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.

Abstract

Introduction: ACE-031 is a soluble form of activin receptor type IIB (ActRIIB). ACE-031 promotes muscle growth by binding to myostatin and other negative regulators of muscle mass.

Methods: This double-blind, placebo-controlled study evaluated the safety, pharmacokinetics, and pharmacodynamics of ACE-031 in 48 healthy, postmenopausal women randomized to receive 1 dose of ACE-031 (0.02-3 mg/kg s.c.) or placebo (3:1).

Results: ACE-031 was generally well-tolerated. Adverse events included injection site erythema. Mean ACE-031 AUC(0-∞) and C(max) increased linearly with dose; mean T(½) was 10-15 days. Statistically significant increases in mean total body lean mass (3.3%; P = 0.03, by DXA) and thigh muscle volume (5.1%; P = 0.03, by MRI) were observed at day 29 in the 3 mg/kg group. Statistically significant changes in serum biomarkers suggest ACE-031 also improved bone and fat metabolism.

Conclusions: Single-dose ACE-031 treatment was generally well-tolerated and resulted in increases in muscle mass in healthy postmenopausal women.

Publication types

  • Clinical Trial, Phase I
  • Randomized Controlled Trial

MeSH terms

  • Absorptiometry, Photon
  • Activin Receptors, Type II / administration & dosage
  • Activin Receptors, Type II / pharmacology*
  • Adipose Tissue / drug effects
  • Aged
  • Biomarkers
  • Body Composition / drug effects
  • Bone Density
  • Cohort Studies
  • Dose-Response Relationship, Drug
  • Double-Blind Method
  • Endpoint Determination
  • Female
  • Follicle Stimulating Hormone / blood
  • Humans
  • Magnetic Resonance Imaging
  • Middle Aged
  • Pharmaceutical Solutions

Substances

  • Biomarkers
  • Pharmaceutical Solutions
  • Follicle Stimulating Hormone
  • ACVR2B protein, human
  • Activin Receptors, Type II