Cell Metab:代谢差异决定乳腺癌的转移部位

2015-10-23 candy 译 MedSci原创

    虽然代谢重编程是致癌性转化和原发肿瘤细胞生长的标志,而对于通过代谢是如何影响转移的,却鲜少有人研究。在这个细胞代谢的问题上,Dupuy等人发现原发性乳腺癌细胞存在代谢异质性,不同的代谢程序决定了他们的转移部位。而且在目前的研究中,不只是Dupuy等人发现不同的代谢策略在不同程度上改变转移部位。他们在研究中发现,由丙酮酸脱氢酶激酶(PDK1)表达增加而引起的代谢

虽然代谢重编程是原发肿瘤细胞生长和恶性转移的标志,但对于代谢是如何影响转移的,却鲜少有研究涉及到。

在这个细胞代谢的问题上,Dupuy等人发现原发乳腺癌细胞存在代谢异质性,不同的代谢程序决定了他们的转移部位。而且在目前的研究中,不只是Dupuy等人发现不同的代谢策略在不同程度上改变转移部位。

他们在研究中发现,由丙酮酸脱氢酶激酶(PDK1)表达增加而引起的代谢差异,有助于乳腺癌细胞在靶器官内环境中更好的适应,同时这种代谢差异也可以引起癌细胞与正常细胞的串联。例如,在肝脏中,肝细胞可能将来源于肿瘤细胞的乳酸转换成可以帮助癌细胞转移的代谢物,这一现象在其他肿瘤中也同样被发现过(Nieman等人2011)。
    
然而过去始终未发现转移细胞是如何切换到糖酵解途径的。本研究发现在对获得性突变和环境因素的反应过程中的确存在代谢途径的改变,如PTEN-induced 激酶 1 (PINK1)的损失。另一个可能的机制是被改变的Wnt/β-catenin信号促进结肠癌癌细胞的糖酵解,同时也通过丙酮酸脱氢酶激酶(PDK1)的表达。另外,因Warburg效应由线粒体损伤引发并提高肿瘤细胞对氧化应激的抵抗力,所以原癌细胞亚群可能利用这种代谢策略变得更加有活力,并种植在可以提供更好生存条件的靶器官上。例如,呼吸酶柠檬酸合酶(CS)的损失将Warburg效应与恶性肿瘤联系到了一起,可以诱导形态特征意义上的上皮细胞向间充质细胞转化(EMT),加速癌细胞转移。
    
总之,Dupuy等人的发现的重要性在于其表明了原发癌细胞的异质性代谢程序决定其将会扩散到哪个器官及部位。对癌细胞不同代谢产物的认识可以为靶细胞治疗或者预防转移提供独特的机会。

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    2015-11-11 智智灵药
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    2016-01-03 一闲
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    2016-05-11 guojianrong
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    2015-11-12 静秋

    学习了代谢差异

    0

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    2015-10-24 fengzhigu

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