VCAM-1, the counter-receptor for integrin α4β1, is expressed by the BM endothelial and stromal cells (Simmons et al., 1992; Schweitzer et al., 1996) and participates in MM adhesion on BM endothelial cells (Okada et al., 1999; Parmo-Cabanas et al., 2004). The gene discussed is VCAM1; the disease is Miyoshi myopathy.