基础医学与临床 ›› 2015, Vol. 35 ›› Issue (7): 938-942.

• 研究论文 • 上一篇    下一篇

LNAzyme特异性阻断丙肝病毒5′-NCR/C基因表达

邓益斌,农乐根,梁祚仁,覃羽华   

  1. 右江民族医学院临床学院
  • 收稿日期:2014-11-04 修回日期:2015-03-24 出版日期:2015-07-05 发布日期:2015-06-23
  • 通讯作者: 邓益斌 E-mail:dyb0776@163.com
  • 基金资助:
    广西自然科学基金

LNAzyme specific targeting against to both 5ˊ-NCR and C gene expression of hepatitis C virus

  • Received:2014-11-04 Revised:2015-03-24 Online:2015-07-05 Published:2015-06-23
  • Contact: bin yiDENG E-mail:dyb0776@163.com

摘要: 目的 探讨针对HCV 5ˊ-NCR/C双靶基因位点的锁核酸核酶对病毒基因复制与表达的特异性抑制作用。方法 实验分对照组和实验组。对照组分别为空白对照组和脂质体对照组。实验组分别为单靶区NCR组、单靶区C组和双靶区NCR/C组。半乳糖配体介导转染hepG2.9706细胞,用荧光定量PCR检测细胞培养液中HCV mRNA表达;化学发光技术检测细胞培养液中荧光素酶基因表达; 荧光显微镜系统检测细胞内荧光蛋白表达; 四甲基偶氮唑蓝法检测细胞代谢。应用SPSS 19.0统计学软件分析。各组间比较采用重复测量方差分析的SNK检验和Kruskal Wallis H检验。结果 加入锁核酸核酶后,对HCV RNA的复制均显示有较强的抑制作用(F=77.50,P<0.05),单靶区NCR组、单靶区C组和双靶区NCR/C组的平均抑制率分别为62.12%、61.39%和75.37%; 对荧光素酶的表达有抑制作用(F=48.65,P<0.05),平均抑制率分别为66.49%、65.06%和73.30%。给药后24、48和96 h, HCV mRNA的平均抑制率分别为52.36%、66.81%和75.05%; 荧光素酶的平均抑制率分别为53.02%、62.98%和79.45%; 细胞内的荧光蛋白表达阳性细胞数均较对照组明显减少(P<0.05)。结论 针对 5ˊ-NCR/C基因位点的LNAzyme能特异性抑制丙型肝炎病毒的复制与表达, 且双基因靶位优于单基因靶位。

关键词: 锁核酸核酶, 丙型肝炎病毒, 非编码区, 基因治疗

Abstract: Objective To investigate the inhibitory effects HCV replication of LNAzyme targeting to both 5ˊ-NCR andC genes in hepG2.9706 cells. Methods The experimental groups were divided into five groups:blank control group were treated with DMEM (dulbecco’s modified eagle medium) solution, galactose ligand control group were treated with galactose ligand alone, NCR group were treated with LNAzyme targeting to NCR gene, C group were treated with LNAzyme targeting to C gene, and dual-target group were treated with LNAzyme targeting to both NCR and C genes. LNAzyme was transfected into HepG2.9706 cells by galactose ligand. The levels of HCV RNA was quantified by Fluorescence Quantitative PCR. The expression of luciferase gene was detected by chemiluminescence technique. LNAzyme’s cyto-toxicity on cell was evaluated by MTT method. Results After LNAzyme transfection, the levels of HCV RNA in the NCR group, C group and dual-target group were reduced by 62.12%, 61.39% and 75.37%,respectively, and the luciferase gene expression were also decreased by 66.49%、65.06% and 73.30%, respectively. These values were significantly higher than those in the control groups (all P<0.05). The expression levels of fluorescent protein in the cells of all experimental groups were significantly lower than those in the control groups. Conclusion LNAzymetargeting to both 5ˊ-NCR and C gene can significant inhibit effect HCV replication and expression in vitrol, and dual-target was stronger than single target.

Key words: LNAzyme, Hepatitis C virus, Noncoding region, Gene therapy