CXCR4 and Miyoshi myopathy: MM cells express the chemokine receptor CXCR4 and its ligand SDF-1α controls their α4β1-mediated adhesion to the vascular adhesion molecule 1 (VCAM-1), fibronectin and endothelial cells as well as their transendothelial migration and homing in the BM [43, 44].