Table 2.
Signals in muscle satellite cell niche
| Signal | Source | Receptor | Function |
| HGF | ECM | c-Met | Activation |
| bFGF | ECM/SC | FGFR | Proliferation |
| IGF-1 | Circulation/ECM | IGFR-1 | Proliferation |
| Myostatin | Circulation/SC | ACVR-2 | Self-renewal |
| Wnt | ECM | Frizzled | Cell fate |
| BDNF | SC | P75NTR | No differentiation |
| Calcitonin | Circulation | CTR | Quiescence |
| SDF-1 | Myofiber | CXCR4 | Migration |
| EGF | ECM | ErbBR | Activation |
| TWEAK | Macrophage | Fn14 | Proliferation |
| NO | Myofiber | No receptor | Quiescence |
| Delta-1 | SC | Notch | Self-renewal |
| VLA4 | Myofiber | VCAM | Fusion |
| Laminin | Basal lamina | Integrin | Quiescence |
| M-cadherin | Myofiber | M-cadherin | Fusion |
In this table the factors that play a role in muscle SCs quiescence, activation and differentiation are reported, with indicated the source, the receptor that they interact with and their function.