强迫症的局部脑血流动态显像研究

目的　探讨强迫症患者各脑叶的代谢状态及脑功能异常与其发病的关系。　　方法　采用单光子发射计算机扫描 (SPECT)技术 ,对未服药的 2 2例强迫症患者于静息及症状诱发状态下行局部脑血流 (rCBF)动态显像研究。　　结果　 1 8例有rCBF异常 ,表现为皮层内局限性放射性分布稀疏、缺损区 ,异常脑叶主要为顶叶、额叶、颞叶 ,并发现脑功能异常与强迫症状的严重程度及药物治疗反应有关。　　结论　大脑顶叶、额叶等脑叶的功能异常是部分强迫症发病的神经病理学基础     

中国人丙型肝炎病毒囊膜蛋白2HVR1 cDNA的序列分析

目的：了解中国ＨＣＶ流行株高变区１（ＨＶＲ１）的特点。方法：对来自山东（ＳＤ）、上海（ＳＨ）两地患者血清ＲＮＡ进行逆转录－巢式ＰＣＲ，扩增ＨＣＶ囊膜蛋白２基因片段，用ＰＣＲ直接测序法对该片段进行序列测定。结果：（１）扩增片段（命名为Ｐ３８８）对应于日本ＨＣＶ－Ｊ株序列核苷酸１４３９￣１８２６位（氨基酸位３７１￣４９８）；（２）中国人ＨＣＶ ＨＶＲ１位于氨基酸位３８４￣４１０，与发表的ＨＣＶⅡ型ＨＶ     

Studies on hepatitis C virus and prevalence of its infection in China

PrinceandGoldfieldfirstreportedthenon--A,non--Bpost--transfusionhepatitis(NANBH)byexclusivediagnosisin1974.Theepidemiologicda.talaterconfirmedthatthereweretwokindsofNANBH,parenterallytransmittedNANBHandenterallytransmittedNANBH.'In1989,Chooandhiscolleagues['JidentifiedhepatitisCvirus(HCV)genomiccDNAbyimmunoscreeningtheAgtllcDNAlibraryofthevirus,themajorcausativeagentofparenterallytransmittedNANBH.TheanalysisofthegenomeshowedthatHCVisamemberofflavivirusfamilywithasinglepositiv…     

Equally high prevalences of infection with cagA-positive Helicobacter pylori in Chinese patients with peptic ulcer disease and those with chronic gastritis-associated dyspepsia.

Approximately 60% of Helicobacter pylori isolates in the Western world possess the cytotoxin-associated gene A (cagA). cagA-positive H. pylori is found to be associated with peptic ulcer disease (PUD) and gastric adenocarcinoma. To investigate the cagA status of H. pylori isolates from Chinese patients with PUD and chronic gastritis (CG), H. pylori populations from 83 patients, 48 with PUD and 35 with CG, were assessed by two different cagA-specific PCRs, Southern blotting, and colony hybridization. The combined results from PCR, Southern blotting, and colony hybridization indicate a prevalence of cagA-positive H. pylori isolates of 98% (47 of 48) among Chinese PUD patients and 100% (35 of 35) among Chinese CG patients. Amplification with primer sets 1 and 2 yielded 52 and 95% of the 82 cagA-positive Chinese H. pylori, respectively. In contrast, the sensitivity of cagA-specific PCR for cagA-positive H. pylori isolates from Dutch patients with primer set 1 was 92% (112 of 122) and that with primer set 2 was 91% (50 of 55). The prevalence of cagA-positive H. pylori populations in Chinese patients with PUD and CG is almost universally high. Therefore, cagA cannot be used as a marker for the presence of PUD in Chinese patients. Our data further suggest that allelic variation in cagA may exist and that distinct H. pylori genotypes may circulate in China and Western Europe.     

大白鼠点状烫伤——一种评价烧、烫伤药物的动物模型

采用大白鼠点状烫伤的动物模型对“愈烫霜”进行药效学评价,结果表明:大白鼠点烫伤模型适合用于烧、烫伤药物的评价。     

短潜期体感诱发电位及其临床意义

本文测试了40例健康成人(男女各半)刺激腕正中神经和踝部胫后神经的短潜期体感诱发电位(SLSEPs),结果如下:1.SLSEPs多数PLs女性均较男性为短,这主要与肢长、身高有关,2.提供了SLSEPs的正常值,可供参考,3.检测SLSEPs对某些神经病损的定位诊断、治疗和预后的判断有重要临床意义。     

Locked intramedullary nailing for complex non-union of the tibia

Ten patients with complex non-union of the tibia were treated by locked intramedullary nailing. These patients had scarred skin as a result of initial severe open fractures, multiple debridement or fasciotomies with external fixators and skin grafts applied. Seven of the patients also had previous osteomyelitis or pin track infections. Fully pain-free walking was achieved in all patients and radiological union in nine patients without the need for a bone graft. Four patients developed infection after nailing, of which three resolved with treatment.     

Small interfering RNA inhibits SARS-CoV nucleocapsid gene expression in cultured cells and mouse muscles

SARS-CoV isa newly identified coronavirus that causes severe acute respiratory syndrome （SARS）. Currently, there is no effective method available for prophylaxis and treatment of SARS-CoVinfections. In the present study, the influence of small interfering RNA （siRNA） on SARS-CoV nucleocapsid （N） protein expression was detected in cultured cells and mouse muscles. Four siRNA expression cassettes driven by mouse U6 promoter targeting SARS-CoV N gene were prepared, and their inhibitory effects on expression of N and enhanced green fluorescence protein （EGFP） fusion protein were observed.     

恶性疟P190抗原保守区Ⅰ、Ⅴ基因的亚克隆及在大肠杆菌中高效表达

作者采用PCR方法克隆了我国海南省FCC1/HN株P190抗原两个保守区基因,分别定名为P190CRI和P190CRV。基因片段经纯化后连接到pUC18载体中进行DNA序列分析,结果显示:除了P190CRV中有5个碱基变换外,其余序列均与MAD20型序列一致。经序列分析的两个基因片段分别与pGEX-2T载体连接,经双酶切鉴定后转化感受态JM109(DE_3)大肠杆菌进行高效融合表达,并且用Sepharose 4B-谷胱甘肽层析柱进行亲和纯化,结果为:两个插入基因片段均得到高效融合表达,经一步亲和纯化后就取得高纯度的重组蛋白。