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ASCO 2014:MACC1基因对人胃癌淋巴管生成的影响

2014-05-31 刘揆亮 译 医学论坛网

结肠癌转移相关基因-1对人胃癌淋巴管生成的影响 摘要号:#4042 第一作者:Sun Li,南方医科大学南方医院 背景:结肠癌转移相关基因-1(MACC1)是一种新型癌基因,主要表达于包括胃癌(GC)在内的几种实体瘤,与肿瘤淋巴结转移有关。GC的淋巴结转移对患者的临床转归有关键决定作用。因此,我们的研究评价了MACC1是否影响GC淋巴管转移,并探讨了其可能机制

结肠癌转移相关基因-1对人胃癌淋巴管生成的影响

摘要号:#4042

第一作者:Sun Li,南方医科大学南方医院

背景:结肠癌转移相关基因-1(MACC1)是一种新型癌基因,主要表达于包括胃癌(GC)在内的几种实体瘤,与肿瘤淋巴结转移有关。GC的淋巴结转移对患者的临床转归有关键决定作用。因此,我们的研究评价了MACC1是否影响GC淋巴管转移,并探讨了其可能机制。

方法:在190例GC组织中进行了MACC1和LVYE-1的免疫组化分析以发现MACC1与淋巴结转移以及淋巴管生成之间的关系。采用MTT、Transwell迁移和3D培养检测评价了MACC1上清液与人淋巴管内皮细胞(HLEC)共培养后对其增殖、迁移和毛细血管样结构形成能力的影响。另外,我们采用qRT-PCR、免疫印迹和ELISA 检测了GC细胞内血管内皮生长因子-C (VEGF-C)/VEGF-D的表达。

结果:MACC1的表达与淋巴结转移(p<0.01)和淋巴管生成(p<0.001)相关,同时,MACC1表达缺失与GC患者预后较好相关(p<0.001)。此外,体外研究证实 MACC1通过促进细胞增殖和迁移上调HLEC的管状结构形成能力。在裸鼠种植试验中,MACC1 还可促进淋巴管生成和淋巴侵袭。另外,MACC1在GC细胞和移植瘤中从蛋白和基因水平均显著上调VEGF-C/VEGF-D,肝细胞生长因子(HGF)/c-Met信号轴抑制剂可抑制这种作用。

结论:这些数据证实MACC1上调VEGF-C/VEGF-D表达,部分通过HGF/c-Met途径促进淋巴管生成,提示MACC1在胃癌淋巴结转移中具有关键作用。

研究链接:Effect of metastasis associated in colon cancer-1 on lymphangiogenesis in human gastric cancer. (Abstract 4042)

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    2015-04-06 quxin068
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    2015-01-16 yb6560
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    2014-06-02 amyloid

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