What is the role of dystrophin in skeletal muscle function?

Dystrophin is a crucial protein that links the cytoskeleton of muscle fibers to the extracellular matrix, providing structural stability to the muscle cell membrane during contraction and relaxation. It helps protect muscle cells from damage caused by mechanical stress. In the absence of dystrophin, as seen in conditions like Duchenne muscular dystrophy, muscle fibers become more susceptible to injury, leading to progressive muscle weakness and degeneration. Thus, dystrophin is vital for maintaining muscle integrity and function.