HGF and plasma cell myeloma: It is known that HGF/c‐met signaling promotes the adhesion and migration of myeloma cells by stimulating multiple downstream pathways including PI3K/AKT and Ras/ERK.25 To confirm that SL1‐mediated effects are a result of HGF/c‐met pathway inhibition, we investigated the effects of SL1 on the expression levels of p‐c‐met (Y1349), p‐ERK and p‐AKT after stimulating with HGF.