Date published: 2026-4-24

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ACTR-IB Inhibitors

ACVR1B inhibitors encompass a range of small molecule compounds that target the activin receptor-like kinase (ALK) family, primarily focusing on ALK4 (ACVR1B), but often extending their effects to ALK2, ALK3, ALK5, and ALK7 due to the shared signaling pathways and structural similarities. These inhibitors function by binding to the kinase domains of the receptors, preventing their activation and subsequent phosphorylation of downstream signaling molecules, especially the SMAD family of proteins. The specificity of these inhibitors varies, with some exhibiting high selectivity for ACVR1B, while others target multiple ALK receptors, exploiting the interconnected nature of the TGF-β and BMP signaling pathways.The inhibition of ACVR1B and related ALK receptors has profound implications for the regulation of various cellular processes. By blocking the kinase activity, these inhibitors prevent the phosphorylation of SMAD2, SMAD3, SMAD1, SMAD5, and SMAD8, key transducers in the TGF-β and BMP signaling pathways. This interruption of signaling cascades results in altered gene expression patterns, impacting processes such as cell proliferation, differentiation, and apoptosis. The inhibitors are designed to provide precision in modulating these pathways, thereby offering potential avenues for research in disease models where dysregulation of TGF-β/BMP signaling is a contributing factor. Their use, however, requires careful consideration of the broader effects on related signaling pathways, given the crosstalk and redundancy inherent in these signaling networks. The development and application of these inhibitors underscore the complexity of targeting specific nodes within a network of signaling pathways.

Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

SB 431542

301836-41-9sc-204265
sc-204265A
sc-204265B
1 mg
10 mg
25 mg
$82.00
$216.00
$416.00
48
(1)

SB 431542 acts as an acid halide, exhibiting a unique propensity for selective acylation of nucleophilic sites, which facilitates the formation of diverse acylated products. Its reactivity is influenced by the presence of specific functional groups that stabilize transition states, enhancing reaction rates. The compound's solubility profile in polar solvents promotes effective interactions with target molecules, allowing for nuanced modulation of cellular signaling pathways and biochemical processes.

A 83-01

909910-43-6sc-203791
sc-203791A
10 mg
50 mg
$202.00
$811.00
16
(1)

A 83-01 functions as an acid halide, characterized by its ability to engage in rapid acylation reactions with nucleophiles, leading to the formation of a variety of acyl derivatives. Its reactivity is significantly enhanced by steric and electronic factors, which influence the stability of intermediates. The compound's unique solvation dynamics in various solvents facilitate selective interactions, allowing for precise manipulation of chemical pathways and reaction kinetics.

TGF-β RI Kinase Inhibitor III

356559-13-2sc-204341
2 mg
$198.00
1
(0)

TGF-β RI Kinase Inhibitor III exhibits distinctive reactivity as an acid halide, primarily through its ability to form stable complexes with specific nucleophiles. This compound demonstrates unique selectivity in its interactions, influenced by its electronic configuration, which modulates the activation energy of reaction pathways. Its kinetic profile reveals a propensity for rapid transformation, enabling efficient acyl transfer processes that can be finely tuned under varying conditions.

TGF-β RI Kinase Inhibitor VIII

356559-20-1sc-203295
2 mg
$100.00
2
(1)

TGF-β RI Kinase Inhibitor VIII showcases remarkable behavior as an acid halide, characterized by its ability to engage in selective electrophilic interactions with various nucleophiles. The compound's unique steric and electronic properties facilitate specific reaction pathways, enhancing its reactivity. Its kinetic characteristics indicate a favorable balance between stability and reactivity, allowing for controlled acylation reactions that can adapt to different environmental factors.

K02288

1431985-92-0sc-488981
5 mg
$330.00
(0)

K02288 is a potent and selective inhibitor of ALK2, ALK3, and ALK6, which indirectly affects ACVR1B signaling by modulating the BMP pathway. It binds to the kinase domain, inhibiting its activity.

DMH-1

1206711-16-1sc-361171
sc-361171B
sc-361171A
sc-361171C
10 mg
25 mg
50 mg
100 mg
$213.00
$318.00
$632.00
$1047.00
2
(0)

DMH1 is a selective ALK2 inhibitor, with a secondary effect on ACVR1B due to pathway overlap. It inhibits BMP signaling by preventing receptor-mediated SMAD1, SMAD5, and SMAD8 phosphorylation.

LDN 193719

1062368-49-3sc-489383
10 mg
$189.00
(0)

LDN 193719 selectively inhibits ALK1 and ALK2, with secondary effects on ACVR1B through pathway crosstalk. It blocks BMP signaling by inhibiting the kinase activity of these receptors.

BML-275

866405-64-3sc-200689
sc-200689A
5 mg
25 mg
$96.00
$355.00
69
(1)

Dorsomorphin is a potent inhibitor of ALK2, ALK3, and ALK6, impacting ACVR1B indirectly. It inhibits BMP signaling by blocking the kinase domain of these receptors.

LDN-214117

1627503-67-6sc-507451
5 mg
$165.00
(0)

LDN-214117 selectively inhibits ALK2, with weaker effects on ALK3 and ACVR1B. It hinders BMP signaling by blocking the kinase activity of these receptors.

DMH 4

515880-75-8sc-497273
10 mg
$380.00
(0)

DMH4 is a selective inhibitor of ALK2, with an indirect influence on ACVR1B signaling. It works by inhibiting BMP signaling, particularly through blocking SMAD1, SMAD5, and SMAD8 phosphorylation.