Simple measurement of spinal cord evoked potential: a valuable data source in the rat spinal cord injury model.

Measurement of spinal cord evoked potentials (SCEPs) is proposed as a means of predicting locomotion outcome in the rat spinal cord injury (SCI) model. Using 55 rats, three reproducible peak waves (waves I, II and III) were observed during stimulation at the C7 level with recording at the L1 epidural space. Hemisection at the T13 level showed three wave loss patterns: wave III loss only, loss of both wave II and III, and loss of all three waves. Defining an ideal SCI model as establishment of stable monoparesis or paraparesis, all animals in the wave II-III loss group showed favorable results. Histological data and electrophysiological properties allowed reasonable assumptions of wave origin: wave I from extrapyramidal tracts, wave II from the ventral corticospinal tract, and wave III from the dorsal corticospinal tract. Complete destruction of pyramidal tracts in both dorsal and ventral fibers was essential for long-term impairment of locomotion.     

纤维连接蛋白与动脉粥样硬化的关系

炎症机制在动脉粥样硬化斑块的发生、发展中扮演了重要角色。近年来,不断有研究证实前炎性因子纤维连接蛋白(fibronectin,Fn)密切参与了此过程,并与急性冠状动脉综合征的发生有着极强的关联性。本文就Fn与急性冠状动脉综合征的关系及其应用前景进行综述。     

输精管结扎对家兔心功能及心肌NE含量的影响

本实验用日本大耳白兔复制输精管结扎的长期动物模型，分为结扎２５月组（ＶＧ２５），同龄假手术２５月组（ＳＯＧ２５）；结扎６月组（ＶＧ６），同龄假手术６月组（ＳＯＧ６）。记录各组家兔心功能，检测心肌及血清ＮＥ含量，称取心重（ＷＨ）。结果表明，左心室收缩期末压（ＬＶＳＰ），ＶＧ略高于ＳＯＧ；左心室舒张末压（ＬＶＥＤＰ），Ｖ６２５显著的低于ＳＯＧ２５Ｐ＜０．０５），ＶＧ６与５ＯＧ６比较虽无显著差异，也呈低值；±ｄｐ／ｄｔｍａｘ，ＶＧ均明显高于ＳＯＧ（Ｐ＜０．０１）。相关检验表明，＋ｄｐ／ｄｔｍａｘ与血清及心肌ＮＥ含量无相关性；心重与＋ｄｐ／ｄｔｍａｘ呈明显正相关，Ｐ＜０．０５；在２５月组，ＬＶＳＰ与＋ｄｐ／ｄｔｍａｘ呈正相关，Ｐ＜０．０５。提示输精管结扎可提高心肌收缩功能。     

肺癌及肺良性病变角蛋白和AgNOR检测分析

目的：探讨肺良恶性病变中角蛋白和核仁组织区的表达意义。方法：采用免疫组化ＡＢＣ法和ＡｇＮＯＲ染色，对５４例肺良恶性病变进行检测。结果：角蛋白表达在低分化腺癌最高，ＡｇＮＯＲ表达以未分化癌最高。结论：角蛋白对判定肺癌类型有一定帮助，ＡｇＮＯＲ颗粒数目对判定肺癌的分化程度和预后有重要意义。角蛋白和ＡｇＮＯＲ对肺癌的类型鉴别及预后判定有重要作用。     

急性胰腺炎CT、B超、手术及临床对照研究

笔者分析了２４例急性胰腺炎的ＣＴ所见，并同Ｂ超、临床化验和剖腹探查结果进行了对照研究。表明：（１）急性胰腺炎的ＣＴ诊断优于Ｂ超，对胆源性胰腺炎Ｂ超对诊断有明确帮助。（２）急性胰腺炎时，ＣＴ表现与血淀粉酶浓度不一定成正比。（３）急性胰腺炎可累及门脉系统引起血管并发症。     

Abuse liability of flunitrazepam among methadone-maintained patients

Abuse liability and acute subjective and psychomotor effects of flunitrazepam were assessed in ten methadone-maintained males with history of benzodiazepine and alcohol use, who voluntarily participated in a double-blind, controlled, cross-over, randomized clinical trial. There were six experimental sessions in which a single oral dose of flunitrazepam 1, 2, and 4 mg; triazolam 0.5 and 0.75 mg; and placebo was given. Evaluations included physiological measures; psychomotor performance tasks (simple reaction time, Digit Symbol Substitution Test, balance task, Maddox-wing device); and self-administered subjective effects questionnaires [Addiction Research Center Inventory (ARCI), Profile of Mood States (POMS), a series of visual analog scales (VAS)]. All drugs but flunitrazepam 1 mg caused an impairment of psychomotor tasks. Effects were more evident with the highest doses of both drugs. Only flunitrazepam 4 mg produced a significant decrease in balance time. Triazolam 0.75 mg induced increases in sedation measured by ARCI-PCAG, depression in POMS, and VAS-drowsiness scores. Flunitrazepam 4 mg caused euphoria-related effects as measured by increases in ARCI-MBG and “high” scores in the VAS. Our findings of flunitrazepam-induced euphoria in methadone-maintained subjects together with epidemiological evidence of flunitrazepam abuse by opioid dependents, suggest that it may be included in the group of benzodiazepines with a relatively high abuse potential. Received: 13 February 1998/Final version: 1 May 1998     

胃癌c-erbB-2过度表达与预后的关系

探讨c－erbB－2过度表达与胃癌预后的关系。方法：用免疫组化ABC法对103例胃癌手术标本及151个转移淋巴结进行c－erbB－2表达检测。结果：21．4％胃癌手术标本出现阳性表达．其中进展期胃癌、乳头状腺癌、高中分化胃癌及伴淋巴与肝转移的胃癌阳性率显著增高（P＜0．05与＜0．01）；转移淋巴结表达阳性率高于胃癌原发灶（X2＝3．7．P＞0．05）。高中分化胃癌伴c－erbB－2过度表达者5年生存率显著低于阴性者（P＜0．01）。结论：c－erbB－2过度表达可作为胃癌预后估计指标之一。     

准分子激光心肌血管重建的实验研究

为研究心肌血管重建的机理,在15只鼠心、12只免心,用308nm的XeCl准分子激光在活体上照射左心室壁,形成边缘清楚而光滑的圆筒状心肌管道。在活体心室壁的激光管道周围,心肌细胞的损伤很轻微,无炭化焦痂层,未见碎片和凝固坏死层,只有薄层嗜伊红性变和肌浆凝聚两个断续的条形变化带。当心室壁由激光穿透时,血液从心腔进入激光管道,并与周围扩张的血管相通。实验结果提示,由于准分子激光不造成明显的热损伤,因而可能适合于心肌血管的重建。     

番荔枝酰胺的全合成研究

番荔枝(Annona squamosa)是番荔枝科番荔枝属植物,有抗菌和抗肿瘤作用。番荔枝酰胺(squamosamide)是从该植物中提取得到的一个新化合物。为进一步探明该化合物的药理活性,进行了全合成研究工作。经七步反应首次制得天然目标物,总收率14%。     

糖皮质激素联合抗凝在急性/亚急性重症颅内静脉血栓治疗中的探索

目的 本研究初步探讨糖皮质激素联合抗凝治疗在急性/亚急性重症颅内静脉血栓(cerebral venous thrombosis, CVT)中的作用。方法 纳入10例经过糖皮质激素联合抗凝治疗的急性/亚急性重症CVT患者,对治疗前后及出院3个月时的神经功能缺损、颅内压增高情况和血清、脑脊液炎症指标及不良事件进行回顾性分析。结果 10例患者经过糖皮质激素冲击治疗后2周,与入院时基线值相比,血清中性粒细胞与淋巴细胞比值(neutrophil-to-lymphocyte ratio, NLR)(P<0.05),超敏C反应蛋白(hypersensitive C-reactive protein, hs-CRP)(P<0.01),白细胞介素-6(interleukin 6,IL-6)(P<0.01)和脑脊液IL-6浓度(P<0.01)均明显下降;与入院时基线值相比,出院时改良Rankin量表(modified Rankin Scale, mRS)评分(P<0.01)、美国国立卫生研究院卒中评分(National Institutes of Health Stroke ...