Disclosed herein are methods of treating, diagnosing, and prognosing GLUT-dependent cancers and OXPHOS-dependent cancers. In some embodiments, the methods comprise administering to a patient in need thereof a GLUT inhibitor and/or an OXPHOS inhibitor. The inhibitors may be administered before, concurrently, or after one another. Suitable GLUT-dependent cancers may include a GLUT4-dependent cancer, a GLUT8-dependent cancer, and a GLUT11-dependent cancer. Suitable GLUT inhibitors may include a GLUT4 inhibitor, a GLUT8 inhibitor, and a GLUT11 inhibitor. Suitable OXPHOS-dependent cancers may include mitochondrial OXPHOS-dependent cancers, including cancers that have developed resistance to treatment with a GLUT-inhibitor.