BECN1 and cancer: An example is beclin-1 (the protein indispensable in the membrane nucleation—phagophore formation stage, as well as autophagosome maturation [55]) being attenuated in some cancers, such as breast [57,58], ovarian [57,59], prostate [57], cervical [60], lung [61], liver [62,63] cancer, osteosarcoma [64], and glioblastoma [65].