FOXRED1 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human Raji B lymphoblast cell line. The FOXRED1 gene has been disrupted to create a loss-of-function model for studying mitochondrial complex I assembly and function. This polyclonal population preserves the genetic heterogeneity of edited cells, enabling robust representation of knockout effects downstream.
The parental Raji cell line is an Epstein-Barr virus (EBV)-positive Burkitt lymphoma model originating from a human male. These B lymphocytes grow in suspension and are widely used to investigate B-cell malignancies, viral oncogenesis, and immune cell signaling. The EBV-immortalized nature provides a stable and well-characterized background for interrogating metabolic dependencies in lymphomagenesis.
FOXRED1 encodes a FAD-dependent flavoprotein that functions as a molecular chaperone essential for the assembly of mitochondrial complex I. It interacts with assembly factors such as NDUFAF1, ACAD9, ECSIT, and TMEM126B, facilitating the incorporation of core subunits including NDUFS1, NDUFV1, and NDUFA9. FOXRED1 expression is regulated by mitochondrial biogenesis factors NRF1 and PGC-1??. Knockout of FOXRED1 disrupts complex I holoenzyme formation, impairing electron transport and oxidative phosphorylation, leading to reduced ATP synthesis, elevated reactive oxygen species (ROS), and activation of the mitochondrial unfolded protein response. Downstream effects involve destabilization of complex I subunits and altered redox homeostasis.
In the Raji B lymphoblast model, FOXRED1 knockout uncovers vulnerabilities associated with mitochondrial dysfunction in EBV-driven lymphomagenesis. Burkitt lymphoma cells exhibit high metabolic demands; disrupting complex I assembly forces metabolic rewiring and may sensitize cells to mitochondrial inhibitors. This model enables dissection of redox signaling pathways and their contribution to B-cell survival and transformation. It provides a physiologically relevant platform to study mitochondrial pathology in hematological malignancies and to assess candidate therapeutic interventions targeting the oxidative phosphorylation pathway.
Researchers can employ this knockout cell population to measure complex I enzymatic activity, perform blue native PAGE to assess supercomplex formation, and quantify oxygen consumption rates using Seahorse analyzers. Western blotting for NDUFS1, NDUFV1, and other subunits confirms assembly defects. Flow cytometry with mitochondrial membrane potential dyes and ROS indicators evaluate metabolic stress responses. Cell viability assays under glucose deprivation or in the presence of complex I inhibitors (e.g., rotenone) reveal metabolic vulnerabilities. This polyclonal knockout model is also suitable for screening small molecules that bypass complex I defects or modulate redox balance, as well as for transcriptomic and proteomic analyses of mitochondrial biogenesis factors including NRF1 and PGC-1??. For further details, please contact Ascent Research.
