ST14 and mantle cell lymphoma: In this study we show that a novel anti-matriptase antibody toxin (Monomethyl auristatin-E, MMAE) conjugate potently inhibited growth of mantle cell lymphoma cell lines (JeKo-1, Maver, Mino and Z138) and caused significant growth inhibition of the JeKo-1 xenograft in vivo.