Macitentan

Catalog No.S8051 Synonyms: ACT 064992

Macitentan Chemical Structure

Molecular Weight(MW): 588.27

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

Size Price Stock Quantity  
In DMSO USD 400 In stock
USD 170 In stock
USD 570 In stock
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Biological Activity

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

Solubility (25°C)

In vitro DMSO 100 mg/mL (169.98 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 588.27
Formula

C19H20Br2N6O4S

CAS No. 441798-33-0
Storage powder
Synonyms ACT 064992

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Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02932410 Not yet recruiting Pulmonary Arterial Hypertension Actelion February 2017 Phase 3
NCT02893176 Not yet recruiting Lung Transplant Rejection University of California, Los Angeles September 2016 Phase 4
NCT02558231 Recruiting Pulmonary Arterial Hypertension Actelion May 2016 Phase 3
NCT02554903 Recruiting Pulmonary Hypertension Actelion December 2015 Phase 2
NCT02968901 Recruiting Pulmonary Arterial Hypertension Actelion September 2015 Phase 4
NCT02651272 Recruiting Pulmonary Hypertension|Sickle Cell Disease Boston University|Actelion July 2015 Phase 1

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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.

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Endothelin Receptor Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID