骨形态发生蛋白人工骨椎间融合器植入改变椎体滑脱椎间隙高度

目的:观察骨形态发生蛋白人工骨椎间融合器椎间植入对椎体滑脱患者椎间隙高度的影响。方法:选择1997-01/2004-01桂林医学院附属医院骨科收治的资料完整的腰椎滑脱患者114例,均知情同意。行后路椎间融合术时根据椎间融合材料的不同,将114例患者分为3组,自体髂骨椎间融合组(两块自体髂骨椎间融合)42例;自体髂骨 椎间融合器组(自体骨 单枚椎间融合器)36例;骨形态发生蛋白人工骨 椎间融合器组(骨形态发生蛋白人工骨 单枚椎间融合器)36例。椎间融合器具有优良的生物力学稳定性及良好的固定功能,能提供较大面积的植骨床;骨形态发生蛋白人工骨由处理后的牛松质骨与成品重组人骨形态发生蛋白2按一定比例组成。术后定期随访,比较3组患者的基本情况、临床效果和影像学结果(脊柱融合率和手术节段椎间隙高度的变化)。随访时采用临床功能评估标准(0~9评分系统)进行疗效评估,包括疼痛、止痛药使用、日常生活状况及工作状况4个项目,0~1分为优,2~3分为良。脊柱融合状况根据Kuslich融合标准(椎间隙中骨桥形成、屈-伸位片上活动<5°、融合器周围无透亮区、矢状位CT片上有骨桥从上位椎体到达下位椎体)进行评定。结果:114例腰椎滑脱患者全部进入结果分析,无脱落。患者术后随访时间为15~30个月,其中15~20个月104例,20~25个月6例,25~30个月4例,平均随访时间自体髂骨椎间融合组为15个月,自体髂骨 椎间融合器组为16个月,骨形态发生蛋白人工骨 椎间融合器组为16个月。①术后1年椎间隙高度:自体髂骨椎间融合组显著低于自体髂骨 椎间融合器组和骨形态发生蛋白人工骨 椎间融合器组(P<0.05)。②疗效优良率:3组优良率差异无显著性意义(P>0.05)。③术后1年脊柱融合率:骨形态发生蛋白人工骨 椎间融合器组显著高于自体髂骨椎间融合组及自体髂骨 椎间融合器组(97.0%,81.0%,83.3%,P<0.05)。结论:骨形态发生蛋白人工骨椎间融合器作为腰椎滑脱后路椎间融合的植骨材料,术后融合率高,椎间隙高度丢失少,治疗效果优于自体髂骨椎间植骨和自体骨椎间融合器椎间融合。     

1-芳基-4-乙氧羰基-5-氨基-1,2,3,-连三唑和几种亲电子试剂的反应及产物抗菌性能的研究

本文研究1-芳基-4-乙氧羰基-5-氨基-1,2,3,-连三唑(1)同过量乙酸,乙酸酐、乙酰氯、苯甲酰氯以及甲酰胺等的反应,制得1的14种新衍生物:1-H-4-乙氧羰基-5-芳胺基-1,2,3-连三唑(2 b～d),1-酰基-4-乙氧羰基-5-芳胺基-1,2,3-连三唑(3a～d),1-芳基-4-乙氧羰基-5-乙酰胺基-1,2,3-连三唑-(4a～d)以及1-甲酰基-4-乙氧羰基-5-对硝基苯胺基-1,2,3-连三唑(5a),1-苯甲酰基-4-乙氧羰基-5-对硝基苯胺基-1,2,3-连三唑(5b),1-对氨苯甲酰基-4-乙氧羰基-5-对硝基苯胺基-1,2,3-连三唑(5c)。所有化合物的结构,均经元素分析及波谱分析确证,并筛选了一些化合物的抗菌作用。     

宫腔镜诊治宫内病变166例

1 临床资料 2003-03/2004-08我院异常子宫出血及婚后不孕患者,经宫腔镜检查发现宫内病变者166例,年龄24～57岁,异常子宫出血时间0.5～10 a.     

铁轴草二萜成分的化学研究

从铁轴草(Teurcium quadrifarium Buch-Ham)的丙酮提取部分分离出六个新—克罗烷(neoclerodane)型二萜(Ⅰ,Ⅱ,Ⅳ～Ⅶ)。其中五个为已知化合物,分别鉴定是teucvidin(Ⅰ),12-epi-teucvidin(Ⅱ),teufiin(Ⅳ),19-acetyl-tetmpinin(Ⅴ)和tcucvin(Ⅶ)。Ⅵ为新化合物,命名为teuquadrin B。     

Dendritic dynamics in vivo change during neuronal maturation

In vivo imaging of optic tectal neurons in the intact Xenopus tadpole permits direct observation of the structural dynamics that occur during dendritic arbor formation. Based on images of single DiI-labeled neurons collected at daily intervals over a period of 6 d, we divided tectal cell development into three phases according to the total length of the dendritic arbor. During phase 1, the cell differentiates from a neuroepithelial cell type and extends an axon out of the tectum. The total dendritic branch length (TDBL) is <100 micrometers. During phase 2, when TDBL is 100-400 micrometers, the dendritic arbor grows rapidly. During phase 3, when TDBL is >400 micrometers, the dendritic arbor grows slowly and appears stable. Neurons at different positions along the rostrocaudal developmental axis of the tectum were imaged at 2 hr intervals over 6 hr and at 24 hr intervals over several days. Images collected at 2 hr intervals were analyzed to determine rates of branch additions and retractions. Morphologically complex, phase 3 neurons show half the rate of branch additions and retractions as phase 2 neurons. Therefore, rapidly growing neurons have dynamic dendritic arbors, and slower-growing neurons are structurally stable. The change in growth rate and dendritic arbor dynamics from phase 2 to phase 3 correlates with the developmental increase in synaptic strength in neurons located along the rostrocaudal tectal axis. The data are consistent with the idea that strong synaptic inputs stabilize dendritic arbor structures and that weaker synaptic inputs are permissive for a greater degree of dynamic rearrangements and a faster growth rate in the dendritic arbor.     

Skin sensitization: reaction mechanistic applicability domains for structure-activity relationships

The prediction of skin sensitization potential with minimum animal testing is currently of great importance in light of forthcoming legislation. A number of structure-activity relationships for skin sensitization have been published over the years, but their applicability has often been limited to structural classes. The concept of an applicability domain for a quantitative structure-activity relationship [(Q)SAR] is increasingly being viewed as key for the predictive application of (Q)SARs. This is particularly the case for skin sensitization if more widely applicable SARs are to be developed. In this paper, we analyze a recently published chemical data set for skin sensitization, apply reaction mechanistic criteria to domain classification, and evaluate the structure-activity trends observed within each of these mechanistic domains.     

牛膝多糖硫酸酯的合成及其抗病毒活性

从中药牛膝中提取得到的一种新多糖化合物一牛膝多糖,用不同的硫酸化试剂合成牛膝多糖硫酸酯。研究了最佳反应条件,其产物水溶性好,呈中性,最高产率达82.11%,取代度(Ds)···达到三以上,硫含量达21%以上。根据牛膝多糖的分子结构,多糖分子中的羟基已最大限度地被酯化。体外抗病毒试验初步表明牛膝多糖硫酸酯有很强的抑制乙型肝炎病毒HBsAg和HBeAg的活性,对I型单纯性疱疹病毒也有明显的抑制力。     

Cytotoxic Effect of Anti-H-2 and Anti-Ia Antisera on Human B and T Cells

Anti-H-2 and anti-Ia alloimmune mouse antisera were tested by the microcytotoxicity test on human peripheral blood B- and T-cell preparations. Anti-H-2 antisera react by a higher titer and/or cytotoxicity scoring grade on B cels than on T cells. Anti-Ia antisera react practically only with B cells. It was assumed that anti-H-2 antisera contain two components. One component reacts specifically with certain HLA-A- or -B-locus antigens or other closley linked gene products. The other component reacts predominantly or only with B-cell determinants; the specificity of the latter component has not yet been studied in sufficient detail.