吉林大学学报(理学版) ›› 2019, Vol. 57 ›› Issue (3): 696-700.

• 生物科学 • 上一篇    下一篇

Exendin4高活性短肽模拟物的筛选及生物活性#br#

宋相伟1, 王雪丽2, 王璐璐1, 楼婉琳1,  王丽萍3, 熊新辉3, 牛建丽3, 李惟3
  

  1. 1. 长春师范大学 生命科学学院, 长春 130032; 2. 吉林工商学院 粮食学院, 长春 130507;3. 吉林大学 生命科学学院, 长春 130012
  • 收稿日期:2018-05-14 出版日期:2019-05-26 发布日期:2019-05-20
  • 通讯作者: 王雪丽 E-mail:wangxueli@jlbtc.edu.cn

Screening and Bioactivity of HighActivityShortPeptide Mimics of Exendin4

SONG Xiangwei1, WANG Xueli2, WANG Lulu1,  LOU Wanlin1,WANG Liping3, XIONG Xinhui3, NIU Jianli3, LI Wei3#br#   

  1. 1. College of Life Science, Changchun Normal University, Changchun 130032, China;2. College of Grain, Jilin Business and Technology College, Changchun 130507, China;3. College of Life Science, Jilin University, Changchun 130012, China
  • Received:2018-05-14 Online:2019-05-26 Published:2019-05-20
  • Contact: WANG Xueli E-mail:wangxueli@jlbtc.edu.cn

摘要: 以细胞表面胰高血糖素样肽(GLP-1)受体为靶标, 利用噬菌体筛选技术, 通过Exendin-4竞争性洗脱筛选GLP-1受体激动剂, 得到了12肽模拟物EPA. 细胞增殖实验结果表明: EPA和Exendin-4均可促进胰岛β细胞增殖活性, 在40~200 μmol/L内, EPA比Exendin-4的活性高5%~25%; 在100 mmol/L高浓度葡萄糖毒性下, EPA通过抑制bax基因和上调bcl2基因表达及抑制Caspase3活性来抑制胰岛β细胞的凋亡; EPA是具有高活性的Exendin-4短肽模拟物, 可通过bcl-2/bax…Caspase3信号通路抑制线粒体的凋亡.

关键词: 肽库筛选, Exendin4模拟物, 生物活性, 葡萄糖毒性

Abstract: Using the technique of phage screening, we utilized the glucagonlike peptide1 receptor (GLP-1R) of RINm5F cell as the target to screen GLP-1 receptor agonists through competitive elution by Exendin-4 and obtained 12mer peptide mimics EPA. The experimental results show that EPA and Exendin4 can promote the proliferative activity of islet β cells, and the activity of EPA is 5%—25% higher than that of Exendin4 in the range of 40—200 μmol/L. EPA inhibits the apoptosis of islet β cells by inhibiting bax gene and upregulating bcl2 gene expression, and inhibiting Caspase3 activity at 100 mmol/L high concentration of glucose toxicity, EPA is a highactivity shortpeptide mimics of Exendin-4, which can inhibit the mitochondrial apoptosis through bcl-2/bax…Casepase3 signaling pathway.

Key words: peptide library screening, mimic of Exendin4, bioactivity, glucose toxicity

中图分类号: 

  • Q516