Extracellular matrix proteins and muscle satellite cells

The interaction between extracellular matrix (ECM) proteins and muscle satellite cells defines the myogenic niche, a specialized microenvironment critical for skeletal muscle regeneration. Satellite cells, the primary stem cells of adult muscle, reside in a quiescent state beneath the basal lamina, where they are in direct contact with ECM components like laminin-211, collagen IV, and various proteoglycans (Yin et al., 2013, PMID: 23543518). These proteins provide essential mechanical and chemical signals that govern the transition of satellite cells from quiescence to activation and eventually to differentiation into new muscle fibers (Baghdadi & Tajbakhsh, 2018, PMID: 29431119). Dysregulation of this niche is a hallmark of diseases such as Duchenne muscular dystrophy and age-related sarcopenia, where excessive ECM deposition (fibrosis) or loss of structural integrity impairs the regenerative capacity of satellite cells (Mahdy, 2019, PMID: 30704412). Although individual components like integrins or TGF-beta are targeted by experimental drugs, the 'ECM proteins and muscle satellite cells' entity is a complex biological system rather than a single druggable receptor or enzyme.

Other names

Muscle satellite cell nicheMyogenic stem cell microenvironmentBasal lamina-satellite cell complexSatellite cell-ECM interface

Not applicable as this refers to a multi-component biological niche rather than a single drug target molecule.