Macitentan (ACT 064992)

Catalog No.S8051

For research use only.

Macitentan (ACT 064992) is an orally active, non-peptide, dual ETA/ETB (endothelin) receptor antagonist with IC50 of 0.5 nM/391 nM.

Macitentan (ACT 064992) Chemical Structure

CAS No. 441798-33-0

Selleck's Macitentan (ACT 064992) has been cited by 7 Publications

Purity & Quality Control

Choose Selective Endothelin Receptor Inhibitors

Other Endothelin Receptor Products

Biological Activity

Description Macitentan (ACT 064992) is an orally active, non-peptide, dual ETA/ETB (endothelin) receptor antagonist with IC50 of 0.5 nM/391 nM.
ET-A [1] ET-B [1]
0.5 nM 391 nM
In vitro

Macitentan achieves full inhibition of intracellular calcium increase induced by ET-1 on primary human pulmonary smooth muscle cells with approximate IC50 of 1 nM. Macitentan inhibits ET-1-induced contractions on isolated rat aortic rings or S6c-induced contractions on isolated rat tracheal rings with pA2 of 7.6 and 5.9, respectively. [1]

In vivo Macitentan administered to normotensive rats, increases plasma ET-1 concentration, which occurred at a 10-fold lower dose than with bosentan. Macitentan dose-dependently decreases mean arterial blood pressure in hypertensive DOCA-salt rats with a maximal effect of -26 mm Hg at a dose of 10 mg/kg and a ED50 of 1mg/kg. At the maximal effective dose, the duration of the blood pressure response to Macitentan is approximately 40 hr. Macitentan orally administrated dose-dependently preventes the development of pulmonary hypertension and the development of right ventricle hypertrophy with a maximal efficacy of 30 mg/kg/day in monocrotaline rat model of pulmonary hypertension. Chronic oral administration of Macitentan at 30 mg/kg/day significantly improves the 42-day survival in monocrotaline rats (83 vs 50% survival in macitentan vs vehicle; 66% reduction of mortality at 42 days). [1] Macitentan (30 mg/kg/day) treated for 24 h partially prevents the development of renal vasoconstriction and increases renal blood flow in streptozotocin-induced diabetic rat model. Macitentan increases glomerular filtration rate and decreases filtration fraction, and attenuates vascular and tubulo-interstitial lesions and also glomerular damage. [1] Macitentan (25 mg/kg/day, p.o.) attenuates the increase of renal, cardiac and retinal ET-1, TGF-β1, VEGF, FN, EDB+FN, collagenα-I(IV) mRNA expression along with increased FN, collagen protein and NF-κB activation induced by type 2 diabetes in db/db mice. Macitentan also ameliorates mesangial expansion, cardiac dysfunction and the increased expression of ANP and BNP in these diabetic mice. [2] Macitentan (100mg/kg) treatment combined with paclitaxel (5 mg/kg) reduced tumor incidence (5/9 vs 9/9 of paclitaxel along) and further reduces tumor weight (median [range]: 0.1 vs 0.4 g of paclitaxel along) and incidences of ascites (0/9 vs 4/9 of paclitaxel along) in SKOV3ip1 ovarian cancer model when compared with paclitaxel alone. Macitentan plus paclitaxel inhibits the phosphorylation of ETRs and suppresses the survival pathways of tumor cells by decreasing the levels of pVEGFR2, pAkt, and pMAPK. Macitentan enhances effects of paclitaxel on tumor cells dividing (Brud+ cells: 18.5 vs 30.8 of paclitaxel along) and apoptosis (TUNEL+ cells: 195 vs 150 of paclitaxel along). [3]

Protocol (from reference)

Solubility (25°C)

In vitro

Chemical Information

Molecular Weight 588.27


CAS No. 441798-33-0
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CCCNS(=O)(=O)NC1=C(C(=NC=N1)OCCOC2=NC=C(C=N2)Br)C3=CC=C(C=C3)Br

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

mg/kg g μL

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO % % Tween 80 % ddH2O

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT05167825 Recruiting Drug: Macitentan Pulmonary Arterial Hypertension Janssen Pharmaceutical K.K. September 13 2022 Phase 3
NCT05433675 Recruiting Drug: Macitentan Healthy Actelion June 22 2022 Phase 1
NCT05392530 Recruiting Drug: Macitentan Healthy Actelion May 25 2022 Phase 1
NCT04963439 Completed Drug: Macitentan Healthy Actelion July 8 2021 Phase 1
NCT04780932 Recruiting Drug: Macitentan 10mg|Drug: Placebo Thromboembolic Pulmonary Hypertension|Chronic Disease|Inoperable Disease Assistance Publique - Hôpitaux de Paris|Janssen LP June 14 2021 Phase 2|Phase 3

(data from, updated on 2022-08-01)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

Tel: +1-832-582-8158 Ext:3
If you have any other enquiries, please leave a message.

* Indicates a Required Field

Please enter your name.
Please enter your email. Please enter a valid email address.
Please write something to us.
Tags: buy Macitentan (ACT 064992) | Macitentan (ACT 064992) ic50 | Macitentan (ACT 064992) price | Macitentan (ACT 064992) cost | Macitentan (ACT 064992) solubility dmso | Macitentan (ACT 064992) purchase | Macitentan (ACT 064992) manufacturer | Macitentan (ACT 064992) research buy | Macitentan (ACT 064992) order | Macitentan (ACT 064992) mouse | Macitentan (ACT 064992) chemical structure | Macitentan (ACT 064992) mw | Macitentan (ACT 064992) molecular weight | Macitentan (ACT 064992) datasheet | Macitentan (ACT 064992) supplier | Macitentan (ACT 064992) in vitro | Macitentan (ACT 064992) cell line | Macitentan (ACT 064992) concentration | Macitentan (ACT 064992) nmr