期刊
ONCOTARGET
卷 8, 期 59, 页码 100931-100941出版社
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.21753
关键词
glioma; radioresistance; signaling pathway; microRNA; glioma stem cells
Gliomas originate from glial cells and are the most frequent primary brain tumors. High-grade gliomas occur similar to 4 times more frequently than low-grade gliomas, are highly malignant, and have extremely poor prognosis. Radiotherapy, sometimes combined with chemotherapy, is considered the treatment of choice for gliomas and is used after resective surgery. Despite great technological improvements, the radiotherapeutic effect is generally limited, due to the marked radioresistance exhibited by gliomas cells, especially glioma stem cells (GSCs). The mechanisms underlying this phenomenon are multiple and remain to be fully elucidated. This review attempts to summarize current knowledge on the molecular basis of glioma radioresistance by focusing on signaling pathways, microRNAs, hypoxia, the brain microenvironment, and GSCs. A thorough understanding of the complex interactions between molecular, cellular, and environmental factors should provide new insight into the intrinsic radioresistance of gliomas, potentially enabling improvement, through novel concurrent therapies, of the clinical efficacy of radiotherapy.
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