目的:观察不同免疫途径和佐剂类型对柯萨奇病毒B组3型(Coxsackievirus group B type 3,CVB3)衣壳蛋白VP1免疫效果的影响。方法:将原核表达质粒pET-his/VP1转入E.coli BL21(DE3)pLysS中,用异丙基-1-硫代-β呋喃半乳糖苷(IPTG)诱导CVB3VP...目的:观察不同免疫途径和佐剂类型对柯萨奇病毒B组3型(Coxsackievirus group B type 3,CVB3)衣壳蛋白VP1免疫效果的影响。方法:将原核表达质粒pET-his/VP1转入E.coli BL21(DE3)pLysS中,用异丙基-1-硫代-β呋喃半乳糖苷(IPTG)诱导CVB3VP1蛋白的表达并进行纯化。首先采用不同的免疫途径(皮下,腹腔,肌肉)用VP1蛋白免疫小鼠,每组12只。然后另取小鼠分为PBS组和不同佐剂组(氢氧化铝、弗氏佐剂、Montanide ISA720),每组18只,采用肌肉注射途径免疫。每次每只小鼠注射50μg,共免疫3次,间隔3周。用ELISA和微量中和试验检测血清特异性IgG抗体和中和抗体。用CCK-8法检测淋巴细胞增殖活性和CTL杀伤活性。用致死量的CVB3攻击后,检测血中病毒的滴度并观察小鼠的存活状况。结果:在大肠杆菌中成功表达CVB3VP1蛋白。三种免疫途径比较,肌肉注射组血清中和抗体和特异性IgG抗体的水平明显高于其他组(P<0.01)。采用肌肉注射免疫时,弗氏佐剂组Montanide ISA 720佐剂组的体液免疫和细胞免疫应答的水平明显高于氢氧化铝组(P<0.05);但血中病毒的滴度低于氢氧化铝组(P<0.05)。弗氏佐剂组小鼠的生存率好于氢氧化铝组(P<0.05)。结论:采用肌肉注射途径,并联合弗氏佐剂或Montanide ISA 720佐剂可以使CVB3VP1免疫获得较好的免疫效果。展开更多
Objective:To explore the mechanism by which icariin alleviates viral myocarditis.Methods:CVB3-induced cardiomyocytes were used as an in vitro model of viral myocarditis to assess the effects of icariin treatment on ce...Objective:To explore the mechanism by which icariin alleviates viral myocarditis.Methods:CVB3-induced cardiomyocytes were used as an in vitro model of viral myocarditis to assess the effects of icariin treatment on cell viability,inflammation,and apoptosis.Moreover,the effects of icariin on ferroptosis and TLR4 signaling were assessed.After AC16 cells were transfected with TLR4 overexpression plasmids,the role of TLR4 in mediating the regulatory effect of icariin in viral myocarditis was investigated.Results:Icariin significantly elevated cell viability and reduced inflammatory factors TNF-α,IL-1β,IL-6,and IL-18.Flow cytometry revealed that icariin decreased apoptosis rate,and the protein expression of Bax and cleaved caspase 3 and 9 in CVB3-induced cardiomyocytes.Additionally,it suppressed ferroptosis including lipid peroxidation and ferrous ion,as well as the TLR4 signaling.However,TLR4 overexpression abrogated the modulatory effects of icariin.Conclusions:Icariin mitigates CVB3-induced myocardial injury by inhibiting TLR4-mediated ferroptosis.Further animal study is needed to verify its efficacy.展开更多
目的从人心脏cDNA文库中筛选与B3型柯萨奇病毒(coxsackievirus group B type 3,CVB3)结构蛋白VP3相互作用的蛋白,为进一步研究CVB3分子致病机制提供新的线索。方法构建酵母双杂交重组质粒(pGBKT7-VP3),转化至感受态酵母菌AH109,检测BD-c...目的从人心脏cDNA文库中筛选与B3型柯萨奇病毒(coxsackievirus group B type 3,CVB3)结构蛋白VP3相互作用的蛋白,为进一步研究CVB3分子致病机制提供新的线索。方法构建酵母双杂交重组质粒(pGBKT7-VP3),转化至感受态酵母菌AH109,检测BD-cMyc-VP3融合蛋白自激活,应用酵母双杂交筛选与CVB3VP3相互作用的人心脏蛋白。对阳性候选克隆进行测序和同源性比对分析;α-半乳糖苷酶活性定量分析VP3与各阳性蛋白之间相互作用的强弱。结果诱饵质粒pGBKT7-VP3构建成功,检测到BD-cMyc-VP3融合蛋白在AH109中表达,且诱饵蛋白VP3在酵母中不存在自激活,从人心脏cDNA文库中筛选到10个与CVB3VP3相互作用的蛋白:真核翻译起始因子4A2、羟酰辅酶A脱氢酶三官能蛋白转录变体3、肌钙蛋白I3型、平滑肌蛋白3、线粒体乙醛脱氢酶2等。结论本研究成功应用酵母双杂交技术筛选出与CVB3VP3相互作用的10个蛋白。为研究CVB3引起心肌炎和心肌疾病的分子致病机制提供了一些新的线索。展开更多
文摘目的:观察不同免疫途径和佐剂类型对柯萨奇病毒B组3型(Coxsackievirus group B type 3,CVB3)衣壳蛋白VP1免疫效果的影响。方法:将原核表达质粒pET-his/VP1转入E.coli BL21(DE3)pLysS中,用异丙基-1-硫代-β呋喃半乳糖苷(IPTG)诱导CVB3VP1蛋白的表达并进行纯化。首先采用不同的免疫途径(皮下,腹腔,肌肉)用VP1蛋白免疫小鼠,每组12只。然后另取小鼠分为PBS组和不同佐剂组(氢氧化铝、弗氏佐剂、Montanide ISA720),每组18只,采用肌肉注射途径免疫。每次每只小鼠注射50μg,共免疫3次,间隔3周。用ELISA和微量中和试验检测血清特异性IgG抗体和中和抗体。用CCK-8法检测淋巴细胞增殖活性和CTL杀伤活性。用致死量的CVB3攻击后,检测血中病毒的滴度并观察小鼠的存活状况。结果:在大肠杆菌中成功表达CVB3VP1蛋白。三种免疫途径比较,肌肉注射组血清中和抗体和特异性IgG抗体的水平明显高于其他组(P<0.01)。采用肌肉注射免疫时,弗氏佐剂组Montanide ISA 720佐剂组的体液免疫和细胞免疫应答的水平明显高于氢氧化铝组(P<0.05);但血中病毒的滴度低于氢氧化铝组(P<0.05)。弗氏佐剂组小鼠的生存率好于氢氧化铝组(P<0.05)。结论:采用肌肉注射途径,并联合弗氏佐剂或Montanide ISA 720佐剂可以使CVB3VP1免疫获得较好的免疫效果。
基金supported by Affiliated Hospital of Youjiang Medical University for Nationalities(No.Y20212615).
文摘Objective:To explore the mechanism by which icariin alleviates viral myocarditis.Methods:CVB3-induced cardiomyocytes were used as an in vitro model of viral myocarditis to assess the effects of icariin treatment on cell viability,inflammation,and apoptosis.Moreover,the effects of icariin on ferroptosis and TLR4 signaling were assessed.After AC16 cells were transfected with TLR4 overexpression plasmids,the role of TLR4 in mediating the regulatory effect of icariin in viral myocarditis was investigated.Results:Icariin significantly elevated cell viability and reduced inflammatory factors TNF-α,IL-1β,IL-6,and IL-18.Flow cytometry revealed that icariin decreased apoptosis rate,and the protein expression of Bax and cleaved caspase 3 and 9 in CVB3-induced cardiomyocytes.Additionally,it suppressed ferroptosis including lipid peroxidation and ferrous ion,as well as the TLR4 signaling.However,TLR4 overexpression abrogated the modulatory effects of icariin.Conclusions:Icariin mitigates CVB3-induced myocardial injury by inhibiting TLR4-mediated ferroptosis.Further animal study is needed to verify its efficacy.
文摘目的从人心脏cDNA文库中筛选与B3型柯萨奇病毒(coxsackievirus group B type 3,CVB3)结构蛋白VP3相互作用的蛋白,为进一步研究CVB3分子致病机制提供新的线索。方法构建酵母双杂交重组质粒(pGBKT7-VP3),转化至感受态酵母菌AH109,检测BD-cMyc-VP3融合蛋白自激活,应用酵母双杂交筛选与CVB3VP3相互作用的人心脏蛋白。对阳性候选克隆进行测序和同源性比对分析;α-半乳糖苷酶活性定量分析VP3与各阳性蛋白之间相互作用的强弱。结果诱饵质粒pGBKT7-VP3构建成功,检测到BD-cMyc-VP3融合蛋白在AH109中表达,且诱饵蛋白VP3在酵母中不存在自激活,从人心脏cDNA文库中筛选到10个与CVB3VP3相互作用的蛋白:真核翻译起始因子4A2、羟酰辅酶A脱氢酶三官能蛋白转录变体3、肌钙蛋白I3型、平滑肌蛋白3、线粒体乙醛脱氢酶2等。结论本研究成功应用酵母双杂交技术筛选出与CVB3VP3相互作用的10个蛋白。为研究CVB3引起心肌炎和心肌疾病的分子致病机制提供了一些新的线索。
