The primary objective of this study is to determine whether muscle atrophy induced by immobilization of the lower limb can be attenuated by BIIB023 in healthy male volunteers. The secondary objectives of this study in this study population are: * To determine whether muscle weakness induced by immobilization of the lower limb can be attenuated by BIIB023 * To assess the effect of BIIB023 on the recovery of muscle mass and strength after immobilization * To assess the effect of BIIB023 on histological markers of muscle atrophy and regeneration * To assess the effect of BIIB023 on muscle bioenergetics based on oxidative metabolism recovery kinetics * To evaluate the safety and tolerability of BIIB023
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
34
Intravenous (IV) infusions
Matched placebo
Research Site
Evansville, Indiana, United States
Percentage change in the magnitude of muscle atrophy
Time frame: between Day 14 and Day 42
Percentage change in the magnitude of muscle atrophy, measured by T1W-MRI analysis of the CSA of the triceps surae muscles of the immobilized limb
Time frame: between Day 14 and Day 42
Percentage change in isometric knee-extension strength (torque), measured by dynamometry
Time frame: between Day 14 and Day 42
Percentage change in isometric plantar-flexion strength (torque), measured by dynamometry
Time frame: between Day 14 and Day 42
Percentage change in total CSA of Type I and II fibers, measured by histological analysis of muscle biopsy
Time frame: between Day 14, Day 21, and Day 42
Change in density of satellite cells and other molecular markers of muscle regeneration, measured by histological analysis of muscle biopsy
Time frame: between Day 14, Day 21, and Day 42
Change in the recovery of muscle oxidative metabolism, measured by near-infrared spectroscopy (NIRS) of the quadriceps femoris muscles
Time frame: between Day 14 and Day 42
The number of participants that experience Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time frame: Day 156
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