期刊
SCIENCE ADVANCES
卷 8, 期 25, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abn3471
关键词
-
资金
- Georgetown University Medical Center (GUMC) Dean for Research's Toulmin Pilot Project Award
- Partners in Research Breakthrough Award
- NIH [P30 CA051008, R01 CA256481, K00 CA234799, T32 CA009686, R01 NS115403, R01 HG010538, 1R44TR001916-02, 1U24DK116204-01]
- Medical Center Graduate Student Organization
- Intramural Research Program, National Heart, Lung, and Blood Institute, National Institutes of Health
- Malnati Brain Tumor Institute of Northwestern Medicine
- Caroline Fund
- Structural Genomics Consortium
- AbbVie [1097737]
- Bayer Pharma AG
- Boehringer Ingelheim
- Canada Foundation for Innovation
- Eshelman Institute for Innovation
- Genentech
- Genome Canada through Ontario Genomics Institute [OGI-196]
- EU/EFPIA/OICR/McGill/KTH/Diamond Innovative Medicines Initiative 2 Joint Undertaking [875510]
- Janssen
- Merck KGaA
- Merck Sharp and Dohme
- Novartis Pharma AG
- Pfizer
- Sao Paulo Research Foundation-FAPESP
- Takeda
- Wellcome Trust
- UNC Lineberger Comprehensive Cancer Center
- PharmAlliance
Temozolomide (TMZ) is a chemotherapeutic agent used for the treatment of glioblastoma (GBM), but TMZ resistance is common. This study identified guanine mutations and splice site changes in TMZ-resistant GBM that disrupt G-rich DNA G-quadruplexes and alternative splicing. The vulnerabilities created by these alterations can be targeted by G-quadruplex stabilizers or a splicing kinase inhibitor. Furthermore, cytoplasmic aggregates of the RNA binding protein EWSR1 were observed in TMZ-resistant GBM, suggesting it may serve as a biomarker.
Temozolomide (TMZ) is a chemotherapeutic agent that has been the first-line standard of care for the aggressive brain cancer glioblastoma (GBM) since 2005. Although initially beneficial, TMZ resistance is universal and second-line interventions are an unmet clinical need. Here, we took advantage of the known mechanism of action of TMZ to target guanines (G) and investigated G-rich G-quadruplex (G4) and splice site changes that occur upon TMZ resistance. We report that TMZ-resistant GBM has guanine mutations that disrupt the G-rich DNA G4s and splice sites that lead to deregulated alternative splicing. These alterations create vulnerabilities, which are selectively targeted by either the G4-stabilizing drug TMPyP4 or a novel splicing kinase inhibitor of cdc2-like kinase. Last, we show that the G4 and RNA binding protein EWSR1 aggregates in the cytoplasm in TMZ-resistant GBM cells and patient samples. Together, our findings provide insight into targetable vulnerabilities of TMZ-resistant GBM and present cytoplasmic EWSR1 as a putative biomarker.
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