Is mitochondrial DNA copy number a good prognostic marker in resectable pancreatic cancer?

Background

The aim of this prospective study was to investigate mitochondrial DNA (mtDNA) copy number in a group of resectable pancreatic cancer (PC) tumor tissues and adjacent normal pancreatic tissues, and to explore the correlation between the mtDNA content in tissues and the clinicopathological parameters and the overall survival.

Measuring progress to healing: A challenge and an opportunity

Complete healing is problematic as an endpoint for evaluating interventions for wound healing. The great heterogeneity of wounds makes it difficult to match groups, and this is only possible with multivariate stratification and/or very large numbers of subjects. The substantial time taken for wounds to heal necessitates a very lengthy study. Consequently, high quality randomised controlled trials demonstrating an effect of an intervention to a satisfactory level of statistical significance and with a satisfactory level of generalisability are extremely rare. This study determines that the healing of venous leg ulcers receiving multi‐component compression bandaging follows a linear trajectory over a 4‐week period, as measured by gross area healed, percentage area healed, and advance of the wound margin. The linear trajectories of these surrogates make it possible to identify an acceleration in healing resulting from an intervention, and allows self‐controlled or crossover designs with attendant advantages of statistical power and speed. Of the metrics investigated, wound margin advance was the most linear, and was also independent of initial ulcer size.     

景洪市肺吸虫病流行区20年后的变化

目的了解景洪市肺吸虫病流行区20年后疫区疫情变化和溪蟹的自然感染情况。方法从原流行区采集溪蟹,鉴定种类,用研磨水洗沉淀法、生物体视显微镜检查囊蚴或脱囊蚴并计数。将本次检查结果与周本江等1989年报告的结果进行比较,获得该流行区的纵向变化结果,分析引起变化的主要原因。结果从原流行区共采集溪蟹474只,经鉴定全为景洪溪蟹;从溪蟹体内共检获95个囊蚴,经分类鉴定全部为小睾并殖吸虫囊蚴,并通过感染实验动物家猫获得成虫加以证实。溪蟹的自然感染率为10．8％,感染度平均为1．86。结论景洪市同一流行区20年后发生了明显的变化,无论是溪蟹的种类、肺吸虫的虫种、溪蟹的自然感染率、感染度均出现了明显的下降。引起这些变化的主要原因是居民的健康意识增强和环境因素的改变所致。     

自体刃厚头皮片移植厚中厚皮片供区以抑制瘢痕增生

目的:探讨应用自体刃厚头皮片移植厚中厚皮片供区以抑制瘢痕增生的可行性及应用效果。方法:烧伤后全身大范围的增生性瘢痕患者24例,行功能部位的增生性瘢痕切除,应用非功能部位的大张厚中厚皮片修复,厚中厚皮片供区应用刃厚头皮片移植修复。结果:24例患者非功能部位厚中厚皮片供区经刃厚头皮片移植后,未见有明显的瘢痕增生。经随访半年至2年11例,2年以上3例,均未见有明显的瘢痕增生。头皮片供区无瘢痕形成,头发生长良好。结论:应用自体刃厚头皮片移植厚中厚皮片供区抑制瘢痕增生是一种可行的方法,值得临床推广。     

不同军事应激环境中官兵心理应激反应及中介因素比较研究

目的比较不同军事应激环境中官兵心理应激反应及其中介因素,探索军事应激损伤防护规律。方法从空降兵新兵跳伞、部队一级战备、汶川抗震救灾3种军事应激情境中分批整群抽取3组样本,共2555名军人作为研究对象,采用＂症状自评量表（SCL-90）＂、＂军事群体心理应激预警检测工具（ATQMGS）＂分别评估3组样本的心理应激反应及其中介因素的差异。结果以SCL-90总分为标准,3组样本心理应激反应强度由高到低依次为部队战备组、新兵跳伞组、抗震救灾组;3组心理应激反应与领导支持、应对方式、士气、自我效能、控制感、战友支持、晋升动机、任务认知、岗位价值感、单位归属感等因素得分均呈负相关（-0.144～-0.547）;在新兵跳伞组不同的家庭收入心理应激反应差异具有统计学意义（P〈0.01）,在部队战备组不同的军龄、职别心理应激反应差异具有统计学意义（P〈0.01）,在抗震救灾组不同的年龄、户籍、心理应激反应差异具有统计学意义（P〈0.05）。结论在3种军事应激情境中,军事群体中的领导支持、应对方式、士气、自我效能、控制感、战友支持、晋升动机、任务认知、岗位价值感、单位归属感等因素,对应激反应均有显著影响,官兵的人口学特征在不同的军事应激环境中影响不同。     

中级评分系统对TACE与肝切除术治疗BCLC-B期中度肝细胞性肝癌的预后价值

目的探讨中级评分系统(intermediate stage score,ISS)在中度肝细胞性肝癌(intermediate-stage hepatocellular carcinoma,IHCC)患者接收受肝动脉化疗栓塞(transarterial chemoembolization,TACE)和肝切除(liver resection,LR)术后对预后评估的判断价值及指导意义。方法回顾性分析2009年4月至2011年10月温州医科大学附属第三医院行TACE或LR治疗的260例BCLC-B期IHCC患者的临床资料。其中,LR组139例,TACE组121例,共260例,所有病例均经住院或电话随访,根据患者临床及随访资料进行统计学分析。采用倾向性评分匹配(propensity scorematching,PSM)法去除混杂因素后,判断ISS在LR组和TACE组中的预后判断价值。结果 260例BCLC-B期患者中,男160例(61.5%),女100例(38.5%),平均年龄为(59.1±10.3)岁。不同ISS分级患者的中位生存时间存在差异,随ISS评级增高,中位生存时间降低,分别为:1级48个月,2级37.5个月,3级24个月,4级17.5个月,5级10个月,各组差异具有统计学意义(P0.05)。LR组中ISS 4~5级患者预后差于ISS 1级患者(HR=2.542,95%CI=0.461~8.416);同样,在TACE组中ISS 4~5级患者预后也比ISS 1级患者更差(HR=2.542,95%CI=0.461~8.416);经似然比检验,ISS在LR及TACE组均是一个有效的预后预测因子(P=0.018和P=0.003)。进一步比较TACE和LR两治疗组间ISS的预后价值差异,结果显示,两组的相同ISS分级间预后并无差异(P=0.121)。结论 ISS可预测BCLC-B期IHCC患者的预后,减少异质性,是临床选择TACE和LR治疗方案的患者的有效预后判断工具。     

Intermediate follow-up following intravascular stenting for treatment of coarctation of the aorta.

BACKGROUND: We report a multiinstitutional study on intermediate-term outcome of intravascular stenting for treatment of coarctation of the aorta using integrated arch imaging (IAI) techniques. METHODS AND RESULTS: Medical records of 578 patients from 17 institutions were reviewed. A total of 588 procedures were performed between May 1989 and Aug 2005. About 27% (160/588) procedures were followed up by further IAI of their aorta (MRI/CT/repeat cardiac catheterization) after initial stent procedures. Abnormal imaging studies included: the presence of dissection or aneurysm formation, stent fracture, or the presence of reobstruction within the stent (instent restenosis or significant intimal build-up within the stent). Forty-one abnormal imaging studies were reported in the intermediate follow-up at median 12 months (0.5-92 months). Smaller postintervention of the aorta (CoA) diameter and an increased persistent systolic pressure gradient were associated with encountering abnormal follow-up imaging studies. Aortic wall abnormalities included dissections (n = 5) and aneurysm (n = 13). The risk of encountering aortic wall abnormalities increased with larger percent increase in CoA diameter poststent implant, increasing balloon/coarc ratio, and performing prestent angioplasty. Stent restenosis was observed in 5/6 parts encountering stent fracture and neointimal buildup (n = 16). Small CoA diameter poststent implant and increased poststent residual pressure gradient increased the likelihood of encountering instent restenosis at intermediate follow-up. CONCLUSIONS: Abnormalities were observed at intermediate follow-up following IS placement for treatment of native and recurrent coarctation of the aorta. Not exceeding a balloon:coarctation ratio of 3.5 and avoidance of prestent angioplasty decreased the likelihood of encountering an abnormal follow-up imaging study in patients undergoing intravascular stent placement for the treatment of coarctation of the aorta. We recommend IAI for all patients undergoing IS placement for treatment of CoA.     

广州管圆线虫抗原IF的中间纤维蛋白组织来源分析和定位

目的 对广州管圆线虫抗原IF进行中间纤维蛋白家族分类和细胞组织定位.方法 IFTG诱导重组基因pET-IF在大肠杆菌中表达广州管圆线虫抗原IF,用组氨酸亲和层析纯化表达产物,用Western blot方法鉴定抗原IF的中间纤维蛋白类型;小鼠皮下多点注射法制备抗IF抗体血清,用免疫组织化学方法检测抗原IF在虫体组织和细胞上的定位.结果 广州管圆线虫抗原IF在体外成功表达并纯化,其属于中间纤维蛋白家族的角蛋白,定位于广州管圆线虫成虫肠管壁,存在于细胞质中.结论 广州管圆线虫抗原IF分布于虫体肠管壁,同时从组织学角度证明广州管圆线虫存在中间纤维结构.