CANCER RES:胶质母细胞瘤中的miRNA抑制因子

2017-03-09 王哲 MedSci原创

北海道大学的研究团队发现了miRNA340在胶质母细胞瘤起始细胞中的抑制作用,该论文发表在期刊cancer research上。

北海道大学的研究团队发现了miRNA340在胶质母细胞瘤起始细胞中的抑制作用,该论文发表在期刊cancer research上。

神经胶质瘤起始细胞(GIC)具有是一种具有干细胞样特性的细胞,被认为在胶质母细胞瘤的复发,进展和耐药性中起重要作用。

在我们此前的研究中发现,miRNA(miR)-340在GIC中异常表达,并且抑制GIC介导的肿瘤发生。此外,我们发现:组织纤溶酶原激活剂(PLAT)是miR340抑制作用的其中一个重要的直接靶点。通过miRNAs筛选,我们发现与人类神经干细胞和正常脑组织相比,miR340在所有人类GIC和人成胶质细胞瘤组织中的表达都有所降低.在体外实验中我们发现:miR340在GIC中的过表达抑制其增殖,侵袭性和转移性并且能够致使细胞衰老。在大鼠实验中发现miR340过表达抑制GIC介导的肿瘤发生。 在离体实验和体内实验中使用shRNA介导的方法沉默PLAT基因能够显示出与miR340过表达相同的表型,结果提示组织因子在干细胞样功能中的的潜在作用。综上所述,我们的结果鉴定miR340在神经胶质瘤起始细胞中扮演肿瘤抑制因子的角色,并且通过抑制PLAT从而抑制GIC的干细胞样功能。

原始出处:
Yamashita D, Kondo T, Ohue S, et al. miR340 suppresses the stem-like cell function of glioma-initiating cells by targeting tissue plasminogen activator. Cancer research, March 2015 DOI: 10.1158/0008-5472.CAN-14-0938

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    2017-06-10 smallant2002
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    2017-03-11 Homburg
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