生物技术通报 ›› 2016, Vol. 32 ›› Issue (9): 172-178.doi: 10.13560/j.cnki.biotech.bull.1985.2016.09.023

• 研究报告 • 上一篇    下一篇

少棘蜈蚣抗菌肽scolopin 2的克隆、表达与抗癌机制研究

侯欢欢, 卢佳, 章纬菁, 黄芳任文华   

  1. 南京师范大学生命科学学院,南京 210046
  • 收稿日期:2016-01-14 出版日期:2016-09-25 发布日期:2016-10-10
  • 作者简介:侯欢欢,女,硕士研究生,研究方向:生物大分子活性物质,E-mail:houhuanhuan123@126.com;卢佳为本文并列第一作者
  • 基金资助:
    国家自然科学基金项目(31370401),江苏省高校优势学科建设工程项目(PAPD)

Cloning,Expression and Anticancer Mechanism of Scolopin 2,an Antimicrobial Peptide from Centipede Venoms(Scolopendra subspinipes mutilans)

HOU Huan-huan, LU Jia, ZHANG Wei-jing, HUANG Fang, REN Wen-hua   

  1. College of Life Sciences,Nanjing Normal University,Nanjing 210046
  • Received:2016-01-14 Published:2016-09-25 Online:2016-10-10

摘要: 旨在研究AMP-scolopin 2的抗菌活性和抗癌机理。利用SUMO融合技术对AMP-scolopin 2进行了体外表达;采用抑菌圈、MTT、流式细胞术和Western blotting等技术分析了其抗菌活性、溶血活性和对肿瘤细胞的促凋亡作用。结果表明,成功表达并纯化了AMP-scolopin 2;AMP-scolopin 2对白血病细胞(K562)和肝细胞癌(HepG2)具有抑制增殖和促凋亡作用,但对红细胞和正常细胞HEK293的影响很小;AMP-scolopin 2(40 μmol/L)可以诱导K562(21.4%)和HepG2(18.5%)细胞凋亡;此外,AMP-scolopin 2下调了与线粒体相关的凋亡蛋白pro-caspase-3、pro-caspase-9和pro-PARP的表达,且呈浓度依赖性。AMP-scolopin 2可以通过线粒体caspase依赖性途径促进肿瘤细胞凋亡。

关键词: 蜈蚣, 抗菌肽scolopin 2, SUMO, 抗菌活性, 细胞凋亡

Abstract: This work is to explore the antimicrobial activity and anticancer mechanism of AMP-scolopin 2. The small ubiquitin-related modifier(SUMO)fusion technology was applied in the expression of AMP-scolopin 2 in vitro. The technologies of inhibition zone assay,MTT,cytotoxicity assay,flow cytometry and Western blotting were utilized to analyze its antimicrobial and hemolytic activity as well as apoptotic effects on cancer cells. As results,AMP-scolopin 2 was successfully expressed and purified. The AMP-scolopin 2 inhibited the proliferation of K562 leukemia cells and HepG2 hepatocellular carcinoma,while it had only a minimal effect on erythrocytes and normal HEK293 cells. AMP-scolopin 2(40 μmol/L)induced the apoptosis of 21.4% K562 leukemia cells and 18.5% HepG2 hepatocellular carcinoma respectively. In addition,AMP-scolopin 2 down-regulated the expression level of apoptosis proteins(pro-caspase-3,-9 and pro-PARP)that were related to mitochondria in a dose-dependent mode. In summary,the present study indicates that AMP-scolopin 2 promotes the apoptosis of tumor cells in vitro through mitochondrial caspase-dependent pathway.

Key words: centipede, AMP-scolopin 2, SUMO, antimicrobial activity, apoptosis