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Cancer Res:Cic突变通过神经干细胞异常增殖和分化促进神经胶质瘤发生

2017-11-25 Emma MedSci原创

神经胶质瘤简称胶质瘤,是发生于神经外胚层的肿瘤。神经外胚层发生的肿瘤有两类,一类由间质细胞形成,称为胶质瘤;另一类由实质细胞形成,称神经元肿瘤。

神经胶质瘤简称胶质瘤,是发生于神经外胚层的肿瘤。神经外胚层发生的肿瘤有两类,一类由间质细胞形成,称为胶质瘤;另一类由实质细胞形成,称神经元肿瘤。大多数肿瘤起源于不同类型的神经胶质,但根据组织发生学来源及生物学特征类似,对发生于神经外胚层的各种肿瘤,一般都称为神经胶质瘤。胶质瘤的分类方法很多,临床工作者往往采用的是分类比较简单的Kernohan分类法。各型胶质瘤中,以星形细胞瘤最多,其次为胶质母细胞瘤,其后依次为髓母细胞瘤、室管膜瘤、少枝胶质瘤、松果体瘤、混合性胶质瘤、脉络丛乳头状瘤、未分类胶质瘤及神经元性肿瘤。人类大约有50%患有少突胶质细胞瘤的患者是由于转录抑制因子Capicua(CIC)失活突变造成的。研究提示,CIC参与基因抑制且能够被EGFR信号缓解。

发表于cancer research的一篇文章中,研究人员调查了CIC是否与发病机制有关。研究发现,CIC可以通过非依赖性EGFR途径广泛激活基因表达。CIC损失增强肿瘤的形成并减少了肿瘤发展的潜伏期。该研究确定了CIC在调节神经细胞增殖和谱系规范中的重要作用,并表明CIC突变影响少突神经胶质瘤的发病机制和相关靶向治疗的策略。

研究人员利用CIC缺陷的小鼠模型和人类少突神经胶质细胞模型进行试验并对条件性敲除CIC小鼠模型的神经干细胞进行离体培养。部分小鼠模型出现遗传缺陷导致渗透胚胎或围产期致死,存活的小鼠中产生了异常增殖的神经群体。

原始出处:
Yang R ,et al. Cic Loss Promotes Gliomagenesis via Aberrant Neural Stem Cell Proliferation and Differentiation. Cancer Res. 2017 Nov 15;77(22):6097-6108. doi: 10.1158/0008-5472.CAN-17-1018. Epub 2017 Sep 22.

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    2017-11-26 狼毒花1982

    学习了感谢分享

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    2017-11-26 狼毒花1982

    学习了感谢

    0

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    2017-11-25 惠映实验室

    学习了.谢谢.

    0

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    2017-11-25 狼毒花1982

    学习了感谢分享

    0

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