人工假体置换治疗高龄股骨转子间骨折的疗效及原理

目的：探讨人工假体置换治疗高龄股骨转子间不稳定性骨折的疗效及原理。方法：采用人工假体置换手术治疗75岁以上高龄老人(平均82．5岁)不稳定性股骨转子间骨折37例。其中Evans Ⅲ型9例，Ⅳ型23例，V型5例。其中30例(81％)合并3种以上并存症，并存症中以心血管疾病为主，其次为糖尿病，脑血管病。结果：本组病例无1例术中或住院期间死亡，平均随访18个月。入院至手术时间5～7d，平均6．5d。手术时间45～80min，平均60min，术中输血2～8单位红细胞(平均4单位红细胞)。住院时间20～30d(平均24d)：伤口一期愈合，未见感染，松动，脱位者。结论：①人工假体置换治疗高龄股骨转子间不稳定性骨折，具有有效止痛，早期离床，并发症少，死亡率低的优点，疗效令人满意；②术后可负重而没有骨折局部塌陷的危险，利于早期康复；③应严格掌握其适应症，强调围手术期的正确处理。     

Orthofix-微型外固定器治疗Bennett骨折31例

目的分析应用Orthofix-微型器治疗第一掌骨基底部Bennett骨折的临床疗效。方法收集2009年1月~2013年1月我院31例采用Orthofix-微型器治疗的第一掌骨基底部Bennett骨折患者。记录患者年龄、性别等基线资料,以及术后上肢臂、肩、手功能调查量表(Disabilities of the arm,shoulder and hand,DASH)评分,随访终末期采用指总关节活动度(Total action movement,TAM)评分。结果随访6~24个月,平均14.4月,手术时间为18~40分钟,平均29.1分钟,术中出血量10~30m L,平均14.5m L。术后3月、术后6月及终末期DASH评分之间比较,差异均有统计学意义(0.05)。随访终末期,其中26例解剖复位,5例骨折对线良好,TAM评分优22例,良7例,差2例。随访期间未发生桡神经浅支损伤、钉道感染等并发症。结论 Orthofix-微型外固定器治疗Bennett骨折操作简单、疗效满意。     

Engineered BGMK cells for sensitive and rapid detection of enteroviruses

Decay-accelerating factor (DAF) has been reported to be a cellular receptor for several enteroviruses. Buffalo green monkey kidney (BGMK) cells expressing human DAF (BGMK-hDAF cells) showed increased susceptibility and sensitivity to several types of enteroviruses compared to wild-type BGMK cells. When 17 frozen positive clinical samples were tested, BGMK cells detected 8 and BGMK-hDAF cells detected 16. Since the CaCo-2 cell line has been documented to support the replication of most enteroviruses, CaCo-2 cells were mixed with BGMK-hDAF cells in order to increase the number of viruses detected. Thirty-four frozen clinical samples that previously had tested positive for enteroviruses were tested, and the following numbers were detected: 33 of 34 by CaCo-2/BGMK-hDAF cells, 29 of 34 by CaCo-2/BGMK cells, 28 of 34 by H292/RD (E-mix A) and A-549/BGMK (E-mix B) cells, and 26 of 34 by MRC-5 and pRhMK cells.     

戊型肝炎病毒归科的形态学证据

采用超簿切片制样及负染色免疫电镜方法，对经细胞培养自戊型肝炎病人分离的８７Ａ株病毒进行了形态及形态发生的研究。结果显示，感染细胞胞浆局灶性空泡液泡病变区明显而普遍；病毒呈晶格样排列，在胞浆内装配成熟，与粗面内质网、病毒性包涵体、微丝等密切相关；病毒毒粒无囊膜，大小约３０ｎｍ呈圆形，表面形态不规整，电致密度不均一，偶见“凹杯形”、“刺突”等表面超微结构；感染细胞核呈现扭曲变形，异染色质趋边等显著受累及病变。其形态及形态发生特征表明其应为嵌杯病毒科新属—嗜肝ＲＮＡ病毒属的成员，而部分核苷酸序列分析也支持其为戊型肝炎病毒。     

Metabolism and physiological behaviour of Leuconostoc mesenteroides subsp. mesenteroides growing on raffinose

The α-galactosidase activities of 11 strains of Leuconostoc mesenteroides subsp. mesenteroides grown on glucose, lactose or raffinose were determined. The inductive effects of lactose and raffinose differed depending on the strain. In four of the strains, α-galactosidase activity of cells grown on lactose was higher than that of cells grown on raffinose, while the reverse was true for one other strain. The study of two strains exhibiting a different behaviour was extended to all raffinose-component sugars: melibiose, sucrose, glucose, galactose and fructose. The apparent fermentation yields with raffinose-component sugars complied with heterofermentation theory, except for sucrose, where there was a 40% deficit in fermentation products. Raffinose hydrolysis enzymes (α-galactosidase and β-fructosidase) underwent a catabolic repression by glucose. Growth on raffinose was considerably stimulated if the inoculum was first grown on melibiose or raffinose (induction of α-galactosidase).     

H_2O_2和NO对滑膜成纤维细胞增殖反应的影响

采用~3H-TdR掺入法和MTT比色法研究过氧化氢(H_2O_2)和一氧化氮(NO)对兔滑膜成纤维细胞(SF)增殖反应的影响。结果表明,在使用亚适SF浓度(5×10~7细胞/L)时,~3H-TdR掺入法和MTT比色法检测结果一致。H_2O_22和亚硝基铁氰化钠(NO供体)在低浓度时促进SF增殖反应,而在高浓度时抑制其增殖反应,提示H_2O_2和NO对SF增殖反应具有双向调节作用。     

人FascDNA的克隆及其在大肠杆菌中表达的研究

为获得高质量及充足的Ｆａｓ蛋白，采用ＰＣＲ技术调整Ｆａｓ基因的开放阅读框架，使之与生物素化蛋白基因阅读框架一致；缺失了ＦａｓｃＤＮＡ基因的起始密码子并增加一个大肠杆菌偏性终止密码子，构建ＦａｓｃＤＮＡ和生物素化融合原核表达质粒ＰｉｎＰｏｉｎｔ－Ｆａｓ。将重组质粒转入大肠杆菌ＨＢ１０１，经５００ｍｍｏｌＩＰＴＧ在３７℃条件下诱导４ｈ，ＳＤＳ－ＰＡＧＥ及Ｗｅｓｔｅｒｎ印迹检测融合蛋白在大肠杆菌得以高效表达，表达量为细菌总蛋白的１３．８％。用亲和层析树脂对生物素化融合蛋白进行亲和层析纯化，得到Ｆａｓ重组的蛋白，且表达的Ｆａｓ融合蛋白具有抗体结合活性。此蛋白的表达成功将解决Ｆａｓ膜蛋白不易提取的难题，为深入研究Ｆａｓ提供了良好材料来源     

免疫调节剂对烫伤大鼠脾细胞抗SRBC抗体及IFN—γ产生的作用

为探讨烧伤对大鼠免疫功能的影响及不同免疫调节剂对它的作用，本研究利用烫伤大鼠实验模型，采用溶血分光光度法和微量细胞病变抑制法，在整体条件下分别测定了各组烫伤大鼠伤后第５、１０天时脾细胞产生ＴＦＮ－γ和抗ＳＲＴＢＣ抗体的能力。