慢性丙型肝炎患者丙型肝炎病毒核酸与IgM抗体关系的研究

本文检测了１４０例丙型肝炎病毒（ＨＣＶ）抗体（抗－ＨＣＶ）阳性的慢性丙型肝炎（ＣＨＣ）的ＨＣＶ核酸（ＨＣＶＲＮＡ）和ＩｇＭ抗体（抗－ＨＣＶＩｇＭ）两项指标。结果表明，原始诊断为不同临床型的肝炎（ＨＣ）患者，８年随访时，ＨＣＶＲＮＡ和抗－ＨＣＶＩｇＭ阳性率分别为８０．７％和９０．７％（ｕ＝２．３９Ｐ＜０．０５）．在原始诊断不同临床型ＨＣ转慢者中，上述两项指标均未发现统计学上的差别（均为Ｐ＞０．０５）。ＨＣＶＲＮＡ与抗－ＨＣＶＩｇＭ配对比较，符合率为７８．６％。基因分型初步结果表明，河北省固安ＨＣＶ以基因Ⅱ型为主。本研究提示，随访８年的ＣＨＣ患者绝大多数仍有传染性；本文方法检测的抗－ＨＣＶＩｇＭ不能代表早期感染标志，但代表慢性感染活动化或带毒，所以，在不具备检测ＨＣＶＲＮＡ的地方更具有实用价值．     

Astrocyte RNA in relation to neuronal RNA depletion in Alzheimer's disease

Summary A new double-staining procedure, in which the techniques of immunocytochemistry of glial fibrillary acidic protein (GFAP) and quantitative microdensitometry of azure B-RNA were combined, was used to study nucleic acid alterations in fibrous astrocytes in Alzheimer's disease (AD). RNA contents of GFAP-positive cells of the hippocampal endplate (Rose's H₃-H₅ fields) and the dentate gyrus molecular layer were determined in ten autopsy-proven AD patients (ages 51–88) and ten age-matched, non-demented control. In addition, RNA contents of pyramidal neurons of the endplate were examined. While there were no differences in RNA contents of astrocytes of either region between AD patients and controls, neuronal RNA was markedly depleted. These data suggest that astrocytes maintain protein synthetic capabilities in AD and that RNA loss is limited to the neuronal compartment.Supported by Grants 1P01-AG05119 and 1P50-AG05144 from the National Institutes of Health and by a Small Research Project Award from the University of Kentucky Medical Center     

丙型肝炎患者外周血单核细胞中丙型肝炎病毒复制的研究

９例临床诊断为丙型肝炎患者，研究其外周血单核细胞中ＨＣＶＲＮＡ的存在及复制。９例患者血清标本抗－ＨＣＶ及ＨＣＶＲＮＡ均为阳性，采用高敏感的逆转录一套式ＰＣＲ法测定其外周血单核细胞中ＨＣＶ正、负链ＲＮＡ，结果９例患者外周血单核细胞中７例ＨＣＶ正链ＲＮＡ阳性，３例ＨＣＶ负链ＲＮＡ阳性，证实部分丙肝患者外周血单核细胞中存在ＨＣＶ的复制，表明肝细胞并非为ＨＣＶ感染与复制的唯一场所。     

焦炉工人接触PAH水平与肺癌的关系

焦炉工人接触ＰＡＨ水平与肺癌的关系王溪鸿，马会良，杨玉萍（辽宁本溪钢铁公司劳动卫生研究所，１１７０２１）选择焦炉作业各工种工人两名，配戴个体采样器，测得一个工作班的接触浓度，连续测五个工作班，计算各工种每班平均接触浓度。采用高压液相色谱测定多环芳烃总...     

Expression of IGF-I and IGF-II mRNA in breast tissue

Summary Expression of IGF-I and IGF-II was studied in human breast cancer tissues by in situ hybridization. IGF-I mRNA was detected only in stromal cells adjacent to normal breast epithelial cells. Stromal cells associated with the tumor cells did not contain IGF-I, nor did malignant or benign breast epithelial cells. In contrast, IGF-II mRNA was found in both the malignant epithelial cells and their adjacent stromal cells. These data imply that stromal cells associated with breast epithelium may switch expression from IGF-I to IGF-II during breast cancer evolution. This appearance of IGF-II expression may identify cancer-associated stromal cells that have a fetal phenotype.     

性传播疾病危险人群乙型肝炎和丙型肝炎病毒感染的血清流行病学调查

通过对４３１名卖淫妇女和１０９名正常妇女ＨＢＶ和ＨＣＶ感染的血清学指标的检测、性传播有关因素的调查，发现卖淫妇女ＨＢＶ和ＨＣＶ感染中的抗－Ｈｋｃ为４３．１５％，抗－ＨＢｓ为３６．８９％，ＨＢｓＡｇ为１０．４４％，抗－ＨＣＶ为９．５１％，明显高于正常妇女；有性传播疾病者ＨＢＶ和ＨＣＶ的各项感染指标也明显高于正常妇女。卖淫妇女的抗－ＨＣＶ感染率有随年龄增长而增高的趋势，与卖淫时限长、卖淫次数多有明显差别，这表明卖淫妇女中有较严重的ＨＢＶ和ＨＣＶ感染。     

甲硫氨酸脑啡肽对抗体和白细胞介素－2的产生和基因转录的影响

甲硫氨酸脑啡肽对抗体的产生和Ｔ细胞免疫功能具有调节作用。为了明确这种作用机制，本实验观察了抗体和白细胞介素－２（ＩＬ－２）的产生和基因表达。甲硫氨酸脑啡肽对３Ｆ３杂交瘤细胞的抗体产生及其轻链和重链基因表达影响不明显。较高浓度的甲硫氨酸脑啡肽（０．１ｎｍｏｌ·Ｌ￣（－１）－１μｍｏｌ·Ｌ（－１））不仅促进ＩＬ－２的产生和ＩＬ－２ｍＲＮＡ的转录，而且能提高ＩＬ－２ｍＲＮＡ的稳定性。     

卵巢肿瘤细胞DNA及RNA含量的定量分析及其临床意义

本资料对９３例不同性质的卵巢肿瘤细胞ＤＮＡ及ＲＮＡ含量进行了定量研究，其中５０例良性、４３例恶性。并对患者进行１～５年的随访。结果是卵巢良性肿瘤的异倍率（假阳性）为４４％，恶性肿瘤异倍率为８６．０％。以“标准ＤＩ”及“标准ＲＩ”为指标判断卵巢肿瘤性质的准确率较以“异倍性”为高，且双指标同时应用高于任一单指标：对卵巢良恶性肿瘤的诊断准确率分别为９０％和９５．３％。提出“标准ＤＩ”和“标准ＲＩ”是判断卵巢肿瘤性质的理想指标。且ＤＮＡ及ＲＮＡ含量与卵巢癌预后有密切关系。     

维拉帕米抑制培养细胞DNA、RNA和蛋白质合成的作用

为探讨钙拮抗剂对细胞大分子物质的代谢影响,本文观察了维拉帕米对人成纤维细胞(2BS)和猴内皮细胞(RF/6A)DNA,RNA和蛋白质合成的作用.维拉帕米抑制2BS细胞DNA和RNA合成的作用为浓度依赖性,ID_(50)分别为12.3和22μg/ml.抑制RF细胞DNA和蛋白质合成的ID_(50)分别为34.4和49.6μg/ml.     

雪芪通肾汤对糖尿病肾病大鼠肾功能及肾脏p38丝裂原活化蛋白激酶mRNA表达的影响

目的探讨雪芪通肾汤对糖尿病肾病大鼠肾功能及p38丝裂原活化蛋白激酶（p38MAPK）mRNA表达的影响。方法将46只大鼠随机分为4组，即正常组10只，模型组、贝那普利组和雪芪通肾组各12只。模型组、贝那普利组、雪芪通肾组用采用链脲佐菌素（STZ）造模。造模成功后，各治疗组均给药24周。取动脉血测肾功能，取左侧肾脏，检测p38MAPKmRNA在肾组织中的表达。结果贝那普利组、雪芪通肾组较模型组的血肌酐（Cr）、尿素氮（BUN）均降低（P〈0．01）。雪芪通肾组较正常组Cr无明显变化（P〉0．05）。半定量分析结果表明贝那普利组、雪芪通肾组p38MAPKmRNA的表达比模型组有所降低（P〈0．01），比正常组有所升高（P〈0．01）。结论雪芪通肾汤可降低糖尿病大鼠肾脏p38MAPKmRNA表达，保护肾功能，延缓糖尿病肾病进程。