HIF1α regulates single differentiated glioma cell dedifferentiation to stem-like cell phenotypes with high tumorigenic potential under hypoxia

被引:45
作者
Wang, Pan [1 ]
Lan, Chuan [1 ]
Xiong, Shuanglong [2 ]
Zhao, Xiuwen [1 ]
Shan, You'an [1 ]
Hu, Rong [1 ]
Wan, Wenwu [1 ]
Yu, Shuangjiang [1 ]
Liao, Bin [1 ]
Li, Guangzhi [1 ]
Wang, Junwei [1 ]
Zou, Dewei [1 ]
Chen, Bing [3 ]
Feng, Hua [1 ]
Wu, Nan [1 ]
机构
[1] Third Mil Med Univ, Southwest Hosp, Dept Neurosurg, Chongqing 400038, Peoples R China
[2] Canc Hosp, Dept Oncol, Chongqing 400030, Peoples R China
[3] Third Mil Med Univ, Xinqiao Hosp, Dept Neurosurg, Chongqing 400038, Peoples R China
基金
中国国家自然科学基金;
关键词
glioblastoma multiforme; hypoxia; dedifferentiation; glioma stem cell; HIF1; alpha; PERIVASCULAR NICHE; GLIOBLASTOMA CELLS; GENE-EXPRESSION; CANCER-CELLS; IN-VITRO; TUMOR; GROWTH; HIF-1-ALPHA; IDENTIFICATION; CHEMOTHERAPY;
D O I
10.18632/oncotarget.15888
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The standard treatment for Glioblastoma multiforme (GBM) is surgical resection and subsequent radiotherapy and chemotherapy. Surgical resection of GBM is typically restricted because of its invasive growth, which results in residual tumor cells including glioma stem cells (GSCs) and differentiated cells. Recurrence has been previously thought to occur as a result of these GSCs, and hypoxic microenvironment maintains the GSCs stemness also plays an important role. Summarizing traditional studies and we find many researchers ignored the influence of hypoxia on differentiated cells. We hypothesized that the residual differentiated cells may be dedifferentiated to GSC-like cells under hypoxia and play a crucial role in the rapid, high-frequency recurrence of GBM. Therefore, isolated CD133-CD15-NESTIN-cells were prepared as single-cell culture and treated with hypoxia. More than 95% of the surviving single differentiated CD133(-)CD15(-)NESTIN(-) cell dedifferentiated into tumorigenic CD133(+)CD15(+)NESTIN(+)GSCs, and this process was regulated by hypoxia inducible factor-1 alpha. Moreover, the serum also played an important role in this dedifferentiation. These findings challenge the traditional glioma cell heterogeneity model, cell division model and glioma malignancy development model. Our study also highlights the mechanism of GBM recurrence and the importance of anti-hypoxia therapy. In addition to GSCs, residual differentiated tumor cells also substantially contribute to treatment resistance and the rapid, high recurrence of GBM.
引用
收藏
页码:28074 / 28092
页数:19
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