C3b inactivator deficiency: Association with an alpha-migrating factor H

Complete absence of Factor I (C3b inactivator) was found in the serum of a 3-year-old boy with recurrent polytope bacterial infections. Analysis of the complement (C) components of the patient's serum showed that while serum levels of the earlier C components (C1q, C1r, C1s, C4, and C2) were within the normal range, levels of C3, C5, Factor B, and properdin were decreased significantly. Factor H (₁H) was also decreased and, by crossed immunoelectrophoresis, migrated to the alpha region (H). C-dependent biological functions such as chemotactic activity, opsonic factors, immune adherence inhibition, and intracellular killing of bacteria were defective. The patient has been treated with fresh frozen plasma (10 ml/kg body weight) every 4 weeks for 2 years. Most of the C-derived biological functions improved, and Factor H regained beta electrophoretic mobility (H) following plasma infusion. During the period of treatment, the child has been free of bacterial infections. Mild anaphylactic reactions to the plasma occurrred on two occasions; the other 22 infusions were well tolerated.     

精卵孵育时间与活性氧的关系以及对体外受精结局的影响

目的检测长、短时受精受精液中活性氧的不同,分析精卵孵育不同时间对体外受精-胚胎移植结局的影响。方法155例接受常规IVF受精的患者,每人取出的OCCC随机分为两组：A组为短时受精,B组为长时受精。检测受精液中H202、CTA的含量。移植的119名患者随机分为两组,一组60人移植短时受精的胚胎,一组59人移植长时受精的胚胎。结果B组的受精液中H202水平明显高于A组（P〈0．05）,CTA水平明显低于A组（P〈0．05）。B组的多精受精率明显高于A组（P〈0．05）,A组的优胚率明显高于B组（P〈0．05）,两组间的受精率、卵裂率、植入率、临床妊娠率无统计学差异。结论长时受精时,过量的活性氧对卵子及胚胎有不利影响。短时受精在不影响受精率的前提下,可以降低多精受精率,提高优胚率。     

Novel function of histamine signaling in hyperlipidemia‐induced atherosclerosis: Histamine H1 receptors protect and H2 receptors accelerate atherosclerosis

Histamine is not only essential for acute inflammatory reactions, but it also participates in a chronic inflammatory disorder. We generated apolipoprotein E (apoE) and histamine receptors (HHRs), including the major H1 and H2 receptors (HH1R, HH2R) double knockout mice (DKO) to clarify the role of HHRs in hyperlipidemia‐induced atherosclerosis, in which apoE‐KO and DKO mice were fed a high cholesterol diet. We found that pronounced hyperlipidemia‐induced atherosclerotic progression occurred in HH1R/apoE‐DKO mice, but in HH2R/apoE‐DKO mice less atherosclerosis, despite pro‐atherogenic serum cholesterol levels compared with apoE‐KO mice. Furthermore, the increased expressions of scavenger receptors (SRs), such as SR‐A, CD36 and lectin‐like oxidized low‐density lipoprotein receptor 1 (LOX‐1), nuclear factor‐kappa B (NFκB), monocyte chemoattractant protein (MCP‐1), matrix metalloproteinases (MMPs) or liver X receptor (LXR)‐related inflammatory signaling factors, were consistent with the pro‐atherogenic phenotype of HH2R/apoE‐DKO mice. We hypothesize that histamine/HH1R and HH2R signaling has conflicting innate functions, inflammatory/atherogenic and anti‐inflammatory/anti‐atherogenic actions, and that there are innate links between histamine signaling and hyperlipidemia‐induced atherosclerosis, independently of serum cholesterol metabolism. Specific histamine signaling blockers, in particular, HH2R blockers, are a possible novel therapeutic target for hyperlipidemia‐induced atherosclerosis.     

HGF/c-Met信号通路在克唑替尼诱导不同肺癌细胞株凋亡中的作用

 目的: 观察克唑替尼(crizotinib)诱导不同肺癌细胞株凋亡中HGF/c-Met信号通路的变化并探讨其调控机制。方法: 采用噻唑蓝(MTT)法检测克唑替尼对H1993(c-Met扩增的肺腺癌细胞)、H2228(含有EML4-ALK融合基因的肺癌细胞)和A549细胞的活力抑制情况;采用流式细胞术检测3种细胞在克唑替尼作用后24 h、48 h和72 h的凋亡率;采用Western blot检测细胞在克唑替尼作用前后HGF/c-Met信号通路中MET蛋白及其磷酸化形式p-MET的水平,同时观察其下游通路关键蛋白AKT、ERK、p-AKT和p-ERK的变化情况。结果: MTT结果表明克唑替尼作用72 h后,H1993、H2228和A549细胞株的细胞活力抑制率均呈剂量依赖性升高。流式细胞术检测发现随着克唑替尼作用时间的延长,细胞凋亡率呈时间依赖性增加(P<0.05)。Western blot检测结果提示在H1993细胞株和H2228细胞株中,p-MET、p-AKT和p-ERK随着时间的延长蛋白水平呈现下降趋势。而在A549细胞株中p-AKT、p-ERK和p-MET在药物作用72 h后的变化趋势不明显。结论: 初步证实HGF/c-Met信号通路与克唑替尼诱导肺癌细胞株H1993和H2228凋亡相关。     

利用反向遗传学技术构建H5N9重组流感病毒株

目的 利用反向遗传学技术构建来源人感染禽流感病毒H5N1和H7N9 HA和NA基因的H5N9亚型禽流感病毒.方法 全基因合成A/Beijing/01/2003(H5N1)禽流感病毒HA基因片段和A/Zhejiang/DTID-ZJU10/2013(H7N9)禽流感病毒NA基因片段,插入到pHW2000载体,与携带有A/Puerto Rico/8/34(H1N1)的6个内部基因的pHW2000重组质粒一起转染293T和MDCK混合细胞,拯救H5N9重组病毒.结果 核酸测序、HA和NA基因转录和表达检测、细胞病变分析确定利用该反向遗传学系统可以成功拯救H5N9病毒.重组H5N9病毒在MDCK细胞上复制增殖能力低于相同方法拯救H1N1病毒.结论 利用反向遗传学技术成功构建一株H5N9重组病毒.     

2011-2017年河北省甲型H1N1流感流行特征分析

目的掌握河北省甲型H1N1流感的流行特征,为流感防控提供科学依据.方法通过中国流感监测信息系统收集河北省2011年4月至2017年3月流感及流感样病例(influenza-likeillness,ILI)监测数据进行统计分析.结果共检测ILI标本77 008份,甲型H1N1流感病毒核酸阳性2 699份,阳性率3.50％.对2 699例甲型H1N1流感病例进一步分析显示:全省11个地市均有该病例检出,男女比例为1.09:1,各年龄组均可发病,检出率最高的是25～59岁组,最低0～4岁组.2011年11月至2017年3月共出现4次流行,具有明显的季节性,且呈单峰性.各年度均有甲型H1N1流感病例检出,甲型H1N1流感分别是2012-2013、2013-2014和2016-2017年度的优势病原.结论河北省甲型N1N1流感流行具有明显的季节性,冬春季流行,近年来感染以5～14岁年龄组为主.     

垂直骨型对Ⅱ1类错(牙合)患者面下1/3软组织结构影响的研究

目的:研究不同垂直骨面型的成人Ⅱ1类错患者面下1/3软组织结构的差异.方法:选取未经正畸治疗的180例成人Ⅱ1类错患者分为高角(SN-MP角＞40°)、均角(29°≤SN-MP角≤40°)、低角(SN-MP角＜29°)3组.每组各有男、女30人.在头颅侧位定位片上分别测量上唇、下唇、颏部软组织结构的厚度与长度,并分析其在不同垂直骨面型个体间的差异.结果:男、女高角型Ⅱ1类错患者上唇长度、下唇长度都较均角和低角患者明显增高(P＜0.05);男性高角型Ⅱ1类错(牙合)患者下唇基部厚度也较均角和低角患者明显增高(P＜0.05),而女性低角角型Ⅱ1类错患者下唇基部厚度较均角和高角患者明显减低(P＜0.05).女性高角组患者的颏顶点处软组织厚度明显低于均角组和低角组患者(P＜0.05),而男性不同垂直骨面型Ⅱ1类错患者颏部软组织结构则未见明显的差异(P＞0.05).结论:垂直向骨型因素对Ⅱ1类患者面下1/3软组织以厚度和长度为代表的结构有明显的影响.     

中国内地首例甲型H1N1流感患者115例密切接触者医学观察分析

目的：通过对首例甲型H1N1流感密切接触者临床医学观察发现二代患者,为大规模临床医学观察积累经验和参考。方法：对首例甲型H1N1流感患者密切接触者115例的临床医学观察资料进行回顾性分析。结果：115例密切接触者中,有6人出现不同程度咽充血、咽部疼痛症状,其中1例为糖尿病患者、2例为高血压患者;1例左前臂疱疹,1例口腔溃疡,4例结膜充血;观察第3天1例出现精神抑郁,1例出现情绪激动;观察第4天2例多次要求提前解除隔离,多例关心何时解除隔离。七日医学观察期间115例密切接触者均无咽痛、咳嗽、鼻塞等症状,体温均正常,情绪稳定,未发现二代患者。结论：对甲型H1N1流感患者的密切接触者进行临床医学观察是必要的,有助于发现二代患者,疾控中心（CDC）采样与临床医学观察和心理干预的有效结合,给传染病医学观察提供宝贵的经验和有效的工作模式。     

基因nm23-H1和TGVβ1在人体食管癌中的表达及其临床病理关系的意义

目的探讨转移抑制基因nm23-H1及转化生长因子β1（TGFβ1）基因在人食管癌（EC）中的表达水平及其临床病理关系。方法应用免疫组化方法对56例人食管癌组织中转移抑制基因nm23～H1及TGFβ1基因表达蛋白水平进行研究。结果nm23-H1和TGFβ1表达水平与食管的TNM分期、细胞分化程度及食管癌的转移有密切关系（P〈0．05）。结论nm23-H1、TGFβ1基因表达水平同时降低，预示食管癌的转移和预后不良。