空肠弯曲菌全菌灭活疫苗免疫鸡效果评价北大核心CSCD

目的拟研制一种可降低空肠弯曲菌在鸡肠道内定植的全菌灭活疫苗。方法利用一种新的灭活剂H;O;与CuCl;混合物灭活空肠弯曲菌制备油佐剂灭活疫苗,免疫SPF鸡后测定灭活疫苗诱导产生的特异性抗体水平,通过口服攻毒评价疫苗免疫对空肠弯曲菌在鸡盲肠内定植的影响,同时测定盲肠细胞因子在转录水平的变化,以及对盲肠绒毛长度和隐窝深度的影响。结果制备的全菌灭活疫苗免疫SPF鸡后可诱导产生特异性血清IgG和胆汁IgA,但口服攻毒后不能抑制或降低空肠弯曲菌在盲肠内的定植水平,且对免疫鸡的盲肠绒毛长度和隐窝深度无明显影响。测定的鸡盲肠中多数细胞因子在空肠弯曲菌攻毒前与攻毒后1 d的转录水平差异不明显,而在攻毒后10 d明显上升;同日龄样品比较结果显示,部分细胞因子的表达量在佐剂对照组和全菌免疫组较空白对照组明显上调。结论本试验研制的全菌灭活疫苗虽可诱导产生高水平特异性抗体,但不能降低空肠弯曲菌在鸡盲肠内的定植水平,提示空肠弯曲菌在鸡盲肠内的定植机制需深入探究。     

阴道炎五联检验对阴道炎病原体诊断与白带清洁度检测的应用效果分析

目的观察和分析阴道炎五联检验对阴道炎病原体诊断与白带清洁度检测的应用效果。方法选择门诊接受阴道分泌物检查的患者260例作为研究对象,提取患者阴道分泌物标本分别进行阴道炎五联检测和常规镜检,对两种方法检测真菌性阴道炎、滴虫性阴道炎、细菌性阴道炎和白带清洁度的结果进行比较和分析。结果常规镜检法和阴道五联检法检测真菌性阴道炎、滴虫性阴道炎、白带清洁度结果的总符合率分别为95.8%、97.7%和83.8%,两种方法的检出率差异无统计学意义,而两种方法检测细菌性阴道炎结果的总符合率为85.0%,阴道五联检法检出率显著高于常规镜检法(χ2=16.058,P<0.05)。结论阴道炎五联检测法可提高细菌性阴道炎的检出率,具有较高的灵敏度和特异度,可为临床医师制定合理的治疗方案提供有价值的依据。     

深圳市隐性手足口病感染情况

目的分析深圳市隐性手足口病流行特征和感染高危因素,为隐性手足口病感染的预防和控制措施的制定提供参考依据。方法采集2011—2013年深圳市某区未患手足口病儿童肛拭子4 352份样本,采用RT-PCR方法对所有样本进行核酸检测;同时对所有儿童进行了问卷调查,并对结果进行单因素和多因素回归分析。结果 4 352份样本的核酸检测结果为:隐性手足口携带率为4.34%(189例),其中肠道病毒71型(EV71)159例,阳性率为3.65%;柯萨奇病毒A16(Cox A16)30例,阳性率为0.69%。多因素条件logistics回归分析发现,年龄(OR=1.907、性别(OR=1.959)、职业(OR=4.366)、家庭或班级拥挤程度(OR=2.759)、家庭儿童个数(OR=1.710)等为手足口病感染独立危险因素。结论该地区隐性手足口病以EV71病毒感染为主;年龄、性别、职业、家庭或班级拥挤程度、家庭儿童个数等是手足口病隐性感染的高危因素。     

64排螺旋CT血管造影和冠状动脉造影诊断冠心病的临床比较

目的 :对比分析CT血管成像(computed tomography angiography,CTA)与数字减影血管造影(digital subtraction angiography,DSA)成像,探讨64排螺旋CT冠状动脉成像技术在冠心病临床诊断中的价值。方法 :随机选取32例疑似或确诊为冠心病的住院患者,进行CTA及DSA检查(CTA检查均在DSA前1周内完成),对结果进行对比分析。结果:共分析了32例患者的全部血管节段(243个),DSA检测到病变节段138处,无病变节段105处,CTA检测到病变节段129处,无病变节段114处;CTA诊断冠状动脉狭窄的敏感性为91.3%,特异性为97.1%,阳性预测值为97.7%,阴性预测值为89.5%,准确率为93.8%;CTA检查发现59支冠状动脉血管有斑块,DSA检查发现62支有斑块,二者之间比较无显著性差异;CTA与DSA对狭窄程度<50%、50%~75%、>75%的所有部位病变的检出数目分别为18、24处,35、32处,6、6处,二者比较均无显著性差异。结论 :64排螺旋CT冠状动脉成像技术对冠状动脉狭窄的诊断较为准确,是诊断冠心病和评价冠状动脉狭窄的一种有效的无创性检查方法。     

中国农民工艾滋病态度行为干预效果的Meta分析

目的评价农民工群体艾滋病相关态度行为干预效果,为更好的在该人群开展相关健康教育提供理论依据。方法全面检索并按照严格的纳入和排除标准选择文献,进行Meta分析。结果健康干预后,农民工对"愿意与患艾滋病的亲友继续交往"、"最近半年使用安全套"的正向回答率分别提高了16%和23%。结论目前针对农民工艾滋病态度行为的干预效果较好。     

联合检测抑制素A、CA125与CA153在卵巢癌中的表达及临床意义

目的探讨联合检测血清抑制素A(INH-A)、CA125与CA153水平对卵巢癌早期诊断的价值。方法采用全自动化学发光免疫分析法(CLIA)检测卵巢癌组40例,卵巢良性疾病组30例,对照组30名健康女性的血清INH-A、CA125与CA153水平。结果卵巢癌组血清INH-A、CA125与CA153水平明显高于卵巢癌组和卵巢良性疾病组,差异有统计学意义(P<0.05);三项标志物的阳性率分别为52.5%,60.0%,72.5%,三项联合检测的阳性率为82.5%。卵巢癌组血清INH-A水平高于卵巢良性疾病组和对照组,提示INH-A异常表达可能与卵巢癌的发生密切相关。结论 INH-A可能作为诊断卵巢癌的一项肿瘤标志物,联合检测有助于早期诊断卵巢癌以及病情监测。     

静脉联合鞘内或脑室内注射多黏菌素对多重耐药鲍曼不动杆菌#br# 颅内感染疗效及安全性Meta分析

目的 系统评价多黏菌素静脉联合鞘内或脑室内注射对多重耐药鲍曼不动杆菌的疗效及安全性。方法 计算机检索PubMed、Embase、CNKI、VIP、万方数据库等数据库,检索时间为建库至2019年6月,筛选有关多黏菌素静脉联合鞘内或脑室内给药治疗多重耐药鲍曼不动杆菌感染的文献,采用RevMan 5.3软件对提取的数据进行Meta分析。结果 纳入7篇文献、178例患者。Meta分析结果显示,静脉联合鞘内或脑室内组的临床死亡率(OR=0.18, 95%CI：0.09~0.37, P＜0.00001)低于静脉组、细菌清除率(OR=20.40, 95%CI：5.94~70.12, P＜0.00001)高于静脉组;两组不良反应发生率无统计学差异(OR=0.60, 95%CI: 0.16~2.23, P=0.44)。结论 多黏菌素静脉联合鞘内或脑室内给药治疗多重耐药鲍曼不动杆菌颅内感染疗效优于静脉滴注,安全性无显著差异。     

急性和慢性髓性白血病细胞中可变剪接事件的识别

目的：为揭示异常的可变剪接在肿瘤中发挥的作用,着重研究急性髓性白血病（ AML）与慢性髓性白血病（CML）内显著差异的可变剪接事件以及剪接异构体。方法基于CML（K562）和AML（THP1、HL－60）细胞系的全转录组测序数据,在全基因组范围内采用TopHat、MATS和Cufflinks计算识别可变剪接事件、重构剪接异构体和分析其差异表达。结果在AML和CML细胞间识别的130个基因在CML细胞系中特异性高表达,80个基因在AML两株细胞系内均表达上调。在CML与AML之间识别了337个差异表达的剪接异构体以及35个差异可变剪接事件。结论 AML与CML细胞系间存在显著差异的可变剪接事件和剪接异构体。白血病相关的可变剪接事件可作为其潜在的标志物或药物靶标。     

Effects of cilostazol on the progression and regression of symptomatic intracranial artery stenosis:it reduces the risk of ischemic stroke

OBJECTIVE: To assess the efficacy and safety of cilostazol on the progression and regression of symptomatic intracranial artery stenosis.DATA RETRIVAL: We searched the main databases for eligible trials including Medline(from 1966 to June 2014), Embase(from 1980 to June 2014), Cochrane Library(Issue 6, 2014), Chinese National Knowledge Infrastructure(from 1995 to June 2014), Current Controlled Trials(http://controlled-trials.com), Clinical Trials.gov(http://clinicaltrials.gov), and Chinese Clinical Trial Registry(http://www.chictr.org). All studies regarding prevention and treatment of symptomatic intracranial arterial stenosis by cilostazol were collected. The Mesh or text keywords were the English words: "cilostazol, phosphodiesterase 3 inhibitor, atherosclerosis, and ischemic stroke." No restrictions were put on publications or publication language.SELECTION CRITERIA: Grade A or B randomized controlled trials were selected according to the quality of evaluation criteria from the Cochrane Collaboration, in which cilostazol and aspirin were used to evaluate the effects of cilostazol in the treatment of patients with symptomatic intracranial artery stenosis. The quality of study methodology was evaluated based on criteria described in Cochrane Reviewer's Handbook 5.0.1. Rev Man 5.2 software was used for data analysis.MAIN OUTCOME MEASURES: Clinical efficacy and safety of cilostazol in stopping progression and promoting regression of symptomatic intracranial artery stenosis were measured by magnetic resonance angiography and transcranial Doppler.RESULTS: Two randomized controlled trials with a total of 203 patients were included in this study. The results showed that while cilostazol was associated with a significantly reduced progression of intracranial artery stenosis(OR = 0.21, 95%CI: 0.09–0.47, P 0.01), it had no beneficial effect on symptom regression(OR = 1.42, 95%CI: 0.80–2.51, P = 0.24). During the follow-up period, although some adverse effects developed, including headache, gastrointestinal disturbance, and dizziness, incidences of bleeding were lower than in aspirin-treated patients.CONCLUSION: Cilostazol may prevent the progression of symptomatic intracranial artery stenosis, which could reduce the incidence of ischemic stroke.     

Neuroprotective effect of interleukin-6 regulation of voltage-gated Na~+ channels of cortical neurons is time-and dose-dependent

Interleukin-6 has been shown to be involved in nerve injury and nerve regeneration, but the effects of long-term administration of high concentrations of interleukin-6 on neurons in the central nervous system is poorly understood. This study investigated the effects of 24 hour exposure of interleukin-6 on cortical neurons at various concentrations(0.1, 1, 5 and 10 ng/m L) and the effects of 10 ng/m L interleukin-6 exposure to cortical neurons for various durations(2, 4, 8, 24 and 48 hours) by studying voltage-gated Na+ channels using a patch-clamp technique. Voltage-clamp recording results demonstrated that interleukin-6 suppressed Na+ currents through its receptor in a time- and dose-dependent manner, but did not alter voltage-dependent activation and inactivation. Current-clamp recording results were consistent with voltage-clamp recording results. Interleukin-6 reduced the action potential amplitude of cortical neurons, but did not change the action potential threshold. The regulation of voltage-gated Na+ channels in rat cortical neurons by interleukin-6 is time- and dose-dependent.