小反刍兽疫(Peste des petits ruminants,PPR)是由小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)引起山羊、绵羊等小反刍动物的一种急性烈性高度接触性传染病,致死率高。该病被世界动物卫生组织(OIE)列为A类疫病,也是我国规...小反刍兽疫(Peste des petits ruminants,PPR)是由小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)引起山羊、绵羊等小反刍动物的一种急性烈性高度接触性传染病,致死率高。该病被世界动物卫生组织(OIE)列为A类疫病,也是我国规定的Ⅰ类动物疫病。迄今,全球超过70个国家确认境内发现PPR。2014年起,我国先后有25个省市自治区先后发生PPR疫情。PPRV感染宿主后传播迅速是其致病的主要特征,探寻该病毒感染宿主后的传播途径及其机制是该领域亟待解决的突出问题。外泌体(Exosomes)是一类介导细胞间通讯的纳米级囊泡.展开更多
The use of sulfur hexafiuoride (SF6) as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are wel...The use of sulfur hexafiuoride (SF6) as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are well accepted. As the complexity and size of underground mine ventilation networks increase, the ability of a SF6 to function as a convenient and rapid means of analysis diminishes. The utilization of multiple tracer gases can mitigate this by removing the need to purge the background presence of a tracer before conducting another release and allowing for a more comprehensive evaluation using multi-zone tech- niques. Recent studies have identified perfluoromethylcyclohexane (PMCH) as a possible supplement for SF6 in underground mine ventilation tracer studies. However, the deployment of PMCH remains a challenge because of this compounds physical properties. This paper evaluates a PMCH permeation plug release vessel (PPRV) under controlled turbulent conditions. The details of the experimental parameters used in the evaluation as well as a discussion regarding the performance of the PPRV are included.展开更多
病毒作为严格的细胞内寄生生物,能够劫持宿主铁代谢过程促进自身完成生命周期。2025年3月24日,西北农林科技大学王晶钰教授带领的研究团队在m Bio上发表了题为“The long noncoding RNA APR attenuates PPRV infection-induced accumula...病毒作为严格的细胞内寄生生物,能够劫持宿主铁代谢过程促进自身完成生命周期。2025年3月24日,西北农林科技大学王晶钰教授带领的研究团队在m Bio上发表了题为“The long noncoding RNA APR attenuates PPRV infection-induced accumulation of intracellular iron to inhibit membrane lipid peroxidation and viral replication”的研究论文,从铁代谢的角度揭示了小反刍兽疫病毒(PPRV)与宿主细胞相互作用的机制,展现出PPRV在感染过程中与宿主细胞围绕铁代谢这一重要“阵地”彼此斗争的复杂过程。展开更多
[目的]探究小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)感染引起的炎症反应并解析其致病机制。[方法]分离山羊肺泡巨噬细胞(PAM),利用qRT-PCR、ELISA及组织病理切片HE染色等方法分别检测PPRV感染后引起的炎性细胞因子表达...[目的]探究小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)感染引起的炎症反应并解析其致病机制。[方法]分离山羊肺泡巨噬细胞(PAM),利用qRT-PCR、ELISA及组织病理切片HE染色等方法分别检测PPRV感染后引起的炎性细胞因子表达、一氧化氮(NO)含量和炎性细胞侵润等现象。进一步利用转录组学测序分析PPRV感染PAM引起的差异基因、信号通路以及差异基因的表达情况。[结果]与正常山羊相比,感染PPRV的山羊其肝脏、肾脏及肺脏的部分细胞坏死并且呈现炎性细胞侵润的现象;与对照组相比,感染后的PAM细胞显著增加了NO含量(P<0.001);与未感染组相比,PPRV感染的PAM其炎性细胞因子IL-1β、TNF-α、IL-10等mRNA表达水平显著升高(P<0.05);此外,PPRV感染诱导的差异基因主要集中在炎症通路及NF-κB信号通路等。[结论]PPRV通过诱导大量炎性细胞侵润、增加炎性细胞因子表达,激活炎症信号通路从而产生炎症反应。展开更多
文摘小反刍兽疫(Peste des petits ruminants,PPR)是由小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)引起山羊、绵羊等小反刍动物的一种急性烈性高度接触性传染病,致死率高。该病被世界动物卫生组织(OIE)列为A类疫病,也是我国规定的Ⅰ类动物疫病。迄今,全球超过70个国家确认境内发现PPR。2014年起,我国先后有25个省市自治区先后发生PPR疫情。PPRV感染宿主后传播迅速是其致病的主要特征,探寻该病毒感染宿主后的传播途径及其机制是该领域亟待解决的突出问题。外泌体(Exosomes)是一类介导细胞间通讯的纳米级囊泡.
文摘The use of sulfur hexafiuoride (SF6) as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are well accepted. As the complexity and size of underground mine ventilation networks increase, the ability of a SF6 to function as a convenient and rapid means of analysis diminishes. The utilization of multiple tracer gases can mitigate this by removing the need to purge the background presence of a tracer before conducting another release and allowing for a more comprehensive evaluation using multi-zone tech- niques. Recent studies have identified perfluoromethylcyclohexane (PMCH) as a possible supplement for SF6 in underground mine ventilation tracer studies. However, the deployment of PMCH remains a challenge because of this compounds physical properties. This paper evaluates a PMCH permeation plug release vessel (PPRV) under controlled turbulent conditions. The details of the experimental parameters used in the evaluation as well as a discussion regarding the performance of the PPRV are included.
文摘病毒作为严格的细胞内寄生生物,能够劫持宿主铁代谢过程促进自身完成生命周期。2025年3月24日,西北农林科技大学王晶钰教授带领的研究团队在m Bio上发表了题为“The long noncoding RNA APR attenuates PPRV infection-induced accumulation of intracellular iron to inhibit membrane lipid peroxidation and viral replication”的研究论文,从铁代谢的角度揭示了小反刍兽疫病毒(PPRV)与宿主细胞相互作用的机制,展现出PPRV在感染过程中与宿主细胞围绕铁代谢这一重要“阵地”彼此斗争的复杂过程。
文摘[目的]探究小反刍兽疫病毒(Peste des petits ruminants virus,PPRV)感染引起的炎症反应并解析其致病机制。[方法]分离山羊肺泡巨噬细胞(PAM),利用qRT-PCR、ELISA及组织病理切片HE染色等方法分别检测PPRV感染后引起的炎性细胞因子表达、一氧化氮(NO)含量和炎性细胞侵润等现象。进一步利用转录组学测序分析PPRV感染PAM引起的差异基因、信号通路以及差异基因的表达情况。[结果]与正常山羊相比,感染PPRV的山羊其肝脏、肾脏及肺脏的部分细胞坏死并且呈现炎性细胞侵润的现象;与对照组相比,感染后的PAM细胞显著增加了NO含量(P<0.001);与未感染组相比,PPRV感染的PAM其炎性细胞因子IL-1β、TNF-α、IL-10等mRNA表达水平显著升高(P<0.05);此外,PPRV感染诱导的差异基因主要集中在炎症通路及NF-κB信号通路等。[结论]PPRV通过诱导大量炎性细胞侵润、增加炎性细胞因子表达,激活炎症信号通路从而产生炎症反应。