Ambrisentan
Back to search| Scientific Name: | Ambrisentan |
| Brand Name: | Letairis |
| Company Owner: | Not Available |
| Mechanism Of Action | Endothelin-1 (ET-1) is an endogenous peptide that acts on the endothelin type A (ETA) and endothelin type B (ETB) receptors in vascular smooth muscle and endothelium. ETA-mediated actions include vasoconstriction and cell proliferation, whereas ETB predominantly mediates vasodilation, anti-proliferation, and ET-1 clearance. In patients with pulmonary arterial hypertension, ET-1 levels are increased and correlate with increased right arterial pressure and severity of disease. Ambrisentan is one of several newly developed vasodilator drugs that selectively target the endothelin type A (ETA) receptor, inhibiting its action and preventing vasoconstriction. Selective inhibition of the ETA receptor prevents phospholipase C-mediated vasoconstriction and protein kinase C-mediated cell proliferation. Endothelin type B (ETB) receptor function is not significantly inhibited, and nitric oxide and prostacyclin production, cyclic GMP- and cyclic AMP-mediated vasodilation, and endothelin-1 (ET-1) clearance is preserved. |
| Description of the Drug: | Ambrisentan is a selective type A endothelin receptor antagonist used to treat primary pulmonary arterial hypertension and pulmonary arterial hypertension based on diagnostic classifications. |
| Protein Data Bank: | Not Available |
Source: DrugBank Online – DrugBank.com. Retrieved 2023-01-23 from https://go.drugbank.com/drugs/DB06403
