Cell Metab:改变巨噬细胞代谢如何能够阻止癌细胞转移?

2016-10-22 佚名 生物谷

科学家们最近发现参与癌症扩散的一个关键因素,他们证明可以通过改变巨噬细胞代谢来阻止癌细胞扩散。该方法的关键之处在于让巨噬细胞与形成肿瘤血管的细胞争夺葡萄糖,导致肿瘤周围血管形成得更加严格有序,从而阻止癌细胞通过血液循环扩散到其他器官。相关研究结果发表在国际学术期刊Cell Metabolism上。巨噬细胞是免疫系统的一个重要组成部分,既可以在清除病原体的过程中发挥正面作用,又会在癌症生物学中扮演负


科学家们最近发现参与癌症扩散的一个关键因素,他们证明可以通过改变巨噬细胞代谢来阻止癌细胞扩散。该方法的关键之处在于让巨噬细胞与形成肿瘤血管的细胞争夺葡萄糖,导致肿瘤周围血管形成得更加严格有序,从而阻止癌细胞通过血液循环扩散到其他器官。相关研究结果发表在国际学术期刊Cell Metabolism上。

巨噬细胞是免疫系统的一个重要组成部分,既可以在清除病原体的过程中发挥正面作用,又会在癌症生物学中扮演负面角色,有研究证明肿瘤中包含一些特殊的巨噬细胞能够帮助肿瘤血管形成。因此癌细胞通过血管进入血液侵入到其他器官的风险变得更大。

虽然巨噬细胞的特性已经得到了广泛的研究,但是改变巨噬细胞代谢是否会影响它们的功能还不清楚。在这项研究中研究人员在巨噬细胞中抑制了一个叫做REDD1的基因,刺激了巨噬细胞的糖酵解。

肿瘤获得葡萄糖供应会引起血管形成细胞的过度激活,导致肿瘤内部形成混乱无序的血管网络。通过改变巨噬细胞代谢,研究人员在巨噬细胞和肿瘤血管之间建立了“葡萄糖争夺”关系,这样形成肿瘤血管的细胞不再受到过度刺激,血管形成过程也会变得更加温和,进而就在肿瘤周围形成了一个有条理且牢固的血管屏障,防止癌细胞逃离到血液中转移到远端器官。

除此之外,研究人员还研究了mTOR抑制剂药物的效果,这类药物本应该抑制肿瘤的生长。Massimiliano Mazzone教授表示:“这些mTOR抑制剂仅对部分病人有效,在小鼠模型上我们还发现这些药物有时会促进癌细胞转移,原因可能在于这些药物抑制了巨噬细胞的糖酵解。目前我们正在进行更进一步研究看看能否利用上述研究结果预测病人是否抵抗mTOR抑制剂。”

原始出处

Mathias Wenes, Min Shang, Mario Di Matteo, Jermaine Goveia, Rosa Martín-Pérez, Jens Serneels, Hans Prenen, Bart Ghesquière, Peter Carmeliet, Massimiliano Mazzone.Macrophage Metabolism Controls Tumor Blood Vessel Morphogenesis and Metastasis.Cell Metab.2016


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    2016-12-28 维他命
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    2017-03-20 guojianrong
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    2017-03-22 一闲
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    2016-10-24 yxch36
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    2016-10-24 zz72
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