The EphA2 receptor drives self-renewal and tumorigenicity in stem-like tumor-propagating cells from human glioblastomas.

The EphA2 receptor drives self-renewal and tumorigenicity in stem-like tumor-propagating cells from human glioblastomas.
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DOI:
10.1016/j.ccr.2012.11.005
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发表时间:
2012-12-11
期刊:
影响因子:
50.3
通讯作者:
Vescovi AL
Vescovi AL
中科院分区:
医学1区
文献类型:
--
作者:
Binda E;Visioli A;Giani F;Lamorte G;Copetti M;Pitter KL;Huse JT;Cajola L;Zanetti N;DiMeco F;De Filippis L;Mangiola A;Maira G;Anile C;De Bonis P;Reynolds BA;Pasquale EB;Vescovi AL

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在人类胶质母细胞瘤(hGBM)中,具有干细胞样特征(TPC)的肿瘤增殖细胞代表了关键的治疗靶点。我们发现EphA 2受体酪氨酸激酶在hGBM TPC中过表达。细胞荧光分选成EphA 2高和EphA 2低群体证明EphA 2表达与hGBM中TPC库的大小和肿瘤增殖能力相关。两者,ephrinA 1-Fc,导致EphA 2下调的TPC,和siRNA介导的敲低EPHA 2表达抑制TPC的自我更新离体和颅内致瘤性,指出EphA 2下调作为一个因果事件的损失TPC致瘤性。将ephrinA 1-Fc输注到颅内异种移植物中引起强烈的肿瘤抑制作用,提示治疗应用。
In human glioblastomas (hGBMs), tumor-propagating cells with stem-like characteristics (TPCs) represent a key therapeutic target. We found that the EphA2 receptor tyrosine kinase is overexpressed in hGBM TPCs. Cytofluorimetric sorting into EphA2High and EphA2Low populations demonstrated that EphA2 expression correlates with the size and tumor-propagating ability of the TPC pool in hGBMs. Both, ephrinA1-Fc, which caused EphA2 downregulation in TPCs, and siRNA-mediated knockdown of EPHA2 expression suppressed TPCs self-renewal ex vivo and intracranial tumorigenicity, pointing to EphA2 downregulation as a causal event in the loss of TPCs tumorigenicity. Infusion of ephrinA1-Fc into intracranial xenografts elicited strong tumor-suppressing effects, suggestive of therapeutic applications.
胶质瘤干细胞增殖和肿瘤生长由一氧化氮合酶2促进。
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