华西口腔医学杂志

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端粒酶催化亚单位转染血管内皮细胞的实验研究

代晓明1,李龙江1,温玉明1,王昌美1,刘华1,刘坤1,李胜富2   

  1. 1.口腔生物医学I程教育部重点实验室,四川大学; 2.四川大学华西医院移植免疫室,四川成都610041
  • 收稿日期:2004-10-25 修回日期:2004-10-25 出版日期:2004-10-20 发布日期:2004-10-20
  • 通讯作者: 温玉明,Telo028-85501440
  • 作者简介:代晓明(1973-),男,云南人,博士,现在昆明医学院工作

Studies on the transfection of Umbilical Endothelia with Catalytic Subunit of Telemerase

DAI Xiao-nung1,LI Long- Jiang,WEN Yu-ming'.WANG Chang-mei1,LIU Hun1,LIU Kun1,LI Sheng fu2   

  1. 1.Key. Laboratory of Oral Biomedical En- gineering Ministry of Education, Sichuan University, Chengdu 610041, China;2. Dept.of Transplantation and Immunology of West China Hospital,Sichuan Univers勿,Chengdu 610041,China
  • Received:2004-10-25 Revised:2004-10-25 Online:2004-10-20 Published:2004-10-20

摘要:

目的探讨端粒酶催化亚单位转染血管内皮细胞后,血管内皮细胞增生活性的变化。方法应用胶原酶消化法培养脐静脉血管内皮细胞(UE),ABC法检测内皮细胞CD34表达。脂质体介导内皮细胞转染,MTT法测定细胞代谢活性并测定细胞生长曲线。基于逆转录聚合酶链反应的端粒重复末端扩增分析法检测端粒酶活性表达。结果培养的细胞贴壁后为单层呈铺路石状排列。细胞爬片CD34染色呈阳性,pBABE-HYGRO-hERT转染内皮细胞测定端粒酶活性的吸光度为0.889. NIT],实验表明:在各个时间点转染阳性细胞(HC)的吸光值都高于脐静脉血管内皮细胞(UE)(P<0.05). UE与HC的细胞生长曲线形态相似,8d内HC数量增长了约4倍。在各个时间点HC 较UE细胞数多(P < 0.05)。结论pBABE-HYGRO-hTERT转染内皮细胞后,提高了内皮细胞端粒酶的活性和增殖能力。

关键词: 血管内皮细胞, 端粒酶催化亚单位, 转染

Abstract:

Objective To investigate the variety of proliferating ability of umbilical endothelia《UE) transfected场plasmid pBABE-HYGR-hTERT. Methods UE~identified from two aspects: morphology and CD34 labeling technique. The plasmid ~obtained and identified场alkali splitting and gel electrophoresis. Uposomes~used to transfect UE. RT-PCR based telo- meric repeat amplification protocol(TRAP) assay~used to measure the telomerase activity of endothelia. Results LlE arranged as "cobblestone" and were positive of CD34 labeling. Endothelia transfected场pBABE-HYGR-hTERT(HC ) had an raised absor- bance of 0.889. The shape of growth。~of HC was similar to UE. But the absorbance of MTT test and the amount of HC were prior to UE at every measuring time and the amount of HC increased four times within 8 days ( P<0.05).Conclusion The transfection of pBABE-HYGRO-hTERT had greatly improved the prliferating abilities and activated the telemerase of UE.

Key words: vascular endothelium, catalytic subunit of telemerase