Pilot Study of a Metabolic Nutritional Therapy for the Management of Primary Brain Tumors (Ketones)

• MRI imaging will be used to measure changes in brain tumor size. [ Time Frame: 6 weeks after completion of radiation therapy ] [ Designated as safety issue: No ]
  Results of the metabolic therapy will be assessed by comparing MRI images obtained at the beginning of the study with those after completion of radiation therapy and after an additional 6 weeks of metabolic therapy.
  
  

Other: Energy restricted Ketogenic Diet (ERKD) (Metabolic Nutritional Therapy)
Adult subjects with newly diagnosed glioblastoma will be referred to the study. Residual tumor size will be determined using MRI imaging. Subjects will be placed on ERKD while they are being treated with radiation therapy and standard of care chemotherapy. After completion of radiation therapy, tumor size will be determined using MRI. If the tumor has decreased in size or remained the same (stable disease), the subjects will be continued on the ERKD for an additional 6 weeks. Total calories consumed by each subject will be targeted to 20 to 25 kcal/kg/day. If the tumor has decreased in size or the size has remained the same then subjects will be continued on the ERKD for as additional 6 weeks and a repeat MRI will be obtained.
Other Name: Ketogenic diet

Summary: The current standard of care for glioblastoma multiforme (GBM), the most common primary brain tumor in adults, includes surgical resection, radiation and chemotherapy. Survival rarely exceeds 18 months. The investigators propose to test the hypothesis that brain tumor cells are unable to utilize ketones as a source of energy when deprived of glucose, due to mitochondrial dysfunction, whereas normal glia and neurons can survive this metabolic stress. A nutritionally adequate but energy restricted, ketogenic diet (ERKD) to deprive brain tumors of energy and resulting in death of glioma cells is promising. ERKD-based therapy to manage brain cancer is both biologically plausible and supported by data in animal models. A multidisciplinary team of oncologists, registered dietitians, and physiologists will implement an ERKD therapy in newly diagnosed GBM subjects. After initial maximal tumor excision, ERKD therapy will be initiated for subjects during a one week inpatient admission to Sparrow Hospital or as a local outpatient and supervised by registered dietitians experienced in implementing this therapy.The ERKD will continue as adjunctive therapy along with radiation therapy and standard of care chemotherapy. The supervised ERKD will continue for an additional 6 weeks after completion of radiation therapy along with the standard of care chemotherapy. The objective of this trial is to determine whether the ERKD decreases tumor size or results in no recurrence in individuals with GBM as measured by serial MRI imaging. Enzymes and signaling pathways that regulate metabolism and cell growth will be assessed in initial and post-ERKD tumors using standard biochemical approaches.