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不同缺氧状态对人肝癌HepG2细胞侵袭和转移能力的影响

[文章编号]1000-4718(2012)02-0281-06

[收稿日期]2011-10-15[修回日期]2011-12-07

*[基金项目]广东省科技计划项目(No.2010B060900092);广州市卫生局中医药科研项目资助(No.2010A34)△通讯作者Tel :020-32213996;E -mail yuguifang2004@163.com 不同缺氧状态对人肝癌HepG2细胞

侵袭和转移能力的影响

*余桂芳1△,严跃红1,王瑞鑫1,曾文铤2,朱科伦

2(1广州医学院第五附属医院内一科,广东广州510700;

2广州医学院第一附属医院肝病研究室,广东广州510120)[摘要]目的:探讨不同缺氧状态对人肝癌HepG2细胞黏附、侵袭和转移能力的影响及其可能机制。

方法:不同浓度的低氧处理对数生长期的人肝癌HepG2细胞,采用MTT 法、Transwell 膜侵袭系统、免疫细胞化学

方法、明胶酶谱分析和反转录PCR 检测变异型白细胞分化抗原CD44v6、基质金属蛋白酶2(MMP -2)、MMP -9、低

氧诱导因子(HIF -1α)和血管内皮生长因子(VEGF )的表达差异。结果:HepG2细胞经低氧处理后,细胞的基质黏附率、穿透基底膜与游走迁移的细胞数均增高,以3%氧浓度最为显著(P <0.05);3%和5%氧处理还可显著促进CD44v6的表达,增加MMP -2和MMP -9的表达,并可上调HIF -1α和VEGF 。结论:适度缺氧能增强人肝癌细

胞的黏附、侵袭和转移能力,其机制可能与CD44v6、基质金属蛋白酶、

HIF -1α和VEGF 的表达改变有关。[关键词]肝肿瘤;HepG2细胞;缺氧;黏附;肿瘤侵袭

[中图分类号]R73-37[文献标志码]A doi :10.3969/j.issn.1000-4718.2012.02.017Effects of hypoxia in different degrees on in vitro invasion and migration of human hepatocarcinoma HepG2cells

YU Gui -fang 1,YAN Yue -hong 1,WANG Rui -xin 1,ZENG Wen -ting 2,ZHU Ke -lun 2

(1The First Department of Internal Medicine ,The Fifth Affiliated Hospital of Guangzhou Medical College ,Guangzhou 510700,China ;2Institute of Hepatology ,The First Affiliated Hospital of Guangzhou Medical College ,Guangzhou 510120,China.E -mail :yuguifang 2004@163.com )

[ABSTRACT ]AIM :To study the effects and the underlying mechanisms of hypoxia on adhesion ,invasion and migration of HepG2human liver cancer cells cultured in vitro .METHODS :HepG2cells were cultured under different concentrations of oxygen for 24h.MTT assay was used to measure the cell adhesion rate.The Transwell chambers were used to assess in vitro invasion and migration.The expression of CD44v6,matrix metalloproteinase 2(MMP -2),MMP -9,hypoxia -inducible factor -1α(HIF -1α)and vascular endothelial growth factor (VEGF )was detected by the methods of immunocytochemistry ,gelatin zymography and RT -PCR.RESULTS :Hypoxia ,especially under 3%oxygen ,signifi-cantly enhanced the adhesion rates of HepG2cells ,and increased the number of the cells migrated through Matrigel -coa-ted chambers (P <0.05).HepG2cells treated with 3%and 5%oxygen increased the expression of CD44v6,MMP -9,MMP -2,HIF -1αand VEGF.CONCLUSION :Pretreatment with moderate hypoxia enhances in vitro adhesion ,inva-sion and migration of HepG2cells.Multiple molecules including CD44v6,MMP -2,MMP -9,HIF -1αand VEGF may be involved in the processes.

[KEY WORDS ]Liver neoplasms ;HepG2cells ;Hypoxia ;Adhesion ;Neoplasm invasiveness

原发性肝癌是最常见的恶性肿瘤之一,大部分

肝癌患者就诊时已失去手术机会,经肝动脉化疗栓

塞成了主要的治疗措施。然而化疗栓塞后高复发转

移影响了患者的预后。多项研究结果表明[1-3],肝动脉化疗栓塞后残存肿瘤组织微血管密度增加,残

存癌细胞侵袭转移能力增强,从而促进肝癌化疗栓塞后的复发转移。因此,探讨缺氧对肝癌细胞侵袭转移能力的影响及其可能机制,为肝癌化疗栓塞程度以及栓塞后抗肿瘤侵袭转移治疗的选择,减少肿

瘤复发转移,改善肝癌患者生活质量,延长生命提供·182·中国病理生理杂志Chinese Journal of Pathophysiology 2012,28(2):281-286

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