GPR17 and myeloid sarcoma: This effect could have important translational relevance since GPR17, a G protein-coupled receptor which is physiologically down-regulated after the immature oligodendrocyte stage, has been identified as an ideal target for new regenerative therapeutic approaches for MS and other myelin-associated disorders (Fancy et al. 2010; Fumagalli et al. 2017; Lu et al. 2018).