Neuropeptide S(NPS)is involved in severe pathological processes.Direct evidence showed NPS regulates the secretion of proinflammatory cytokines in pigs.This study investigated the effect of NPS on the secretion of inf...Neuropeptide S(NPS)is involved in severe pathological processes.Direct evidence showed NPS regulates the secretion of proinflammatory cytokines in pigs.This study investigated the effect of NPS on the secretion of inflammatory cytokines in ducks with H9N2 infection via intramuscular injection with NPS or NPS receptor(NPSR)antagonist.The ducks received 15 nM NPS or 10 nM NPSR antagonist in saline.Samples were collected to analyze the expression levels of IL-1β,IL-6,TNF-α,IFN-α,NPS,and the H9N2 gene NP by RT-PCR and real time RT-PCR;samples were fixed to observe the histopathological changes by hematoxylin-eosin staining.Serial blood samples were collected(every 30 min,starting 1 h before injections and lasting until 2 h after injections)to measure the serum levels of IL-1β,IL-6,TNF-α,and IFN-αby ELISA.Semiquantitative RT-PCR confirmed that the expression of NPS mRNA was increased in H9N2 infection group.Morphological data showed NPS treatment could reverse the pathological changes in the duck bursa induced by H9N2 infection.Both the results of real time quantitative RT-PCR and ELISA methods showed NPS and NPSR antagonist treatments could significantly regulate the expression of IFN-α,but not of IL-1β,IL-6 and TNF-α;meanwhile,the levels of increased IFN-α and decreased NP were further prompted by NPS,and NPSR antagonist revered.Conclusion,NPS is involved in the innate immunity response to H9N2 infection via the IFN-αpathway in ducks in vivo.These results indicate NPS affects the immune homeostasis and provides an alternative for anti-H9N2 drugs.展开更多
Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selectio...Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selection work. In this work, the interrelation among various qualitative characteristics of eggs of Shanxing egg ducks breed, their variability and an individual assessment of ducks-mothers was considered. Prospects of carrying out selection on increase of yolk ratio in egg were estimated.展开更多
应用PCR技术对在鸭粪中发现的疑似环孢子虫的18 S rDNA部分基因和ITS-1+基因进行了扩增,将扩增出的片段纯化后连接至pMD-18T载体上,选取阳性克隆进行序列测定,并利用NCBI在线BLAST程序和MEGA 4软件对测序结果进行了同源性比较和系统发...应用PCR技术对在鸭粪中发现的疑似环孢子虫的18 S rDNA部分基因和ITS-1+基因进行了扩增,将扩增出的片段纯化后连接至pMD-18T载体上,选取阳性克隆进行序列测定,并利用NCBI在线BLAST程序和MEGA 4软件对测序结果进行了同源性比较和系统发育树构建。结果显示,测得的18 SrDNA序列与环孢子虫的相似性最高(98%),且在系统树中位于同一分支上;测得的ITS-1序列高度特异,在GenBank中未发现同源性序列,可以确定其为环孢子虫的一个新种,暂命名为鸭源环孢子虫。展开更多
基金Supported by National Nature Science Foundation of China(31302050)Fujian Provincial Key Lab-oratory of Livestock Infectious Disease for Prevention and Biotechnology at Longyan University(2018KF03)Fujian Agriculture and Forestry University Teaching Reform Project(111418106)&Fujian Agriculture and Forestry University College Students’ Innovation Project(201910389198)
文摘Neuropeptide S(NPS)is involved in severe pathological processes.Direct evidence showed NPS regulates the secretion of proinflammatory cytokines in pigs.This study investigated the effect of NPS on the secretion of inflammatory cytokines in ducks with H9N2 infection via intramuscular injection with NPS or NPS receptor(NPSR)antagonist.The ducks received 15 nM NPS or 10 nM NPSR antagonist in saline.Samples were collected to analyze the expression levels of IL-1β,IL-6,TNF-α,IFN-α,NPS,and the H9N2 gene NP by RT-PCR and real time RT-PCR;samples were fixed to observe the histopathological changes by hematoxylin-eosin staining.Serial blood samples were collected(every 30 min,starting 1 h before injections and lasting until 2 h after injections)to measure the serum levels of IL-1β,IL-6,TNF-α,and IFN-αby ELISA.Semiquantitative RT-PCR confirmed that the expression of NPS mRNA was increased in H9N2 infection group.Morphological data showed NPS treatment could reverse the pathological changes in the duck bursa induced by H9N2 infection.Both the results of real time quantitative RT-PCR and ELISA methods showed NPS and NPSR antagonist treatments could significantly regulate the expression of IFN-α,but not of IL-1β,IL-6 and TNF-α;meanwhile,the levels of increased IFN-α and decreased NP were further prompted by NPS,and NPSR antagonist revered.Conclusion,NPS is involved in the innate immunity response to H9N2 infection via the IFN-αpathway in ducks in vivo.These results indicate NPS affects the immune homeostasis and provides an alternative for anti-H9N2 drugs.
基金Supported by the Earmarked Fund for National Waterfowl-industry Technology Research System(CARS-43-2)National Supporting Projects for Science and Techniques(2012BAD12B10)Special Project for International Science and Technology Cooperation(2013DFA31880)
文摘Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selection work. In this work, the interrelation among various qualitative characteristics of eggs of Shanxing egg ducks breed, their variability and an individual assessment of ducks-mothers was considered. Prospects of carrying out selection on increase of yolk ratio in egg were estimated.
文摘应用PCR技术对在鸭粪中发现的疑似环孢子虫的18 S rDNA部分基因和ITS-1+基因进行了扩增,将扩增出的片段纯化后连接至pMD-18T载体上,选取阳性克隆进行序列测定,并利用NCBI在线BLAST程序和MEGA 4软件对测序结果进行了同源性比较和系统发育树构建。结果显示,测得的18 SrDNA序列与环孢子虫的相似性最高(98%),且在系统树中位于同一分支上;测得的ITS-1序列高度特异,在GenBank中未发现同源性序列,可以确定其为环孢子虫的一个新种,暂命名为鸭源环孢子虫。
