Lumacaftor-d₄  (Synonyms: VX-809-d₄; VRT 826809-d₄)

Lumacaftor-d₄ is the deuterium labeled Lumacaftor (HY-13262)[1].

Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs^[1].
In fischer rat thyroid (FRT) cells, Lumacaftor improves F508del-CFTR maturation by 7.1±0.3 fold (n=3) compared with vehicle-treated cells (EC₅₀, 0.1±0.1 μM; n=3) and enhances F508del-CFTR-mediated chloride transport by approximately fivefold (EC₅₀, 0.5±0.1 μM; n=3). At Lumacaftor concentrations greater than 10 μM, the response is reduced, resulting in a bell-shaped dose-response relationship with an IC₅₀ of approximately 100 μM. Lumacaftor is orally bioavailable in rats and achieved in vivo plasma levels significantly above concentrations required for in vitro efficacy^[2]. Lumacaftor produces a concentration-dependent increase in the HRP luminescence signal after incubation with cells at 37°C or 27°C in both cell lines, with a similar EC₅₀ value of approximately 0.3 μM. In F508-HRP CFBE41o^- cells at 37°C, Lumacaftor increases the signal maximally to approximately 250 luminescence arbitrary units (a.u.) over the DMSO control baseline of approximately 60 a.u., representing an approximately 4-fold signal increase. Similarly, with the R1070W-HRP CFBE41o^- cells, Lumacaftor increases the signal maximally to approximately 220 a.u. over the DMSO control baseline of approximately 85 a.u., representing an approximately 2.5-fold signal increase. Therefore, both cell lines produced robust signals with a good dynamic range for high-throughput screening^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Oral dosing of 1 mg/kg Lumacaftor in male Sprague-Dawley rats results in a C_max of 2.4±1.3 μM with a t_1/2 of 7.7±0.4 h (mean±SD; n=3), indicating that that Lumacaftor is orally bioavailable and able to reach plasma levels that significantly exceeded EC₅₀s for F508del-CFTR correction^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

456.43

C₂₄H₁₄D₄F₂N₂O₅

2733561-44-7

936727-05-8

Solid

White to off-white

FC1(F)OC(C=C(C=C2)C3(C([2H])([2H])C3([2H])[2H])C(NC4=NC(C5=CC=CC(C(O)=O)=C5)=C(C=C4)C)=O)=C2O1

Room temperature in continental US; may vary elsewhere.

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019 Feb;53(2):211-232.  [Content Brief]