In Vitro Stimulation of Macrophages by Quadrol [N,N, N′, N′- Tetrakis (2-Hydroxypropyl) Ethylenediamine]

Abstract

Mouse peritoneal macrophages, when exposed to Quadrol [N,N,N′,N′-tetrakis (2-hydroxypropyl) ethylenediamine] in vitro, show a dose dependent enhanced spreading over a four-hour period. In vitro Quadrol induced phagocytosis of polystyrene beads was found to be time and concentration dependent. The rate and extent of the enhancement of phagocytosis was comparable to that observed for iipopolysaccharide and tuftsin.     

Prepandemic Influenza Vaccine H5N1 (Split Virion, Inactivated, Adjuvanted) [Prepandrix™]

Although rare, influenza pandemics are a recurrent event, and influenza A/H5N1 is generally considered to be the most likely causative agent of the next pandemic. Vaccines are widely considered to be the first line of defense for protecting populations in advance of an influenza pandemic. Because it is not known beforehand which strain of influenza A/H5N1 virus could give rise to a pandemic, prepandemic vaccines that impart broad cross-reactive immunogenicity are required. In addition, low doses of H5 hemagglutinin are preferable in order to make antigen supplies go further towards meeting global demands for prepandemic vaccines.Prepandemic influenza vaccine H5N1 [Prepandrix(trade mark); AS03-H5N1 vaccine] is a split virion, inactivated vaccine containing H5 hemagglutinin antigen adjuvanted with a novel 10% oil-in-water emulsion-based adjuvant system (AS03). It is approved in the EU for use as an active immunization against H5N1 subtype influenza A virus (influenza A/H5N1 virus) in adults aged 18-60 years. The recommended dosage in this population is two doses of 0.5 mL containing 3.75 microg of H5 hemagglutinin, administered >/=21 days apart. Adjuvantation of H5N1 vaccine with AS03 allows for a reduction in the H5 hemagglutinin dose required to elicit an adequate immune response, and administration of two doses of the adjuvanted vaccine met all criteria for the licensure of influenza vaccines set out in European Committee for Proprietary Medicinal Products (CPMP) and US FDA documents.In two clinical trials, two doses of AS03-H5N1 vaccine containing 3.75 microg of H5 hemagglutinin induced an immune response in healthy volunteers aged 18-60 years against the homologous, clade 1 vaccine strain, A/Vietnam/1194/2004, and the heterologous, drifted, clade 2 nonvaccine strains, A/Anhui/1/2005, A/Indonesia/5/2005, and A/turkey/Turkey/1/2005. This cross-clade response persisted for >/=6 months following administration of the first vaccine dose in the majority of vaccine recipients. In addition, AS03-H5N1 vaccine protected against lethal challenge with A/Vietnam/1194/2004 or A/Indonesia/5/2005 in animal studies. The vaccine was generally well tolerated and adverse events were transient and predominantly of mild to moderate severity.AS03-H5N1 vaccine has demonstrated antigen dose-sparing properties and cross-clade reactive immunity in clinical trials and challenge studies in animal models. As a result, stockpiling AS03-H5N1 vaccine has the potential to protect populations against a pandemic caused by an influenza A/H5N1 virus and may represent an important measure in pandemic preparedness.     

Thermo-Responsive Mn–Zn Ferrite/Poly(N,N′-Isopropyl Acrylamide-co-N-Hydroxymethylacrylamide) Core/Shell Nanocomposites for Drug-Delivery Systems

A kind of thermo-sensitive core/shell nanoparticles (Mn–Zn ferrite/poly(N,N′-isopropylacrylamide-co-N-hydroxymethylacrylamide)) has been designed in this work. By using the surface initiated method, a thermoresponsive co-polymer composed of N,N′-isopropylacrylamide (NIPAAm) and N-hydroxymethylacrylamide (HMAAm) was grafted from ferrite core. The nanoparticles obtained were characterized by FT-IR, XRD, TGA, HRTEM and DLS. The HRTEM observation showed a clear contrast between an ordered crystalline core and a light amorphous polymeric coating. DLS results confirmed the temperature sensitivity of the nanoparticles. In vitro hyperthermia showed well-controlled self-heating properties, indicating that the nanoparticles could potentially be used as an anticancer drug carrier in the biomedical field.     

46,XX,del(8) (p21)一家系两例

患者 女，结婚9年，怀孕4次。第1胎孕60多天自然流产；第2胎足月产一女，因患先天性心脏病在6岁时死亡（未做染色体检查）；第3、4胎均在孕80多天流产，经B超提示，胎儿只有30多天大小，且无胎心。查体：身高159cm,体重51kg，表型和智力无明显异常，无化学药物及射线接触史，无病毒感染史近亲婚配。患者父母非近亲婚配。患者母亲孕5次，流产3次。患者还有一妹妹。     

中西文N 400的研究现状简述(2)

目前心理语言学的研究侧重于语言理解而不是语言表达。语言理解可分为两大类：词语水平认知加工过程及词语后水平加工过程。N400波具体反映哪一个加工过程，至今仍有争论，一些学者认为N400反映词语水平加工过程(Kutas，1989)，其波幅反映了一个词刺激引起相应的脑细胞兴奋量的多     

中西文N400的研究现状简述(1)

1980年美国学者Kutas和Sillyard首先报道在一项语句阅读任务中可由语义不匹配的结尾词引出一个负性电位，因其潜伏期在400ms左右，遂称之为N400。N400是事件相关电位(ERP)的内源性成份之一，可通过各种语言操作任务诱发，主要反映语言认知的过程。Friederici等(1997)研究表明，     

46,XY,del(4)和46,XX,del(5)部分单体综合征二例

例1 因出生时发现多发畸形人院，患儿系足月剖腹产，体重2.36kg。查体：头顶部可见两皮肤缺损，双眼结膜充血，鼻梁塌陷，阴茎发育差，尿道下裂于阴茎腹侧，阴囊发育差。外周血细胞遗传学检查,其染色体核型：46，XY，del(4)(p14)。     

46,XY,t(5;21)及46,XX,t(1;10)二例

４６，ＸＹ，ｔ（５；２１）及４６，ＸＸ，ｔ（１；１０）二例段玲马明生胡泊例１男，３１岁，汉族，结婚７年。因婚后妻分娩新生儿畸形死亡两次，来院就诊。夫妇表型，智力正常，非近亲婚配，妻孕期无不良因素接触史，患者外生殖器发育良好，精液检查Ⅱ级，其妻染色体核...     

45,X/46,XX,der(11)t(X;11)嵌合体一例

患者　女,13岁,因身材矮小来我院儿童保健门诊就诊。患者系第3胎第1产,孕44周顺产。查体:身高115cm,身材匀称,无颈蹼,第二性征未发育,无月经初潮,乳房未发育,智力正常。B超:子宫轮廓清晰,边缘规整,约16mm×13mm,实质回声分布均匀,双侧附件显示不清,双侧卵巢未探及,子宫声像为基始子宫。X线照片:双胫骨近端内侧骨软骨瘤。父母非近亲婚配,表型正常,母孕期正常,无有害物质接触史。患者之妹,现已7岁,发育正常。细胞遗传学检查:外周血淋巴细胞培养,常规制备染色体,G带核型分析,计数50个中期分裂相,分析10个核型,确认核型为45,X/46,XX,der(11)t…     

Maleimide Functionalized Poly(ε-caprolactone)-b-poly(ethylene glycol) (PCL-PEG-MAL): Synthesis, Nanoparticle Formation, and Thiol Conjugation

Carboxylic acid terminated poly(ε-caprolactone)s (PCL-COOHs) with narrow polydispersity were synthesized and coupled with poly(ethylene glycol) (HO-PEG-OH) to afford PCL-PEG-OH copolymers. The hydroxyl groups in the PCL-PEG-OHs were then converted to maleimide groups to afford maleimide terminated PCL-PEG-MALs that contained 70-90% maleimide functionality. Nanoparticles with maleimide functionality on their surfaces were prepared by impingement mixing. Particle sizes and size distributions were determined by dynamic light scattering. Conjugation of reduced glutathione with model maleimides and two MAL-functional nanoparticles was also demonstrated. The amount of accessible maleimide on the particle surface was measured using Ellman's reagent to range between ~51-67%.     

抗SARS-CoV病毒N蛋白的单链抗体(scFv)筛选

目的筛选出抗SARS-CoV病毒N蛋白的单链抗体。方法利用原核表达所获得的SARS病毒N蛋白,筛选人源单链抗体噬菌体展示库,经特异性的检测,以期得到抗SARS-CoV病毒N蛋白的特异单链抗体。结果获得了8个抗SARS病毒N蛋白的候选克隆。经测序,获得了编码抗体可变区的基因序列,并进行了原核表达。结论筛选得到的抗SARS-CoV病毒N蛋白单链抗体具有高度的特异性,可以用作临床实验或研究SARS病毒过程中快速检测SARSN蛋白或SARS病毒粒子的候选抗体。     

Diplostomum (Austrodiplostomum) compactum (Lutz, 1928) (Platyhelminthes, Digenea) metacercariae in fish from the floodplain of the Upper Paraná River, Brazil

Diplostomum (Austrodiplostomum) compactum (Lutz, 1928) metacercariae (Platyhelminthes, Digenea) were found in six fish species, belonging to two orders (Characiformes and Perciformes) and three families (Erythrinidae, Sciaenidae and Cichlidae). A total of 477 individuals were collected, from August 1999 to May 2001, in the upper Paraná River floodplain, Brazil. The metacercariae were infecting the eyes of six host species and the brain of five of them. Plagioscion squamosissimus, Satanoperca pappaterra and Cichla monoculus presented the highest values of prevalence, mean intensity and mean abundance. Diplostomum (A.) compactum was overdispersed in the population of Hoplias aff. malabaricus, S. pappaterra, P. squamosissimus, Crenicichla britskii and C. monoculus. No significant difference was observed in the metacercariae distribution in the right and left eyes. The abundance of D. (A.) compactum metacercariae was positively correlated with the hosts relative condition factor in H. aff. malabaricus and S. pappaterra. No significant difference of the abundance of parasitism between the sex of the hosts was evidenced. In relation to the prevalence, significant difference was observed only in C. britskii. Positive correlations were verified between the prevalence of infection and the standard length of the specimens in C. britskii and the intensity of infection and the standard length of the hosts in P. squamosissimus and C. monoculus. In relation to parasite abundance and the standard length class of the host, significant differences were observed in P. squamosissimus, C. britskii and C. monoculus.     

多发性骨髓瘤(Multiple Myeloma,MM)

病例1女,37岁（住院1994年3月29日至4月16日）腰及左下肢放射疼痛半年．29／3X线腰椎片L4－5椎间盘脱出,拟手术治疗入院．5／4椎间盘CTLi～S1骨质破坏,考虑多发性骨髓瘤或血液系统病变所致．11／4头颅正侧位＋胸肋骨＋骨盆正侧位片转移性肿瘤与骨髓润相鉴别,两侧后助（3～9）均见骨质密度减低,内中见小圆点状骨质破坏．11／4ECT右侧骨盆,右髋关节股骨头、右侧前助等处骨质代谢异常活跃,考虑骨质破坏,未排除早期骨髓瘤改变．12／4骨髓片稀释,有核细胞增生极度减少,血片可见晚幼粒及脱幼红细胞．RBC2．50×1012／L,Hb84g／L…     

46,XX,18(r)综合征1例

病例　患者，女，４天，患母因第四胎第一产，羊水少，此胎为珍贵儿于３７＋４周进行剖腹产。分娩评分９分，待口咽部吸出０－５ｍｌ及胃内吸出３ｍｌ羊水５分钟后复评分１０分。分娩６小时后出现吸入性肺炎系列症状，呼吸粗，面色苍白，皮肤青紫。四肢肌张力偏低，两下肢和足背有轻度水肿。面容特殊，前囟小，头围３１ｃｍ，小于正常头围两个标准差。吞咽欠佳。患儿核型为４６，ＸＸ，１８（ｒ）。父母核型均正常，非近亲结婚。无遗传病家族史。讨论　１８号染色体易位常见，而环状较少见，此病遗传性为源自新的突变。患儿母前３胎均为难免…     

5-X综合征(49,XXXXX)

5-X综合征,是Kesaree和Woolley(1963)首先报告的一种罕见的染色体综合征,此后,有若干病例报告。在临床上,病人表现与X三体和4X染色体有较大的不同,通常很像先天愚型并表现出一些Tur-ner氏综合征的常见特点。在缺乏准确研究方法时,这些病人可能被误诊。此文报告一个5-X综合征病例的临床、细胞遗传学和尸解研究资料。病例报告:白人,第一胎,臀先露,足月剖腹产,体重2,450克。母亲怀孕期正常,无X线接触史,母亲年龄为23岁,父亲     

禽流感病毒(H5N1型)血凝素(HA)T细胞抗原表位的预测

目的：应用免疫信息学的方法寻找不同来源的H5NI型禽流感病毒血凝素（HA）的共同抗原决定簇，为发展H5NI型禽流感病毒的表位疫苗打基础。方法：从GeneBank下载不同来源的H5NI型禽流感病毒血凝素（HA）的氨基酸序列，先使用Clustal W1．83生物软件对这些氨基酸序列进行同源性比较，然后使用SYFPEITHI生物学软件分析不同来源氨基酸序列的MHCI类分子提呈的抗原肽（抗原决定簇），最后寻找共同的、且和MHCI类分子结合比较强的抗原肽。结果：不同来源的氨基酸序列同源性虽然不尽相同，但是，他们之间也有一些相同的、并且和MHCI类分子结合比较强的抗原肽。结论：利用这些相同的、并且和MHCI类分子结合比较强的抗原肽有可能发展H5NI型禽流感病毒表位疫苗，用来预防H5NI型禽流感。     

小鼠BPI N端功能片段(muBPI_(25)蛋白)体外杀菌和中和内毒素作用研究

目的:建立胞内杀菌和体外中和内毒素实验模型,检测muBPI25目的蛋白对胞内寄生菌的抑杀作用和对内毒素的中和作用。方法:将pcDNA3.1(+)-muBPI36-259质粒导入RAW264.7细胞,用胞内寄生G+/G-菌感染上述细胞建立muBPI25目的蛋白胞内杀菌实验模型;将pSecTag2B-muBPI36-259与双荧光素酶报告基因质粒共转染RAW264.7细胞,建立体外检测muBPI25蛋白中和内毒素实验模型。结果:胞内杀菌实验模型证实muBPI25目的蛋白对G-伤寒杆菌具有抑杀作用;中和内毒素实验模型证实muBPI25目的蛋白对内毒素具有中和作用。结论:首次证实小鼠BPI N端功能片段,即muBPI25目的蛋白对G-菌具有抑杀作用,对其裂解产物内毒素具有中和作用。