国外图书馆生物医学科研数据管理服务及启示

通过调研印第安纳大学图书馆和马萨诸塞大学图书馆的科研数据管理的服务模式,对比分析了科研数据管理服务工作的内容、方法、工具等提出了我国图书馆科研数据管理服务模式的设想。     

Shenfu Injection(参附注射液) Suppresses Inflammation by Targeting Haptoglobin and Pentraxin 3 in Rats with Chronic Ischemic Heart Failure

Objective:To investigate the regulatory effects of Shenfu Injection(SFI,参附注射液) on hemodynamic parameters and serum proteins in rats with post-infarction chronic heart failure(CHF).Methods:Forty-five healthy Wistar rats were randomized into three groups:sham,heart failure(model) and SFI group.The CHF was induced by left coronary artery ligation.Seven days after the surgical operation,animals in the sham group and the model group received saline(6.2 mL/kg/d),while animals in the SFI group received SFI(6.2 mL/kg·d) intraperitoneally.Four weeks later,cardiac hemodynamic parameters were measured via the carotid route.The expression of serum proteins was analyzed by two-dimensional electrophoresis and matrixassisted laser desorption/ionization time-of-flight mass spectrometer(MALDI-TOF MS).Results:Recording of hemodynamic parameters showed that left ventricular systolic pressure(LVSP),maximum rate of left ventricular pressure(+dp/dt_(max)) rise,and maximum rate of left ventricular pressure(-dp/dt_(max)) decrease,while the left ventricular end diastolic pressure(LVEDP) rose in the model group compared to those in the sham group(P0.05).The results of the MALDI-TOF MS indicated that haptoglobin(HP),pentraxin 3(PTX3) and alpha-1-antitrypsin were up-regulated,while serum albumin and 40 S ribosomal protein were down-regulated in the model group(P0.05).Compared with the model group,LVSP,+dp/dt_(max)and-dp/dt_(max) were higher,while LVEDP was lower in the SFI group(P0.05).Expression levels of HP and PTX3 were lower than in the model group(P0.05).Conclusion:SFI could improve hemodynamic function and decrease inflammatory reactions in the pathophysiology of CHF.The serum proteins HP and PTX3 could be potential biomarkers for chronic ischemic heart failure,and they could also be the serum protein targets of SFI.     

Association of serum uric acid with mortality and cardiovascular outcomes in patients with hypertension: a meta-analysis

Journal of Thrombosis and Thrombolysis - Studies on the association of uric acid with mortality and cardiovascular outcomes in patients with hypertension have produced contradictory results. The...     

Prediction of early recurrence of hepatocellular carcinoma after liver transplantation based on computed tomography radiomics nomogram

BackgroundEarly recurrence results in poor prognosis of patients with hepatocellular carcinoma (HCC) after liver transplantation (LT). This study aimed to explore the value of computed tomography (CT)-based radiomics nomogram in predicting early recurrence of patients with HCC after LT.MethodsA cohort of 151 patients with HCC who underwent LT between December 2013 and July 2019 were retrospectively enrolled. A total of 1218 features were extracted from enhanced CT images. The least absolute shrinkage and selection operator algorithm (LASSO) logistic regression was used for dimension reduction and radiomics signature building. The clinical model was constructed after the analysis of clinical factors, and the nomogram was constructed by introducing the radiomics signature into the clinical model. The predictive performance and clinical usefulness of the three models were evaluated using receiver operating characteristic (ROC) curve analysis and decision curve analysis (DCA), respectively. Calibration curves were plotted to assess the calibration of the nomogram.ResultsThere were significant differences in radiomics signature among early recurrence patients and non-early recurrence patients in the training cohort (P < 0.001) and validation cohort (P < 0.001). The nomogram showed the best predictive performance, with the largest area under the ROC curve in the training (0.882) and validation (0.917) cohorts. Hosmer-Lemeshow testing confirmed that the nomogram showed good calibration in the training (P = 0.138) and validation (P = 0.396) cohorts. DCA showed if the threshold probability is within 0.06-1, the nomogram had better clinical usefulness than the clinical model.ConclusionsOur CT-based radiomics nomogram can preoperatively predict the risk of early recurrence in patients with HCC after LT.     

Cloning and identification of NS5ATP2 gene and its spliced variant transactivated by hepatitis C virus non-structural protein 5A

AIM: To clone, identify and study new NS5ATP2 gene and its spliced variant transactivated by hepatitis C virus non-structural protein 5A. METHODS: On the basis of subtractive cDNA library of genes transactivated by NS5A protein of hepatitis C virus, the coding sequence of new gene and its spliced variant were obtained by bioinformatics method. Polymerase chain reaction (PCR) was conducted to amplify NS5ATP2 gene. RESULTS: The coding sequence of a new gene and its spliced variant were cloned and identified successfully. CONCLUSION: A new gene has been recognized as the new target transactivated by HCV NS5A protein. These results brought some new clues for studying the biological functions of new genes and pathogenesis of the viral proteins.     

重症急性呼吸综合征患者中重症者早期预警指标研究

目的　探讨重症急性呼吸综合征 (SARS)患者中与重症发生相关的危险因素 ,寻找发生重症的早期预警指标。方法　对北京市SARS临床诊断病例数据库中转院资料完整 ,且在 2周内发生重症的 35 5例和始终未发生重症的 84 1例SARS患者进行单因素和多因素分析。结果　高龄、有基础病的患者发生重症的危险性明显增加。重症患者发生重症前表现出以下特点 :体温下降缓慢、脉搏加快、淋巴细胞计数持续 <0 9× 10 9/L、中性粒细胞高于 7 1× 10 9/L(80 % )、X线胸片异常进展较快等。采用Cox多元逐步回归发现 ,具有统计学显著性的早期预警重症发生的独立因素包括 :年龄偏大、有基础疾病、住院 2d后体温仍不能降至正常、住院 3d后中性粒细胞比值持续在 80 %以上、住院 4d后淋巴细胞计数仍持续 <0 9× 10 9/L和病程中出现脉搏持续加快达到 10 0次 /min。结论　根据SARS患者的年龄和基础病情况 ,结合临床对体温、脉搏、淋巴细胞绝对值以及中性粒细胞绝对值 (百分比 )的密切观察能够对重症SARS的发生进行早期预警。     

从1例肾移植患者术后感染HIV论手术医师预防HIV感染

目的预防医院手术人员感染HIV/AIDS.方法术前用ELISA和WB对患者进行HIV抗体检测,在手术期加强医务人员预防HIV感染的意识和防护措施.加强对患者的检测及保密原则.结果手术医师及护理人员未感染HIV.其预防HIV感染的意识得到加强.结论采用上述方法,即"普通防护原则",可以预防临床医务人员感染HIV,应在医院,尤其是手术科室广泛采用.     

丙型肝炎病毒非结构蛋白5A反式激活基因8的克隆化研究

目的 丙型肝炎病毒(HCV)的非结构蛋白5A(NS5A)是一种具有显著反式激活作用的病毒蛋白质。为了探索HCV NS5A病毒蛋白反式激活作用的新的靶基因，我们应用抑制性消减杂交(SSH)技术对于转染和未转染的肝母细胞瘤细胞系HepG2进行分析。研究结果将有助于阐明HCV感染相关疾病的发病机制。方法 以HCV NSSA表达质粒peDNA3．1(-)-NSSA转染HepG2细胞，以空载体pcDNA3．1(-)为平行对照，提取mRNA并进行SSH分析。对于所获基因片段序列分析表明，其中之一为新型基因片段，与GenBank中注册的已知功能基因序列没有同源性，利用表达序列标签(EST)序列的搜索和比对，进行电子拼接。根据基因起始密码子的Kozak规则和终止密码子下游保守的多聚腺苷酸信号序列，确定新型基因序列。结果 结果从HepG2细胞提取总RNA，多聚酶链反应(RT-PCR)技术扩增获得该新基因的全长序列，测序证实，命名为NSSATP8在GenBank中注册，注册号为．AF529369.NSSATP8基因的编码序列全长为1449(nt)，编码产物由483个氨基酸残基(aa)组成。结论 HCV NS5A反式激活新型靶基因NSSATP8筛选与克隆，进一步研究HCV NS5A反式激活作用的分子生物学机制和探索新型治疗技术奠定基础。     

Detection and identification of intestinal pathogenic bacteria by hybridization to oligonucleotide microarrays

AIM: To detect the common intestinal pathogenic bacteria quickly and accurately. METHODS: A rapid (<3 h) experimental procedure was set up based upon the gene chip technology. Target genes were amplified and hybridized by oligonucleotide microarrays. RESULTS: One hundred and seventy strains of bacteria in pure culture belonging to 11 genera were successfully discriminated under comparatively same conditions, and a series of specific hybridization maps corresponding to each kind of bacteria were obtained. When this method was applied to 26 divided cultures, 25 (96.2%) were identified. CONCLUSION: Salmonella sp., Escherichia coli, Shigella sp., Listeria monocytogenes, Vibrio parahaemolyticus, Staphylococcus aureus, Proteus sp., Bacillus cereus, Vibrio choterae, Enterococcus faecalis, Yersinia enterocolitica, and Campylobacter jejuni can be detected and identified by our microarrays. The accuracy, range, and discrimination power of this assay can be continually improved by adding further oligonucleotides to the arrays without any significant increase of complexity or cost.     

SLIPA喉罩在不同年龄患者膀胱镜手术中的应用效果

 目的 探索免充气型喉上通气道(SLIPA)喉罩在不同年龄患者膀胱镜手术中应用的安全性及有效性。方法 选择2019-9至2019-11解放军总医院第一医学中心行膀胱镜手术患者100例,分为老年组(n=50)与非老年组(n=50)。比较两组患者不同时间点时平均血压(MBP)、心率(HR)以及喉罩漏气、更换喉罩、喉罩染血及术后咽痛、声嘶的发生情况。结果 老年组和非老年组患者使用SLIPA喉罩的即时MBP[ 插入时(87.8±11.7)mmHg vs.(87.2±13.6)mmHg;拔除后(94.0±10.8)mmHg vs.(89.2±14.9)mmHg ]和即时HR[插入时(65.0±9.88)次/min vs.(72.5±12.4)次/min;拔出时(76.4±10.0)次/min vs.(81.6±9.39)次/min] 差异无统计学意义(P>0.05);两组患者喉罩漏气情况、拔除喉罩后声嘶、染血、咽痛进行对比差异无统计学意义(P>0.05);老年组8例患者经3次及以上的尝试后才成功插入喉罩,3次及以上的尝试率较非老年组高(16% vs. 0%),差异有统计学意义(P<0.05)。结论 SLIPA喉罩适用于不同年龄患者膀胱镜手术全麻中的气道管理,可降低插管和拔管过程中强烈的应激反应。