eta antagonist 1

ETA antagonist 1 is an antagonist of ETA selective (IC50 of 0.08 μM).

Clazosentan (Ro 61-1790) 是一种特异性内皮素 A (ETA）受体拮抗剂,抑制 ET-1 介导的血管痉挛。Clazosentan 可用于研究神经系统疾病和心血管疾病。

Avosentan（Ro 67-0565; SPP-301） 是有效的内皮素受体（ETA）拮抗剂,对内皮素-1诱导的收缩有很强的抑制作用,可能对慢性肾脏疾病具有保护作用。[2]

Bosentan (Benzenesulfonamide) 是 endothelin-1 (ET)拮抗剂，在人的 SMC 细胞中，它能够作用于 ETA 受体(Ki:4.7 nM)和 ETB 受体(Ki:95 nM)。

ABT-546 (A-216546) is a potent, highly selective, and active endothelin ETA receptor antagonist with a Ki of 0.46 nM for [125I]endothelin-1 binding to cloned human endothelin ETA.

A-192621 is a potent, nonpeptide, orally active and selective endothelin B (ETB) receptor antagonist with an IC50 of 4.5 nM and a Ki of 8.8 nM. A-192621 promotes apoptosis in PASMCs and it also causes elevation of arterial blood pressure and an elevation

BMS-248360 is a potent and orally active dual antagonist of both angiotensin II receptor (AT1) and endothelin A (ETA) receptor. With Kis of 10 nM and 1.9 nM for hAT1 and hETA receptor, respectively. BMS-248360 shows hypertensive effects[1].

J-104132 is a potetn and selective endothelin A B receptor antagonist (Ki: cloned human ETA = 0.034 nM; cloned human ETB = 0.104 nM) . In vitro, J-104132 is a potent antagonist of ET-1-induced accumulation of [3H]inositol phosphates in Chinese hamster ova

Ro 46-2005是新型非肽类内皮素拮抗剂，能够抑制人血管平滑肌细胞(ETA 受体)(IC50:220 nM)。

T-0201 (TA 0201) is a highly potent, long-acting, orally active, and selective ETA receptor antagonist. T-0201 also inhibited ET-1-induced pulmonary artery contraction in isolated rabbits.

ACT-373898 is a metabolite of the endothelin (ET) receptor type A (ETA) and ETBdual antagonist macitentan .1 1.Dingemanse, J., Sidharta, P.N., Maddrey, W.C., et al.Efficacy, safety and clinical pharmacology of macitentan in comparison to other endothelin receptor antagonists in the treatment of pulmonary arterial hypertensionExpert Opin. Drug Saf.13(3)391-405(2013)

Nebentan (YM598) is a potent, selective and orally active non-peptide endothelin ETA receptor antagonist through the modification of Bosentan . Nebentan inhibits [125I] endothelin-1 binding to cloned human endothelin ETA and ETB receptor, with Ki of 0.697 nM and 569 nM, respectively[1]. YM598 can ameliorate the progression of cor pulmonale and myocardial infarction in vivo[2]. Nebentan inhibits the specific binding of [125I] endothelin-1 to endothelin ETA and ETB receptors in a concentration dependent manner,Ki values are 0.697 nM and 1.53 nM for human and rat endothelin ETA receptors, respectively. In contrast, YM598 exhibits low affinities for human and rat endothelin ETB receptors, with Ki values of 569 nM and 155 nM,respectively[1].In measurement of intracellular Ca2+ concentration, Nebentan concentration-dependently inhibits the increase in [Ca2+]i induced by 10 nM endothelin-1 in both CHO cells and A10 cells, the IC50 values are 26.2 nM for CHO cells and 26.7 nM for A10 cells, respectively[1]. Nebentan (oral administration; 0.1-1 mg kg; 4 weeks) significantly inhibits the progression of pulmonary hypertension and the development of right ventricular hypertrophy[2].Nebentan (oral administration; 1 mg kg; 30 weeks) significantly ameliorates the poor survival rate of CHF rats, it markedly reduces the hypertrophy of both ventricles as well as pulmonary congestion[2]. [1]. Hironori Yuyama, et al. Pharmacological Characterization of YM598, an Orally Active and Highly Potent Selective Endothelin ET(A) Receptor Antagonist. Eur J Pharmacol. 2003 Sep 30;478(1):61-71. [2]. Akira Fujimori, et al. YM598, an Orally Active ET(A) Receptor Antagonist, Ameliorates the Progression of Cardiopulmonary Changes and Both-Side Heart Failure in Rats With Cor Pulmonale and Myocardial Infarction. J Cardiovasc Pharmacol. 2004 Nov;44 Suppl 1:S354-7.

Thrombin receptor agonist peptide (TRAP-14) is a 14-amino acid peptide agonist of the α-thrombin receptor. It induces aggregation of washed platelets as well as platelets in citrated and hirudin plasma. TRAP-14 (100 μM) increases the cytosolic calcium concentration in isolated guinea pig pulmonary smooth muscle cells 5-fold over baseline. It increases pulmonary arterial pressure in isolated guinea pig lung when used at a concentration of 1 μM, which is comparable to the effect induced by 10 nM α-thrombin. TRAP-14 also induces contraction of isolated rat aortic rings and increases endothelin-1 (ET-1) levels in a dose-dependent manner, an effect that is reversed by the ETA antagonist BQ-123 and the nitric oxide synthase (NOS) inhibitor L-NNA .

Bosentan hydrate (Ro 47-0203) 是endothelin-1 (ET)竞争性拮抗剂，在人SMC 细胞中，它能够作用于 ETA 受体(Ki:4.7 nM)和 ETB 受体(Ki:95 nM)。

BQ-123 是高效的内皮素 A(ETA)受体选择性拮抗剂，其IC50=7.3 nM，Ki=25 nM。它能够降低高血压大鼠血压，抑制内皮素-1 介导的人肺动脉平滑肌细胞增殖。

Bosentan-d4 是 Bosentan 的氘代物。Bosentan 是一种有效的endothelin-1 (ET)拮抗剂，在人的 SMC 细胞中，作用于ETA 和ETB 受体，Ki 值分别为 4.7 nM 和 95 nM。

BQ-123 TFA 是一种高效、选择性内皮素 A(ETA)受体拮抗剂，IC50值为 7.3 nM，Ki 值为 25 nM。BQ-123 TFA 抑制内皮素-1 介导的人肺动脉平滑肌细胞增殖，降低高血压大鼠血压。

Edonentan (BMS 207940) hydrate 作为一种高效的选择性内皮素 A (ETA) 受体拮抗剂，展现出极低的Ki值，仅为 10 pM。在大鼠体内，该化合物的口服生物利用度达到了完美的 (100%)。