CD133(+) brain tumor-initiating cells are dependent on STAT3 signaling to drive medulloblastoma recurrence.

CD133(+) brain tumor-initiating cells are dependent on STAT3 signaling to drive medulloblastoma recurrence.
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DOI:
10.1038/onc.2016.235
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发表时间:
2017-02-02
期刊:
影响因子:
8
通讯作者:
Singh SK
Singh SK
中科院分区:
医学1区
文献类型:
--
作者:
Garg N;Bakhshinyan D;Venugopal C;Mahendram S;Rosa DA;Vijayakumar T;Manoranjan B;Hallett R;McFarlane N;Delaney KH;Kwiecien JM;Arpin CC;Lai PS;Gómez-Biagi RF;Ali AM;de Araujo ED;Ajani OA;Hassell JA;Gunning PT;Singh SK

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髓母细胞瘤(MB),最常见的恶性儿科脑肿瘤,目前治疗使用手术,颅脊髓放射治疗和化疗的组合。由于MB干细胞(MBSC),MB患者的一个子集仍然无法治疗,尽管标准治疗。CD 133用于鉴定MBSC,尽管其在肿瘤发生中的功能作用尚未确定。在这项工作中,我们发现第3组MB中CD 133的富集与转移率增加和临床结局差相关。信号转导和转录激活因子-3(STAT 3)通路在CD 133 + MBSC中选择性激活,并通过调节c-MYC(3组MB的关键遗传驱动因子)促进肿瘤发生。我们筛选了STAT 3抑制剂的化合物文库,并且用所选择的STAT 3抑制剂治疗导致体内肿瘤尺寸减小。我们认为抑制MBSC中的STAT 3信号可能是治疗复发性MB患者的潜在治疗策略。
Medulloblastoma (MB), the most common malignant paediatric brain tumor, is currently treated using a combination of surgery, craniospinal radiotherapy and chemotherapy. Owing to MB stem cells (MBSCs), a subset of MB patients remains untreatable despite standard therapy. CD133 is used to identify MBSCs although its functional role in tumorigenesis has yet to be determined. In this work, we showed enrichment of CD133 in Group 3 MB is associated with increased rate of metastasis and poor clinical outcome. The signal transducers and activators of transcription-3 (STAT3) pathway are selectively activated in CD133+ MBSCs and promote tumorigenesis through regulation of c-MYC, a key genetic driver of Group 3 MB. We screened compound libraries for STAT3 inhibitors and treatment with the selected STAT3 inhibitors resulted in tumor size reduction in vivo. We propose that inhibition of STAT3 signaling in MBSCs may represent a potential therapeutic strategy to treat patients with recurrent MB.
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