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摘要: 目的: 探讨Testin(TES)基因对人鼻咽鳞状细胞癌株5-8F细胞增殖、迁移的影响。方法: 以RT-PCR法从人鼻咽鳞状细胞癌株5-8F细胞获得目的基因,构建真核表达载体pEGFP-N1-TES,采用PCR、基因测序等对其进行鉴定;然后将其转导入人高转移鼻咽鳞状细胞癌株5-8F中,通过RT-PCR法及Western-blot法对其进行鉴定。接着采用流式细胞术、划痕试验检测转染后5-8F细胞增殖及迁移能力的影响。结果: 转染外源性TES基因后,转染外源性TES基因的5-8F细胞呈现明显的凋亡,差异有统计学意义(P<0.05)。细胞划痕实验表明:在第12、24、48 h时,TES组细胞迁移速率明显比空载体组和未转染组要慢(P<0.01)。结论: 该研究成功建立了能稳定高表达TES的细胞模型。TES基因在体外可明显抑制鼻咽癌5-8F细胞的增殖和降低其迁移运动能力,可能是一种潜在的抑癌基因。Abstract: Objective: To explore the influence and regulatory mechanism of TES gene on proliferation and migration of nasopharyngeal squamous cancer(NSPC) 5-8F cell.Method: DNA fragment encoding TES was obtained by RT-PCR method from the human highly metastatic nasopharyngeal squamous carcinoma cell line 5-8F. we identified the recombinant plasmid pEGFP-N1-TES by RT-PCR and DAN sequencing. we stablely transfected the pEGFP-N1-TES into the human highly metastatic nasopharyngeal squamous carcinoma cell line 5-8F, and detected the expression of TES by the RT-PCR and Western-blot method. And detected the impact of 5-8F cells transfection by flow cytometry and scratch tests.Result: Flow cytometry analysis showed that the apoptotic in 5-8F/pEGFP- N1-TES was significantly higher than non-transected TES and 5-8F/pEGFP-N1, and the differences were statistically significant(P<0.05). Cell scratch experiments showed that the 5-8F/pEGFP-N1-TES group cell migration rate was obviously lower than non-transected TES and 5-8F/pEGFP-N1 group in the first 12 h, 24 h and 48 h.The difference was significant(P<0.01).Conclusion: The stable transfectant cell model was established successfully. TES in vitro could significantly increase apoptosis and reduce the athletic ability. And thus TES gene might be a novel candidate of tumor-suppressor.
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Key words:
- Testin gene /
- nasopharyngeal squamous cancer /
- gene transfection
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