A positive correlation between TGF-β levels, FAPs content and fibrosis has been observed in different muscle injuries and diseases such as denervation [66], glycerol-induced injury [66], amyotrophic lateral sclerosis (hSOD1G93A mice) [96] and DMD (mdx mice and DMD patients) [97–99]. Here, TGFB1 is linked to Duchenne muscular dystrophy.