期刊
NEURO-ONCOLOGY
卷 23, 期 4, 页码 677-686出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/neuonc/noaa260
关键词
bevacizumab; hypofractionated stereotactic re-irradiation; PD-L1; pembrolizumab; recurrent high-grade glioma
资金
- Merck and Moffitt Foundation
The combination of hypofractionated stereotactic irradiation (HFSRT) with pembrolizumab and bevacizumab is generally safe and well tolerated in patients with recurrent high-grade gliomas. In patients without prior bevacizumab treatment, 83% showed complete or partial response, while in bevacizumab-resistant patients, 62% achieved partial response. This treatment approach warrants further investigation for its potential in improving outcomes for high-grade glioma patients.
Background. Radiotherapy may synergize with programmed cell death 1 (PD1)/PD1 ligand (PD-L1) blockade. The purpose of this study was to determine the recommended phase II dose, safety/tolerability, and preliminary efficacy of combining pembrolizumab, an anti-PD1 monoclonal antibody, with hypofractionated stereotactic irradiation (HFSRT) and bevacizumab in patients with recurrent high-grade gliomas (HGGs). Methods. Eligible subjects with recurrent glioblastoma or anaplastic astrocytoma were treated with pembrolizumab (100 or 200 mg based on dose level Q3W) concurrently with HFSRT (30 Gy in 5 fractions) and bevacizumab 10 mg/kg Q2W. Results. Thirty-two patients were enrolled (bevacizumab-naive, n = 24; bevacizumab-resistant, n = 8). The most common treatment-related adverse events (TRAEs) were proteinuria (40.6%), fatigue (25%), increased alanine aminotransferase (25%), and hypertension (25%). TRAEs leading to discontinuation occurred in 1 patient who experienced a grade 3 elevation of aspartate aminotransferase. In the bevacizumab-naive cohort, 20 patients (83%) had a complete response or partial response. The median overall survival (OS) and progression-free survival (PFS) were 13.45 months (95% CI: 9.46-18.46) and 7.92 months (95% CI: 6.31-12.45), respectively. In the bevacizumab-resistant cohort, PR was achieved in 5 patients (62%). Median OS was 9.3 months (95% CI: 8.97-18.86) with a median PFS of 6.54 months (95% CI: 5.95-18.86). The majority of patients (n = 20/26; 77%) had tumor-cell/tumor-microenvironment PD-L1 expression <1%. Conclusions. The combination of HFSRT with pembrolizumab and bevacizumab in patients with recurrent HGG is generally safe and well tolerated. These findings merit further investigation of HFSRT with immunotherapy in HGGs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据