抗人C1—抑制物单链抗体的构建

由一株抗人Ｃ１－抑物单克隆抗体鼠杂交瘤细胞提取总ＲＮＡ，合成２对与免疫蛋白可变区ＦＲ１和ＦＲ４互补的通用引物，经ＲＴ－ＰＣＲ扩增出抗体的重链可变区和轻链可变区基因。     

Effects of scopolamine on variable intertrial interval spatial alternation and memory in the rat

A repeated measures procedure, variable intertrial interval (ITI) spatial alternation, was used to assess scopolamine effects on memory, and to compare effects of the drug on discrimination processes with effects on storage. Rats learned in two stages to press left and right levers in alternation on discrete trials separated by 5 different ITI's ranging from 2.5 to 40 s and presented in random order during the experimental session. In the first stage, alternating discrimination, alternation was controlled by a light on over the correct lever at the time of the trial; in the second stage, variable ITI spatial alternation, a centrally located panel light signalled all trials and alternation was controlled by stimuli from prior trials (memory). Alternation response occurrence declined moderately (but significantly) with increasing ITI duration in both the alternating discrimination and variable ITI spatial alternation stages; response occurrence was also significantly decreased by scopolamine treatment in both stages. Accuracy of alternating discrimination performance was not significantly altered by either ITI duration or scopolamine treatment. Accuracy of variable ITI spatial alternation performance on a trial varied inversely with the duration of the ITI that preceded the trial. Scopolamine treatment significantly reduced accuracy of lever pressing in variable ITI spatial alternation but did not alter the slope of the curves relating accuracy to ITI duration. These effects indicate that the drug impaired discrimination processes but did not alter memory storage.     

辨证论治与变量颈椎牵引及手法联合西药治疗颈性眩晕随机平行对照研究

[目的]观察辨证论治与变量颈椎牵引及手法联合西药治疗颈性眩晕疗效。[方法]使用随机平行对照方法,将60例门诊患者按抽签法分为两组。对照组30例①5%葡萄糖氯化钠注射250mL加脉络宁20mL静滴,1次/d;尼莫地平40mg,3次/d,口服。②枕颌带坐位变量牵引,牵引质量2～10kg,(按患者体位和自我感觉有所增减)先由轻至重牵引,逐渐增至患者最大耐受限度,10～14d牵引质量再由重减轻,至病程完成。牵引时间每次10～30min,以患者能耐受为限,1次/d,14d为1疗程。③手法点、按、揉风池、百会、天柱、合谷、内关、大椎、肩贞、肩井等穴位。治疗组30例辨证论治。①肝阳上亢型,方以天麻沟藤饮加减。②气血亏虚型,方以归脾汤加减。③痰浊中阻型,方以半夏白术天麻汤加减。④肾精不足型,方以偏阳虚用右归丸加减,偏肾阴虚用左归丸加减。西医、牵引、手法治疗同对照组。连续治疗14d为1疗程。观测临床症状、不良反应。连续治疗疗程,判定疗效。[结果]治疗组临床治愈6例,显效14例,有效7例,无效3例,总有效率90.00%。对照组临床治愈2例,显效13例,有效7例,无效8例,总有效率73.33%。临床疗效治疗组优于对照组(P<0.05)。[结论]辨证论治、变量颈椎牵引及手法联合西药治疗颈性眩晕疗效满意,值得临床应用。     

13个VNTR位点用于113株结核分支杆菌的基因分型研究

目的 应用数目可变串联重复序列（VNTR）分子分型技术，对北京地区113株肺结核临床分离菌株进行分型研究，探讨北京地区菌株DNA多态性和基因型特征。方法 采用PCR和琼脂糖凝胶电泳技术对结核分支杆菌13个VNTR位点进行检测，并应用Gel-Pro analyzer 3．1软件和BioNumerics3．0软件进行结果分析。结果 113株结核分支杆菌可分为4个基因型（分别为Ⅰ、Ⅱ、Ⅳ和Ⅴ型），其中Ⅰ型占92．0％（104/113），其他3型所占比例很小，分别为Ⅱ型占4．4％（5／113），Ⅳ和Ⅴ型均为1．8％（2／113），而标准菌株H37Rv在分型中为独立的一个基因型，即Ⅲ型。结论 北京地区的结核分支杆菌存在基因多态性，其主要流行型为Ⅰ型。     

基于变异系数评价重症医学科DRG分组效能研究

目的 评价重症医学科DRG分组的效能,发现存在的问题,为DRG付费或绩效考核提供建议.方法 采用DRG分组器获得样本医院2016-2019年出院患者的分组结果.在2555名重症医学科出院患者中选取病例数排名前5位的DRG组作为DRG研究组.在351148名全院出院患者中筛选出DRG研究组的所有病例.对入组同一个DRG组...     

Comparison of a quantitative Real-Time PCR assay and droplet digital PCR for copy number analysis of the CCL4L genes

The controversy surrounding the findings that copy number variation, of the CCL3 encoding genes, influences HIV-1 infection and disease progression has been in part attributed to the variable results obtained from methods used for copy number evaluation. Like CCL3, the genes encoding the CC chemokine CCL4, also a natural ligand of the CCR5 receptor, are found to occur in population-specific multiple copy number and have been shown to play a protective role against HIV-1. This study evaluated the standard method of quantitative Real-Time PCR (qPCR) and droplet digital PCR (ddPCR) for CCL4L gene copy number determination. The CCL4 encoding genes are CCL4, occurring in two copies per diploid genome (pdg), and the non-allelic CCL4L genes, comprised of CCL4L1 and CCL4L2, which are both found in multiple copies pdg. Copy number of CCL4L, CCL4L1 and CCL4L2 was determined in a cohort of HIV-1-uninfected individuals from the South African Black (n = 23) and Caucasian (n = 32) population groups using qPCR and ddPCR. A stronger correlation between the number of CCL4L copies and the sum of CCL4L1 and CCL4L2 copies generated by ddPCR (r = 0.99, p < 0.0001) compared to qPCR (r = 0.87, p < 0.0001) was observed. Real-Time qPCR exhibited greater inaccuracy at higher copy numbers which is particularly relevant to our cohort of Black individuals who have a higher range of CCL4L copies (3–6) compared to Caucasians (0–4) and a higher population median (4 and 2, respectively). Medians and ranges of CCL4L1 (Black: 2, 0–4, Caucasian: 0, 0–2) and CCL4L2 (Black: 2, 1–5, Caucasian: 2, 0–3) were also higher in the Black population. Droplet digital PCR was shown to be a far superior method to qPCR for assessment of CCL4 gene copy number variation, the accuracy of which is essential for studies of the contribution of variable gene copy number to phenotypic outcomes of host infection and disease course.     

乙型肝炎病毒多聚酶末端蛋白重链可变区抗体体外抑制病毒的复制

目的用蛋白片段互补法(PCA)选择HBV多聚酶末端蛋白(TP)重链可变区(VH)抗体,研究特异性VH抗体体外抑制HBV的复制与分泌。方法以HBV多聚酶TP区为抗原,用PCA法进行特异性VH抗体筛选。特异性VH抗体基因定向亚克隆人真核表达载体pZeoSV2( ),构建pZeoSV2( )-VH重组质粒,用脂质体介导的转染技术,将其导入HepG 2.2.15细胞,观察特异性抗体的生物学活性。结果用PCA法从抗体库中选择出3个特异性抗体:VH1、VH2和VH3,其中与抗原亲和力最高的是VH1。转染pZeoSV2( )-VH1的HepG 2.2.15细胞比未转染pZeoSV2 ( )-VH1或只转染空载体pZeoSV2( )的HepG 2.2.15细胞病毒颗粒分泌明显减少,上清液内为2.978 7±0.276 1比5.150 4±0.276 1和5.295 1±0.241 0(P<0.05);细胞内为5.283 9±0.162 9比8.300 4±0.323 2和8.532 1±0.138 3(P<0.05)。结论用PCA法可从抗体库中选择出HBV多聚酶TP区特异性VH抗体,该抗体在体外可抑制HBV的复制与分泌。     

信息化在规范护理敏感质量指标提取中的应用

目的 利用信息系统规范护理敏感质量指标的提取。 方法 分别通过完善及应用护理质量管理系统、医院信息网络系统(hospital information system, HIS)、蓝蜻蜓系统、“问卷星”在线调查工具4个信息系统采集变量,采集过程中进行质量控制。 结果 得出不同指标提取的相应信息渠道,规范各指标获取方法。 结论 利用信息系统进行护理敏感质量指标变量采集,保证了指标的可测量性、客观性、有效性和及时性。     

基于随机森林的精神分裂症血清代谢组学研究

目的探讨随机森林对精神分裂症患者和健康对照的血清代谢组学数据的分类能力,并筛选出差异代谢物。方法病例组为50例精神分裂症患者,对照组为62例健康个体,收集他们的血清进行代谢组学检测,然后用随机森林对数据进行分类,用OOB误差率估计、五折交叉验证评价分类效果,借助随机森林中变量重要性评分(VIM)获得重要的差异代谢物。结果随机森林对病例组和对照组的血清代谢组学数据分类效果较好。病例组错分率为4.0%,对照组错分率为1.6%。OOB误差率估计为2.68%,五折交叉验证ROC曲线下面积为0.99,并根据VIM筛选出15个重要的差异代谢物。结论将液相色谱-质谱代谢组学技术与随机森林相结合,能够筛选出有潜在临床应用价值的代谢物,可用于代谢组学研究。     

长尾黄鼠体外寄生蚤空间分布格局、变量转换及理论抽样量研究

研究结果表明,长尾黄鼠方形黄鼠蚤与总蚤的空间分布格局是邻接的,而不是随机的或一致的。它们的概率分布服从负二项分布,X_(max)~2X_(0.05)~2。据此,本文给出了用于统计分析的变量转换式与理论抽样量。变量经转换后具有好的正态性,X_(max)~2相似文献