Feasibility of real-time molecular profiling for patients with newly diagnosed glioblastoma without MGMT promoter hypermethylation—the NCT Neuro Master Match (N2M2) pilot study

Abstract BACKGROUND Tumor Treating Fields (TTFields) are a non-invasive, loco-regional, anti-mitotic treatment consisting of low intensity alternating electric fields. The combination of TTFields with maintenance temozolomide significantly improved survival versus temozolomide alone in the phase 3 EF-14 study in newly diagnosed glioblastoma (ndGBM). In preclinical studies, TTFields increased the number of glioma cells undergoing cellular death following radiotherapy (RT) by inhibiting DNA damage repair, suggesting a radio-sensitizing effect of TTFields. This pilot study is the first to evaluate the safety and feasibility of administering TTFields concomitant to RT and TMZ in ndGBM patients. MATERIAL AND METHODS Patients diagnosed with ndGBM were treated with TTFields/RT/TMZ followed by maintenance TMZ and TTFields for up to 24 months. TTFields (200kHz) were delivered for >18 hours/day while the transducer arrays were removed during delivery of RT. TMZ was administered at a dose of 75 mg/m2/daily for 6 weeks and RT at a total dose of 60 Gy. The primary endpoint was safety of the combined TTFields/RT/TMZ; secondary endpoints included progression-free survival (PFS), overall survival (OS) and toxicity. Adverse events (AEs) were graded according to CTCAE V4.0. RESULTS 10 ndGBM patients that recovered from maximal debulking surgery or biopsy were enrolled at a single center in Israel between April and December 2017. Five patients (50%) had undergone gross total resection while the rest had biopsy only. Eight of the patients were male, median age was 59, median KPS was 80 and median dose of RT was 60 Gy. Six patients (60%) reported at least one AE. The most common AE was TTFields-related skin toxicity, reported in four patients (40%), all of which were grade 1–2 in severity. Two patients reported serious AEs (seizures and general deterioration) that were considered unrelated to TTFields. Median PFS with RT/TMZ/TTFields was 10.5 months. Median OS has not yet been reached. CONCLUSION The proportion of patients with TTFields-related skin toxicity was similar to that reported in ndGBM patients in the randomized Phase III study (52%), where patients started TTFields at least 4 weeks after RT. No other TTFields-related toxicities were reported and there were no increase in RT- or TMZ-related toxicities as a result of combining TTFields with RT in addition to TMZ. Based on the safety and preliminary efficacy results of this pilot study, a phase II randomized study has been initiated to investigate the efficacy of concomitant RT/TMZ/TTFields in 60 ndGBM patients.

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CTNI-43. ANLOTINIB COMBINED WITH STUPP REGIMEN IN TREATING PATIENTS WITH NEWLY DIAGNOSED GLIOBLASTOMA MULTIFORME: A PHASE II PILOT STUDY

Neuro-Oncology ◽

10.1093/neuonc/noaa215.209 ◽

2020 ◽

Vol 22 (Supplement_2) ◽

pp. ii52-ii52

Author(s):

Shuzhen Lai ◽

Yuanyuan Chen

Keyword(s):

Pilot Study ◽

Glioblastoma Multiforme ◽

Adjuvant Therapy ◽

Disease Progression ◽

Phase Ii ◽

Signal Pathways ◽

Severe Toxicity ◽

Newly Diagnosed ◽

Newly Diagnosed Glioblastoma ◽

Grade 3

Abstract PURPOSE Anlotinib, an orally multi-target tyrosine kinase inhibitor, inhibits tumor angiogenic and proliferative signal pathways. We performed a phase II trial of anlotinib in combination with the STUPP regimen in patients with newly diagnosed glioblastoma multiforme（GBM）to determine whether the combination therapy would safely improve outcomes in this group of patients. An initial pilot study assessed interim safety and tolerability. METHODS AND MATERIALS Ten newly diagnosed GBM patients were included in this study. All patients received standard radiation of 60 Gy in 30 fractions starting within 4–6 weeks after surgery with concurrent TMZ (daily, 75 mg/m2) and anlotinib (8mg per day, from day 1 to 14, every 3 weeks). After a 4-week break, adjuvant therapy including 6 cycles of TMZ (150–200 mg/m², from day 1 to 5, every 4 weeks) and 8 cycles of anlotinib (8mg per day, from day 1 to 14, every 3 weeks) was given. For patients completing adjuvant therapy, anlotinib alone (8mg per day, from day 1 to 14, every 3 weeks) was administrated until disease progression. RESULTS All patients completed concurrent chemo-radiotherapy without interruption. One patient developed grade 3 weight loss at 56th week and grade 3 presumed radiation-induced cognitive disturbance at 60th week. Fatigue and hypertension were frequently observed during treatment, which potentially be related to the treatment. No severe toxicity was observed in other patients. Up to this writing, none of these patients developed disease progression. CONCLUSION Anlotinib combined with the STUPP regimen is a potential choice for newly diagnosed GBM patients. It is well tolerated and the toxicity is manageable. It’s acceptable to continue enrolling of this Phase II study.

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