Date published: 2026-2-2

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ETBR Inhibitors

ETBR inhibitors are a class of chemical compounds that primarily target the endothelin type B receptor (ETBR), a G-protein-coupled receptor (GPCR) found in various tissues throughout the human body. These inhibitors have garnered significant attention in the field of pharmacology and drug development due to their ability to modulate the ETBR signaling pathway. The ETBR receptor is a critical component of the endothelin system, which plays a pivotal role in regulating vascular tone, blood pressure, cell proliferation, and inflammation. ETBR inhibitors exert their effects by interfering with the activation and downstream signaling of this receptor, offering a promising avenue for exploring their pharmacological actions. Chemically, ETBR inhibitors encompass a diverse range of compounds, including small molecules and peptides, which can selectively bind to the ETBR and modify its activity. By blocking or modulating the receptor's function, these inhibitors can influence various physiological processes. Some of these compounds are highly specific for ETBR, while others may exhibit varying degrees of selectivity among the endothelin receptor subtypes (ETAR and ETBR). Researchers have been actively studying ETBR inhibitors to better understand their molecular mechanisms and applications, especially in conditions where the endothelin system is implicated. These inhibitors have shown promise in research for their ability to regulate vascular tone, inflammation, and cell proliferation, making them important tools for investigating the roles of ETBR in health and disease.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Sulfisoxazole

127-69-5sc-204313
50 mg
$65.00
(0)

Sulfisoxazole acts as an ETBR by engaging in specific hydrogen bonding interactions with the receptor, which alters downstream signaling pathways. Its unique sulfonamide group enhances binding affinity, promoting a conformational change in the receptor. The compound exhibits notable solubility characteristics, allowing for efficient diffusion in various environments. Additionally, its reaction kinetics suggest rapid onset of interaction, contributing to its dynamic behavior in biological systems.

BQ 788 sodium salt

156161-89-6sc-203534
sc-203534A
sc-203534B
1 mg
5 mg
25 mg
$318.00
$1297.00
$5000.00
2
(1)

BQ 788 sodium salt functions as an ETBR by selectively binding to the endothelin receptor, stabilizing its inactive conformation. This interaction is characterized by unique electrostatic and hydrophobic forces that modulate receptor activity. The compound's high solubility facilitates its distribution in aqueous environments, while its kinetic profile indicates a fast association rate, allowing for prompt engagement with the receptor. Its distinct structural features contribute to its specificity and efficacy in receptor modulation.

IRL-2500

169545-27-1sc-204018
sc-204018A
10 mg
50 mg
$270.00
$1040.00
(1)

IRL-2500 acts as an ETBR through its ability to form stable complexes with the endothelin receptor, leveraging specific hydrogen bonding and van der Waals interactions. This compound exhibits a unique conformational flexibility that enhances its binding affinity, allowing for effective receptor inhibition. Its low molecular weight contributes to rapid diffusion across biological membranes, while its reaction kinetics reveal a notable equilibrium shift favoring the inactive receptor state, underscoring its role in modulating receptor dynamics.

Kendomycin

183202-73-5sc-202196
sc-202196A
100 µg
500 µg
$131.00
$615.00
(1)

Kendomycin functions as an ETBR by engaging in selective interactions with the endothelin receptor, characterized by its unique ability to form transient covalent bonds. This compound displays a distinctive steric profile that facilitates its entry into receptor pockets, promoting a conformational change that stabilizes the inactive state. Its reactivity is influenced by specific electronic properties, leading to a rapid association-dissociation rate that fine-tunes receptor signaling pathways.

Sclerotiorin

549-23-5sc-205505
sc-205505A
500 µg
1 mg
$84.00
$203.00
(0)

Sclerotiorin acts as an ETBR through its unique ability to modulate receptor dynamics via hydrophobic interactions and hydrogen bonding. Its structural conformation allows for effective steric hindrance, which alters receptor accessibility and promotes specific signaling cascades. The compound exhibits notable reaction kinetics, characterized by a balanced rate of binding and unbinding, enabling precise control over receptor activation states. This dynamic behavior enhances its role in cellular communication.

Bosentan

147536-97-8sc-210957
10 mg
$195.00
3
(1)

Bosentan functions as an ETBR by engaging in selective binding to endothelin receptors, facilitating conformational changes that influence downstream signaling pathways. Its unique molecular structure allows for specific interactions with receptor sites, enhancing affinity and selectivity. The compound's kinetic profile reveals a rapid association and dissociation rate, which fine-tunes receptor activation and modulates cellular responses, thereby impacting various physiological processes.

Bosentan-d4

sc-217787
1 mg
$320.00
(1)

Bosentan-d4 acts as an ETBR through its isotopic labeling, which enhances the precision of tracking molecular interactions in research settings. Its distinct deuterated structure alters reaction kinetics, providing insights into binding dynamics and receptor conformations. The compound exhibits unique solubility characteristics, influencing its distribution in biological systems. Additionally, its isotopic composition allows for advanced analytical techniques, enabling detailed studies of receptor-ligand interactions.

Macitentan

441798-33-0sc-489332
sc-489332A
5 mg
25 mg
$320.00
$440.00
(0)

Macitentan functions as an ETBR by selectively modulating endothelin receptor pathways, showcasing unique binding affinities that influence downstream signaling cascades. Its structural features facilitate specific molecular interactions, enhancing receptor selectivity. The compound's stability under various conditions allows for prolonged engagement with target receptors, while its distinct physicochemical properties contribute to its behavior in complex biological environments, enabling nuanced studies of receptor dynamics.

Ambrisentan

177036-94-1sc-207276
5 mg
$348.00
(0)

Ambrisentan is a selective ETAR antagonist, but it may indirectly affect ETBR expression by modulating the overall endothelin system balance and receptor availability.

Sitaxsentan Sodium

210421-74-2sc-215857
10 mg
$640.00
(0)

Sitaxsentan Sodium is a selective ETAR antagonist; however, it could potentially influence ETBR expression by altering endothelin receptor dynamics and availability.