Tests metformin alongside standard treatment in adults with glioblastoma

Who can take part

• Patients with newly diagnosed histologically confirmed GBM (WHO grade IV, IDH wild type) undergoing surgical resection
• Hypomethylation or hypermethylation of MGMT evaluated post-surgery
• Adult patients (=18 years), both sexes
• Patients undergoing Stupp protocol including patients aged >70 years performing hypofractionated protocol and three weeks of chemotherapy
• Karnofsky Performance Status (KPS) > 60 assessed post-surgery
• Life expectancy at least 6 months defined by tumor lesion size and location
• Freely given written informed consent prior to any study-related activity. Patients must be able to communicate with the investigator and comply with study procedures
• Women of childbearing age must test negative for pregnancy at enrollment and, if they have sex, must agree to use specific contraceptive methods. Female subjects of childbearing age, i.e., fertile, after menarche and until post-menopause unless permanently infertile, who are sexually active, must apply a highly effective method of birth control with a low failure rate (i.e., less than 1 percent per year), such as combined hormonal contraception (containing estrogen and progestin) combined with ovulation inhibition (oral intravaginal, or transdermal), progestin-only hormonal contraception associated with ovulation inhibition (oral, injectable, or implantable), intrauterine device (IUD), intrauterine hormone delivery system (IUS), bilateral tubal occlusion, vasectomized partner, or sexual abstinence, throughout the treatment period and for four weeks after the last dose of the study treatment. Hormonal methods other than levonorgestrel-containing devices or medroxyprogesterone injections should be supplemented with the use of a male condom. Women of nonfertile age may be included if surgically sterile or postmenopausal for at least 2 years. The investigator is responsible for determining whether the patient has adopted an appropriate method of contraception for participation in the study
• Male subjects with female partners of childbearing age must use condoms during treatment and until the end of relevant systemic exposure

Who cannot take part

• Patients diagnosed with diabetes or diabetes-related conditions
• Other active malignancies
• Hypersensitivity, intolerance to metformin or excipients
• The patient has serious pre-existing medical conditions that, in the opinion of the investigator, would preclude participation in this study
• Impaired renal function with creatinine clearance < 60 mL/min assessed at recruitment; liver failure assessed at recruitment by clinical history and examination of ALT, AST and total bilirubin; and other contraindications to metformin use
• Multicenter GBMs
• Taking metformin, insulin or other biguanides, regardless of the reason
• Pregnancy or lactation