Telmisartan attenuates kidney apoptosis and autophagy-related protein expression levels in an intermittent hypoxia mouse model

Sleep and Breathing - Obstructive sleep apnea (OSA) is associated with renal impairs. As a novel pathophysiological hallmark of OSA, chronic intermittent hypoxia (CIH) enhances apoptosis and...     

Polymorphisms of HLA-A and HLA-B genes in genetic susceptibility to esophageal carcinoma in Chaoshan Han Chinese

Esophageal carcinoma (EC) occurs at high rate in Chaoshan region of southern China. Human leukocyte antigen (HLA) polymorphism has been implicated in risk for various cancers. To investigate the impact of HLA-A and HLA-B polymorphisms on susceptibility to EC, a case–control study was conducted among 206 patients with esophageal squamous cell carcinoma and 524 controls from Chaoshan Han population. HLA-A and HLA-B polymorphisms were genotyped by polymerase chain reaction-sequence-specific primers. Genotypic association tests for dominant, recessive, and additive models, and haplotypic association were calculated using unconditional logistic regression. A*11 was identified in a recessive model as an only allele strongly associated with EC risk (odds ratios [OR]= 2.10, 95% confidence interval [CI]= 1.33–3.31) even after correction for multiple test. The haplotypes A*02-B*46 (OR = 1.53, 95% CI = 1.04–2.24) and A*11-B*51 (OR = 2.29, 95% CI = 1.20–4.40) showed association with increased risk for EC, whereas A*11-B*58 (OR = 0.00, 95% CI = 0.00–0.82) was associated with decreased risk, though the significance of these haplotypes was lost after correction. This is a first association study at genetic level identifying HLA-A and HLA-B-related variations in genetic susceptibility to EC among Chaoshan population. The variation pattern is likely to be EC-specific because it is different from that observed for nasopharyngeal carcinoma in the same study population and might, at least in part, explain the high rate of EC in this ethnic group.     

针刺对高脂大鼠主动脉脂联素受体基因表达的影响

目的探讨AdipoR的不同亚型在高脂饮食机体主动脉表达的变化以及针刺对该变化的影响。方法将高脂喂养12周的SD大鼠检测血脂、一氧化氮(NO)和髓过氧化物酶(MPO),根据体重随机分为模型和针刺组,干预4周后检测血脂、NO、MPO、主动脉AdipoR1和AdipoR2基因表达,并设普食对照组。结果干预前,与对照组比较,模型组和针刺组大鼠TG、TC、MPO明显升高,NO明显降低。干预后,模型组TG、TC、MPO、NO无明显变化,主动脉AdipoR1和AdipoR2基因表达明显降低;针刺后TG、TC和MPO明显降低,NO明显回升,主动脉AdipoR2基因表达明显上调,AdipoR1基因表达无明显变化。结论高脂饮食造成机体主动脉AdipoR1和AdipoR2基因表达低下,影响了脂联素信号对主动脉的保护作用;针刺能够上调脂联素信号保护高脂对主动脉的损伤,其作用主要通过AdipoR2介导的。     

Identification of novel antigens within the Schistosoma japonicum tetraspanin family based on molecular characterization

Tetraspanins (TSPs) are proteins found on the surface of the parasite Schistosoma mansoni that have been regarded as potential protective antigens. However, divergent evolution may occur among the species of S. mansoni and Schistosoma japonicum under different environmental pressure. Thus, it was essential to characterize the S. japonicum TSP family members before selecting potential candidate TSP antigens. In this study, we used bioinformatics and experimental validation to investigate 29 TSP members from S. japonicum, including all known genes, Sj23, TE736, Sj25, and Sj-TSP-2. Five TSP members were found to be variable, and two others (Sj-tsp genes) were alternatively spliced. The phylogenetic analysis showed that schistosome TSPs were highly divergent from those of other phyla. Quantitative RT-PCR revealed that the Sj-tsp genes were differentially transcribed in the developmental stages of cercariae, schistosomula, adult worms, and eggs. Six Sj-tsp genes were significantly up-regulated during the transformation from cercariae to schistosomula. Four Sj-tsp genes, including Sj-tsp-1, Sj-tsp-8, Sj-tsp-14, and Sj-tsp-26 were confirmed as potential protective antigens based on the molecular characterization. RNAi was preformed against the conserved Sj-tsp genes which were highly expressed in schistosomula to explore gene functions. These data will promote the identification of candidate antigens within the TSP family for developing novel vaccines against S. japonicum infections.     

肝纤维化血清学诊断指标谱的初步探讨—附612例慢性肝病患者11项血清学检测结果分析

对慢迁肝、慢活肝、肝炎后肝硬化、日本血吸虫病早期和晚期患者共612例(其中157例经肝活检确诊)进行血清ADA、CG、β_2-M、NAG、GST、HyP、PIP、HA、LN、TNF-α、sIL-2R等11项指标的检测.检测结果用阳性(>(?) 2SD)率表示,大致与肝组织学检查结果相似,肝纤维化程度早血、迁肝<晚血<慢活肝<肝炎后肝硬化,而肝脏炎症、坏死则以慢活肝为重.我们认为肝纤维化的诊断应综合考虑.本文从反映慢性肝受损指标、细胞外间质代谢指标及细胞因子网络失调指标3方面,初步提出肝纤维化血清学诊断指标谱,供讨论。     

慢性支气管炎患者肺泡巨噬细胞及诱导痰中内皮素的研究

目的研究慢性支气管炎(慢支炎)患者诱导痰中、肺泡巨噬细胞(AM)培养上清液中及在氨茶碱和脂多糖(LPS)干预下培养上清液中内皮素(ET)的浓度变化,探讨AM源性ET在慢支炎及慢性阻塞性肺疾病(COPD)病理进展过程中的作用.方法选择慢支炎患者14例,COPD患者13例,同时选择14名健康人作为正常对照.支气管肺泡灌洗技术收集支气管肺泡灌洗液(BALF),对其细胞成分进行计数和分类;对其中26例用高渗盐水诱痰法取痰标本,放射免疫法测定诱导痰中和AM培养上清液中的ET浓度.结果(1)慢支炎组、COPD组BALF中细胞总数、中性粒细胞数、肺泡巨噬细胞数均明显高于正常对照组(P均<0.01);(2)慢支炎组和COPD组AM培养上清液中ET浓度和诱导痰中ET浓度明显高于正常对照组(P均<0.01),但慢支炎组与COPD组之间差异无显著性(P均>0.05);(3)三组的诱导痰ET浓度与AM培养上清液ET浓度呈正相关(r=0.741,P<0.01),与AM数呈正相关(r=0.597,P<0.01);(4)COPD组AM培养上清液ET浓度、诱导痰ET浓度均与一秒钟用力呼气容积占预计值%(FEV1占预计值%)呈负相关(r=-0.828,P<0.01;r=-0.748,P<0.05);(5)氨茶碱对AM培养上清液中ET浓度无影响(P>0.05),而LPS使其浓度明显升高(P<0.01).结论(1)慢支炎、COPD患者气道腔内存在非特异性气道炎症,其特点表现为中性粒细胞和巨噬细胞数目增多;(2)AM为肺内ET的重要来源之一,LPS可刺激AM分泌ET,AM源性ET可能参与了COPD阻塞性通气功能障碍的病理进展过程.     

SELDI-TOF-MS联合蛋白质组学实验数据库对结直肠癌血清标志物的鉴定

目的:探讨表面增强激光解析离子化飞行时间质谱仪(SELDI-TOF-MS)联合蛋白质组学实验数据库方法研究结直肠癌患者血清标志物的可行性.方法:应用SELDI-TOF-MS对169例结直肠癌患者与83例正常人血清进行了蛋白质谱检测.通过Biomarker WizardTM与BiomarkerPatternsTM软件分析发现差异蛋白,建立结直肠癌诊断模型;用蛋白质组学实验数据库检索鉴定出有意义的差异蛋白,并用ELISA法对结直肠癌患者及正常人血清样本中差异蛋白表达进行验证.结果:发现34种差异蛋白,以质荷比(m/z)为2873,3163,6121,7778的4种差异蛋白组成的分类树诊断模型.在学习模式下其诊断结直肠癌的灵敏度为91.57%,特异度为90.53%:在测试模式下分别为82.25%.80.72%.其中m/z为7778的蛋白峰强度在结直肠癌患者血清中明显高于正常人(p<0.01),数据库检索结果提示该蛋白为血小板因子4(PF4).ELISA法测定结直肠癌患者血清PF4水平显著高于正常人(p<0.01),其灵敏度及特异度分别为61.1%,76.9%.结论:SELDI-TOF-MS联合蛋白质组学实验数据库的方法简便可行.可为蛋白芯片研究提供新思路;PF4(m/z=7778)在结直肠癌患者血清中明显升高,是结直肠癌患者新的血清学标志物.     

武汉市7区血吸虫病疫情控制和传播控制达标考核

目的对武汉市7个区进行血吸虫病疫情控制和传播控制达标考核。方法按照《血吸虫病控制和消灭标准》,对武汉市洪山、蔡甸、汉南、黄陂、江夏、东西湖、江岸7个疫情未控制区开展人畜查病和螺情调查。结果洪山、蔡甸、汉南、黄陂、江夏5个疫情控制考核区居民血吸虫感染率为0～1.58%,耕牛血吸虫感染率为0～2.74%;东西湖、江岸2个传播控制考核区血检阳性率分别为3.47%和1.71%,粪检未查到阳性病人及阳性耕牛。2个传播控制考核区所抽取的螺点均无感染性钉螺。结论2007年武汉市洪山、蔡甸、汉南、黄陂、江夏5区各项疫情指标已达血吸虫病疫情控制标准,东西湖、江岸2区已达血吸虫病传播控制标准。     

湘北水上作业人员粪便管理及血吸虫感染调查

目的了解湖南省华容县境内长江、洞庭湖等水域船舶粪便管理状况及船上作业人员血吸虫感染情况。方法采用问卷调查方法,对船只数量、粪便排放设施及船只停靠地周边环境进行现场调查。采用间接血凝试验（IHA）对船上作业人员进行血吸虫病筛查,阳性者采用Kato-Katz法（1粪3检）确诊。结果共调查船只579只,无厕所者占88.77%,有厕所但无底者占11.23%;调查49个船只停靠点,均无公厕,32个停靠点有钉螺分布;调查船员511人,愿意在船上安装粪便设施者占18.40%,愿意使用马桶者占62.04%,使用马桶后愿意将粪便送上岸倒入公厕者占97.26%。人群血吸虫感染率为3.04%,不同作业方式人群血吸虫感染率差异有统计学意义（χ2=15.10,P〈0.01）。结论湖南省华容县水上流动船只缺乏粪管设施,渔船民粪便大多直接入水。船上作业人员血吸虫感染率高于当地居民平均感染率,水上流动人群传染源管理极为迫切。