Coordinate activation of Shh and PI3K signaling in PTEN-deficient glioblastoma: new therapeutic opportunities.

Coordinate activation of Shh and PI3K signaling in PTEN-deficient glioblastoma: new therapeutic opportunities.
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DOI:
10.1038/nm.3328
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发表时间:
2013-11
期刊:
影响因子:
82.9
通讯作者:
--
中科院分区:
医学1区
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在胶质母细胞瘤中,PI3K (PI3K)信号经常因肿瘤抑制因子PTEN的缺失而激活。然而,目前尚不清楚抑制PI3K是否代表一种选择性和有效的治疗方法。在这里,我们查询了大型数据库,发现Shh信号在pten缺陷胶质母细胞瘤中被激活。我们证明Shh和PI3K通路协同促进人类pten缺陷胶质母细胞瘤的肿瘤生长和活力。PI3K和Shh信号抑制剂的组合不仅抑制了这两种途径的激活,而且还消除了s6激酶信号。因此,同时靶向这两种途径可导致有丝分裂突变和肿瘤凋亡,并在体外和体内显著降低pten缺陷胶质母细胞瘤的生长。这里测试的药物对人体似乎是安全的;因此,这种组合可能为胶质母细胞瘤提供新的靶向治疗方法。
In glioblastoma, PI3kinase (PI3K) signaling is frequently activated by loss of the tumor suppressor PTEN. However, it is not known whether inhibiting PI3K represents a selective and effective approach for treatment. Here we interrogate large databases and find that Shh signaling is activated in PTEN-deficient glioblastoma. We demonstrate that Shh and PI3K pathways synergize to promote tumor growth and viability in human PTEN-deficient glioblastomas. A combination of PI3K and Shh signaling inhibitors not only suppresses activation of both pathways, but also abrogates S6kinase signaling. Accordingly, simultaneously targeting both pathways results in mitotic catastrophe and tumor apoptosis, and dramatically reduces growth of PTEN-deficient glioblastomas in vitro and in vivo. The drugs tested here appear safe in humans; therefore this combination may provide new targeted treatment for glioblastoma.
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