n-HA/PA66复合生物活性融合器在颈椎病前路减压融合术中的初步应用研究

分析52例颈椎病行前路减压、n-HA/PA66复合生物活性融合器植骨、钛钉板系统内固定颈椎前路重建手术患者的临床资料,探讨自行研制的纳米羟基磷灰石/聚酰胺66(n-HA/PA66)复合生物活性融合器在颈椎病前路减压固定融合手术中的初步临床疗效。所有术后均获得6～25个月(平均13个月)的随访。患者术前症状均得到改善,JOA评分术前平均为10.4分,术后为15.7分。n-HA/PA66复合生物活性融合器于术后3～6个月骨性融合。颈椎生理曲度、椎间高度、颈椎稳定性均维持良好。无融合器下沉、塌陷、移位发生,无感染、内固定物松动、脱落、断裂等并发症。n-HA/PA66复合生物活性融合器能有效重建和维持颈椎体的结构和高度,可能是一种理想的颈椎植骨替代材料。     

Hepatitis C virus-specific cellular and humoral immune responses following immunization with a multi-epitope fusion protein

Hepatitis C virus (HCV) is an important causative agent of acute and chronic hepatitis worldwide. We prepared a fusion protein in the vector of pET-11d that included three conserved broadly neutralizing B-cell epitopes and a series of T-cell epitopes located in the HCV NS3 region. In vivo administration of this fusion construct resulted in specific CD8+ cytotoxic lymphocytes in both PBMCs and splenocytes that could recognize specific antigen sites that could be detected by FACS. An HCVcc system was established and applied to detect HCV-specific neutralizing antibodies. These results suggest that the multi-epitope fusion protein is immunogenic and can elicit both humoral and cellular immune responses. In particular, this fusion protein is able to elicit HCV-specific neutralizing antibodies, which are critical for viral clearance. This construct may be significant for vaccine development and could be a potential candidate to be included in the design of a prophylactic and therapeutic vaccine against HCV.     

儿童哮喘血清中SP-A、SP-D、IL-8、IgE的水平变化及临床意义

目的探讨哮喘患儿血清中肺表面活性蛋白A、D(SP-A,SP-D)、白介素8(IL-8)、免疫球蛋白E(IgE)含量的变化及其分析研究。方法测定30例儿童哮喘急性发作期和缓解期的SP-A、SP-D、IL-8、IgE及同期健康儿童30例。结果急性发作期的SP-A、SP-D水平均显著低于对照组(P<0.01),IL-8、IgE水平均显著高于对照组(P<0.01);缓解期的SP-A、SP-D水平明显高于发作期(P<0.05),IL-8水平明显低于发作期(P<0.05),IgE水平与发作期相比差异无显著性(P>0.05)。结论儿童哮喘的发作虽然是多种病因引起,IL-8、IgE等在其中的病理生理、免疫病理改变有重要作用。证明SP-A、SP-D含量及功能改变与哮喘的发病、发展关系密切。     

两种不同方法检测HIV抗体结果的比较

目的 对化学发光和酶联免疫法(ELISA)检测HIV抗体的方法进行评价,比较检测结果的差异,为HIV初筛的方法的选择和临床应用提供参考.方法 以HIV抗体确认实验结果为金标准,对3000例我院就诊的患者同时应用两种方法检测,对两结果进行比较,评价两种检测方法筛查HIV感染者的特异性、灵敏度.结果 ELISA检测法阳性率为0.93％,特异性为99.93％,灵敏度为89.66％,化学发光法阳性率为1.03％,特异性为99.93％,敏灵度为100％.结论 两种方法均适合HIV的初筛,都具有较高的特异性,化学发光法的灵敏度要优于ELISA方法.     

One‐Step Approach for the Preparation of Organic‐Inorganic Janus‐Like Particles by Alkalization of Polystyrene‐block‐Poly(2‐vinylpyridine)/FeCl3 Complex Micelles

A novel approach to organic‐inorganic Janus‐like particles based on the alkalization process of polystyrene‐block‐poly(2‐vinylpyridine) (PS‐b‐P2VP) micelles containing FeCl₃ precursors in the P2VP cores in toluene is presented. It is found that by addition of a small amount of NaOH solution to a solution of the spherical PS‐b‐P2VP/FeCl₃ micelles, organic‐inorganic Janus‐like particles with a produced α‐FeOOH domain on one side and PS‐b‐P2VP block copolymers on the other can be prepared. The Janus‐like nanoparticles obtained by this facile approach may have potential application in biomedical areas.     

癫痫筛查表的真实性评价及癫痫危险因素分析

目的：考评癫痫流行病学调查表的真实性，了解自然人群癫痫患者的危险因素状况。 方法：于2005-03／04采用自制调查表对昆明医学院第一、第二附属医院神经内科就诊的患者进行癫痫筛查，调查表询问题为5个，内容包括筛查项目、患者基本情况（9项）和健康相关情况（24项）3部分；只要5项中有1项回答为“是”，则判为筛查试验阳性，并与神经内科医生做出的诊断做比较。并对诊断为原发性或继发性癫痫的患者进行危险因素分析的调查。 结果：共调查35l例，问卷完整有效349例。①真实性评价：灵敏度94．87％，特异度92．25％，正确诊断指数为0．9095。②不同年龄组之间癫痫患者构成比存在显著性差异（r=88．292，P〈0．01），儿童为主要患者群。③经过多因素逐步条件Logistic回归分析发现，癫痫家族史（OR=9．851）、脑损伤（OR=4．301）、非顺产（OR=5．361）和新生儿疾病（OR=4．980）与癫痫有着很强的关联。 结论：该癫痫调查表用于医院癫痫的流行病学筛查真实性较好，可用于癫痫的流行病学筛查。癫痫家族史、分娩方式、脑损伤都是癫痫的危险因素。     

Preparation of Indapamide slow-release pellets

During the process of developing a slow-release formulation of indapamide, researchers created a drug-containing pellet coated with Eudragit RS100 (Rohm GMbH & Co. KG, Darmstadt, Germany) to control the rate at which the drug was released. The two main variables were the agglomerants used in the pellet preparation and the amount of Eudragit RS100 used to coat them. The optimal outcome was indicated by the greatest number of drug-containing pellets recovered through an 18- to 24-mesh sieve and a satisfactory 24-hour release curve. The kinetics of dissolution fit the Higuchi kinetics model. Stability tests of the drug pellets showed no notable changes in the rate of drug release, related substances (mean byproducts or impurities from interactions or decompositions), and drug content.     

Fine mapping analysis confirms and strengthens linkage of four chromosomal regions in familial hypospadias

Hypospadias is a common male genital malformation and is regarded as a complex disease affected by multiple genetic as well as environmental factors. In a previous genome-wide scan for familial hypospadias, we reported suggestive linkage in nine chromosomal regions. We have extended this analysis by including new families and additional markers using non-parametric linkage. The fine mapping analysis displayed an increased LOD score on chromosome 8q24.1 and 10p15 in altogether 82 families. On chromosome 10p15, with the highest LOD score, we further studied AKR1C2, AKR1C3 and AKR1C4 involved in steroid metabolism, as well as KLF6 expressed in preputial tissue from hypospadias patients. Mutation analysis of the AKR1C3 gene showed a new mutation, c.643G>A (p.(Ala215Thr)), in a boy with penile hypospadias. This mutation is predicted to have an impact on protein function and structure and was not found in controls. Altogether, we homed in on four chromosomal regions likely to harbor genes for hypospadias. Future studies will aim for studying regulatory sequence variants in these regions.     

CH-VAD左心辅助装置动物体内实验研究

验证磁悬浮左心辅助装置(CH-VAD)动物体内植入后的安全性及可靠性。选择健康雄性绵羊6只,经麻醉诱导、呼吸插管后开胸,在心脏不停跳的情况下开通由左心尖到辅助装置,再到降主动脉的辅助循环通路。术后常规予以密切监护及抗凝治疗,持续监测装置运行状况,实验动物在术前及术后分别进行细胞学及血液生化指标检测。实验观察结束后,动物予以安乐死,进行尸检及组织病理检查。6例实验动物中:2例因室颤或窒息死亡,1例因肺部感染于20 d终止观察,2例观察至实验结束(60 d)后取材进行病理检查,1例60 d后继续观察并因肺部感染于135 d终止实验。对成功植入的实验动物进行有效观察,装置悬浮状态良好,运转正常;CH-VAD植入后,细胞学及血液生化检查均在正常范围内。尸解及组织病理检查发现:2例存活 20和135 d的动物,出现肺炎和肾脏多发性梗死;2例存活 60 d的动物,出现肾脏单发小梗死,其余脏器未见明显异常。该实验为CH-VAD临床前评价及临床操作提供理论及技术支持,并证明其具有相对稳定的工作性能;提出建立左心辅助装置临床前评价标准的思路和想法,为后期装置的植入及临床操作提供研究的方向。     

Nogo—A及NgR在墨西哥钝口螈脑组织中的表达及意义

目的探讨勿动蛋白A（Nogo．A）及勿动蛋白受体（NgR）在正常墨西哥钝VI螈及其中脑胆碱能神经元损伤后脑组织中的表达。方法以正常墨西哥钝口螈脑组织和中脑胆碱能神经元损伤后第3、7、14、21天脑组织作为研究对象,采用免疫荧光技术观察正常墨西哥钝口螈脑组织中Nogo—A及NgR的表达;分别用荧光定量PCR和蛋白质印迹法（WB法）检测正常墨西哥钝口螈和损伤组脑组织中Nogo—A及NgR的mRNA含量和蛋白含量的变化。结果正常墨西哥钝口螈脑组织中存在Nogo．A及NgR的表达,在墨西哥钝口螈中脑胆碱能神经元损伤后（注入AF64A）第3天,中脑乙酰胆碱转移酶（CHAT）阳性细胞数明显减少,与正常组比较差异有统计学意义（P〈0．01）,损伤后第7、14、21天均有ChAT、5-溴脱氧尿嘧啶核苷（BrdU）双阳性细胞,且随时间的延长而增加。中脑胆碱能神经元损伤后第3、7、14、21天脑组织中,Nogo．A的mRNA和蛋白水平的表达量与正常组比较差异均无统计学意义;而NgR的mRNA和蛋白水平的表达量均下降,与正常组比较差异有统计学意义（P〈0．05）。结论中枢神经系统损伤后的再生可能与NgR表达量的下降有关。