雌激素受体(ER)与基因蛋白(P53、erbB-2)在胃癌中表达的研究

目的:探讨ER、erbB-2和P53在胃癌表达及相关性。方法:取胃癌手术标本119例,SP免疫组织化学染色。结果:ER、erbB-2和P53在胃癌表达率分别为63.87％,75.51％和73.11％;三者同时阳性者31.93％;ER与P53同时阳性者37.82％;ER与erbB-2同时阳性者33.61％;ER在高分化组阳性率高于低分化组(P<0.05);而erbB-2和P53在低分化组阳性率高于高分化组。70岁以上组P53、ER和erbB-2表达率均较高。结论:ER、P53和erbB-2在胃癌中表达率与癌瘤分化程度相关。P53和erbB-2有相关性,而且它们是胃癌预后不良的指标。     

《中国文献编目规则》(计算机文档)与ISBD(ER)的比较分析

通过对《中国文献编目规则》（计算机文档）（简称CDCR（CF））与ISBD（ER）的比较分析，提示了CDCR（CF）在著录电子资源时存在的局限性，旨在为我国CDCR（CF）的修订提供著录方面的参考。     

尿路移行细胞癌雌孕激素受体的免疫组化研究

为探讨雌激素受体(ER)、孕激素受体(PR)在尿路移行细胞癌中的表达及生物学意义,对64例尿路移行细胞癌石蜡标本进行了免疫组化(SABC法)检测。结果是示:ER、PR阳性率分别为53.1％和50.0％;其中在高分化癌中ER、PR表达高于低分化癌;分级间比较有显著性差异(P<0.05);ER、PR阳性率随肿瘤分期升高而下降,但分期间比较无显著性差异(P>0.05);另外单发肿瘤、多发肿瘤及复发肿瘤之间,男女两性肿瘤之间及尿路各部位之间,ER、PR阳性表达率亦无显著性差异。结论:尿路移行细胞癌ER、PR有较高的表达率.且和分级正相关,提示ER、PR表达可能对尿路移行细胞癌有某种直接或间接的影响,并可作为肿瘤愈后判断指标之一。     

Chemoprotective Role of Triphala Against 1,2-Dimethylhydrazine Dihydrochloride Induced Carcinogenic Damage to Mouse Liver

The present study was carried out to investigate the protective role of Triphala (a combination in equal proportions by weight of fruit powder of Terminalia belerica, Terminalia chebula and Emblica officinalis) against 1,2-dimethylhydrazinedihydrochloride (DMH) induced Endoplasmic reticulum stress (ER stress) in mouse liver. An oral dose of 3 mg/kg body wt in drinking water for 5 weeks significantly (P < 0.001) increased the levels of serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), serum Alkaline phosphatase (ALP) and total bilirubin thus suggesting damage to mouse liver and biliary dysfunction. The DMH administration invariably led to increase in the liver microsomal proteins of molecular weight of about 29 (ERp29) and 53 kDa (ERp53) and decrease in the protein of molecular weight of 36 kDa (ERp36) thereby suggesting the interference of DMH and its metabolites with normal protein biosynthesis and folding, in the reticular membranes of the liver cells thus developing ER stress. Histological studies show necrosis, large sized hepatocytes with increased N:C ratio, aberrant mitotic figures and prominent nucleoli in the liver of DMH treated mice. In animals fed 5% Triphala in diet (w/w) during DMH administration, there was significant decrease in the above changes in the liver suggesting the suppression of DMH induced ER stress in liver. Triphala significantly (P < 0.05) decreased lipid peroxidation and also the activity of lactate dehydrogenase (LDH) in mouse liver. It simultaneously increased the level of reduced glutathione (GSH) and the activity of glutathione-S-transferase (GST) thereby suggesting that it prevents peroxidative damage and also diverts the active metabolites (electrophiles) of DMH from their interactions with critical cellular bio-molecules which could be responsible for its protective action against DMH.     

雌孕激素受体与P53、bcl-2基因蛋白在大肠良恶性病变中表达的相关性研究

目的探讨ER、PR、P53、bcl-2在大肠良恶性病变中的表达相关性.方法利用ER、PR、P53及bcl-2特异性抗体对75例大肠良恶性肿瘤进行SABC免疫组织化学染色.结果四种抗体联合表达率在47例大肠恶性肿瘤、28例良性增生性疾病和41例癌旁移行区粘膜分别为26.83%、10.7%和0.10例大肠息肉P53和bcl-2均无表达,41例癌旁移行区未见P53表达.ER、PR联合表达率在大肠癌(42.55%)明显高于癌旁(17.07%),P53和bcl-2联合表达率在癌、良性增生和癌旁分别为48.94%、17.80%和0,三者间差异显著.而四种抗体表达与患者性别、年龄无关.结论ER、PR、P53和bcl-2表达与大肠肿瘤发生有关.P53基因突变是人类大肠癌发生的最常见的遗传学改变之一,bcl-2是大肠癌发生的早期分子水平标志;激素及其受体改变促进肿瘤的发生并且雌、孕激素受体水平与肿瘤的病理分化程度有关.     

机械图形的XML数据存储结构设计

研究了XML数据的存储方法,并在比较现有的存储策略的基础上,提出了采取用户定制的方案。随之进行了图形关系模式的逻辑设计,进行了元数据库设计,组件库设计,并建立了ER集成模型。最后分别建立了元数据表,图形实体,风格属性的物理模型。通过对XML数据存储结构的设计能更好的发挥机械图形标记语言的潜能。     

Signal frequency based self-tuning fuzzy controller for semi-active suspension system

INTRODUCTIONRoadvehiclesuspensiondesignhasreceivedgreatattentioninrecentyears .Theperformanceofthesuspensionsystemplaysanimportantroleinachievinggoodhandlingandridingcomfort.Practically ,thesimplestandmostcommontypesofsuspensionsarepassiveinthesensethatno…     

Signal frequency based self-tuning fuzzy controller for semi-active suspension system

A new kind of fuzzy control scheme, based on the identification of the signal's main frequency and the behavior of the ER damper, is proposed to control the semi-active suspension system. This method adjusts the fuzzy controller to achieve the best isolation effect by analyzing the main frequency's characters and inspecting the change of system parameters. The input of the fuzzy controller is the main frequency and the optimal damping ratio is the output. Simulation results indicated that the proposed control method is very effective in isolating the vibration. Project (No. 69974024) supported by the National Natural Science Foundation of China     

Online Catalog Maintenance

LIAS, the Pennsylvania State University's (Penn State) integrated interactive online system, provides for messaging by the user to inform library staff of errors found in bibliographic records. The message is sent by use of the OOPS command, and results in a printout which is used by processing staff for online catalog maintenance. This article describes LIAS, the use of the OOPS command, the processing of the resulting OOPS reports, an assessment of the effect of its use, and some speculation on the expansion of the LIAS message system for use in catalog maintenance.     

乳腺癌ER、PR、C-erbB-2表达与病理类型相关性研究

目的:探讨ER、PR与C-erbB-2在乳腺癌中的表达及相关性.方法:采用免疫组织化学SP法对79例乳腺癌和14例乳腺良性病变进行ER、PR、C-erbB-2的表达进行检测.结果:乳腺癌中的ER、PR、C-erbB-2阳性率分别为52.7%,47.3%,30.9%.ER、PR、C-erbB-2的表达与乳腺癌的组织类型、分化程度具有相关性;ER、PR在所有良性病变、低度恶性肿瘤中表达水平较高,在浸润癌、有淋巴结和全身转移的肿瘤中表达水平较低;C-erbB-2在所有良性病变中呈阴性表达,在低度恶性肿瘤中表达水平较低,在浸润癌、有淋巴结和全身转移的肿瘤中表达水平较高;ER、PR与C-erbB-2、表达之间均存在负相关.结论:ER、PR、C-erbB-2的检测对乳腺癌治疗方案的制定和预后估计有重要意义.