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How ACE-031 Myostatin Inhibitor Effects Muscle (Explained)

Updated: Nov 26

Evidence-Based. Scientifically Reviewed.

ACE-031, an innovative fusion protein combining activin receptor type IIB and IgG1-Fc, stands at the cutting edge of muscle growth and development research.

Its key function is the suppression of myostatin, a protein that naturally restrains muscle growth.

This suppression leads to an increase in muscle mass, positioning ACE-031 as a potential therapeutic tool, particularly in conditions like Duchenne muscular dystrophy (DMD) characterized by muscle wasting.

Clinical studies underscore its significant role in boosting muscle volume, thus marking it as a potential remedy for various muscle disorders.

Nonetheless, a thorough investigation into its long-term safety and potential side effects is vital before its widespread use in clinical practice.

What is ACE-031?

ACE-031 is a novel peptide of significant interest in the realm of muscle growth and development. Structurally, it's a fusion protein made of activin receptor type IIB and IgG1-Fc.

This structure allows ACE-031 to selectively target myostatin and related proteins. Myostatin is a key protein in muscle growth regulation.

By hindering myostatin, ACE-031 paves the way for enhanced muscle development, showing promise in treating muscle-wasting diseases.

ace-031 mechanism of action diagram

Mechanism of Action

ACE-031's primary action mechanism involves interacting with myostatin and other related proteins.

Myostatin typically limits muscle growth, serving as a regulatory protein to curb excessive muscle development.

However, this limitation can be counterproductive in scenarios where muscle growth is beneficial, such as in muscle wasting diseases.

ACE-031's binding to myostatin inhibits its action, mimicking the effects of reduced myostatin levels.

This inhibition facilitates increased muscle growth and strength by permitting the body's muscle-building mechanisms to operate more freely.

Clinical Implications

ACE-031 is particularly noteworthy for its potential in treating Duchenne muscular dystrophy (DMD), a severe muscle-wasting disease.

Clinical trials have shown ACE-031's effectiveness in augmenting muscle mass in individuals with DMD.

By blocking myostatin, ACE-031 could potentially counter the muscle degeneration characteristic of this disease, leading to improved muscle strength and functionality.

This is crucial, given the limited effective treatments currently available for DMD and other similar muscle disorders.

Effects on Muscle Mass

ACE-031's most prominent effect is its capacity to augment muscle mass. Clinical research has shown that ACE-031 administration can lead to considerable increases in muscle volume.

This is particularly advantageous for those suffering from diseases marked by muscle wasting or weakness.

Beyond therapeutic uses, ACE-031's potential in boosting muscle mass also generates interest in fields like sports and bodybuilding, though its application here involves ethical and regulatory concerns.

Safety and Side Effects

The safety profile of ACE-031 is a crucial aspect of its therapeutic use. Clinical trials have shed light on its tolerability and associated side effects.

Although the findings are encouraging, extensive research is needed to fully grasp the long-term effects and possible adverse reactions of ACE-031.


ACE-031 marks a notable progress in muscle-related treatments. Its unique approach, focusing on myostatin inhibition, presents a new avenue for improving muscle mass and strength.

While its primary focus is on treating muscle-wasting diseases, the wider implications of its muscle-building properties are extensive.

Continued research and clinical trials are essential to completely understand its potential and safely incorporate it into treatment plans.

Important Notice:

The information provided here about ACE-031 is for educational and informative purposes only. It is not meant as medical advice, diagnosis, or treatment recommendation. This document does not endorse the unauthorized or non-prescribed use of ACE-031 or any other experimental treatments.


1. Campbell C, McMillan HJ, Mah JK, Tarnopolsky M, Selby K, McClure T, Wilson DM, Sherman ML, Escolar D, Attie KM. Myostatin inhibitor ACE-031 treatment of ambulatory boys with Duchenne muscular dystrophy: Results of a randomized, placebo-controlled clinical trial. Muscle Nerve. 2017 Apr;55(4):458-464. doi: 10.1002/mus.25268. Epub 2016 Dec 23. PMID: 27462804.

2. Attie KM, Borgstein NG, Yang Y, Condon CH, Wilson DM, Pearsall AE, Kumar R, Willins DA, Seehra JS, Sherman ML. A single ascending-dose study of muscle regulator ACE-031 in healthy volunteers. Muscle Nerve. 2013 Mar;47(3):416-23. doi: 10.1002/mus.23539. Epub 2012 Nov 21. PMID: 23169607.

3. Cadena SM, Tomkinson KN, Monnell TE, Spaits MS, Kumar R, Underwood KW, Pearsall RS, Lachey JL. Administration of a soluble activin type IIB receptor promotes skeletal muscle growth independent of fiber type. J Appl Physiol (1985). 2010 Sep;109(3):635-42. doi: 10.1152/japplphysiol.00866.2009. Epub 2010 May 13. PMID: 20466801; PMCID: PMC2944638.

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