Evaluation of the Immunogenicity in Mice Orally Immunized with Recombinant Lactobacillus casei Expressing Porcine Epidemic Diarrhea Virus S1 Protein

Porcine epidemic diarrhea (PED), characterized by diarrhea, vomiting, and dehydration, is an acute enteric infectious disease of pigs. The disease is caused by porcine epidemic diarrhea virus (PEDV), which infects the intestinal mucosal surface. Therefore, mucosal immunization through the oral route is an effective method of immunization. Lactic acid bacteria, which are acid resistant and bile-salt resistant and improve mucosal immunity, are ideal carriers for oral vaccines. The S1 glycoprotein of PEDV mediates binding of the virus with cell receptors and induces neutralizing antibodies against the virus. Therefore, we reversely screened the recombinant strain pPG-SD-S1/Δupp ATCC 393 expressing PEDV S1 glycoprotein by Lactobacillus casei deficient in upp genotype (Δupp ATCC 393). Mice were orally immunized three times with the recombinant bacteria that had been identified for expression, and the changes of anti-PEDV IgG and secreted immunoglobulin A levels were observed over 70 days. The results indicated that the antibody levels notably increased after oral administration of recombinant bacteria. The detection of extracellular cytokines on the 42nd day after immunization indicated high levels of humoral and cellular immune responses in mice. The above results demonstrate that pPG-SD-S1/Δupp ATCC 393 has great potential as an oral vaccine against PEDV.     

中美婴儿运动表现测试常模差异分析

目的比较中美婴儿运动表现测试(TIMP)常模,明确本地化研究和修正的重要性,为指导TIMP在国内的推广提供依据。方法经TIMP手册正反译,评估人员培训、信度考核后,分别在华东、华北、华南、华中、西南、西北、东北区域11家医疗机构采样,建立中国TIMP常模,并就样本情况、得分情况及亚组分类与美国常模进行对比。结果中国TIMP常模共13个周龄组,样本总数为1 035例,其中男性占56%,女性占44%,汉族占比95%,少数民族5%,早产儿和足月儿分别占比31%、69%;美国常模共12个周龄组,样本总数为990例,其中男性占52%,女性48%,白种人占58%,黑种人25%,高危、中危、低危婴儿分别占比35%、30%、35%。中国TIMP常模各周龄组得分均值低于同周龄组的美国常模(P<0.01);中国常模第10、50、90百分位数曲线低于美国常模。中国常模足月儿与早产儿亚组对比,大多数周龄组得分无显著差异;美国常模中高危儿亚组得分显著低于低危组(P<0.001)。结论基于两国人口特征和儿童保健发展现状的不同,中美TIMP常模取样人群存在差异。中国常模各周龄组的得分均值低于美国常模同周...     

2008—2020年江苏省淮安市围产儿出生缺陷变化趋势及影响因素分析

目的：分析2008—2020年淮安市围产儿出生缺陷的发生情况、变化趋势及其影响因素。方法：数据来源于江苏省淮安市妇幼卫生信息系统中2008—2020年的监测数据以及淮安市统计年鉴。以年度变化百分比和平均年度变化百分比（AAPC）为主要指标，采用JoinPoint回归描述十三年间淮安市出生缺陷发生的变化趋势。采用Spearman相关性分析探讨出生缺陷发生率与人口出生率、结婚登记率及高龄产妇分娩占比的相关性。结果：2008—2020年，淮安市共发生围产儿出生缺陷3414例，出生缺陷发生率为4.6‰（3414/736 608），且表现为明显的上升趋势（AAPC=8.8%， t=3.2， P<0.01），2016年为变化转折点。在24类出生缺陷中，先天性心脏病发病率急剧上升，已成为顺位第一疾病，而无脑畸形、脑膨出、脊柱裂等神经管缺陷发病率下降明显。出生缺陷率与人口出生率呈负相关（ r=–0.751， P<0.01），与结婚登记率无明显相关性（ r=–0.516， P>0.05），与高龄产妇分娩占比呈正相关（ r=0.726， P<0.01）。 结论：2008—2020年，淮安市出生缺陷发生率整体呈上升趋势，先天性心脏病已成为第一顺位的出生缺陷，高龄产妇分娩占比与出生缺陷之间关系密切。     

依据HL7标准建立服务型国际旅行卫生保健信息化平台的构想

背景 由于缺乏统一的医疗信息交换标准,医疗机构内部和各医疗机构之间信息交流受阻;目前国际旅行卫生保健中心广泛采用的单机或局域网非标准化格式有碍于行业间的信息交流.方法 依据HL7标准建立服务型国际旅行保健信息化平台.结果 促使保健中心内部及其与相关机构间的信息交流简便畅通.     

Early Age Shrinkage and Mechanical Effect of Ultra-High-Performance Concrete Composite Deck: A Case Study with In Situ Test and Numerical Simulation

For the Honghe Bridge project located in Yunnan Province, Southwest China, a steel/ultrahigh-performance concrete (UHPC) composite deck is used in the suspension bridge with a 700 m main span, and the steel stud connectors are used in the 50 mm–thick UHPC layer. To investigate the shrinkage behavior of UHPC and the relevant influence, the in situ time-dependent strain is measured continuously, and within the 20-day curing time, the material behavior is summarized based on test results. This paper proposes a prediction model for UHPC shrinkage which is refined from the widely used B3 model for normal concrete material, and the parameter values are modified and optimized by experimental comparison. Combining the numerical model and the finite element analysis model of the composite deck, the detailed mechanical state in structural parts is studied. For the practical construction, the simulation results indicate that the small thickness of UHPC above the stud and weak bond strength can influence the eventual structural performance greatly. In the discussion of stress distribution at different locations of the deck, the potential crack on the edge and the corner of the UHPC–steel interface and the mechanical damage on the stud connector around are also indicated.     

鸦胆子茎节组培快繁体系的建立

目的：建立鸦胆子茎节组培快繁体系。方法：选用鸦胆子嫩枝为外植体,探讨基本培养基和外源激素对其离体再生的初代培养、继代增殖、生根培养的影响,并进行移栽试验。结果：鸦胆子的不定芽增殖、壮苗、生根的最佳培养基分别为MS＋6-BA1．0mg·L^-1＋IBA0.1mg·L^-1,1／2MS＋香蕉汁20g·L^-1;1／2NS＋IBA0．1mg·L^-1＋NAA0．1mg·L^-1。炼苗基质为细沙时,成活率最高。     

圆叶牵牛毛状根的诱导及培养

目的：利用发根农杆菌,R1601,1000,1025,15834诱导约用植物圆叶牵牛产生毛状根。方法：采用共培养方法,通过对外植体、菌种、浸染时间、预培养、共培养、外源激素等因素对转化率的影响。结果：利川发根农杆菌1601,预培养60h的叶片、叶柄为转化材料,感染6～8min,加入1mg·L^-1 NAA转化率最高。结论：圆叶牵牛毛状根的诱导成功,为其遗传转化提供了依据。     

子宫内膜异位症与抗碳酸酐酶抗体的关系

目的 :探讨抗碳酸酐酶Ⅰ、Ⅱ抗体与子宫内膜异位症的关系。方法 :应用酶联免疫吸附 (ELISA)法分别检测内异症 32例、其他妇科疾病 (妇科组 ) 2 0例及正常妇女 12例血清抗碳酸酐酶抗体水平。结果 :(1)内异症患者血清抗碳酸酐酶Ⅰ、Ⅱ抗体阳性率(87.5 %、5 3.1% )高于妇科组 (2 5 %、15 % ) ,两组差异有显著性 (P <0 .0 1) ;(2 )内异症患者血清抗碳酸酐酶Ⅰ、Ⅱ抗体阳性率明显高于正常妇女组 (0 %、0 % ) ,两组差异有显著性 (P<0 .0 1) ;(3)妇科组及正常妇女组血清抗碳酸酐酶Ⅰ、Ⅱ抗体阳性率较低 ,两组差异无显著性 (P >0 .0 5 )。结论 :检测抗碳酸酐酶抗体对诊断子宫内膜异位症及探讨其发病机制有重要价值     

骨髓增生异常综合征治疗新药开发

骨髓增生异常综合征(MDS)是克隆性造血干细胞疾病,临床表现呈现多样性和异质性,以血细胞减少为特征,少数有进展为急性白血病的危险。近十年出现了多种新的治疗方案,本文综述近年上市的以及目前处于临床研究阶段的治疗MDS的新药开发进展。