生物技术通报 ›› 2020, Vol. 36 ›› Issue (3): 110-114.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0270

• 基因编辑专题(专题主编 谷峰 研究员) • 上一篇    下一篇

构建基于CRISPR/Cas9技术敲除ALOX5的质粒

梅芬1, 2, 李瑞玮1, 3, 张娟娟1, 左荣霞1, 邹云莲1, 沈涛1, 撒亚莲1   

  1. 1. 昆明理工大学附属医院 云南省第一人民医院临床基础医学研究所 云南省出生缺陷与遗传病研究重点实验室 云南省临床病毒学重点实验室,昆明 650032;
    2. 华中科技大学同济医学院生殖医学中心(武汉同济生殖医学专科医院),武汉 430030;
    3. 云南省第三人民医院生殖遗传科,昆明 650011
  • 收稿日期:2019-04-08 出版日期:2020-03-26 发布日期:2020-03-17
  • 作者简介:梅芬,女,硕士研究生,研究方向:疾病相关基因;E-mail:752395090@qq.com;李瑞玮为共同第一作者
  • 基金资助:

    国家自然科学基金项目(31460298),云南省卫生厅内设机构资助项目(2016NS225),云南省科技厅-昆医联合专项(2015FB102)

Construction of Plasmids for Knocking out ALOX5 Gene Using CRISPR/Cas9 Technology

MEI Fen1, 2, LI Rui-wei1, 3, ZHANG Juan-juan1, ZUO Rong-xia1, ZOU Yun-lian1, SHEN Tao1, SA Ya-lian1   

  1. 1. Institute of Clinical and Basic Medical Sciences,The First People’s Hospital of Yunnan Province(Yunnan Provincial Key Laboratory of Clinical Virology,Key Laboratory for Birth Defects and Genetic Diseases),Kunming 650032;
    2. Center of Reproductive Medicine,Tongji Medical College(Reproduce Medicine Hospital of Tongji Medical College),Huazhong Science and Technological University,Wuhan 430030;
    3. Department of Reproductive Genetics,The Third People’s Hospital of Yunnan Province,Kunming 650011;
  • Received:2019-04-08 Published:2020-03-26 Online:2020-03-17

摘要:

旨在利用CRISPR/Cas9技术构建敲除花生四烯5-脂氧合酶基因(Arachidonate 5-lipoxygenase gene,ALOX5)的重组质粒。设计合成3对靶向敲除ALOX5第六外显子的sgRNA,将其分别插入到CRISPR/Cas9质粒骨架pX458载体中,转化感受态大肠杆菌DH5α后挑取克隆,通过测序评估重组质粒是否构建成功。将构建好的重组质粒转染293T细胞,在荧光显微镜下观察转染效果,挑取转染成功的细胞,用试剂盒提取转染细胞基因组DNA,PCR扩增含敲除位点的DNA片段,用测序技术获得核苷酸序列,用DNAStar软件分析转染细胞中ALOX5基因敲除情况。测序结果表明2对双链sgRNA寡核苷酸已插入质粒,且序列正确,靶向ALOX5 基因的重组质粒pX458-sgRNAs-ALOX5构建成功。其在293T细胞中的转染效率约为50%,用一代测序法未检测到sgRNAs的切割效果。初步表明利用CRISPR/Cas9技术成功构建靶向ALOX5 基因的重组质粒pX458-sgRNAs-ALOX5。

关键词: ALOX5, CRISPR/Cas9, 基因敲除, 构建, 质粒

Abstract:

This work aims to construct the plasmids targeting for ALOX5 gene knockout by CRISPR/Cas9 technology. Three pairs of oligonucleotides sgRNAs targeting exon 6 of ALOX5 gene were designed,chemically synthesized,and inserted into linearized plasmids pX458,respectively. The recombinant plasmids pX458-sgRNAs-ALOX5 was then transformed into competent Escherichia coli DH5α. Whether or not recombinant plasmids were constructed successfully was evaluated by Sanger sequencing. The constructed recombinant plasmids were transfected into 293T cells,and the transfection efficiency was observed under fluorescence microscope. Then their genomic DNA derived from the successfully-transfected cells were extracted by the reagent kit. The DNA fragment with target gene knockout was amplified by PCR,the nucleotides were obtained by sequencing,and the knockout of ALOX5 gene in the transfected cells was analyzed by DNAStar software. The sequencing results revealed that 2 pairs of double stranded sgRNA oligodeoxynucleotides were successfully inserted into the plasmids with correct sequences,and the construction of recombinant plasmid pX458-sgRNAs-ALOX5 targeting ALOX5 gene was successful. The transfection efficiency of pX458-sgRNAs-ALOX5 in 293T was about 50%;however,cleaving effect was not detected by Sanger sequencing. In summary,the CRISPR/Cas9-based plasmids pX458-sgRNAs targeting the exon 6 of ALOX5 gene is successfully constructed.

Key words: ALOX5, CRISPR/Cas9, gene knock out, construction, plasmids