FTL Knockout HAP1 Cell Line

The choice depends on whether you are studying FTL (ferritin light chain)'s role as a component of the cytosolic ferritin iron storage complex or modeling neuroferritinopathy and FTL-related iron metabolism disorders. The Knockout line is the standard tool for asking whether FTL is required for these processes — FTL combines with FTH1 (ferritin heavy chain) to form the 24-subunit ferritin holoenzyme that stores up to 4500 iron atoms per molecule as ferric oxyhydroxide; FTH1 provides ferroxidase activity while FTL contributes to nucleation and iron storage. Overexpression is useful for studying FTL gain-of-function effects. For iron metabolism research, the EDITGENE FTL Knockout in HAP1 enables study of ferritin biology. FTL mutations (typically C-terminal frameshift/insertion mutations) cause neuroferritinopathy (autosomal dominant adult-onset basal ganglia disease with iron accumulation in brain); biallelic FTL loss causes hyperferritinemia-cataract syndrome with cataract. Rescue with wild-type or disease-associated FTL mutations enables genotype-function studies. The knockout is valuable for studying iron storage biology, ferritinophagy (NCOA4-mediated ferritin degradation), and emerging ferritin-targeted therapeutic approaches.

Primary applications: • Cellular iron storage: ferritin loading and iron content analysis (ferrozine assay, atomic absorption) in FTL-null cells. • Ferritinophagy: NCOA4-mediated ferritin degradation analysis given FTL's role in the ferritinophagy substrate. • Neuroferritinopathy modeling: rescue with patient-derived FTL C-terminal frameshift mutations for genotype-function studies of neurodegeneration with brain iron accumulation. • Hyperferritinemia-cataract modeling: rescue with FTL 5'-UTR IRE mutations for genotype-function studies. EDITGENE recommends this model for researchers investigating ferritin biology, iron storage, ferritinophagy, and FTL-related iron metabolism disorders.

Yes. FTL rescue experiments require attention to ferritin holoenzyme assembly: • Construct design: use a codon-modified FTL sequence with a small C-terminal tag (FLAG, HA). FTL has 5'-UTR IRE (iron-responsive element) for translational regulation, mature protein with iron-binding residues — preserve all elements. • FTH1 partnership: FTL combines with FTH1 in a 24-subunit holoenzyme — rescue interpretation considers FTH1 expression and L/H subunit ratio. • Neuroferritinopathy mutation rescue: patient-derived FTL C-terminal frameshift/insertion mutations enable disease genotype-function studies. • Functional readout: rescue should restore ferritin holoenzyme assembly and cellular iron storage capacity. HAP1-specific considerations: • Diploidization: HAP1 cells gradually diploidize during extended culture — confirm ploidy by flow cytometry at the time of phenotypic assay. • Integration site sensitivity: position effects on transgene expression are more pronounced in near-haploid backgrounds; generating multiple independent rescue clones is strongly recommended. • Transduction efficiency: HAP1 transduces with lentivirus at moderate efficiency — increase MOI compared to standard immortalized lines.