Endothelin Receptor Antagonists

Part of the Respiratory Medicine book series (RM, volume 12)

Abstract

Endothelin-1 (ET-1) is a potent vasoconstrictor and mitogen that is secreted by the endothelium. Pulmonary vascular expression of endothelin is increased in pulmonary hypertension and plasma levels correlate with the severity of disease. Several endothelin receptor antagonists (ERAs) have been developed and are available for the treatment of pulmonary arterial hypertension (PAH). These drugs have been shown to be effective at improving functional capacity, decreasing pulmonary vascular resistance and delaying the time to clinical worsening and play an important role in the management of PAH. This chapter briefly reviews how the endothelin signaling pathway modulates pulmonary vascular function and describes its role in the pathogenesis of PAH. The major clinical trials responsible for the currently available ERAs are presented along with their findings and limitations. Recently, adopted treatment guidelines for the use of ERAs in the treatment of pulmonary hypertensive disease are discussed along with potential side effects and adverse reactions associated with the use of these drugs.

Keywords

Endothelin Endothelin-1 Endothelin receptor Endothelin receptor antagonist Pulmonary hypertension Pulmonary arterial hypertension 

Abbreviations

6MWD

6-min Walk distance

CTEPH

Chronic thromboembolic pulmonary hypertension

ERA

Endothelin receptor antagonist

ET-1

Endothelin-1

ET-2

Endothelin-2

ET-3

Endothelin-3

ETA

Endothelin receptor A

ETB

Endothelin receptor B

IPAH

Idiopathic pulmonary arterial hypertension

mPAP

Mean pulmonary artery pressure

NO

Nitric oxide

PAH

Pulmonary arterial hypertension

PPET-1

Preproendothelin

PVR

Pulmonary vascular resistance

TPR

Total pulmonary resistance

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Pulmonary and Critical Care Division, Massachusetts General HospitalHarvard Medical SchoolBostonUSA

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