MME and acute lymphoblastic leukemia: Neprilysin (NEP), also known as CALLA (common acute lymphocytic leukaemia (ALL) antigen), enkephalinase, neutral endopeptidase 24.11, membrane metalloendopeptidase (MME) and CD10 antigen [35–37], belongs to the family of M13 zinc-metalloendopeptidases [38].