Effect of VX-809 on maturation of Δ(G970-T1122)-CFTR protein. Immunoblots for WT-, ΔF508-, and Δ(G970-T1122)-CFTR proteins expressed in CHO cells in the presence of 0, 3, or 10 μM VX-809 at a 37°C for 24 h or b 27°C for 48 h.
Lumacaftor purchased from MedChemExpress. Usage Cited in:
Sci Rep. 2015 Oct 30;5:15946.
[Abstract]
VX-809 reverses the heat-induced effects in cells including reduction in CFTR, upregulation of COX-2 and increases in PGE2.
Powered by Bioz
See more details on Bioz
Description
Lumacaftor (VX-809; VRT 826809) is a CFTR modulator that corrects the folding and trafficking of CFTR protein.
IC50 & Target
EC50: 0.1 μM (CFTR)[1]
In Vitro
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[1]. 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[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Lumacaftor Related Antibodies
In Vivo
Oral dosing of 1 mg/kg Lumacaftor in male Sprague-Dawley rats results in a Cmax of 2.4±1.3 μM with a t1/2 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[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Room temperature in continental US; may vary elsewhere.
Storage
Powder
-20°C
3 years
4°C
2 years
In solvent
-80°C
1 year
-20°C
6 months
Solvent & Solubility
In Vitro:
DMSO : 25 mg/mL (55.26 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Preparing Stock Solutions
ConcentrationSolventMass
1 mg
5 mg
10 mg
1 mM
2.2104 mL
11.0519 mL
22.1038 mL
5 mM
0.4421 mL
2.2104 mL
4.4208 mL
10 mM
0.2210 mL
1.1052 mL
2.2104 mL
View the Complete Stock Solution Preparation Table
*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, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day. The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Protocol 1
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 3 mg/mL (6.63 mM); Clear solution
This protocol yields a clear solution of ≥ 3 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μLDMSO stock solution (30.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Protocol 2
Add each solvent one by one: 10% DMSO 90% Corn Oil
Solubility: ≥ 3 mg/mL (6.63 mM); Clear solution
This protocol yields a clear solution of ≥ 3 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Taking 1 mL working solution as an example, add 100 μLDMSO stock solution (30.0 mg/mL) to 900 μLCorn oil, and mix evenly.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:
Dosage
mg/kg
Animal weight (per animal)
g
Dosing volume (per animal)
μL
Number of animals
Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO+
%
+
%
Tween-80
+
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO,
. All of co-solvents are available by MedChemExpress (MCE).
, Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration:
mg/mL
Method for preparing stock solution:
mg
drug dissolved in
μL
DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take
μL DMSO stock solution, add
μL .
μL , mix evenly, next add
μL Tween 80, mix evenly, then add
μL Saline.
Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution
If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
[1]. Van Goor F, et al. Correction of the F508del-CFTR protein processing defect in vitro by the investigational drug VX-809. Proc Natl Acad Sci U S A. 2011 Nov 15;108(46):18843-8.
[Content Brief]
[2]. Phuan PW, et al. Synergy-based small-molecule screen using a human lung epithelial cell line yields ΔF508-CFTR correctors that augment VX-809 maximal efficacy. Mol Pharmacol. 2014 Jul;86(1):42-51.
[Content Brief]
Kinase Assay
[2]
Screening is carried out using a Beckman Coulter Biomek FX platform. In one set of assays, R1070W-F508-CFTR-HRP (R1070W-HRP)-expressing CFBE41o- cells are incubated with 100 µL medium containing 25 µM test compounds and 0.5 μg/mL Doxycycline for 24 hours at 37°C. In a second set of assays, F508-CFTR-HRP (F508-HRP)-expressing CFBE41o- cells are incubated with 100 µL medium containing 25 µM test compounds, 2 µM Lumacaftor, and 0.5 μg/mL doxycycline for 24 hours at 37°C. All compound plates contain negative controls (DMSO) and positive controls (2 µM Lumacaftor). In both assays, the cells are washed four times with PBS, and HRP activity is assayed by the addition of 50 µL/well of HRP substrate. After shaking for 5 minutes, chemiluminescence is measured using a Tecan Infinite M1000 plate reader equipped with an automated stacker (integration time, 100 milliseconds)[2].
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Cell Assay
[2]
.A549 cells expressing F508-CFTR YFP are grown at 37°C/5% CO2 for 18-24 hours after plating. The cells are then incubated with 100 μL of medium containing test compounds for 18-24 hours. At the time of the assay, cells are washed with PBS and then incubated for 10 minutes with PBS containing forskolin (20 μM) and genistein (50 μM). Each well is assayed individually for I- influx by recording fluorescence continuously (200 milliseconds per point) for 2 seconds (baseline) and then for 12 seconds after rapid addition of 165 μL PBS in which 137 mM Cl- is replaced by I-. The initial I- influx rate is computed by fitting the final 11.5 seconds of the data to an exponential for extrapolation of initial slope, which is normalized for background-subtracted initial fluorescence. All compound plates contain negative controls (DMSO vehicle) and positive controls (5 µM Lumacaftor). Fluorescence is measured using a Tecan Infinite M1000 plate reader equipped with a dual syringe pump (excitation/emission 500/535 nm)[2].
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Animal Administration
[1]
Rats[1] Male rats (n=3 per dose group) are orally administered Lumacaftor in a vehicle consisting of 0.5% Tween80/0.5% methylcellulose/water at a dose volume of 5 mL/kg. The concentration of Lumacaftor in plasma samples is determined with a liquid chromatography/tandem MS method. Pharmacokinetic parameters are calculated byusing WinNonlin Professional Edition software.
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
References
[1]. Van Goor F, et al. Correction of the F508del-CFTR protein processing defect in vitro by the investigational drug VX-809. Proc Natl Acad Sci U S A. 2011 Nov 15;108(46):18843-8.
[Content Brief]
[2]. Phuan PW, et al. Synergy-based small-molecule screen using a human lung epithelial cell line yields ΔF508-CFTR correctors that augment VX-809 maximal efficacy. Mol Pharmacol. 2014 Jul;86(1):42-51.
[Content Brief]
[1]. Van Goor F, et al. Correction of the F508del-CFTR protein processing defect in vitro by the investigational drug VX-809. Proc Natl Acad Sci U S A. 2011 Nov 15;108(46):18843-8.
[2]. Phuan PW, et al. Synergy-based small-molecule screen using a human lung epithelial cell line yields ΔF508-CFTR correctors that augment VX-809 maximal efficacy. Mol Pharmacol. 2014 Jul;86(1):42-51.
Complete Stock Solution Preparation Table
*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, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
Optional Solvent
ConcentrationSolventMass
1 mg
5 mg
10 mg
25 mg
DMSO
1 mM
2.2104 mL
11.0519 mL
22.1038 mL
55.2596 mL
5 mM
0.4421 mL
2.2104 mL
4.4208 mL
11.0519 mL
10 mM
0.2210 mL
1.1052 mL
2.2104 mL
5.5260 mL
15 mM
0.1474 mL
0.7368 mL
1.4736 mL
3.6840 mL
20 mM
0.1105 mL
0.5526 mL
1.1052 mL
2.7630 mL
25 mM
0.0884 mL
0.4421 mL
0.8842 mL
2.2104 mL
30 mM
0.0737 mL
0.3684 mL
0.7368 mL
1.8420 mL
40 mM
0.0553 mL
0.2763 mL
0.5526 mL
1.3815 mL
50 mM
0.0442 mL
0.2210 mL
0.4421 mL
1.1052 mL
Lumacaftor Related Classifications
Help & FAQs
Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.