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Phase II trial of upfront bevacizumab and temozolomide for unresectable or multifocal glioblastoma.

ABSTRACT: Patients with unresectable glioblastomas have a poor prognosis, with median survival of 6-10 months. We conducted a phase II trial of upfront 5-day temozolomide (TMZ) and bevacizumab (BV) in patients with newly diagnosed unresectable or multifocal glioblastoma. Patients received up to four cycles of TMZ at 200 mg/m(2) on days 1-5, and BV at 10 mg/kg on days 1 and 15 of a 28-day cycle. Brain magnetic resonance imaging (MRI) was performed monthly. Therapy was continued as long as there was no tumor progression, grade 4 nonhematologic toxicity, or recurrent grade 4 hematologic toxicity after dose reduction. The primary end point was best tumor response as measured on MRI. Forty-one patients were accrued over 12 months; 39 had a full set of MRI scans available for evaluation. Assessment for best radiographic responses was as follows: partial responses in 24.4%, stable disease in 68.3%, and progressive disease in 2.4%. Treatment-related toxicities included seven grade 4 toxicities and one grade 5 toxicity (myocardial infarction). From this study, it was concluded that an upfront regimen of TMZ and BV for unresectable glioblastoma was well tolerated and provided a significant level of disease stabilization. Therapeutic toxicities were consistent with those seen in the adjuvant setting using these agents. The upfront approach to treatment of glioblastoma in the unresectable population warrants further investigation in randomized controlled phase III trials.

SUBMITTER: Lou E

PROVIDER: S-EPMC3639657 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature

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Phase II trial of upfront bevacizumab and temozolomide for unresectable or multifocal glioblastoma.

Lou Emil E Peters Katherine B KB Sumrall Ashley L AL Desjardins Annick A Reardon David A DA Lipp Eric S ES Herndon James E JE Coan April A Bailey Leighann L Turner Scott S Friedman Henry S HS Vredenburgh James J JJ

Cancer medicine 20130124 2

Patients with unresectable glioblastomas have a poor prognosis, with median survival of 6-10 months. We conducted a phase II trial of upfront 5-day temozolomide (TMZ) and bevacizumab (BV) in patients with newly diagnosed unresectable or multifocal glioblastoma. Patients received up to four cycles of TMZ at 200 mg/m(2) on days 1-5, and BV at 10 mg/kg on days 1 and 15 of a 28-day cycle. Brain magnetic resonance imaging (MRI) was performed monthly. Therapy was continued as long as there was no tumo ...[more]

PMID: 23634286

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Project description:PurposeBevacizumab is associated with decreased vascular permeability that allows for more aggressive radiotherapy schedules. We conducted a phase II trial in newly diagnosed glioblastoma utilizing a novel hypofractionated stereotactic radiotherapy (HFSRT) schedule combined with temozolomide and bevacizumab.Experimental designPatients with tumor volume ≤60 cc were treated with HFSRT (6 × 6 Gy to contrast enhancement and 6 × 4 Gy to FLAIR hyperintensity with dose painting) combined with concomitant/adjuvant temozolomide and bevacizumab at standard doses. Primary endpoint was 1-year overall survival (OS): promising = 70%; nonpromising = 50%; α = 0.1; β = 0.1.ResultsForty patients were enrolled (median age: 55 years; methylated MGMT promoter: 23%; unmethylated: 70%). The 1-year OS was 93% [95% confidence interval (CI), 84-100] and median OS was 19 months. The median PFS was 10 months, with no pseudo-progression observed. The objective response rate (ORR) was 57%. Analysis of The Cancer Genome Atlas glioblastoma transcriptional subclasses (Nanostring assay) suggested patients with a proneural phenotype (26%) fared worse (ORR = 14%, vs. 77% for other subclasses; P = 0.009). Dynamic susceptibility-contrast perfusion MRI showed marked decreases in relative cerebral blood volume over time (P < 0.0001) but had no prognostic value, whereas higher baseline apparent diffusion coefficient (ADC) ratios and persistent hypermetabolism at the 6-month FDG-PET predicted poor OS (P = 0.05 and 0.0001, respectively). Quality-of-life (FACT-BR-4) and neuropsychological test scores were stable over time, although some domains displayed transient decreases following HFSRT.ConclusionsThis aggressive radiotherapy schedule was safe and more convenient for patients, achieving an OS that is comparable with historical controls. Analysis of advanced neuroimaging parameters suggests ADC and FDG-PET as potentially useful biomarkers, whereas tissue correlatives uncovered the poor prognosis associated with the proneural signature in non-IDH-1-mutated glioblastoma.

Project description:BACKGROUND: RANO criteria were applied to evaluate differences in response between the 2 arms: TMZ or TMZ + BEV in a randomized study. We evaluate here the RANO sub-criterion (PI) to evaluate response. METHODS: Between December 2009 and April 2013, p with unresectable GBM, PS < 3 and MMS ?25 were randomly assigned to receive eitherTMZ (200 mg/m2, days 1–5,for 2 28-day cycles), followed by standard TMZ with concomitant radiotherapy (60Gy) and then adjuvant TMZ for 6 cycles (TMZ Arm), or the same regimen but with the addition of BEV (10mg/kg /15 days) during pre-radiotherapy and concomitant treatment (BEV Arm). The primary endpoint was response according to RANO criteria after the 2 pre-radiotherapy cycles. The study was powered to detect a 30% difference between arms. A centralized revision of MRI's blinded to clinical status of p is ongoing. (ClinicalTrials.gov NCT01102595). RESULTS:103 p were registered and 93 randomized – 45 to the TMZ Arm and 48 to the BEV Arm. All p who received at least one dose of treatment were included in the analysis. Overall response rate (ORR) was evaluated after the 2-pre-radiotherapy cycles. Patients completed pre-radiotherapy treatment in 48.9% (TMZ Arm) vs 66.7% (BEV Arm), p = 0.08. Response was not evaluable in 3p (TMZ arm) and 5p (BEV arm) because of previous toxicity or refuse to continue. ORR by RANO criteria for evaluable p was: Arm TMZ: PR 3 (7.1%) SD 8 (19%) PD 31 (73.8%)., Arm B: PR 11 (25.6%) SD 17 (39.5%) 15 (34.9%) P = 0.001. Response by individual RANO sub criterion (Arm TMZ% vs Arm BEV%).1- MRI IP: PR (8.3 vs 26.2), SD (22.2 vs 42.8), P (69.4 vs 31) (P = 0.003), 2-Neurological status: SD (54.8 vs 79.5), No SD (45.2 vs 20.5) (P = 0.014), 3-Dexametasone dose: stable (60.5 vs 51.2), increase (28.9 vs 4.7), reduction (10.5 vs 44.2) (P < 0.001). CONCLUSION: ORR was significantly higher in the BEV Arm for both for general RANO criteria as for each individual criterion (MRI, clinical stability and dexametasone doses.

Project description:PurposeThis open-label, prospective, multicenter single-arm phase II study combined bevacizumab (BV) with radiation therapy (RT) and temozolomide (TMZ) for the treatment of newly diagnosed glioblastoma (GBM). The objectives were to determine the efficacy of this treatment combination and the associated toxicity.Patients and methodsSeventy patients with newly diagnosed GBM were enrolled between August 2006 and November 2008. Patients received standard RT starting within 3 to 6 weeks after surgery with concurrent administration of daily TMZ and biweekly BV. After completion of RT, patients resumed TMZ for 5 days every 4 weeks and continued biweekly BV. MGMT promoter methylation was assessed on patient tumor tissue. A University of California, Los Angeles/Kaiser Permanente Los Angeles (KPLA) control cohort of newly diagnosed patients treated with first-line RT and TMZ who had mostly received BV at recurrence was derived for comparison.ResultsThe overall survival (OS) and progression-free survival (PFS) were 19.6 and 13.6 months, respectively, compared to 21.1 and 7.6 months in the University of California, Los Angeles/KPLA control cohort, and 14.6 and 6.9 months in the European Organisation for Research and Treatment of Cancer-National Cancer Institute of Canada cohort. Correlation of MGMT promoter methylation and improved OS and PFS was retained in the study group. Comparative subset analysis showed that poor prognosis patients (recursive partitioning analysis class V/VI) may derive an early benefit from the use of first-line BV. Toxicity attributable to RT/TMZ was similar, and additional toxicities were consistent with those reported in other BV trials.ConclusionPatients treated with BV and TMZ during and after RT showed improved PFS without improved OS compared to the University of California, Los Angeles/KPLA control group. Additional studies are warranted to determine if BV administered first-line improves survival compared to BV at recurrence.

Dataset Information

Phase II trial of upfront bevacizumab and temozolomide for unresectable or multifocal glioblastoma.

Publications

Phase II trial of upfront bevacizumab and temozolomide for unresectable or multifocal glioblastoma.

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