种植受体血管内皮细胞在异种血管移植中的实验研究

目的　探讨种植受体血管内皮细胞在抗异种血管移植超急排斥反应 (HAR)方面的意义。方法　选用豚鼠→大鼠移植模型 ,先将分离、培养的大鼠动脉内皮细胞种植于去内皮的豚鼠动脉内壁 ,再将此豚鼠动脉植入大鼠体内 ,观察动脉血栓形成时间 ,并采用免疫组化技术检测了 Ig M、C3在移植后豚鼠动脉壁上沉积的情况。结果　已种植大鼠内皮细胞的豚鼠动脉血栓形成时间 (2 0 .3± 4.42 h)较植入大鼠体内的正常豚鼠动脉 (0 .35± 0 .2 84h)以及单纯去内皮豚鼠动脉血栓形成时间 (0 .16 5± 0 .0 77h)显著延长 (P<0 .0 0 1)。免疫组化结果显示 ,植入大鼠体内的正常豚鼠内皮细胞表面有 Ig M和 C3沉积 ,而预先种植大鼠内皮细胞的豚鼠动脉内壁无 Ig M和 C3沉积。结论　在异种供体血管壁上预先种植受者血管内皮细胞 ,可延长移植的异种供体血管通畅时间 ,该技术可能在抗异种血管移植 HAR方面具有重要意义     

Distribution of alpha 2-adrenergic receptor mRNAs in the rat CNS.

alpha 2-Adrenergic receptors (ARs) are involved in central nervous system (CNS) control of blood pressure. It is now known that there are three human genes that encode subtypes of alpha 2-ARs, but little is known regarding the distribution of these subtypes throughout the CNS. The availability of receptor clones allows the mapping of mRNAs encoding the individual alpha 2-AR subtypes in the CNS. In this communication, we report that there are three, closely related rat alpha 2-AR genes. We have developed subtype-specific hybridization probes from each of these genes and have used these reagents to measure alpha 2-AR subtype mRNA accumulation in extracts of discrete regions of the rat CNS. We found that mRNAs encoding the alpha 2A-AR and alpha 2C-AR subtypes are distributed widely, but unevenly, throughout the rat CNS. The A subtype is prominent in the midbrain, brainstem, spinal cord, pituitary and diencephalon while the C subtype predominates in basal ganglia and cerebellum. The cortex, olfactory bulb and hippocampus contain roughly equal amounts of the alpha 2A- and alpha 2C-AR mRNAs. A third subtype's (alpha 2B-AR) mRNA is far less abundant in brain tissues, and is only found in the diencephalon.     

胃癌组织p16基因蛋白表达的意义

目的　检测 p1 6基因蛋白在胃癌组织、癌旁组织中的表达及其分布特点 ,分析其与胃癌临床病理学特征及预后的关系 .方法　采用 S- P免疫组织化学法对 53例胃癌组织及 35例癌旁组织进行 p1 6蛋白的定位观察 .结果　各病理类型胃癌组织、癌旁组织均有 p1 6基因蛋白表达 .阳性率分别为 62 .3% (33/53)和 88.6% (31 /35) ,阳性细胞的棕黄色颗粒主要位于细胞核 .胃癌 p1 6基因蛋白表达与性别、年龄、肿瘤部位在统计学上无差异 (P>0 .0 5) ;而与组织学类型、病理分级、淋巴结转移、临床病理分期在统计学上有差异 (P<0 .0 5) .p1 6蛋白阳性者 5年生存率 51 .0 %高于 p1 6蛋白阴性者 2 0 .0 % (P<0 .0 5) .结论　 p1 6基因缺失和表达水平的改变与胃癌发生、发展密切相关 ,检测 p1 6基因蛋白表达可作为辅助临床判断胃癌的生物学行为及推测预后的指标     

Poncet病(病例报告及文献复习)

目的 探讨Poncet病的诊断与治疗。方法 通过病例报告及献复习，综述了Poncet病的发病机理、临床表现。结果 提高对Poncet病的认识。结论 临床上对风湿性或类风湿性关节炎病人均应与本病鉴别。     

普拉固和鱼油对高胆固醇血症患者血脂与心脑血管事件影响的比较

目的:比较普拉固和鱼油对高胆固醇血症患者的血脂、血粘度、血管内皮功能和心脑血管事件的影响。方法:对266例原发性高胆固醇血症患者经2周洗脱期后,随机分为两组,普拉固组,初服10mg,每晚一次,8周后若TC仍>5.2mmol/L,LDL—ch>3.12mmol/L,则加量至20mg/d,每8周再查血脂,以达到TC<5.2mmol/L,LDL—ch<3.12mmol/L的量作治疗量继续服用。鱼油组,服美国深海鱼油一日三次,一次3g,均于服药8周复查血脂、血粘度及血管内皮功能等并作16月随访。结果:治疗8周,TC,普拉固组下降26％,鱼油组下降12％(P<0.01)。LDL—ch,普拉固组下降31％,鱼油组下降11％(P<0.01),肱动脉流量介导的舒张与硝酸甘油介导的舒张,普拉固组分别增加104％和19％,鱼油组无明显改变。全血低切粘度,普拉固组减少23％,鱼油组减少10％(P<0.01)。平均随访16月,普拉固组中脑出血1例(0.8％),鱼油组发生心脑血管事件7例(5.3％),死亡1例(P<0.05)。两组均无明显的不良反应。结论:普拉固是一个安全有效的降脂药,能改善血管内皮功能,降低血粘度,减少高胆固醇血症病人心脑血管事件发生。     

坏宜性脓皮病12例临床分析

报告12例疸性腔皮病患者的性别与年龄构成、并发症、实验室检查、治疗经过和结果，对该病的病因、治疗和预后进行了讨论。     

青菜的保鲜贮藏研究

目的 :延长青菜在冷藏条件下的贮藏期 ,解决海军舰艇冷藏库蔬菜贮藏期短的问题。方法 :使用塑料袋、纸箱、塑料筐为包装材料 ,塑料袋内充O3 负离子对青菜在 2℃和 9℃条件下进行保鲜贮藏。结果 :2℃条件下塑料袋包装青菜贮藏期延长至 2 5d ,腐烂率小于 5 .9%。结论 :使用塑料袋包装青菜 ,适宜的贮藏温度为 2℃。     

Influence of serum protein on polycarbonate-based copolymer micelles as a delivery system for a hydrophobic anti-cancer agent.

A new micelle system formed from methoxy (polyethylene glycol)-b-poly (5-benzyloxy-trimethylene carbonate; MePEG-b-PBTMC 5000-b-4800) was investigated as a delivery system for the hydrophobic anti-cancer agent, ellipticine. The ellipticine was loaded into the MePEG-b-PBTMC micelles with a loading efficiency of 95% using a high-pressure extrusion technique. The ellipticine-loaded micelles have a spherical morphology and an average diameter of 96 nm. The anti-cancer activity of ellipticine was confirmed to be retained following formulation in the MePEG-b-PBTMC micelles. The extent of protein adsorption to the MePEG-b-PBTMC micelles was investigated by transmission electron microscopy, dynamic light scattering and gel filtration chromatography. Overall, the amount of protein both loosely and tightly associated with the micelles was found to be minimal and insignificant. The partitioning properties of ellipticine between an aqueous medium containing protein and the MePEG-b-PBTMC micelles were examined over a range of protein concentrations. Under physiologically relevant conditions, it was found that 61% of the drug remained within the micelle fraction while 39% was in the protein-containing aqueous phase. In addition, the in vitro drug release profile of ellipticine from the micelles was fit using a modified Higuchi model and found to be accelerated in the presence of protein. These studies demonstrate that although there are no significant interactions between micelle and protein, the properties of the micelle as a delivery vehicle may be strongly influenced by protein-drug interactions.     

分步延期切开复位内固定治疗胫骨Pilon骨折29例

目的 :介绍采用分步延期切开复位内固定治疗 Pilon骨折的经验 ,并进行评估。方法 :采用分步延期切开复位内固定治疗 2 9例 Pilon骨折 ,先用跨踝关节外固定支架临时固定 ,若同时有腓骨骨折一期行切开复位内固定腓骨 ,软组织肿胀消退后 ,再行切开复位内固定胫骨 ,采用影像学与 Helfet标准来评定疗效。结果 :术后 2 5例获得优良关节面复位 ( 86.2 % ) ,2 6例下肢力线恢复良好 ( 89.7% ) ,所有病例均获得随访 ,随访时间 1 2～ 40个月。采用Helfet标准评定疗效 :优 9例 ( 31 % ) ,良 1 3例 ( 4 4.8% ) ,差 7例 ( 2 4 .1 % ) ;优良率 75 .9% ;切口感染 3例 ,切口边缘皮肤坏死 1例 ,通过换药创口愈合 ;关节退行性变 1 1例 ;关节强直 1例。结论 :采用分步延期切开复位内固定治疗胫骨 Pilon骨折能有效降低并发症的发生率 ,获得良好的踝关节功能 ,是治疗胫骨 Pilon骨折一种有效的方法。