Drug intelligence / Profile preview

sActRIIB

Development stage
Preclinical
Lead developer
Merck
Modality
Fc-Fusion Proteins → Carrier/Scaffold Proteins → Recombinant Proteins and Enzymes
Administration
Intraperitoneal
01

Overview

sActRIIB is a recombinant protein, often engineered as an Fc-fusion protein, that functions as a ligand trap for the Activin Receptor Type IIB (ActRIIB). It binds to and sequesters multiple ligands, including myostatin (MSTN), activin A, and growth/differentiation factor 11 (GDF11), thereby inhibiting their signaling through ActRIIB. This inhibition promotes skeletal muscle growth (hypertrophy) and can lead to a reduction in fat mass.

Other names
soluble activin type IIB receptorsoluble ActRIIB
02

Targets

Activin AINHBB (Activin B)BMP9 (Bone morphogenetic protein 9)GDF11 (Growth differentiation factor 11)GDF8 (Myostatin)

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