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-514 bp 及-250bp位点基因多态性对肝脂酶转录活性的影响

蔡泽园1,赵莉莉2,毛用敏2,崔让庄2   

  1. 1. 天津市胸科医院心血管病研究所
    2. 天津市胸科医院
  • 收稿日期:2011-08-03 修回日期:2011-12-02 出版日期:2012-08-15 发布日期:2012-08-15
  • 通讯作者: 蔡泽园

The effect of Hepatic Lipase Gene Promoter Polymorphisms on its transcriptional activity

  • Received:2011-08-03 Revised:2011-12-02 Published:2012-08-15 Online:2012-08-15
  • Contact: CAI ze Yuan

摘要: 摘要 目的:构建同时含肝脂酶(HL)启动子-514和-250多态位点的野生型及变异纯合子型的荧光素酶表达质粒,将其转染至HepG2细胞中表达,比较该基因变异对HL转录活性的影响。方法:PCR法扩增含不同目的基因的DNA片段,将目的基因插入到pUCm-T质粒中,获取含 SacI及BagII酶切位点的目的基因,再将该基因与含荧光素报告基因的pGL2质粒相连,构建pGL2-HL/ -514T+-250A变异纯合型以及 pGL2-HL/-514C+-250G野生型荧光素酶表达质粒,转染至HepG2细胞内表达,双荧光素酶检测系统检测不同重组质粒荧光素酶报告基因的活性。结果:(1)成功构建了同时含HL启动子部位-514/ -250位点的野生型和变异纯合型的荧光素酶表达质粒。(2)pGL2-HL/ -514T+-250A变异纯合型的荧光素酶相对表达活性明显低于野生型荧光素酶表达活性。结论:HL启动子-514及-250位置基因的联合变异可直接影响HL的转录活性。

关键词: 肝脂酶, 启动子, 多态现象, 转录活性, 荧光素酶

Abstract: Abstract Objective: To construct the recombinant plasmid containing the double luciferase report gene and the HL promoter -514/-250 sites.and tansfect the plasmids to HepG2 cells.Then to analyse HL transcriptional activity. Method: Construct luciferase reporter vector containing HL promoter -514T/-250A and -514C/-250G polymorphisms, tested by Dual Luciferase Reporter Assay System, use Fluoroskan Ascent FL test the 10 second value. Result: The luciferase reporter vector contain with HL promoter -514T+-250A present higher HL transcriptional activity than the vector with -514C+-250G. Conclusion: HL promoter -514C together with -250G alleles are associated with higher HL tanscriptional activity, so proved that HL promoter polymorphisms can influence the HL transcriptional activity on the molecular mechanism.

Key words: Hepatic lipase, Promoter, Polymorphism, Transcriptional activity, Luciferase