Presence of apolipoprotein E on extracellular neurofibrillary tangles and on meningeal blood vessels precedes the Alzheimer β-amyloid deposition

The localization of apolipoprotein E (ApoE) has been examined immunohistochemically in the autopsied brains of middle-aged and old-aged control subjects, with and without amyloid protein (A) deposits, and of Alzheimer's disease patients. Senile plaques were consistently labeled with ApoE antiserum even in the very early stage of senile plaque formation seen in the fifth decade. In the cerebellar molecular layer, small dots of ApoE immunoreactivity, which were prominent in the Alzheimer's disease subjects, were observed in addition to immunoreactivity in diffuse plaques. ApoE antisera labeled all of the extracellular neurofibrillary tangles (NFT), whereas only a small minority of extracellular NFT were positive for A. A punctate pattern of ApoE immunoreactivity was seen at the media of the meningeal vessels lacking amyloid, when senile plaques were present in the nearby cortex. In the early stage of amyloid angiopathy, the distribution of ApoE immunoreactivity was much more extensive than that of A positivity. These findings suggest that ApoE accumulates in the early stage of senile plaque formation and, furthermore, that ApoE accumulation precedes A deposition in extracellular NFT and amyloid angiopathy.     

Solute Absorption from the Airways of the Isolated Rat Lung. IV. Mechanisms of Absorption of Fluorophore-Labeled Poly-α,β-[N(2-Hydroxyethyl)-DL-Aspartamide]

The pulmonary absorption kinetics of a single molecular weight distribution (MWD) of fluorophore-labeled poly-,-[N(2-hydroxyethyl)-DL-aspartamide] (F-PHEA), a hydrophilic and biocompatible synthetic polypeptide, were studied in the isolated, perfused rat lung (iprl) as functions of administered polymer concentration, dose, vehicle, and presence and absence of fluorophore. The MWD was characterized before and after absorption by measurement of weight- and number-averaged molecular weights (M _wand M _n, respectively) using high-performance gel-permeation chromatography. Values for M _w and M _n were 8.6 and 5.3 kD before, and 6.7 and 4.7 kD after, absorption into the perfusate; there was no significant metabolism and the MWD of the absorbed polymer was independent of both dose and sampling time over a 3-hr period. F-PHEA failed to show any evidence of aggregation in solution or changes in dose distribution within the airways as functions of increasing polymer concentration and dose. A concentration ranging study indicated the presence of a saturable, carrier-mediated transport process for F-PHEA with a maximum absorption rate, V _max, of approximately 180 µg or 0.027 µmol/hr. Coadministration of fluorophore-free PHEA was capable of depressing the absorption of F-PHEA. The transport process for F-PHEA appeared to have a molecular weight limit of about 7 kD for this hydrophilic polymer.     

Evaluation of a novel bis-naphthalimide anticancer agent,DMP 840, against human xenografts derived from adult,juvenile, and pediatric cancers

The new bis-naphthalimide antitumor agent (R,R)2,2-[1,2-ethanediylbis[imino(1-methyl-2.1-ethanediyl)]-bis {5-nitro-1H-benz[de]-isoquinoline-1,3-2H) dione} dimethanesulfonate (DMP 840) was evaluated against parental and multidrug-resistant human KB cell lines in vitro and against these lines growing as xenografts in immunedeprived mice. In vitro, KB8-5 cells were 50-fold resistant to vincristine but only 16-fold resistant to DMP 840 as measured by clonogenic survival. For in vivo evaluation, DMP 840 was given by i. v. injection daily for 9 days or for 5 days/week for 2 consecutive weeks [(dx5)2]. In contrast to the cross-resistance of KB cell lines in vitro, both KB3-1 and KB8-5 tumors were highly and equally sensitive to DMP 840; only KB3-1 xenografts demonstrated sensitivity to vincristine, which was consistent with the in vitro results. DMP 840 was also evaluated against a panel of human tumors comprising colon adenocarcinoma and rhabdomyosarcoma xenografts. Against eight lines of colon adenocarcinoma, DMP 840 caused a high frequency of partial and complete regressions in two lines and significant inhibition of growth in two lines. DMP 840 caused complete regressions in five of six lines of advanced rhabomyosarcomas, demonstrating a broad range of effective dose levels. The pattern of activity against this tumor panel was similar but not identical to that of two inhibitors of topoisomerase I. There was no cross-resistance to DMP 840 in xenografts selected for resistance to vincristine or in a rhabdomyosarcoma selected for resistance to the topoisomerase I inhibitor topotecan. In contrast, a colon tumor selected for topotecan resistance was completely resistant to DMP 840. Slight cross-resistance to DMP 840 was demonstrated in a rhabdomyosarcoma xenograft that was selected for primary resistance to melphalan and was cross-resistant to topoisomerase I inhibitors. The pattern of activity and cross-resistance in these tumors was compared with that shown by two agents that inhibit topoisomerase I: topotecan and CPT-11.This work was supported in part by CA23099, Cancer Center Support (CORE) grant CA21675, The Du Pont Merck Pharmaceutical Company, and by American Lebanese Syrian Associated Charities (ALSAC)     

SEARCH FOR HERPES SIMPLEX VIRUS TYPE2（HSV－2）AND HUMAN PAPILLOMAVIRUS（HPV）IN THE NORMAL AND ABNORMAL CERVICAL SAMPLES

ＳＥＡＲＣＨＦＯＲＨＥＲＰＥＳＳＩＭＰＬＥＸＶＩＲＵＳＴＹＰＥ２（ＨＳＶ－２）ＡＮＤＨＵＭＡＮＰＡＰＩＬＬＯＭＡＶＩＲＵＳ（ＨＰＶ）ＩＮＴＨＥＮＯＲＭＡＬＡＮＤＡＢＮＯＲＭＡＬＣＥＲＶＩＣＡＬＳＡＭＰＬＥＳＺｈａｎｇＷｅｉ;张伟;ＪｉｎＳｈｕｎｑｉａ...     

106例肺切除术分析

1982年3月～1994年12月,我们为各类肺部疾病进行肺切除术106例。术中、术后发生并发症23例次占21．6％,术后30日内死亡2例占1．8％．文内着重对支气管胸膜瘘、血胸、肺血管损伤大出血、癌栓脱入对侧肺支气管、肺静脉癌栓脱入股动脉及心跳聚停等并发症的防治及紧急处理进行了讨论。此外,作者认为,肺叶切除术目前在大多数病例仍是肺癌外科的“标准术式”,但在心肺功能允许并由于技术或肿瘤学原因非行全肺切除术才能达到根治性切除时,就要果断地行全肺切除,心包外处理肺血管有困难时,要毫不迟疑地采取心包内途径。     

上海市50岁及以上人群维生素D水平与握力的关联研究

目的 探讨上海市≥50岁人群维生素D水平与握力的关系。方法 数据来源于WHO全球老龄化与成人健康研究我国上海市2018-2019年数据,采用logistic回归模型分析维生素D水平与握力的关系,进一步按照性别、年龄及乳制品摄入情况进行分层;采用限制性立方样条曲线绘制维生素D水平与低握力的剂量-反应曲线。结果 共4 391人纳入研究,其中男性2 054人（46.8%）;年龄（67.02±8.81）岁;低握力1 421人（32.4%）;维生素D不足及缺乏分别为1 533人（34.9%）和401人（9.1%）。在调整相关混杂因素后,logistic回归分析结果显示,维生素D缺乏的人群发生低握力的风险更高（OR=1.41,95%CI：1.09~1.83）;在男性中,调整相关混杂因素后,维生素D缺乏与低握力发生风险呈显著正相关（OR=1.67,95%CI：1.12~2.50）,而女性中两者之间无关联（OR=1.30,95%CI：0.97~1.74）;在60~69岁及≥80岁年龄组中,调整相关混杂因素后,维生素D缺乏与低握力发生风险呈显著正相关（OR=1.57,95%CI：1.05~2.35;OR=2.40,95%CI：1.08~5.31）,在乳制品摄入<250 ml/d的人群中,调整相关混杂因素后,二者之间呈显著正相关（OR=1.57,95%CI：1.17~2.09）,而在乳制品摄入≥250 ml/d的人群中无明显关联。限制性立方条样图显示,低握力的发生风险可能随维生素D含量的上升而降低,但差异无统计学意义（P>0.05）。结论 维生素D水平与握力存在一定的关系,维生素D缺乏人群出现低握力的风险更高。     

口腔修复中高熔铸件浇铸不全的原因浅析及预防

目的:探讨高熔铸件浇铸不全的可能原因。方法:通过对临床85件可摘铸件缺损的初浅分析,总结出浇铸不全的可能原因。结果:高熔铸件浇铸不全的原因有以下7个方面:①铸金量不足;②熔金温度过低;③离心力不够;④铸道布局不当;⑤铸件过薄;⑥高温包埋料透气性差;⑦铸圈温度下降。结论:通过查找原因,总结出预防的方法,对提高高熔铸件修复体的质量有一定的作用。     

高校离退休老人躯体健康与心理状况的相关性研究

目的：了解离退休老人躯体健康和心理状况的关系。方法：采用ＣＭＩ和ＳＣＬ－９０对２２５名高校离退休老人进行调查,分析两者的关系。结果：既往健康状况、神经系统疾病和躯体化成正相关;强迫与呼吸系统疾病成正相关,与心血管系统疾病成负相关;疲劳感和敌对成负相关,和睡眠饮食障碍成负相关。结论：维持老人心身健康,主要在于防治慢性疾病和神经系统疾病,以及对躯体化障碍和强迫症状的干预     

胎儿先天性心脏病筛查方法的研究

为尽早确诊胎儿先天性心脏病(简称先心病),对200例胎儿进行B超心动图检查,发现心脏异常36例(18%),其中先心病26例(13％)。测定有高危因素的103例孕母血清风疹病毒抗体IgM,10例阳性(9.7％),其中7例胎儿有先心病(70%),其灵敏度为70％,特异度为92.3％,可做为胎儿先心病的筛查方法。两项检查合用,可提高胎儿先心病的诊断水平。同时提示胎儿超声心动图检查中增加卵圆孔直径和血流的评定可作为房间隔缺损的诊断标准。     

心脏瓣膜替换术体外循环搏动性血流灌注临床应用研究

本文报道心脏瓣膜病二尖瓣替换或二尖瓣加主动脉瓣双瓣膜替换术６５例,用双盲法选择病例,其中体外循环搏动性血流灌注３３例,平流灌注３２例,两组比较：搏动组心脏自动复跳率明显提高,术中尿量明显增加,术后用呼吸机时间明显缩短,差异有极显著性（Ｐ＜００１）,肢体末梢皮肤温度恢复时间提前,应用心肌正性肌力药例数,时间明显减少,两组差异明显（Ｐ＜００５）,血红蛋白尿例数有所增高,血小板计数（ＰＣ）及术后引流量差异无显著性（Ｐ＞００５）,随搏动时间的延长,血浆游离血红蛋白呈进行性增高,平均每３０ｍｉｎ增高６ｍｇ,差异有非常显著性（Ｐ＜００１）。研究证明搏动性血流灌注明显优于平流灌注。