T淋巴瘤侵袭转移诱导因子1与胃癌细胞侵袭移行能力的关系.doc
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1、T淋巴瘤侵袭转移诱导因子1与胃癌细胞侵袭移行能力的关系文章来源 毕业论文网 毕业论文 作者:朱金明 余佩武 李翠芳 吴淼【摘要】 目的 检测胃癌细胞中T淋巴瘤侵袭转移诱导因子1(T lymphoma invasion and metastasis inducing factor 1,Tiam1)的表达及其与肿瘤侵袭、移行能力的关系,同时观察胃癌细胞在形态学方面的变化。方法 采用层黏连蛋白黏附法,由胃癌MKN45细胞株(M0)中筛选获得高(MH)、低(ML)黏附亚
2、株。应用流式细胞仪检测Tiam1在胃癌细胞中的表达,以Boyden小室法测定M0、ML、MH细胞的体外侵袭、移行能力,并分析其与Tiam1表达间的关系,同时采用苏木精伊红及细胞骨架蛋白染色、扫描电镜技术观察胃癌细胞形态。结果 MH细胞的体外侵袭、移行能力及Tiam1表达均强于M0、ML细胞(P<0.05),且Tiam1表达与胃癌细胞体外侵袭、移行能力呈正相关(r=0.997和1.000);同时与M0、ML相比,MH胞体伸展,表面突起增多,片状伪足宽厚,丝状伪足细长而密集,异型性明显,且细胞骨架结构较紊乱,斑点状肌动蛋白小体增多。但M0、ML细胞间差异无统计学意义(P>0.05)。结
3、论 Tiam1表达水平升高可能促进胃癌细胞侵袭、移行。这或许是通过调整胃癌细胞骨架结构重组,增强其变形、游走能力而实现的。 【关键词】 胃癌; T淋巴瘤侵袭转移诱导因子1; 侵袭; 移行; 形态学Correlation between invasion and migration ability of gastric cancer cells and Tiam 1 【Abstract】 Objective To investigate the expression of T lymphoma invasion and me
4、tastasis inducing factor 1 (Tiam1) in gastric cancer cells and its relationship with the invasion and migration ability of gastric cancer cells, and observe the morphological changes of gastric cancer cells. Methods High adhesive subgroups (MH) and low adhesive subgroups (ML) were separated fr
5、om MKN45 cell strain (M0) by laminin adhesion method in vitro. The expressions of Tiam1 in M0, ML and MH cells were detected by flow cytometry, the invasion and migration ability of M0, ML and MH cells in vitro by Boyden chamber. The correlation between invasion and migration ability of M0, ML, MH c
6、ells and expression of Tiam1 in M0, ML, MH cells was analyzed. The morphological differences among M0, ML and MH cells were observed by hematoxylin eosin stain, cytoskeletal protein stain and scanning electronic microscope. Results The invasion and migration ability and the expression of Tiam1
7、 in MH cells were higher than those in M0 and ML cells (P<0.05). The expression of Tiam1 was positively correlated with the invasion and migration ability of gastric cancer cells (r=0.997, 1.000). Compared with the M0 and ML cells, the MH cell bodies elongated with wide and thick lamellate pseudo
8、podia, slender and intensive filamentous pseudopodia, more projections on the surface, derangement of cell skeleton and more dotlike actin bodies. There was no significant difference between M0 and ML cells (P>0.05). Conclusions The high expression level of Tiam1 may promote the invasion an
9、d migration of gastric cancer cells through adjusting the cytoskeletal reconstruction and enhancing the deforming and migration ability of gastric cancer cells. 【Key words】 Gastric cancer; T lymphoma invasion and metastasis inducing factor 1; Invasion; Migra
10、tion; Morphology 肿瘤细胞的侵袭转移与其运动能力密不可分,而有效迁移行为的达成又来源于细胞内、 外调节因子对细胞骨架动力装置所赋予的驱动力以及细胞骨架成分介导黏附所提供锚定力间的协调运作。T淋巴瘤侵袭转移诱导因子1(T lymphoma invasion and metastasis inducing factor 1,Tiam1)正是作为重要的细胞骨架结构调节因子, 而与肿瘤侵袭转移密切相关1-3。本实验通过检测Tiam1蛋白在具有不同侵袭、 移行能力胃癌细胞中的表达, 初步探讨了Tiam1表达与胃癌细胞侵袭、移行的关系,并对其
11、细胞形态学结构基础进行了简要分析。1 材料与方法11 主要试剂 层黏连蛋白、碘化丙啶、考马斯亮蓝R250为美国Sigma公司产品;Boyden小室为美国Millipore公司产品;Matrigel人工基质为美国B&D Biosciences公司产品;兔抗人/鼠Tiam1多克隆抗体为美国Santa Cruz公司产品;FITC标记山羊抗兔荧光2抗为北京中杉金桥公司产品。12 胃癌细胞高、低黏附亚株筛选 胃癌MKN45细胞株(M0)购自上海仁济医院上海市消化疾病研究所,置于含10%小牛
12、血清的RPMI 1640培养液中,在37 饱和湿度、5% CO2条件下培养,其高(MH)、低(ML)黏附亚株系经“层黏连蛋白黏附法”筛选分离获得4。实验所用均为末次筛选所得ML、MH传代5次以内的细胞。13 胃癌细胞中Tiam1蛋白检测 取对数生长期经胰蛋白酶消化的M0、ML、MH细胞, 以4%多聚甲醛固定并洗涤、 离心(2000 r/min)后重悬,4 封闭与离心(1500 r/min),加入1100稀释的兔抗人Tiam1抗体200 l。阴性对照组加入1100稀释的兔抗IgG,37 孵育并离心(1500 r/min)后,加入150稀释FITC标
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- 关 键 词:
- 淋巴瘤 侵袭 转移 诱导 因子 胃癌 细胞 移行 能力 关系
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