Background Novel influenza A viruses of avian-origin may be the precursors of pandemic strains. This descriptive study aims to introduce a novel avian-origin influenza A （H10N8） virus which can infect humans and cau...Background Novel influenza A viruses of avian-origin may be the precursors of pandemic strains. This descriptive study aims to introduce a novel avian-origin influenza A （H10N8） virus which can infect humans and cause severe diseases. Methods Collecting clinical data of three cases of human infection with a novel reassortment avian influenza A （H10N8） virus in Nanchang, Jiangxi Province, China. Results Three cases of human infection with a new reassortment avian influenza A（H10N8） virus were described, of which two were fatal cases, and one was severe case. These cases presented with severe pneumonia that progressed to acute respiratory distress syndrome （ARDS） and intractable respiratory failure. Conclusion This novel reassortment avian influenza A （H10N8） virus in China resulted in fatal human infections, and should be added to concerns in clinical practice.展开更多
In 2013, two episodes of influenza emerged in China and caused worldwide concern. A new H7N9 avian influenza virus （AIV） first appeared in China on February 19, 2013. By August 31, 2013, the virus had spread to ten ...In 2013, two episodes of influenza emerged in China and caused worldwide concern. A new H7N9 avian influenza virus （AIV） first appeared in China on February 19, 2013. By August 31, 2013, the virus had spread to ten provinces and two metropolitan cities. Of 134 patients with H7N9 influenza, 45 died （Chen et al., 2013; Li et al., 2014）.From then on, epidemics emerged sporadically in China and resulted in several victims.展开更多
为了解从江苏某活禽市场分离鉴定出的一株鸽源H10N8亚型禽流感病毒(AIV)A/pigeon/Jiangsu/JYP090602/2019株的生物学特性,本研究对该分离株进行空斑纯化和全基因组测序,并以10^(6) EID_(50)病毒感染BALB/c小鼠进行致病性研究。序列分析...为了解从江苏某活禽市场分离鉴定出的一株鸽源H10N8亚型禽流感病毒(AIV)A/pigeon/Jiangsu/JYP090602/2019株的生物学特性,本研究对该分离株进行空斑纯化和全基因组测序,并以10^(6) EID_(50)病毒感染BALB/c小鼠进行致病性研究。序列分析结果显示,该病毒HA基因的裂解位点为334PEIMQGR↓GLF^(343),只含有一个碱性氨基酸,为低致病性AIV的分子特征。其HA基因与A/chicken/Zhejiang/102622/2016(H10N8)株HA基因的同源性达98.7%,NA基因与A/pigeon/Longquan/LQ67/2016(H2N8)株NA基因的同源性达96.5%,内部基因PB2、PB1、PA、M、NP和NS分别与H7N3、H1N9、H10N7、H1N2、H7N3和H11N3亚型AIV相应基因的同源性最高,具有遗传多样性。小鼠感染试验结果显示,该病毒仅引起小鼠体质量轻微变化,但能够在小鼠的肺脏和心脏中复制,肺脏病毒滴度为4.74 lg EID_(50)/mL,且可引起肺部组织病变。上述结果表明该病毒株为新型重组病毒,对小鼠具有一定致病性,本研究为H10亚型禽流感的预警和防控提供一定的参考依据。展开更多
目的制备并筛选H10N8型禽流感病毒血凝素蛋白的中和抗体,并对其抗原结合位点进行鉴定。方法采用基因工程技术制备H10N8血凝素蛋白单克隆抗体,通过假病毒微量中和实验筛选中和抗体,ELISA和Western blot实验确定抗体结合血凝素蛋白的区域,...目的制备并筛选H10N8型禽流感病毒血凝素蛋白的中和抗体,并对其抗原结合位点进行鉴定。方法采用基因工程技术制备H10N8血凝素蛋白单克隆抗体,通过假病毒微量中和实验筛选中和抗体,ELISA和Western blot实验确定抗体结合血凝素蛋白的区域,Discovery Studio 3.5模拟与对接分析软件预测抗原结合位点,进而研究其在H10亚型内的保守性。结果获得1株具有假病毒中和活性的H10N8单克隆抗体,该抗体的结合表位在HA1上,且具有H10亚型内的保守性。结论成功制备1株中和抗体,为H10N8禽流感疫苗和单克隆药物的研究提供了基础。展开更多
文摘Background Novel influenza A viruses of avian-origin may be the precursors of pandemic strains. This descriptive study aims to introduce a novel avian-origin influenza A （H10N8） virus which can infect humans and cause severe diseases. Methods Collecting clinical data of three cases of human infection with a novel reassortment avian influenza A （H10N8） virus in Nanchang, Jiangxi Province, China. Results Three cases of human infection with a new reassortment avian influenza A（H10N8） virus were described, of which two were fatal cases, and one was severe case. These cases presented with severe pneumonia that progressed to acute respiratory distress syndrome （ARDS） and intractable respiratory failure. Conclusion This novel reassortment avian influenza A （H10N8） virus in China resulted in fatal human infections, and should be added to concerns in clinical practice.
基金Project supported by the National Key Research and Development Program of China(No.2017YFC1200203)the Open Fund of Shanghai Key Laboratory of Meteorology and Health(No.QXJK201605)+1 种基金the National Natural Science Foundation of China(No.71363001)the Fourth Round of Three-Year Public Health Action Plan of Shanghai(Nos.15GWZK0101 and 15GWZK0202),China
文摘In 2013, two episodes of influenza emerged in China and caused worldwide concern. A new H7N9 avian influenza virus （AIV） first appeared in China on February 19, 2013. By August 31, 2013, the virus had spread to ten provinces and two metropolitan cities. Of 134 patients with H7N9 influenza, 45 died （Chen et al., 2013; Li et al., 2014）.From then on, epidemics emerged sporadically in China and resulted in several victims.
文摘为了解从江苏某活禽市场分离鉴定出的一株鸽源H10N8亚型禽流感病毒(AIV)A/pigeon/Jiangsu/JYP090602/2019株的生物学特性,本研究对该分离株进行空斑纯化和全基因组测序,并以10^(6) EID_(50)病毒感染BALB/c小鼠进行致病性研究。序列分析结果显示,该病毒HA基因的裂解位点为334PEIMQGR↓GLF^(343),只含有一个碱性氨基酸,为低致病性AIV的分子特征。其HA基因与A/chicken/Zhejiang/102622/2016(H10N8)株HA基因的同源性达98.7%,NA基因与A/pigeon/Longquan/LQ67/2016(H2N8)株NA基因的同源性达96.5%,内部基因PB2、PB1、PA、M、NP和NS分别与H7N3、H1N9、H10N7、H1N2、H7N3和H11N3亚型AIV相应基因的同源性最高,具有遗传多样性。小鼠感染试验结果显示,该病毒仅引起小鼠体质量轻微变化,但能够在小鼠的肺脏和心脏中复制,肺脏病毒滴度为4.74 lg EID_(50)/mL,且可引起肺部组织病变。上述结果表明该病毒株为新型重组病毒,对小鼠具有一定致病性,本研究为H10亚型禽流感的预警和防控提供一定的参考依据。
文摘目的制备并筛选H10N8型禽流感病毒血凝素蛋白的中和抗体,并对其抗原结合位点进行鉴定。方法采用基因工程技术制备H10N8血凝素蛋白单克隆抗体,通过假病毒微量中和实验筛选中和抗体,ELISA和Western blot实验确定抗体结合血凝素蛋白的区域,Discovery Studio 3.5模拟与对接分析软件预测抗原结合位点,进而研究其在H10亚型内的保守性。结果获得1株具有假病毒中和活性的H10N8单克隆抗体,该抗体的结合表位在HA1上,且具有H10亚型内的保守性。结论成功制备1株中和抗体,为H10N8禽流感疫苗和单克隆药物的研究提供了基础。
