Oncogene:癌细胞之无间道

2015-05-12 佚名 生物谷

肿大的淋巴结常常是癌症细胞转移扩散最早期的征象。最近,来自瑞典卡罗林斯卡研究所的癌症研究人员及免疫学家们发现了,癌症细胞是如何伪装成免疫细胞(白细胞),从而进入到淋巴系统中的。研究人员们希望这项发表于Oncogene杂志上的研究发现,可以为新药开发提供新的信息。人们死于癌症的主要原因是,癌症在一些重要器官,如肺脏及肝脏,扩散形成子肿瘤,或称为肿瘤转移。癌症细胞扩散的主要途径之一是利用淋巴系统。在进

肿大的淋巴结常常是癌症细胞转移扩散最早期的征象。最近,来自瑞典卡罗林斯卡研究所的癌症研究人员及免疫学家们发现了,癌症细胞是如何伪装成免疫细胞(白细胞),从而进入到淋巴系统中的。研究人员们希望这项发表于Oncogene杂志上的研究发现,可以为新药开发提供新的信息。

人们死于癌症的主要原因是,癌症在一些重要器官,如肺脏及肝脏,扩散形成子肿瘤,或称为肿瘤转移。癌症细胞扩散的主要途径之一是利用淋巴系统。在进入淋巴管后,它们可以迁移到附近的淋巴结,这可以引起淋巴结的肿大,接着癌症细胞可以从淋巴结通过血液到达其它器官。然而,癌症细胞是如何和为什么要利用淋巴系统进行扩散,目前相对而言还不清楚。

"是否有信号来控制这个过程,或者它是随机发生的,现在仍不清楚。" 卡罗林斯卡研究所医学生化及生物物理系癌症研究者,副教授Jonas Fuxe说。"但是,近些年来有证据表明,炎症是可以促进癌症转移的一个因素,用抗炎药对癌症扩散有一定的抑制效果。"

这项研究正是基于癌症研究人员及免疫学家们的交叉学科合作,从而做出了这项新的,激动人心的成果。他们发现,一个名为TGF-beta(转化生长因子-beta)的炎症因子,可以赋予癌症细胞免疫细胞的特性,通过向癌症细胞表面提供一种受体,这种受体通常仅仅存在于穿梭进入淋巴系统的白细胞上。

具备了这个受体,癌症细胞就可以确认且向一定的物质梯度迁移,这些物质是由淋巴管分泌,并且可以和此受体相结合。通过这种方式,癌症细胞就可以像淋巴细胞一样,有效地靶向淋巴管,并迁移至淋巴结。据研究人员们称,他们的研究结果用一种新的方式,将炎症和癌症连接了起来,为开发新的治疗模式提供了可能。

"有了这项研究发现,我们将进一步找出,癌症细胞除此之外所具备的免疫细胞特性,及它们是如何影响转移过程的," Fuxe说。"通过淋巴系统阻止或是减慢癌症细胞的扩散,从而降低肿瘤转移至其它器官的风险,这种可能性是十分吸引人的。"

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    2016-03-23 cy0324
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    2015-05-14 yxch36
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    2015-05-14 zsyan
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    2015-05-14 等你一年又一年

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    2015-05-13 huaxipanxing

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