1 240例女性生殖道支原体感染分析

目的 为了解生殖道支原体在晚期孕妇、育龄妇女、念珠菌性阴道炎和淋球菌性阴道炎患者中的感染状况。方法 采用套式聚合酶链反应技术，对962例晚期孕妇、85例育龄妇女、90例念珠菌性阴道炎和103例淋球菌性阴道炎患者的宫颈拭子标本进行了生殖道支原体检测。结果 在晚期孕妇、育龄妇女、念珠菌性阴道炎和淋球菌性阴道炎患者中生殖道支原体的检出率分别为4．16％、3．52％、11．1l％和13．59％。结论 生殖道支原体在晚期孕妇、育龄妇女、念珠菌性阴道炎和淋球菌性阴道炎妇女中均有一定的检出率。     

我国登革2型病毒43株包膜E蛋白基因的特征

对我国1987年流行的登革2型病毒43株包膜E蛋白基因的核苷酸序列进行了分析。结果表明登革2型病毒43株包膜E蛋白基因核苷酸序列含1485个核苷酸，编码495个氨基酸，并就其核苷酸序列及其相应的氨基酸序列与其它的登革2型病毒株进行了比较，发现核苷酸序列与我国1985年分离的登革2型病毒04株，新几内亚C株（NGC），牙买加株1409（JAM）和马来西亚当地流行株M1（登革出血热）、血2（登革休克综合征）、M3（登革热）同源性分别是95.8%、94.6%、97.5%、925%、92.7%和939%，氨基酸序列的同源性分别是94.3%、94.3%、96.0%、93.7%、93.7%和91.5%，推断出的氨基酸序列显示出12个保守的半胱氨酸残基和两个潜在的糖基化位点，分别位于Asn-67和Asn-153位。     

Effect of Cu2+ on relaxations to the nitrergic neurotransmitter, NO and S-nitrosothiols in the rat gastric fundus.

1. The effects of addition of Cu2+ and chelation of Cu2+ were studied on relaxations in response to S-nitrosothiols and on relaxations to non-adrenergic non-cholinergic (NANC) nerve stimulation, nitric oxide (NO) and glyceryl trinitrate (GTN) in the rat gastric fundus. 2. The S-nitrosothiols S-nitroso-L-cysteine (NOCys, 1-300 nM), S-nitrosoglutathione (GSNO, 0.01-3 microM) and S-nitroso-N-acetyl-D,L-penicillamine (SNAP, 0.01-3 microM) induced concentration-dependent relaxations of the rat gastric fundus muscle strip. The relaxant potencies of the S-nitrosothiols were NOCys > SNAP > GSNO. Relaxations to NOCys were transient and comparable to those to NANC nerve stimulation and NO whereas relaxations to GSNO and SNAP were sustained. The relaxations to NOCys, GSNO and SNAP were significantly and concentration-dependently enhanced by CuSO4 (3-30 microM). The order of relaxant potency in the presence of CuSO4 was reversed to GSNO approximately SNAP > NOCys. 3. In the presence but not in the absence of 0.1 microM GSNO, CuSO4 (1 microM) induced a rapid and transient relaxation which was inhibited by the superoxide radical generator, pyrogallol (30 microM). CuCl2 but not FeSO4 mimicked the effect of CuSO4. 4. Electrical stimulation (0.5-8 Hz) of the rat gastric fundus strips induced frequency-dependent relaxations which were previously shown to be nitrergic in nature and which were not affected by CuSO4 (3-30 microM). Relaxations to NO (3-100 nM) and GTN (0.01-1 microM) were not affected by 3 and 10 microM CuSO4 but were inhibited by 30 microM CuSO4. 5. The Cu2+ chelator, bathocuproine (3-30 microM) significantly and concentration-dependently inhibited the relaxations to NOCys (0.01-3 microM), GSNO (0.01-10 microM) and SNAP (0.01-3 microM). The inhibitory effect of 10 microM bathocuproine was reversed by 3 microM CuSO4. 6. Bathocuproine (3-30 microM) had no effect on the relaxations to NANC nerve stimulation (0.5-8 Hz) or on the concentration-response curve to NO (0.01-0.3 microM), whereas relaxations to GTN (0.01-1 microM) were significantly inhibited by 30 microM bathocuproine. 7. From these results we conclude that relaxations to S-nitrosothiols and to nitrergic stimulation of the rat gastric fundus are differentially affected by addition and chelation of Cu2+, suggesting that the nitrergic NANC neurotransmitter in the rat gastric fundus is not an S-nitrosothiol but is more likely to be free nitric oxide.     

多巴酚丁胺负荷及运动试验~(99m)Tc-MIBI心肌断层显像与冠状动脉造影的对比研究

比较６９例冠心病患者多巴酚丁胺负荷９９ｍＴｃ甲氧基异丁基异腈（ＭＩＢＩ）心肌断层显像与８２例运动试验９９ｍＴｃＭＩＢＩ心肌断层显像的结果，以探讨它们对冠心病的诊断价值。结果表明：以冠状动脉造影结果为标准，多巴酚丁胺负荷诊断冠心病的敏感性和特异性分别为９１２％和８００％，运动试验分别为８９４％和８２９％。多巴酚丁胺负荷检出冠状动脉病变的敏感性和特异性：左前降支为７８１％和９１３％，回旋支为６６７％和９８２％，右冠状动脉为１００％和８３７％；运动试验分别为７８３％和９１１％，６００％和９６８％，９０９％和８５０％，差异均无显著性（Ｐ＞００５）。提示两者结果相近，对于不能进行运动试验的病人，多巴酚丁胺试验是一种有价值的诊断冠心病的方法。     

重组跨膜型人CD55分子在小鼠NIH3T3细胞上的表达及其补体溶破保护功能的研究

目的 :在小鼠NIH3T3细胞转染表达人天然GPI锚固型CD5 5和重组跨膜型CD5 5 TM分子 ,观察比较它们对人补体溶破异源细胞的抑制功能。方法 :将带有CD5 5cDNA、CD5 5 TMcDNA的重组逆病毒表达质粒CD5 5 pLXSN、CD5 5TM pLXSN经脂质体法转染PA317细胞 ,用病毒上清感染小鼠成纤维母细胞NIH3T3。经G418加压筛选 ,利用FACS检测获得表达CD5 5和CD5 5 TM分子的阳性细胞克隆 ,通过MTT比色法比较两种分子对人血清补体溶破细胞的抑制功能有无差别。结果 :细胞转染筛选获得多个表达跨膜型人CD5 5分子的NIH3T3细胞克隆 ,补体杀伤试验证实其具有抑制人补体溶破的功能 ,且两种分子的补体抑制功能无明显差异。结论 :成功地建立了稳定表达天然CD5 5、跨膜型CD5 5分子的小鼠NIH3T3细胞 ,证实其表达的GPI型CD5 5分子和CD5 5TM分子均具有抑制人补体溶破细胞的功能 ,为进一步探讨应用跨膜型的CD5 5分子对PNH进行基因治疗奠定了基础。     

子宫内膜异位症及卵巢癌腹腔IL-6、IL-8变化的临床意义

目的:探讨白细胞介素6(IL-6)、白细胞介素8(IL-8)与子宫内膜异位症(endomotriosisEMs)卵巢癌的发生发展关系。方法:采用双抗体夹心ABC-酶联免疫吸附实验(ELISA)对EMs患者30例、血清及腹腔液中IL-6、IL-8进行检测,并以卵巢癌患者10例、卵巢良性肿瘤患者30例、正常妇女血清30例做对照组。结果:EMs组与卵巢癌组患者血清及腹腔液中IL-6、IL-8水平明显高于对照组(P<0.01),EMs组与卵巢癌组对比无显著性差异(P>0.05)。结论:EMs患者腹腔液中IL-6、IL-8异常增高是腹腔免疫内环境失衡,与EMs的发生发展有关,在药物治疗中血清IL-6、IL-8可作为EMs疗效和预后的指标之一。     

End-to-end oesophageal anastomosis: an experimental study in the rat

To study the effects of suture material, calibre and tension on the end-to-end oesophageal anastomosis, the cervical oesophagus of the rat was resected for 2.5 mm, 7.5 mm and 12.5 mm respectively in three groups of 60 rats each. End-to-end anastomosis was performed with either 6/0 silk, 6/0 polypropylene or 9/0 polypropylene sutures. There was no postoperative leakage. Mortality was mainly due to hair bolus obstruction at the site of anastomosis. There was no difference in mortality and anastomotic stenosis between groups with different resection lengths. Within each group, however, mortality and anastomotic stenosis were significantly higher in the subgroup of rats with 6/0 silk suture than that in the subgroup with 6/0 polypropylene sutures, which also had significantly higher mortality and anastomotic stenosis than the subgroup with 9/0 polypropylene sutures. Histological examination of the stenosed anastomosis showed disruption of muscle layers and submucosal thickening. It is concluded that the use of fine calibre sutures of biologically inert material would be preferred for the end-to-end anastomosis of the oesophagus.     

阿昔洛韦对单纯疱疹病毒脑炎小鼠脑细胞的保护作用

目的 了解单纯疱疹病毒脑炎(HSE)脑细胞结构的改变及药物的影响。方法 采用光学显微镜及透射电子显微镜观察HSE小鼠脑细胞结构的变化，并给予阿昔洛韦(ACV)及地塞米松(DEX)治疗，观察治疗后脑细胞结构的变化。结果 HSE小鼠脑神经细胞明显肿胀，核仁固缩，核内结构破坏，线粒体及高尔基体可见空泡样变性，核仁内可见病毒颗粒。用药物干预的小鼠脑神经细胞改变较轻微，未找到病毒颗粒；与单用ACV干预的小鼠相比，用ACV DEX干预的小鼠脑神经细胞及毛细血管周围水肿明显减轻。结论 HSE早期给予ACV DEX治疗，对HSE脑细胞结构有明显保护作用。     

Fatty acids in blood and intestine following docosahexaenoic acid supplementation in adults with cystic fibrosis.

The objective of this study was to investigate the effect of docosahexaenoic acid (DHA) supplementation on blood and intestinal DHA levels and lung function in mild/moderately affected adult CF patients with the DeltaF508 genotype. BACKGROUND: Cystic Fibrosis (CF) patients often present with plasma fatty acid levels indicating low levels of linoleic (18:2n-6) and docosahexaenoic (22:6n-3) acids and an increased level of arachidonic acid (20:4n-6). Improved dietary fat intake or reducing fat malabsorption with pancreatic enzymes has failed to normalize this biochemical deficiency of DHA. METHODS: Five CF patients, aged 18-43, received 70 mg of DHA/kg body weight/d for six weeks. At baseline and at six weeks a physical exam, lung function, 3-day dietary intake, duodenal mucosal biopsy and blood sample were assessed. The blood was analyzed for plasma vitamin A, D and E levels, liver function tests, clinical chemistry (CBC, differential and electrolytes). Plasma and red blood cell fatty acid levels were also analyzed. At three weeks, assessment included a physical exam, lung function test and fasting blood sample (vitamin levels, liver function and clinical chemistry only). RESULTS: Pre- and post-measurements were compared for the four subjects who completed the study. An increase in DHA content (% w/w) was observed in all phospholipid fractions of plasma, red blood cell and mucosal samples. No significant differences in vitamin levels, liver function or lung function were observed. CONCLUSIONS: The study proves the concept that an increase in tissue DHA levels in CF patients can be achieved by supplementing for six weeks with 70 mg/kg/d DHA.