Blockade of activin type II receptors with a dual anti-ActRIIA/IIB antibody is critical to promote maximal skeletal muscle hypertrophy.
Morvan, F., Rondeau, J.M., Zou, C., Minetti, G., Scheufler, C., Scharenberg, M., Jacobi, C., Brebbia, P., Ritter, V., Toussaint, G., Koelbing, C., Leber, X., Schilb, A., Witte, F., Lehmann, S., Koch, E., Geisse, S., Glass, D.J., Lach-Trifilieff, E.(2017) Proc. Natl. Acad. Sci. U.S.A. 114: 12448-12453
- PubMed: 29109273 
- DOI: 10.1073/pnas.1707925114
- Primary Citation of Related Structures:  
- PubMed Abstract: 
The TGF-β family ligands myostatin, GDF11, and activins are negative regulators of skeletal muscle mass, which have been reported to primarily signal via the ActRIIB receptor on skeletal muscle and thereby induce muscle wasting described as cachexia. ...