RXRA&RXRB Knockout A549 Cell Line

The choice depends on whether you are studying combined RXR-mediated nuclear receptor signaling in lung cancer biology or distinguishing RXR functions from RXRG-independent processes. The Double Knockout line is uniquely valuable for asking whether RXR-mediated transcription is required for these processes — combined RXRA + RXRB loss eliminates the dominant RXR partners in most non-hematopoietic cells, leaving only minimal RXRG (typically tissue-restricted) compensation. Overexpression of either RXR isoform in the double knockout enables isoform-specific functional dissection. For lung cancer nuclear receptor research, the EDITGENE RXRA & RXRB Double Knockout in A-549 is highly informative — A-549 is a workhorse NSCLC model, and the double knockout disrupts retinoid X receptor partnerships with RAR (retinoid signaling), PPAR (lipid metabolism), LXR (cholesterol homeostasis), and other partners simultaneously. Single-RXR rescue (RXRA alone or RXRB alone) in the double knockout is the gold-standard experimental design for distinguishing paralog-specific functions. The knockout is valuable for studying bexarotene (Targretin), RXR-selective rexinoid mechanism, and emerging RXR-targeted therapeutics.

Primary applications: • Combined retinoid/rexinoid response: RAR-RXR (retinoic acid response) and RXR-RXR (rexinoid response) reporter assays simultaneously disrupted in the double knockout. • Single-RXR rescue studies: re-introduction of RXRA alone or RXRB alone enables isoform-specific functional dissection in a clean double-knockout background — the gold-standard experimental design. • Nuclear receptor partner studies: PPAR, LXR, FXR, VDR, TR signaling readouts to assess pan-RXR partnership disruption. • Bexarotene/rexinoid specificity: critical genetic control for RXR-targeted compounds (bexarotene, IRX4204, A-792611) in cancer and metabolic disease contexts. • Lung cancer biology: differentiation, proliferation, and EMT studies given RAR-RXR signaling's role in lung cancer biology. EDITGENE recommends this model for researchers investigating RXR family biology, RXR-targeted nuclear receptor pharmacology, and lung cancer-relevant retinoid signaling.

Yes, and rescue experiments are uniquely powerful in this double knockout background: • Single-RXR rescue: re-introduction of RXRA alone or RXRB alone in the double knockout enables isoform-specific functional dissection — the gold-standard experimental design for redundant nuclear receptor paralogs. • Construct design: codon-modified RXRA or RXRB sequences with small C-terminal tags (FLAG, HA). Preserve all nuclear receptor functional domains. • DNA-binding-deficient and ligand-binding-deficient rescue: structure-function variants enable dissection of RXR-specific activities in the clean double-knockout background. • Functional readout: rescue should restore RAR-RXR retinoid signaling (DR5 reporter), PPAR-RXR lipid metabolism signaling (DR1 reporter), and other partnered nuclear receptor activities. A-549 transduces efficiently with lentivirus and supports systematic single-paralog rescue experiments that would be difficult to interpret in single-knockout backgrounds with paralog compensation.