African swine fever virus(ASFV)is a lethal pathogen that causes severe threats to the global swine industry and it has already had catastrophic socio-economic effects.To date,no licensed prophylactic vaccine exists.Li...African swine fever virus(ASFV)is a lethal pathogen that causes severe threats to the global swine industry and it has already had catastrophic socio-economic effects.To date,no licensed prophylactic vaccine exists.Limited knowledge exists about the major immunogens of ASFV and the epitope mapping of the key antigens.As such,there is a considerable requirement to understand the functional monoclonal antibodies(mAbs)and the epitope mapping may be of utmost importance in our understanding of immune responses and designing improved vaccines,therapeutics,and diagnostics.In this study,we generated an ASFV antibody phage-display library from ASFV convalescent swine PBMCs,further screened a specific ASFV major capsid protein(p72)single-chain antibody and fused with an IgG Fc fragment(scFv-83-Fc),which is a specific recognition antibody against ASFV Pig/HLJ/2018 strain.Using the scFv-83-Fc mAb,we selected a conserved epitope peptide(221MTGYKH226)of p72 retrieved from a phage-displayed random peptide library.Moreover,flow cytometry and cell uptake experiments demonstrated that the epitope peptide can significantly promote BMDCs maturation in vitro and could be effectively uptaken by DCs,which indicated its potential application in vaccine and diagnostic reagent development.Overall,this study provided a valuable platform for identifying targets for ASFV vaccine development,as well as to facilitate the optimization design of subunit vaccine and diagnostic reagents.展开更多
目的调查并分析江苏省极低/超低出生体重儿抗生素使用现状,为促进新生儿重症监护室(neonatal intensive care unit,NICU)抗生素管理质量及改进提供临床依据。方法回顾性分析2019年1月1日至2020年12月31日江苏省15家医院收治的极低/超低...目的调查并分析江苏省极低/超低出生体重儿抗生素使用现状,为促进新生儿重症监护室(neonatal intensive care unit,NICU)抗生素管理质量及改进提供临床依据。方法回顾性分析2019年1月1日至2020年12月31日江苏省15家医院收治的极低/超低出生体重儿的一般情况及抗生素使用情况的相关资料,并设计减少抗生素使用措施的10项调查问卷表,通过问卷调查了解干预措施的实施情况。结果共纳入1920例极低/超低出生体重儿,其中1846例(96.15%)使用抗生素,抗生素使用率(antibiotic use rate,AUR)中位数为50/100住院日。15家医院AUR为24~100/100住院日。采用Poisson回归,调整胎龄、出生体重、新生儿危重评分混杂因素后,各医院间调整后抗生素使用率(adjusted antibiotic use rate,aAUR)差异有统计学意义(P<0.01)。调查结果显示,10项减少抗生素使用的措施中,8项措施开展的医院不足一半;干预措施实施项目数与aAUR呈负相关(r_(s)=-0.564,P=0.029)。结论江苏省15家医院极低/超低出生体重儿AUR高,且医院之间差异大;实施减少抗生素使用措施少的医院AUR高,促进NICU抗生素使用管理的质量改进,有望减少极低/超低出生体重儿的AUR。展开更多
基金supported by the National Natural Science Foundation of China(31941001 and 32002292)the Major Science and Technology Project of Henan Province,China(221100110600)the Natural Science Foundation of Henan Province(202300410199).
文摘African swine fever virus(ASFV)is a lethal pathogen that causes severe threats to the global swine industry and it has already had catastrophic socio-economic effects.To date,no licensed prophylactic vaccine exists.Limited knowledge exists about the major immunogens of ASFV and the epitope mapping of the key antigens.As such,there is a considerable requirement to understand the functional monoclonal antibodies(mAbs)and the epitope mapping may be of utmost importance in our understanding of immune responses and designing improved vaccines,therapeutics,and diagnostics.In this study,we generated an ASFV antibody phage-display library from ASFV convalescent swine PBMCs,further screened a specific ASFV major capsid protein(p72)single-chain antibody and fused with an IgG Fc fragment(scFv-83-Fc),which is a specific recognition antibody against ASFV Pig/HLJ/2018 strain.Using the scFv-83-Fc mAb,we selected a conserved epitope peptide(221MTGYKH226)of p72 retrieved from a phage-displayed random peptide library.Moreover,flow cytometry and cell uptake experiments demonstrated that the epitope peptide can significantly promote BMDCs maturation in vitro and could be effectively uptaken by DCs,which indicated its potential application in vaccine and diagnostic reagent development.Overall,this study provided a valuable platform for identifying targets for ASFV vaccine development,as well as to facilitate the optimization design of subunit vaccine and diagnostic reagents.
文摘目的调查并分析江苏省极低/超低出生体重儿抗生素使用现状,为促进新生儿重症监护室(neonatal intensive care unit,NICU)抗生素管理质量及改进提供临床依据。方法回顾性分析2019年1月1日至2020年12月31日江苏省15家医院收治的极低/超低出生体重儿的一般情况及抗生素使用情况的相关资料,并设计减少抗生素使用措施的10项调查问卷表,通过问卷调查了解干预措施的实施情况。结果共纳入1920例极低/超低出生体重儿,其中1846例(96.15%)使用抗生素,抗生素使用率(antibiotic use rate,AUR)中位数为50/100住院日。15家医院AUR为24~100/100住院日。采用Poisson回归,调整胎龄、出生体重、新生儿危重评分混杂因素后,各医院间调整后抗生素使用率(adjusted antibiotic use rate,aAUR)差异有统计学意义(P<0.01)。调查结果显示,10项减少抗生素使用的措施中,8项措施开展的医院不足一半;干预措施实施项目数与aAUR呈负相关(r_(s)=-0.564,P=0.029)。结论江苏省15家医院极低/超低出生体重儿AUR高,且医院之间差异大;实施减少抗生素使用措施少的医院AUR高,促进NICU抗生素使用管理的质量改进,有望减少极低/超低出生体重儿的AUR。
