Cell-intrinsic, Bmal1-dependent Circadian Regulation of Temozolomide Sensitivity in Glioblastoma.

Cell-intrinsic, Bmal1-dependent Circadian Regulation of Temozolomide Sensitivity in Glioblastoma.
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DOI:
10.1177/0748730417696788
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发表时间:
2017-04
影响因子:
3.5
通讯作者:
Rubin JB
Rubin JB
中科院分区:
生物学3区
文献类型:
--
作者:
Slat EA;Sponagel J;Marpegan L;Simon T;Kfoury N;Kim A;Binz A;Herzog ED;Rubin JB

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化疗药物的安全性和有效性可能会随着一天中给药时间的不同而变化。本研究旨在通过测试 DNA 烷化剂替莫唑胺 (TMZ) 的疗效是否随给药时间的变化而变化,从而改善最常见脑癌胶质母细胞瘤 (GBM) 的治疗。我们在人类和小鼠 GBM 细胞中发现了细胞固有的日常节律。治疗的昼夜节律时间影响小鼠 GBM 肿瘤细胞的体外 TMZ 敏感性。 TMZ 诱导的最大 DNA 损伤反应、细胞凋亡激活和生长抑制发生在核心时钟基因 Bmal1 表达的每日峰值附近。 Bmal1 (Arntl) 的缺失消除了基因表达的昼夜节律以及 TMZ 诱导的细胞凋亡和生长抑制的激活。这些数据表明肿瘤细胞固有的昼夜节律对于 GBM 肿瘤来说是常见的,并且可以调节 TMZ 的细胞毒性。应在前瞻性临床试验中评估通过按每日节律定时服用 TMZ 来优化 GBM 治疗。
The safety and efficacy of chemotherapeutics can vary as a function of the time of their delivery during the day. This study aimed to improve the treatment of glioblastoma (GBM), the most common brain cancer, by testing whether the efficacy of the DNA alkylator temozolomide (TMZ) varies with the time of its administration. We found cell-intrinsic, daily rhythms in both human and mouse GBM cells. Circadian time of treatment impacted TMZ sensitivity of murine GBM tumor cells in vitro. The maximum TMZ-induced DNA damage response, activation of apoptosis and growth inhibition occurred near the daily peak in expression of the core clock gene Bmal1. Deletion of Bmal1 (Arntl) abolished circadian rhythms in gene expression and TMZ-induced activation of apoptosis and growth inhibition. These data indicate that tumor cell-intrinsic circadian rhythms are common to GBM tumors and can regulate TMZ cytotoxicity. Optimization of GBM treatment by timing TMZ administration to daily rhythms should be evaluated in prospective clinical trials.
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