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2025年4月5日 星期六
农业生物技术学报  2022, Vol. 30 Issue (5): 1023-1030    DOI: 10.3969/j.issn.1674-7968.2022.05.019
  研究资源与技术改进 本期目录 | 过刊浏览 | 高级检索 |
基于CRISPR/Cas9系统的多基因敲除载体的构建及其敲除效率检测
徐磊1, 赵育蓉1, 胡悦旻1, 王昊1, 彭玥晗1, 鞠辉明1,2,3,*
1 扬州大学 兽医学院 ,扬州 225009;
2 江苏省动物重要疫病与人兽共患病防控协同创新中心 ,扬州 225009;
3 扬州大学 广陵学院 ,扬州 225009
Construction and Knockout Efficiency Detection of Multiple Knockout Vector Based on the CRISPR/Cas9 System
XU Lei1, ZHAO Yu-Rong1, HU Yue-Min1, WANG Hao1, PENG Yue-Han1, JU Hui-Ming1,2,3,*,
1 College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
2 Jiangsu Collaborative Innovation Center for Animal Epidemics and Zoonoses, Yangzhou 225009, China;
3 College of Guangling, Yangzhou University, Yangzhou 225009, China
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摘要 CRISPR/Cas9 系统是近年来快速发展的一种简单高效的基因编辑系统。在哺乳动物中,同时靶 向敲除多基因的研究仍然较为匮乏。为优化哺乳动物中靶向多基因的敲除系统的构建,本研究在已有的 CRISPR/Cas9 载 体 的 基 础 上 进 行 升 级 改 造 ,将 4 个 U6 启 动 子 介 导 的 小 向 导 RNA (small guide RNA, sgRNA)表达框串联至一个载体中的形式制备了多基因位点编辑载体,分别选取家猪(Susscrofa)的去乙酰化 酶 3 基 因 (sirtuin 3, Sirt3) 和 围 脂 滴 蛋 白 1 基 因 (perilipin 1, Plin1) 的 2 个 sgRNA,构 建 了 2 个 猪 Sirt3 sgRNA 的基因编辑载体(S2)、2 个猪 Plin1 sgRNA 基因编辑载体(P2)和同时包括上述 4 个 sgRNA 的基因编 辑载体(S2P2),上述载体分别转染猪肾细胞 PK15,以转染未装载靶点质粒的细胞为对照组(CON 组),在各实验组细胞目的基因的 DNA 水平、RNA 水平和蛋白水平检测目的基因敲除效率。结果表明,各实验组 细胞目的基因 DNA 中均检测出突变,S2P2 组和 S2 组中 Sirt3 基因突变率分别为 33% 和 26%,S2P2 组和 P2 组中 Plin1 基因突变率分别为 33% 和 24%;对目的基因 RNA 水平与蛋白水平的检测结果表明,与 CON 组 相比,所有实验组的目标基因 mRNA 及蛋白表达量均有所下降,差异极显著(P<0.01),其中 S2 组与 S2P2 组间 Sirt3 基因表达量差异不显著;P2 组与 S2P2 组间 Plin1 基因表达量差异不显著。本研究通过改良的 CRISPR/Cas9 载体系统构建了可以同时对猪 Sirt3 基因和 Plin1 基因高效编辑的载体,有助于后续开展多基因功能的研究。
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徐磊
赵育蓉
胡悦旻
王昊
彭玥晗
鞠辉明
关键词 CRIPSR/Cas9多基因敲除载体构建    
Abstract:The CRISPR/Cas9 system is a simple and efficient gene editing system that has been rapidly developed in recent years. In mammals, research on knocking out multiple genes simultaneously is still scarce. In order to optimize the construction of a knock-out system targeting multiple genes in mammals, the existing CRISPR/Cas9 vector was upgraded in this study, a multi-targets knock-out plasmid based on CRISPR/Cas9 system cascading by 4 small guide RNA (sgRNA) expression cassettes mediated by U6 promoters was constructed. Sirtuin 3 gene (Sirt3) and Perilipin 1 gene (Plin1) of Sus scrofa were chosen to assess the upgraded plasmid. 2 sgRNA targeting Plin1 and Sirt3 were selected respectively, and the knock-out vectors were constructed by inserting the sgRNA based on the upgraded plasmid. In this study, PK15 were divided into 4 groups. The control group CON was the cells transfected by the upgraded plasmid without any targets. The group S2 was the cells cotransfected 2 vectors targeting the Sirt3, while the group P2 was cotransfected 2 vectors targeting the Plin1, and the group S2P2 was cotransfected the vector contains all the targets. Detect the target gene mutation rate of each experimental group cell at the cell genomic DNA level, and use qPCR and Western blot to determine expression of RNA and protein of the target gene expression of each group of cells. The results showed that mutations were detected in the cells of each experimental group. Mutation rates of Sirt3 gene in S2P2 and S2 were 33% and 26%, respectively. Plin1 gene mutation rates in S2P2 and P2 groups were 33% and 24%, respectively. And compared with the CON group, the target mRNA and protein expression levels decreased in all experimental groups, the difference was extremely significant (P<0.01). Among them, there was no significant difference in Sirt3 gene expression between S2 group and S2P2 group and in Plin1 gene expression between P2 group and S2P2 group. In this study, a vector that can simultaneously knockout porcine Sirt3 and Plin1 genes was constructed through the improved CRISPR/Cas9 vector system. This research is helpful to the subsequent study of multi-gene function.
Key wordsCRIPSR/Cas9    Multiple gene knockout    Vector construction
收稿日期: 2021-05-18     
ZTFLH:  S828.8  
  Q812  
基金资助:江苏省自然科学基金(BK20201224); 国家自然科学基金(31872323); 江苏高校优势学科建设工程资助项目 (2018); 江苏高校品牌专业建设工程资助项目(TAAP,2018-2022); 扬州大学大学生创新创业训练计划项目(X20200705)
通讯作者: *hmju@yzu.edu.cn   
引用本文:   
徐磊, 赵育蓉, 胡悦旻, 王昊, 彭玥晗, 鞠辉明. 基于CRISPR/Cas9系统的多基因敲除载体的构建及其敲除效率检测[J]. 农业生物技术学报, 2022, 30(5): 1023-1030.
XU Lei, ZHAO Yu-Rong, HU Yue-Min, WANG Hao, PENG Yue-Han, JU Hui-Ming,. Construction and Knockout Efficiency Detection of Multiple Knockout Vector Based on the CRISPR/Cas9 System. 农业生物技术学报, 2022, 30(5): 1023-1030.
链接本文:  
http://journal05.magtech.org.cn/Jwk_ny/CN/10.3969/j.issn.1674-7968.2022.05.019     或     http://journal05.magtech.org.cn/Jwk_ny/CN/Y2022/V30/I5/1023
 
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