摘要
背景与目的近年来的研究发现Aurora-A在多种恶性肿瘤中高表达。本研究检测Aurora-A激酶在人类不同肺癌细胞株中的表达及其与DNA含量的关系,旨在寻找肺癌新的分子治疗靶点和肿瘤标记物,为指导肺癌个性化治疗提供一种新的方法。方法应用RT-PCR与Westernblot方法检测PG(高转移的巨细胞肺癌)、A549(肺腺癌)、NCI-H460(大细胞肺癌)3种肺癌细胞株Aurora-A的表达;流式细胞仪检测3种肺癌细胞DNA含量(四倍体及多倍体),分析Aurora-A的表达与DNA含量的相关性。结果半定量RT-PCR电泳结果显示,A549、PG、NCI-H460中Aurora-A/β-actin比值分别为1.16、1.14、0.84;Westernblot结果在A549、PG与NCI-H460中的Aurora-A/β-actin比值分别为21.13、8.96与6.43,提示3种肺癌细胞Aurora-A均呈高表达。A549、PG、NCI-H460细胞含有四倍体的细胞比例分别为14.97%、19.88%和10.60%,三者有显著性差异(P<0.01);其多倍体(>4N)的细胞比例分别为3.59%、2.66%、2.30%。提示Aurora-A表达强弱与肺癌细胞多倍体的比例高低有相关性。结论3种肺癌细胞中Aurora-A基因均高表达,其表达水平在不同肺癌细胞株中存在差异。
BACKGROUND & OBJECTIVE: Recent researches found that Aurora-A overexpresses in various malignancies. This study was to detect the expression of Aurora-A in lung cancer cell lines PG (highly-metastatic giant cell lung cancer), A549 (lung adenocarcinoma), and NCI-H460 (large cell lung cancer) and explore its correlation to DNA content, provide a theoretical basis for screening tumor marker and molecular therapeutic target of lung cancer. METHODS: mRNA and protein levels of Aurora-A in PG, A549, and NCI-H460 cells were detected by reverse transcription-polymerase chain reaction(RT-PCR) and Western blot. Flow cytometry was used to analyze DNA contents in cell cycles of PG, A549, and NCI-H460 cells. RESULTS: mRNA level of Aurora-A was 1.14 in PG cells, 1.16 in A549 cells, and 0.84 in NCI-H460 cells, respectively; protein level of Aurora-A was 8.96 in PG cells, 21.13 in A549 cells, and 6.43 in NCI-H460 cells, respectively. The proportion of cells with tetraploid DNA was 19.88% in PG cells, 14.97% in A549 cells, and 10.6% in NCI-H460 cells, respectively (P<0.01); the proportion of cells with polyploid DNA was 2.66% in PG cells, 3.59% in A549 cells, and 2.30% in NCI-H460 cells, respectively. CONCLUSION: Aurora-A is overexpressed in the 3 lung cancer cell lines, but the mRNA levels are different.
出处
《癌症》
SCIE
CAS
CSCD
北大核心
2005年第7期792-795,共4页
Chinese Journal of Cancer
基金
辽宁省科学技术发展基金(No.20031067)~~
