In addition, a novel mitochondrial inner membrane protein, mitochondrial fission protein 1 (MTFP1), also known as MTP18, has been discovered to be essential for maintaining mitochondrial integrity, and has consequently been implicated in the regulation of mitochondrial fragmentation in cardiac myocytes and cancer cells (Tondera et al., 2005; Aung et al., 2017). Here, MTFP1 is linked to cancer.