PNAS:TDP43可以作为三阴性乳腺癌治疗的潜在靶标

2018-04-03 佚名 昆明动物所

三阴性乳腺癌(TNBC)是一类恶性程度较高的乳腺癌分型。相对于其他类型的乳腺癌,三阴性乳腺癌表现出转移率高、细胞增殖快和预后差等特征。目前缺乏三阴型乳腺癌的成功靶向药物。

三阴性乳腺癌(TNBC)是一类恶性程度较高的乳腺癌分型。相对于其他类型的乳腺癌,三阴性乳腺癌表现出转移率高、细胞增殖快和预后差等特征。目前缺乏三阴型乳腺癌的成功靶向药物。

中国科学院昆明动物研究所焦保卫研究组利用生物信息学分析发现:相比于其他乳腺癌亚型,三阴性乳腺癌存在独特的选择性剪接谱。这种独特剪接模式的调控因子可能作为三阴性乳腺癌潜在的药物靶点。该课题组沿着这个研究思路发现,剪接因子TDP43在三阴性乳腺癌的选择剪接谱中发挥主导功能。TDP43在三阴性乳腺癌中高表达,且高表达对应预后差;在三阴性乳腺癌细胞系中敲降TDP43表达抑制了细胞增殖、促进细胞凋亡、抑制细胞转移侵袭能力。反之,TDP43高表达则促进肿瘤细胞的恶性生长。通过蛋白质谱、转录组分析与功能实验验证等,进一步发现TDP43与另一个剪接因子SRSF3形成剪接复合物,协同调控三阴性乳腺癌的选择性剪接事件。最后,通过功能回补实验,确定该复合物通过调控下游基因PAR3与NUMB的选择性剪接,进而影响三阴性乳腺癌增殖与转移能力。上述结果表明,TDP43可以作为三阴性乳腺癌治疗的潜在靶标,该项研究将从三阴性乳腺癌的独特剪接谱角度为治疗靶点提供新的研究方向。

以上研究成果于3月26日在线发表在《美国国家科学院院刊》(PNAS)上。该研究得到中科院战略性先导科技专项B类(动物复杂性状的进化解析与调控)、国家重点研发计划、国家自然科学基金和遗传资源与进化国家重点实验室开放课题的资助。

原始出处:

Hao Ke,et al.Loss of TDP43 inhibits progression of triple-negative breast cancer in coordination with SRSF3.Proc Natl Acad Sci U S A.March 26, 2018. 201714573.

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    2018-06-21 drwjr
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    2018-04-05 zhaojie88
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    2018-04-05 xlysu
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    2018-04-04 jihuaijun1112

    学习学习学习

    0

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    2018-04-03 131****1460

    学习了受益匪浅

    0

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    2018-04-03 九九消寒

    优质资源.共同学习

    0

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