NAT COMMUN:针对铜代谢杀死KRAS突变肿瘤

2020-07-29 MedSci原创 MedSci原创

尽管致癌性KRAS在人类癌症(包括结直肠癌(CRC))中具有重要意义,但针对它的治疗一直极具挑战性。

尽管致癌性KRAS在人类癌症(包括结直肠癌(CRC))中具有重要意义,但针对它的治疗一直极具挑战性。

为了确定KRAS突变CRC的潜在脆弱性,研究人员表征了致癌性KRAS对肠上皮细胞的细胞表面的影响。

研究人员表明,致癌性KRAS改变了很多与不同生物学功能相关的细胞表面蛋白的表达,并确定了许多潜在的表面可及的治疗目标。基于细胞表面的功能缺失筛查揭示了ATP7A,一个被突变KRAS上调的铜外排蛋白,其对肿瘤生长至关重要。

ATP7A在KRAS突变的CRC表面上调,并保护细胞免受过量铜离子毒性的影响。研究人员发现,KRAS突变的细胞通过一种非规范的机制获得铜,其中涉及大核细胞分裂,这似乎是支持其生长所必需的。

这些结果共同表明,铜的生物利用率是KRAS选择性的弱点,可以利用它来治疗KRAS突变的肿瘤。

 

原始出处:

Léo Aubert et al. Copper bioavailability is a KRAS-specific vulnerability in colorectal cancer, Nature Communications (2020). 

 

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    2021-03-01 医者仁心
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    2020-08-28 liuli5079
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    2020-07-31 ms3000000449926787

    学习😊

    0

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    2020-07-31 yinhl1978
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    2020-07-31 bioon7

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