Skeletal muscle cell

Skeletal muscle cells, also known as myocytes or muscle fibers, are specialized contractile cells that form the skeletal muscles responsible for voluntary movement and posture. These cells are characterized by their long, cylindrical, multinucleated structure and a striated appearance caused by the organized arrangement of sarcomeres containing actin and myosin filaments [1]. They function by converting chemical energy from ATP into mechanical work following stimulation by motor neurons at the neuromuscular junction [2]. While skeletal muscle cells represent a biological tissue component rather than a single molecular target, they house numerous specific therapeutic targets such as ion channels, G protein-coupled receptors, and structural proteins [3]. Pathological conditions affecting these cells include genetic disorders like Duchenne muscular dystrophy, autoimmune diseases like myasthenia gravis, and age-related sarcopenia [4]. Pharmacological intervention typically involves modulating neuromuscular transmission, calcium signaling, or metabolic pathways within the cell to treat spasticity, weakness, or wasting [5]. For example, neuromuscular blockers target the nicotinic receptors on the cell surface, while dantrolene acts on internal calcium release channels [5]. Understanding the physiology of these cells is crucial for developing treatments for both primary muscle diseases and systemic metabolic conditions.

Other names

MyocyteMuscle fiberRhabdomyocyteStriated muscle cell

Drugs interact with skeletal muscle cells by modulating neuromuscular junction signaling (e.g., nicotinic acetylcholine receptor antagonism), regulating intracellular calcium homeostasis (e.g., ryanodine receptor modulation), or activating anabolic pathways (e.g., androgen receptor agonism).