中药安迪注射剂对人食管癌细胞的放射增敏作用

目的 :观察安迪注射剂 (Andi)对电离辐射生物学效应的影响。方法 :人食管癌细胞株 (ECA 10 9)在富氧 (空气 )和缺氧 (通 99 99%的高纯氮气 5 0min)条件下分别观察对照组、Andi组、60 Co γ线辐射和Andi +60 Co γ线辐射 4组细胞形态 (光镜 )、细胞倍增时间 (TD)、存活率 (SR)及集落存活分数 (SF)。结果 :光镜下可见Andi组、辐射组、Andi+辐射组癌细胞变性、坏死、凋亡 ,以Andi +辐射组为最显著。MTT法测定对照组、Andi组、60 Co γ线辐射和Andi+60 Co γ线辐射四组缺氧细胞的TD(% )分别为 4 6 12 ,118 72 ,6 2 81,171 0 2h ,SR分别为 10 0 % ,4 2 % ,86 % ,30 % ;各治疗组与对照组比较TD 和SR均相差显著 (P <0 0 5 )。方差分析显示 ,辐射在富氧 (F =90 19,P =0 0 0 0 1)和缺氧 (F =37 0 9,P =0 0 0 0 3)时均为SF的影响因素 ;Andi仅在缺氧时对SF是有意义的影响因素 (F =2 9 0 4 ,P =0 0 0 0 7) ,与60 Co γ线辐射合用对缺氧细胞SF的影响具有协同作用 (F =11 37,P =0 0 0 98)。用单靶多击模型拟合数据分析 ,Andi的放射增敏比 (SER)为 1 5 ,相对敏化效应 (RSE)为 5 5 %。结论 :Andi对缺氧ECA 10 9细胞具有明显的细胞毒和放射增敏作用。     

脉络膜黑色素瘤脱色素处理后Caspase-3的免疫组化研究

目的 观察凋亡基因Caspase-3在脉络膜黑色素瘤(choroidal melanoma)中的表达及分型与细胞凋亡的关系。方法 收集20例脉络膜黑色素瘤标本，对其进行Caspase-3免疫组织化学染色，观察表达情况及染色强度。结果 Caspase-3在脉络膜黑色素瘤有较好的表达，在梭形细胞型中5例／6例呈阳性表达，在混合型中6例／8例呈阳性表达，在上皮样瘤细胞型中3例／4例呈阳性表达，在坏死型中1例／2例呈阳性表达，且在各型之间没有显著性差异(P＞0．05)。结论 凋亡在脉络膜黑色素瘤中存在；Caspase-3在脉络膜黑色素瘤的发生发展中起重要作用。     

全腔静脉肺动脉连接手术前后血浆心钠素含量变化及其临床意义

目的　探讨全腔静脉肺动脉连接手术 (TCPC)前后心钠素 (ANP)的变化情况及其临床意义。方法　观察组为 18例全腔静脉肺动脉连接术患者 ;对照组选择 18例房间隔缺损、室间隔缺损心内修复术患者 ,两组分别于术前、术后第 1天、第 5天、第 4周和术后 6个月测量其心钠素含量。结果　观察组ANP含量术后第 1天显著下降 (t=2 6 2 3,P <0 0 1) ,此后直至出院前均显著高于对照组 ,术后 6个月时两组间无差别。观察组 7例术后出现胸腔积液并发症 ,其早期心钠素含量显著低于未发生该并发症的 11例患者 (P <0 0 5 )。结论　TCPC术后 ,因完全旷置右心 ,右房压显著下降 ,早期心钠素分泌量不足 ,这可能会导致机体水盐代谢失衡 ,与术后早期胸腔积液并发症密切相关。     

口腔修复学多媒体手册的设计与开发

本文介绍了口腔修复学多媒体手册的设计与开发。阐述了多媒体手册开发过程中制作工具的选择、素材的加工、结构的安排，并且对多媒体手册在理论、实验和临床实习中教学应用模式进行了探讨。     

Fos oncoprotein expression in the rat forebrain following muscimol-induced absence seizures

Fos oncoprotein expression is a marker of neuronal activation following seizures. Here, using this method we examined the anatomical locations of muscimol-induced absence seizures in the rat forebrain. Six hours after a systemic injection of muscimol a massive Fos immunoreactivity appeared in the olfactory system, retrosplenial cortex and paraventricular thalamic nucleus, whereas other cortical areas contained low level of Fos expression. These results provide the first functional morphological evidence suggesting that these forebrain structures with Fos expression may play an important role in the pathophysiology of muscimol-induced absence seizures.     

单克隆抗体治疗肾综合征出血热患者的初步观察

选择具有高中和活性和血凝抑制活性，且对肾综合征出血热病毒（ＨＦＲＳＶ）感染乳鼠具有良好保护作用的抗－ＨＦＲＳＶＭｃＡｂ腹水，经辛酸－硫酸铵沉淀法纯化成ＩｇＧ。在纯度鉴定、免疫学活性测定及各种安全性试验合格的基础上，首次试用于３例ＨＦＲＳ患者的治疗。结果表明，使用安全，疗效良好。随访观察１１个月，无异常反应。     

Anterior tibial artery injury is not the contraindication of medial plantar flap: digital subtraction angiography evidence and clinical application

The medial plantar artery (MPA) is often sacrificed as the vascular pedicle of the medial plantar flap (MPF). However, for patients with ankle soft tissue defect caused by traffic accident, the anterior tibial artery (ATA) could be damaged and the blood supply of the distal foot would only come from the MPA and the lateral plantar artery (LPA). In this case, sacrificing the MPA for the MPF means that the LPA will become the mainly source of blood supply of the distal foot. Whether the blood supply of the distal foot is adequately guaranteed remains to be discussed. A total of seven patients with ankle soft tissue defect and ATA injury were enrolled in the study. The digital subtraction angiography (DSA) was performed to observe the hemodynamics of the ipsilateral foot. The MPF was harvested only when the foot arterial network consisting of the MPA, the LPA, the deep plantar arch, and the deep plantar artery of DPA, and the blood redistribution existed. DSA results showed the blood from the posterior tibial artery was redistributed to the ipsilateral foot and the MPA is not the dominant artery in the foot. Seven MPFs were harvested, and all flaps survived completely. No complications, such as pain, ulcer, and necrosis, occurred in the ipsilateral toes. The DSA could accurately and intuitively evaluate the hemodynamics of foot in patients with ATA injury. The DSA data and clinical practice proved that the ATA injury is not the contraindication of the MPF.     

肝移植术后出凝血功能的调控

目的：探讨肝移植术后出凝血功能的调控方法及意义。方法：通过１１ 例活体肝部分移植术病例,介绍术后出凝血功能的监测指标及调控方法。结果：肝移植术后出凝血功能调控的目标为维持血压、脉搏相对稳定,控制下列指标在一定范围内。 Ｈｂ ：９０ ～１１０ｇ／ Ｌ, Ｈｔ：２５ ％ 上下, Ｐ Ｌ Ｔ：３０ ～５０ ×１０９／ Ｌ, Ｐ Ｔ：１５ ～２０ｓ , Ａ Ｃ Ｔ：１５０ ～２００ｓ,调控手段是依据上述指标补充凝血因子或使用扩血管剂或抗凝剂。结论：本研究所介绍的方法能有效防止肝移植术后的出血和血栓形成。     

Immunocytochemical Study of Cells in the Vitreous of Proliferative Virteoretretinopathy

Purpose: To identify the cellular components of vitreous samples obtained during vit-rectomy for proliferative vitreoretinopathy(PVR).Methods: With the use of three intermediate filament (IF) proteins, vimentin, glialfibrillary acidic protein (GFAP), and cytokeratin (CK), cytocentrifuge slides of 14fresh vitreous aspirates were detected with immunohistochemical technique.Results: All the specimens contained epithelial-like proliferative cells with or withoutpigment and some membrane-like pieces. Immunocytochemical staining showed that76.0-90.0% cells stained for CK, 17.4-29.6% cells expressed GFAP, and 80.1-91.0% cells were positive for vimentin.Conclusions : Majority of cells in the vitreous samples originated from retinal pigmentepithelial cells (RPE) and glial cells in PVR. Expression of IF proteins may be determinedby tissue of origin and local microenvironment. Eye Science 1999 ; 15; 13 - 16.     

RNAi载体构建及其对PLC/PRF/5细胞突变p53基因抑制作用的实验研究

目的利用RNA干扰(RNA interference，RNAi)技术，以突变p53基因为靶基因，构建干扰载体，并观察载体对肿瘤细胞生长周期的影响，为下一步探索肿瘤基因治疗的新途径奠定基础。方法设计具有小发夹结构的两条DNA序列，经退火成为互补双链，再克隆至干扰载体中，转化TOP10菌株，提取质粒行酶切鉴定，稳定转染PLC／PRF／5细胞，Western blot检测p53蛋白，MTT法观察细胞生长曲线，流式细胞仪分析细胞周期变化。结果成功构建针对突变p53的特异性RNA干扰载体，此干扰载体转染PL／PRF／5细胞后，p53蛋白表达水平降低，肿瘤细胞生长速度减慢，G1期细胞分布明显增多。结论成功构建针对突变p53的RNA干扰载体，此干扰载体可以有效降低p53蛋白表达水平，导致突变p53基因沉默，进而延缓PLC／PRF／5细胞生长速度，阻滞肿瘤细胞停滞于G1期。