CoA dehydrogenases (medium-chain, short-chain, long-chain, and isovaleryl-CoA dehydrogenases). Downstream, electron flux through ETFDH supports ubiquinone reduction, ATP synthesis, and maintenance of mitochondrial membrane potential, while imbalances can increase reactive oxygen species generation.
Disruption of ETFA in Raji cells is expected to uncouple fatty acid and amino acid oxidation from oxidative phosphorylation, forcing a reliance on alternative metabolic pathways and potentially altering redox homeostasis. This model is particularly relevant for investigating the metabolic reprogramming that supports rapid proliferation in B-cell lymphomas, where fatty acid utilization may contribute to energy production and biosynthesis. Furthermore, loss of ETFA mimics aspects of glutaric acidemia type II, a mitochondrial disorder associated with metabolic acidosis and hypoglycemia, enabling studies into disease mechanisms and metabolic vulnerabilities in a cancer context. The knockout cells can be subjected to metabolic stress conditions, such as glucose deprivation or fatty acid-rich media, to assess functional consequences.
Researchers can employ these ETFA knockout cells in a wide array of functional assays, including Seahorse-based mitochondrial respiration profiling, fatty acid oxidation flux measurements using labeled substrates, ATP quantification, and reactive oxygen species detection. Metabolomic and proteomic analyses can map pathway rewiring, while drug sensitivity screens with mitochondrial inhibitors may reveal synthetic lethal interactions. The model supports investigation of PPAR??/PGC-1?? signaling and evaluation of therapeutic strategies targeting mitochondrial metabolism in lymphoma. For further information, please contact Ascent Research.
