PML and acute promyelocytic leukemia: The general interest in PML-NBs originated from the tight link between PML-NB integrity and several pathological conditions such as acute promyelocytic leukemia (APL), neurodegenerative diseases as well as viral infections, and resulted in a large number of publications implicating PML-NBs in diverse cellular processes (Tavalai and Stamminger, 2008; Grimwade and Solomon, 1997; Yasuda et al., 1999).