eLife:癌症扩散,不可忽视的淋巴管内皮细胞

2018-05-02 小通 生物通

在模拟组织环境和异种移植细胞小鼠模型中,共培养人类原代淋巴管内皮细胞和人类黑色素瘤癌细胞会增加黑色素瘤细胞的侵袭生长并促进黑色素瘤远端器官转移。


在模拟组织环境和异种移植细胞小鼠模型中,共培养人类原代淋巴管内皮细胞和人类黑色素瘤癌细胞会增加黑色素瘤细胞的侵袭生长并促进黑色素瘤远端器官转移。

尽管在个体水平,许多癌症类型的死亡率都在下降,但是,另外一些癌症的死亡率却依然保持稳定,甚至还有所增加,黑色素瘤(melanoma)就是其中之一。

当癌细胞通过淋巴结扩散到身体其他部位时,经常受晚期黑色素瘤(IV期黑色素瘤)影响的器官是肝、肺、骨和脑。

通常,原发性黑色素瘤仅生长在上层皮肤,然后深入到真皮层,进而到达淋巴和血管。淋巴浸润和淋巴结转移与黑色素瘤的临床预后差有关。研究人员认为,作为癌细胞转移通道的淋巴管可能也参与转移调节过程,但其内在机制仍未解开。

“正因为淋巴管对黑色素瘤远端器官转移中的作用和功能一直未明,我们才有必要研究淋巴管壁和淋巴管内皮细胞对人类黑色素瘤的作用,”最新《eLife》文章通讯作者、芬兰赫尔辛基大学教授P?ivi Ojala说。“只有充分了解促进远端器官转移的肿瘤淋巴微环境,我们才能找到控制和治疗这种转移性癌症的潜在靶点或新线索。”

研究人员发现,在模拟组织环境和异种移植细胞小鼠模型中,共培养人类原代淋巴管内皮细胞和人类黑色素瘤癌细胞会增加黑色素瘤细胞的侵袭生长并促进黑色素瘤远端器官转移。

与淋巴管内皮细胞(LEC)联合培养的人类WM852黑素瘤细胞的3D纤维蛋白分析共聚焦图像。LEC接触诱导黑素瘤细胞侵袭性生长。黑素瘤细胞(绿色)被抗CD44抗体染成了红色

与淋巴内皮细胞联合培养的WM852黑素瘤细胞异种移植切片免疫免疫组化共聚焦图像。小鼠淋巴管(红色),人类淋巴瘤细胞 (绿色)

黑色素瘤淋巴管内皮细胞介导的肿瘤侵袭性变化依赖于MMP14、Notch3和b1-整合蛋白(b1-integrin proteins)。

利用斑马鱼肿瘤模型,研究人员发现MMP14和Notch3是人类黑色素瘤细胞转移增加的必需条件。

这项研究揭示了淋巴管内皮细胞直接参与黑色素瘤转移的独特机制。“这些发现可作为转移癌的新预后标志物,制药业也可以参考寻求进一步的治疗策略研发。”

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    2019-03-05 膀胱癌
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    2018-06-08 clmlylxy
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    2018-05-04 amyloid
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    2018-05-04 121ff658m46暂无昵称

    学习了.谢谢!

    0

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