摘要
【目的】旨在构建轮状病毒(Rotavirus,RV)非结构蛋白1(NSP1)和3(NSP3)真核表达载体,并在人胚肾上皮HEK239T细胞中表达,随后研究轮状病毒NSP1和NSP3在体外初步影响IFN-β/ISRE报告基因活性。【方法】首先合成猿轮状病毒SA11株NSP1、NSP3编码基因连接到克隆载体pUCm-T上,通过PCR技术扩增目的片段,再以真核表达载体pRK-Flag、pRK-HA为骨架构建出可特异性表达重组蛋白pRK-Flag-NSP1/pRK-HA-NSP1、pRK-Flag-NSP3/pRK-HA-NSP3的真核表达质粒,经酶切及测序鉴定正确后将质粒转染到HEK293T细胞中,通过Western blot鉴定NSP1/NSP3蛋白的表达。随后,将重组质粒pRK-Flag-NSP1/pRK-Flag-NSP3与IFN-β-Luc/ISRE-Luc质粒共转染至HEK239T细胞,经RIG-IN(RIG-I活化结构域)的刺激后利用双荧光素酶报告基因系统判定NSP1/NSP3蛋白对IFN-β/ISRE报告基因活性的影响。【结果】成功克隆了NSP1和NSP3全长基因,构建了猿轮状病毒SA11株NSP1、NSP3蛋白真核表达质粒pRK-Flag-NSP1/pRK-HA-NSP1、pRK-Flag-NSP3/pRK-HA-NSP3,并在HEK293T细胞中转染表达,Western blot确定了NSP1和NSP3蛋白成功表达。重组质粒pRK-Flag-NSP1和pRK-Flag-NSP3可显著降低RIG-IN诱导的双荧光素酶活性。【结论】NSP1和NSP3蛋白可抑制RIG-IN刺激的IFN-β和ISRE启动子活性,证明NSP3蛋白和已报道的NSP1蛋白一样具有抑制IFN-β信号通路的功能,为深入研究NSP3蛋白调控Ⅰ型干扰素信号通路的作用机制奠定理论基础。
【Objective】The present paper aimed to construct the eukaryotic expression vector of rotavirus(Rotavirus, RV)non-structural protein1(NSP1)and 3(NSP3)and express it in human embryonic kidney epithelial HEK239 T cells, and then to study the preliminary effect of rotavirus NSP3 on the activity of IFN-β/ISRE reporter gene in vitro. 【Method】First, the NSP1 and NSP3 coding genes of ape rotavirus SA11 strain were synthesized and cloned into the cloning vector pUCm-T, the target fragments of NSP1 and NSP3 were amplified by PCR, and then the eukaryotic expression plasmids specifically expressing recombinant proteins pRK-Flag-NSP1/pRK-HA-NSP1 and pRK-Flag-NSP3/pRK-HA-NSP3 were constructed by using eukaryotic expression vectors pRK-Flag and pRK-HA as skeletons. The plasmids were transfected into HEK293 T cells after restriction endonuclease digestion and sequencing. The expression of NSP1/NSP3 protein was identified by Western blot. Then, the recombinant plasmid pRK-Flag-NSP1/pRK-Flag-NSP3 and IFN-β-Luc/ISRE-Luc plasmid were co-transfected into HEK239 T cells. After stimulated by RIG-IN(RIG-I activation domain), the effect of NSP1/NSP3 protein on the activity of IFN-β/ISRE reporter gene was determined by double luciferase reporter gene system. 【Result】 The full-length genes of NSP1 and NSP3 were cloned successfully, and the eukaryotic expression plasmids pRK-Flag-NSP1/pRK-HA-NSP1 and pRK-Flag-NSP3/pRK-HA-NSP3, of NSP1 and NSP3 protein of ape rotavirus strain SA11 were constructed. The successful expression of NSP1 and NSP3 protein was confirmed by transfection and expression of Western blot in HEK293 T cells. Recombinant plasmids pRK-Flag-NSP1 and pRK-Flag-NSP3 could significantly reduce the activity of double luciferase induced by RIG-IN. 【Conclusion】 NSP1 and NSP3 proteins can inhibit the activities of IFN-β and ISRE promoters stimulated by RIG-IN, which proves that NSP3 protein has the same function as NSP1 protein in inhibiting IFN-β signal pathway, which lays a theoretical foundation for further stu
作者
李凤迪
王嘉瑞
刘新宇
黄海岩
叶丽萍
曾艳
曹欣
LI Feng-di;WANG Jia-rui;LIU Xin-yu;HUANG Hai-yan;YE Li-ping;ZENG Yan;CAO Xin(Key Laboratory of Biotechnology&Bioengineering of State Ethnic Affairs Commission,Biomedical Research Center,Northwest Minzu U-niversity,Lanzhou 730030,China;Gansu Tech Innovation Center of Animal Cell,Biomedical Research Center,Northwest Minzu University,Lanzhou 730030,China;College of Life Science and Engineering,Northwest Minzu University,Lanzhou 730030,China;College of Animal Science and Technology,Jilin Agricultural University,Jilin Animal Microecological Preparation Engineering Research Center,Changchun 130118,China)
出处
《西南农业学报》
CSCD
北大核心
2022年第2期469-474,共6页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金(81760287)
吉林省科技发展计划(20190301042NY,20200402041NC)
吉林省教育厅“十三五”科学技术项目(JJKH20200360KJ)。
