苦参碱对脑胶质瘤C6细胞系的诱导分化

目的观察苦参碱对脑胶质瘤C6细胞株体外增殖的影响.方法应用甲基噻唑基四唑(MTT)比色法检测苦参碱对C6细胞增殖的抑制作用,采用流式细胞仪观察苦参碱对C6细胞周期的影响,以免疫组化SABC染色法检测胶质纤维酸性蛋白(glial fibrillary acidic protein, GFAP)表达,用以了解胶质瘤细胞分化的情况.结果苦参碱对C6细胞增殖抑制作用明显,在终浓度为0.5 mg*ml-1时,对C6增殖的抑制率达(24.4±0.9)%.经流式细胞仪分析显示,用0.5 mg*ml-1苦参碱培养72 h,C6细胞出现了明显的增殖抑制现象.免疫组化SABC染色法可见C6用药组较对照组GFAP表达明显增强.结论苦参碱对鼠胶质瘤C6细胞系的增殖有明显的抑制作用,发生了诱导分化现象.     

人脑胶质瘤中cyclin E的表达及其对细胞增殖活性的影响

目的研究人脑胶质瘤中细胞周期素E(cyclin E)表达与胶质瘤细胞恶性程度及细胞增殖活性的关系.方法采用免疫组化方法检测52例人脑胶质瘤和8例正常脑组织标本中cyclin E和增殖细胞核抗原(PCNA)的表达水平,观察并分析各病理等级中两者表达的阳性率和标记指数.结果正常脑组织中无cyclin E或PCNA表达.随着人脑胶质瘤病理分级的增高,cyclin E的阳性率和平均标记指数均明显升高,在高、低度恶性度肿瘤之间也存在明显差异(P<0.05).双元相关性分析发现cyclin E与PCNA的平均标记指数呈明显正相关(Pearson相关系数r=0.576,P<0.01).结论人脑胶质瘤中cyclin E的表达与细胞增殖活性和病理学分级关系密切,很可能对肿瘤细胞的增殖和恶性转化产生重要的推动作用.     

帕金森病相关致病基因的研究进展

近年来，帕金森病(PD)的遗传学研究取得了较大的进展，迄今为止已经确定了PARK1-PARK10等10个单基因与PD的发生有关。其中三个基因产物与家族性PD有关，它们分别是a-synuclein(PARK1)、parkin(PARK2)和泛素蛋白C末端羟化酶-L1(PARK5)，它们均参与Lewy小体．的形成，在PD的发病过程中扮演重要的角色。虽然另外几个基因对应的蛋白或对应蛋白的功能未知，但已经在染色体上找到相应的位置。PD遗传学的研究将有助于PD的早期诊断．并且有可能为PD的治疗提供新的靶点。本文概述了PD相关基因的最新研究进展。     

第三届国际口腔粘接技术大会简报

由中华口腔医学会主办,第四军医大学口腔医学院承办的第三届国际口腔粘接技术大会于2008年9月26至28日在西安隆重召开.     

Risk factors associated with the dramatic increase in the prevalence of diabetes in the adult Chinese population in Qingdao,China

Objective To investigate the major risk factors and their association with the dramatic increase in the prevalence of diabetes from 2001–2002 to 2006 in Qingdao, China. Methods Population‐based cross‐sectional studies on diabetes were performed in 4598 men and 7026 women aged 35–74 years. The 2006 World Health Organization diagnostic criteria for diabetes were used. Results The crude prevalence of diabetes was 11.3% in both men and women in urban areas and 5.3% and 8.9% in rural areas in 2001–2002. This increased to 19.2% and 16.1% in urban areas and 14.2% and 13.8% in rural areas in 2006 for men and women, respectively. The increase in diabetes prevalence from 2001–2002 to 2006 was paralleled by an increased body mass index in rural areas but not in urban areas. The major risk factors associated with diabetes were age, family history of diabetes, obesity, hypertension and high triglycerides. The multivariate adjusted odds ratio and 95% confidence interval for diabetes corresponding to a one standard deviation increase in waist circumference was 1.81 (1.47, 2.23) in urban men, 1.64 (1.26, 2.13) in rural men, 1.98 (1.66, 2.37) in urban women and 2.02 (1.63, 2.51) in rural women. Low socio‐economic classes had a higher risk for diabetes in urban areas but a lower risk in rural areas, both associated with increased waist circumference. Conclusion Established risk factors are of great importance for the prevalence of diabetes in the urban and rural Chinese populations and changes in these factors could explain the recent dramatic increase in diabetes prevalence, particularly in rural areas. Considering the high prevalence of obesity and physical inactivity, intervention is urgently required in China.     

Antiviral therapy for hepatitis B virus associated hepatic failure

BACKGROUND:Chronic hepatitis B virus(HBV)infection remains a major global health issue,and the prognosis of patients with HBV-associated fulminant hepatic failure is extremely poor.The application of antiviral therapies has led to significant improvements in patient outcomes.This article aimed to review the current strategies in antiviral treatment of HBV-associated fulminant hepatic failure. DATA SOURCES:Literature search was conducted using PubMed on the related subjects.Part of the data was from the most...     

Nonagenarian Siblings and Their Offspring Display Lower Risk of Mortality and Morbidity than Sporadic Nonagenarians: The Leiden Longevity Study

OBJECTIVES: To compare the risk of mortality of nonagenarian siblings with that of sporadic nonagenarians (not selected on having a nonagenarian sibling) and to compare the prevalence of morbidity in their offspring with that of the offsprings' partners.
DESIGN: Longitudinal (mortality risk) and cross-sectional (disease prevalence).
SETTING: Nationwide sample.
PARTICIPANTS: The Leiden Longevity Study consists of 991 nonagenarian siblings derived from 420 Caucasian families, 1,365 of their offspring, and 621 of the offsprings' partners. In the Leiden 85-plus Study, 599 subjects aged 85 were included, of whom 275 attained the age of 90 (sporadic nonagenarians).
MEASUREMENTS: All nonagenarian siblings and sporadic nonagenarians were followed for mortality (with a mean±standard deviation follow-up time of 2.7±1.4 years and 3.0±1.5 years, respectively). Information on medical history and medication use was collected for offspring and their partners.
RESULTS: Nonagenarian siblings had a 41% lower risk of mortality ( P <.001) than sporadic nonagenarians. The offspring of nonagenarian siblings had a lower prevalence of myocardial infarction (2.4% vs 4.1%, P =.03), hypertension (23.0% vs 27.5%, P =.01), diabetes mellitus (4.4% vs 7.6%, P =.004), and use of cardiovascular medication (23.0% vs 28.9%, P =.003) than their partners.
CONCLUSION: The lower mortality rate of nonagenarian siblings and lower prevalence of morbidity in their middle-aged offspring reinforce the notion that resilience against disease and death have similar underlying biology that is determined by genetic or familial factors.