Differential etiology of posttraumatic stress disorder with conduct disorder and major depression in male veterans.

BACKGROUND: Epidemiologic studies reveal that posttraumatic stress disorder (PTSD) is highly comorbid with both conduct disorder and major depression in men. The genetic and environmental etiology of this comorbidity has not been examined. METHODS: Data were analyzed from 6744 middle-aged male-male monozygotic and dizygotic twins from the Vietnam Era Twin Registry. Conduct disorder, major depression, and PTSD were assessed via telephone interview using the Diagnostic Interview Schedule for the DSM-III-R in 1992. Structural equation modeling was used to estimate additive genetic, shared environmental, and individual-specific environmental effects common and specific to conduct disorder, major depression, and PTSD. RESULTS: The association between conduct disorder and PTSD was explained primarily by common shared environmental influences; these explained 10% (95% confidence interval: 6%-17%) of the variance in PTSD. The association between major depression and PTSD was largely explained by common genetic influences; these explained 19% (95% confidence interval: 11%-26%) of the variance in PTSD. CONCLUSIONS: Our findings suggest that different etiologic mechanisms explain the association of conduct disorder and major depression with PTSD in male veterans. If replicated in other populations, results suggest research aimed at identifying specific genetic and environmental factors that influence PTSD may benefit from starting with those that have been more consistently and strongly associated with major depression and conduct disorder.     

3种微创手术治疗复杂性输尿管上段结石的疗效比较

目的比较经尿道输尿管镜钬激光碎石(URSL)联合体外冲击波碎石(ESWL)、微创经皮肾镜取石(mini-PCNL)、后腹腔镜输尿管切开取石术(RLU)治疗复杂性输尿管上段结石的疗效。方法153例复杂性输尿管上段结石患者按治疗方法分为三组:URSL联合ESWL(联合组)治疗60例,mini-PCNL治疗65例,RLU治疗28例。结果联合组有5例转开放手术取石,余50例患者平均手术时间(65.45±16.39)min,术后并发症发生率为23.64%(13/55),1个月后结石清除率为90.91%(50/55)。mini-PCNL组无中转,平均手术时间(50.38±12.91)min,术后并发症发生率为9.23%(6/65),1个月后结石清除率为100%。RLU组有2例转开放取石,平均手术时间(81.73±17.89)min,术后并发症发生率为15.38%(4/26),1个月后结石清除率为100%(26/26)。mini-PCNL组的手术时间、术后住院时间均显著短于联合组和RLU组;并发症发生率明显低于联合组;1个月后结石清除率明显高于联合组。结论mini-PCNL治疗复杂性输尿管上段结石具有手术时间短、结石清除率高、术后并发症少、恢复快的优点。     

2003-2005年积水潭医院烧伤感染常见细菌及耐药性分析

目的 了解笔者单位近期的烧伤感染细菌分布及耐药情况。方法 收集2003年1月-2005年12月从笔者单位492例烧伤住院患者创面分泌物、静脉导管、血液、尿液、粪等标本分离而得的菌株，对其菌种分布特点及耐药性进行分析。结果 送检标本中革兰阴性菌多于革兰阳性菌。革兰阳性菌292株，分离率最高者为金黄色葡萄球菌（16．7％），其中甲氧西林耐药金黄色葡萄球菌在金黄色葡萄球菌中占82．5％；革兰阴性菌372株，分离率较高的分别为铜绿假单胞菌（12．5％）、大肠埃希菌（11．1％）。3年中大肠埃希菌和肺炎克雷伯菌对超广谱β内酰胺酶的耐药率分别为60．8％和42．9％。结论 笔者单位烧伤病区细菌耐药问题严重，仍需不断监测病区菌种变化及药物敏感情况，以有效地控制细菌感染和耐药菌株的播散。     

Comparison of Marker Intervals and Number of Sib Pairs Used for Linkage Analysis on Simulated Nuclear Family Data

Using a two‐stage global scan design, we analyzed general population replicates 1 and 42 of the Genetic Analysis Workshop (GAW) 12 simulated data set using three methods: revisited Haseman‐Elston (HER), maximum likelihood variance estimation (ML), and variance components (VC). Three marker densities, 5‐, 10‐, and 15‐cM intervals, were examined in the first‐stage scan. We found that the 10‐cM interval appears to be the most cost‐effective approach in genotyping without sacrificing power when using a first stage significance level of 0.01. Subsequently, we performed the second‐stage scan at 1‐cM intervals for those putative positive regions identified in the first‐stage scan at a significance level of 0.01. We also compared the power to detect linkage using different numbers of sib pairs for a genome‐wide scan at a 10‐cM interval and found that power decreases nonlinearly as the number of sib pairs decreases. © 2001 Wiley‐Liss, Inc.     

高海拔地区脑瘫病因及类型分析

本文通过对１２０例脑瘫患儿病因及临床分型的分析，可以看出脑瘫发病的主要因素以新生儿窒息、缺氧、核黄疸、早产儿为主；从临床分开来看，脑瘫以痉挛型多见，其次为手足徐动型和肌无力型；关于脑瘫的诊治，强调早诊断、早治疗，同时撮加强围产期保健及提高产科接生技术，可以预防脑瘫的发生。     

乳腺癌患者血中角蛋白mRNA基因的表达

目的 分析乳腺癌患者外周血液中角蛋白（CK19）mRNA基因的表达。方法 取20例经病理证实的乳腺癌患者外周血，用Tirizol法提取总RNA，然后进行RT－PCR荧光定量检测，并与正常人群进行对照。结果 正常人群外周血中无CK19表达，20例乳腺癌中有6例阳性表达，总阳性率为29．65％，其中单纯癌阳性率为30．7％（4／13），浸润性导管癌阳性率为28．6％（2／7）。结论 CK19可作为检测外周血循环癌细胞的标志物。     

顺丁烯二酸水溶液的热反应动力学

研究了不同温度、浓度条件下，顺丁烯二酸（顺酸）非催化反应网络，即顺酸可生成反丁烯二酸（反酸）和苹果酸，反酸与苹果酸存在可逆反应。建立了该反应网络的动力学模型。测定了不同反应条件下顺酸、反酸和苹果酸浓度随时间变化的规律，据此，动力学参数进行了估值。     

Proliferative activity of calcifying odontogenic cysts as evaluated by proliferating cell nuclear antigen labeling index

The calcifying odontogenic cyst (COC) presents with diverse hlstologlcal features; thus, several subclasslfl-cations have been proposed. To evaluate the slgnlficance of the various histological features and subtypes of COC from the perspectlve of proliferative activity, the proliferating cell nuclear antigen (PCNA) labellng index (LI; the percentage of positive nuclei) was assessed immunohistochemlcally in 25 cases of COC (21 benign and four malignant). All of the benign cases were of the cystic variety and further subclas-sified into non-proliferative subtype (NPS; four cases); proliferative subtype (PS; eight cases); and COC associated with odontoma (COCaO, nlne cases). The PCNA U of the mallgnant COC (65.2 ± 5.6) was slgnlflcantly higher than that of the benlgn COC (11.6 ± 9.0; P = 0.002). Non-proliferative subtype (6.8 ± 2.8) showed the lowest PCNA LI and PS (17.2 ± 11.2) the highest of among the three subtypes of benign cystic COC (P = 0.028). In nine cases of COCaO, six showed epithelial lining of the non-proliferative type as NPS and the other three had lining wlth proliferative features as PS. The PCNA LI of the latter COCaO group (14.3 ± 6.6) was significantly higher than that of the former (6.1 ± 4.3; P = 0.05), as Seen between PS and NPS. These results demonstrate that PCNA LI is a possible parameter for differentiating mallgnant COC from benign COC and, whatever the subtypes, the proliferative features In the lining are the main factor influencing the prollferatlng actlvity of COC.     

高血压病心尖搏动图的改变

50例高血压病人ACG和 FDACG 检测的结果显示:高血压病不论舒张压高低或有无心脏增大,均有舒张功能改变,表现为A/EO 比值增高,A_2-dA/dt-min 和A_2O延长。此三项指标的异常出现率分别为40％、30％及14％,三项联合检测其中任何一项异常的出现率为54％。收缩功能无明显改变。治疗显效后,A/EO降低,A_2-dA/dt-min 缩短,说明心功能明显改善。