KDM1A Knockout HAP1 Cell Line

The choice depends on whether you are studying KDM1A (LSD1, lysine-specific demethylase 1)'s role as a FAD-dependent histone H3K4me1/me2 demethylase or modeling its functions in AML, SCLC, and other LSD1-dependent cancers. The Knockout line is the standard tool for asking whether LSD1 is required for these processes — LSD1 is the principal H3K4me1/me2 demethylase (the related KDM1B/LSD2 covers a smaller subset of sites) and is a core subunit of the CoREST corepressor complex; LSD1 can also demethylate H3K9me1/me2 in some contexts. Overexpression is useful for studying LSD1 in heterologous expression contexts. For cancer epigenetics research, the EDITGENE KDM1A Knockout in HAP1 is highly informative — LSD1 is one of the most validated cancer epigenetic targets. Rescue with wild-type or catalytically-dead LSD1 is the standard specificity control. The knockout is a critical specificity tool for LSD1 inhibitors (iadademstat/ORY-1001 for AML, CC-90011 for SCLC and solid tumors, GSK2879552, INCB059872) in clinical development — these compounds rely on FAD-dependent catalytic inhibition that the knockout serves as the genetic null control for.

Primary applications: • H3K4me1/me2 demethylase activity: H3K4me1 and H3K4me2 levels analysis by Western blot and ChIP-seq. • CoREST complex assembly: co-immunoprecipitation of LSD1-CoREST complex components (HDAC1/2, CoREST, BHC80) in the absence of LSD1. • LSD1 inhibitor specificity: critical genetic control for iadademstat (ORY-1001, AML), CC-90011 (SCLC), GSK2879552, INCB059872 in clinical development. • Differentiation studies: in heterologous differentiation-relevant contexts, characterization of LSD1's role in lineage specification and AML myeloid differentiation block. EDITGENE recommends this model for researchers investigating LSD1 epigenetic biology and as the critical specificity control for clinical-stage LSD1 inhibitor research.

Yes. LSD1 rescue experiments are well-established for epigenetic research: • Construct design: use a codon-modified KDM1A sequence with a small C-terminal tag (FLAG, HA). LSD1 has SWIRM domain (CoREST interaction), Tower domain (CoREST interaction), and amine oxidase-like domain (FAD-binding catalytic) — preserve all elements. • Catalytically-dead rescue: K661A mutation in the FAD-binding pocket or other FAD-coordination mutations abolish demethylase activity and serve as the standard specificity control. • CoREST-binding-deficient rescue: SWIRM or Tower domain mutations disrupt CoREST partnership without affecting catalytic activity — enabling separation of demethylase-dependent from scaffolding functions. • Inhibitor-resistant rescue: K661A is also resistant to FAD-mimetic inhibitors like ORY-1001 and GSK2879552 — useful for distinguishing on-target from off-target inhibitor effects. • Functional readout: rescue should restore H3K4me1/me2 demethylation at LSD1 target loci. 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.