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在小鼠中,囊缺乏会诱导胰腺瘤铁

Michael A Badgley^1,2, Daniel M Kremer^3,4, H Carlo Maurer^1,2,5

¹Division of Digestive and Liver Diseases, Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA.

Science (New York, N.Y.)

|April 4, 2020

概括

胰腺癌细胞依靠囊进口来防止细胞死亡途径铁亡. 通过向系统x_C-来抑制这种进口,引发瘤细胞死亡并阻止胰腺管腺癌的生长.

科学领域:

癌症学
细胞生物学
生物化学

背景情况:

铁亡是一种受调节的细胞死亡,其特征是脂质反应性氧物种 (ROS) 的积累.
瘤信号促进ROS的产生,通常由氨酸衍生代谢物抑制.
胰腺管腺癌 (PDAC) 是一种高度致命的癌症,治疗选择有限.

研究的目的:

在PDAC中通过系统x_C^-调查囊进口的作用.
确定向系统x_C-^{是否可以诱导铁和抑制PDAC生长.}

主要方法:

使用PDAC的基因工程小鼠模型.
评估了删除系统x_{C^-子单元*Slc7a11*对瘤生长和铁亡的影响.}
在PDAC模型中使用囊酶,一种消耗囊素的酶.

主要成果:

通过系统x_C-^{,PDAC细胞对囊进口具有关键的依赖性.}
囊对于合成氨酸和辅酶A至关重要,它们抑制PDAC中的铁.
删除*Slc7a11*或使用囊酶诱导瘤选择性铁和抑制PDAC进展.
这些发现表明PDAC的潜在治疗策略.

结论:

系统x_C^-介导的囊进口是PDAC的一个关键漏洞.
针对这种途径提供了一种有前途的治疗方法来诱导铁亡并对抗胰腺癌.

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