ttfields together with temozolomide and radiotherapy in patients with newly diagnosed gbm

Conditions: Glioblastoma Multiforme

Summary: the study is a prospective, single arm open label study, designed to test the to evaluate the tolerability and safety outcome of newly diagnosed gbm patients treated with novottf-200a concomitant to radiotherapy/temozolomide followed by temozolomide. the device is a portable, battery operated device for chronic administration of alternating electric fields (termed ttfields or ttf) to the region of the malignant tumor, by means of surface, insulated electrode arrays.

past clinical experience: a phase iii trial of optune® (200 khz) as monotherapy compared to active chemotherapy in recurrent glioblastoma patients showed ttfields to be equivalent to active chemotherapy in extending survival, associated with minimal toxicity, good quality of life, and activity within the brain (14% response rate). in addition, a phase iii trial of optune® combined with maintenance temozolomide compared to maintenance temozolomide alone has shown that combined therapy led to a significant improvement in both progression free survival and overall survival in patients with newly diagnosed glioblastoma without the addition of high grade toxicity and without decline in quality of life. description of the trial: all patients included in this trial are newly diagnosed gbm patients who underwent a biopsy or surgery. in addition, all patients must meet all eligibility criteria. eligible patients will be enrolled to receive radiotherapy(rt)/temozolomide/novottf-200a followed by maintenance tmz and novottf-200a. baseline tests will be performed, the patients will be treated continuously with the device until second progression. they will possibly receive a second line treatment that can be one of the following: re-operation, local radiotherapy (gamma-knife), a second line of chemotherapy or a combination of the above. novottf-200a treatment will consist of wearing four electrically insulated electrode arrays on the head. electrode array placement will require shaving of the scalp before and frequently during the treatment. after an initial short visit to the clinic for training and monitoring, patients will be released to continue treatment at home where they can maintain their regular daily routine. during rt, patients will be seen twice a week and the arrays will be removed to inspect the skin condition. in addition during the trial, patients will need to return once every month to the clinic where an examination by a physician and a routine laboratory examinations will be done. these routine visits will continue for as long as the patient's disease is not progressing for the second time under the study treatment. if such occurs, patients will need to return once per month for two more months to the clinic for similar follow up examinations. during the visits to the clinic patients will be examined physically and neurologically. additionally, routine blood tests will be performed. a routine mri of the head will be performed at baseline and every second month thereafter, until second progression. after this follow up plan, patients will be contacted once per month by telephone to answer basic questions about their health status. scientific background: electric fields exert forces on electric charges similar to the way a magnet exerts forces on metallic particles within a magnetic field. these forces cause movement and rotation of electrically charged biological building blocks, much like the alignment of metallic particles seen along the lines of force radiating outwards from a magnet. electric fields can also cause muscles to twitch and if strong enough may heat tissues. ttfields are alternating electric fields of low intensity. this means that they change their direction repetitively many times a second. since they change direction very rapidly (200 thousand times a second), they do not cause muscles to twitch, nor do they have any effects on other electrically activated tissues in the body (brain, nerves and heart). since the intensities of ttfields in the body are very low, they do not cause heating. the breakthrough finding made by novocure was that finely tuned alternating fields of very low intensity, now termed ttfields (tumor treating fields), cause a significant slowing in the growth of cancer cells. due to the unique geometric shape of cancer cells when they are multiplying, ttfields cause electrically-charged cellular components of these cells to change their location within the dividing cell, disrupting their normal function and ultimately leading to cell death. in addition, cancer cells also contain miniature building blocks which act as tiny motors in moving essential parts of the cells from place to place. ttfields interfere with the normal orientation of these tiny motors related to other cellular components since they are electrically-charged as well. as a result of these two effects, tumor cell division is slowed, results in cellular death or reverses after continuous exposure to ttfields. other cells in the body (normal healthy tissues) are affected much less than cancer cells since they multiply at a much slower rate if at all. in addition ttfields can be directed to a certain part of the body, leaving sensitive areas out of their reach. finally, the frequency of ttfields applied to each type of cancer is specific and may not damage normally dividing cells in healthy tissues.

Eligibility criteria:
inclusion criteria: 1. histologically confirmed diagnosis of gbm according to who classification criteria. 2. supratentorial tumor location 3. age ≥ 18 years 4. recovered from maximal debulking surgery, if applicable (gross total resection, partial resection and biopsy-only patients are all acceptable) 5. planned standard adjuvant chemoradiotherapy of approx. 60 gy of radiotherapy (rt), or biologically equivalent dose, according to local practice, and concomitant temozolomide (tmz) chemotherapy (75mg/m\^2 daily). any other cytotoxic or biologic anti-tumor therapy received prior to enrollment will be considered an exclusion. 6. planned treatment with adjuvant/maintenance tmz (150-200 mg/m\^2 daily x 5 d, q28 days) 7. karnofsky performance status ≥ 70 8. life expectancy ≥ 3 months 9. participants of childbearing age must use effective contraception. 10. all patients must sign written informed consent. 11. novottf-200a treatment start date at least 2 weeks out from brain surgery. 12. novottf-200a treatment start prior to or at the beginning of rt/tmz 13. stable or decreasing dose of corticosteroids for the last 7 days prior to enrollment, if applicable. exclusion criteria: 1. participation in another clinical treatment trial 2. pregnancy or breast feeding 3. significant co-morbidities at baseline which would preclude tmz treatment 4. implanted pacemaker, programmable shunts, defibrillator, deep brain stimulator, other implanted electronic devices in the brain, or documented clinically significant arrhythmias. 5. infra-tentorial tumor location 6. evidence of increased intracranial pressure (midline shift \> 5mm, clinically significant papilledema, vomiting and nausea or reduced level of consciousness) 7. history of hypersensitivity reaction to tmz or a history of hypersensitivity to dtic. 8. known allergies to medical adhesives or gel

Keywords: gbm ttfields tumor treating fields glioblastoma glioblastoma multiforme