大鼠异体肢体移植术后急性排斥反应阶段血管内皮细胞ICAM-1表达的动态变化

Objective To investigate the dynamic changes of intercellular adhesion molecule-1 (ICAM-1) expression in endothelial cells (EC) during hindlimb allograft acute rejection in rats and the inhibitory effect of cyclospofine A (CsA) on the acute rejection. Methods The rat model of hindlimb allograft was developed. The rats were randomly divided into following groups: control group (Wistar→Wistar), rejection group ( Sprague-Dawley→Wistar) and CsA-treated group (Sprague-Dawley→Wistar). At postoperative day 1, day 4 and day 7samples of the femoral artery from the allograft limb were harvested to observe the pathologic changes. ICAM-1 expression in EC was quantified using immunohistochemical assay. Results Slight swelling and weak ICAM-1expression of EC were observed in the control group. In the rejection groups, obvious EC swelling and massive lymphocyte infiltration were seen. ICAM-1 expression in EC was significantly stronger and elevated. In CsA-group only mild infiltration of lymphocytes was seen and ICAM-I expression in EC was also much weaker.Conclusion During rat hindlimb allograft acute rejection the expression of ICAM-1 in EC was closely related to the occurrence and development of acute rejection. CsA could reduce the expression of ICAM-1 in EC and hence inhibit acute rejection of composite allograft.     

针刀结合透明质酸钠治疗踝关节软组织撞击综合征

目的:探讨利用针刀结合透明质酸钠关节腔注射治疗踝关节软组织撞击综合征的方法及其疗效。方法:踝关节软组织撞击综合征患者38例,男22例,女16例;年龄26-63岁,平均38岁;左侧14例,右侧24例。所有患者均有踝关节外伤史,主诉有顽固性踝关节疼痛并经4个月以上保守治疗无效,同时有影像学支持。踝关节前外侧压痛27例,前内侧压痛6例,前方压痛5例。用小针刀松解修切撕裂的韧带及瘢痕样组织,并在关节内注射透明质酸钠。结果:所有患者均获随访,随访时间10-38个月,平均16个月。根据Meislin标准对疗效进行评估,疗效优12例,良16例,中6例,差4例。无感染或神经损伤等并发症发生。结论:针刀结合透明质酸钠关节腔注射对踝关节软组织撞击综合征具有创伤小、恢复快等治疗效果。     

经跗骨窦入路治疗跟骨骨折

跟骨骨折是足部的常见骨折,占跗骨骨折的60%～65%,而涉及距下关节面的关节内骨折占所有跟骨骨折的70%[1].对于关节内的跟骨骨折,大多倾向于采用足跟外侧" L"形切口切开复位及钢板内固定治疗,并取得满意的临床疗效,但采用足跟外侧"L"形切口的最大缺点是术后切口边缘皮肤的坏死率高达14%[1].     

草木犀流浸液片联合甘露醇治疗胫腓骨骨折所致肢体肿胀

目的观察草木犀流浸液片治疗胫腓骨骨折所致肢体肿胀的疗效及不良反应。方法选取胫腓骨骨折患者共90例的临床资料进行回顾性分析,根据用药情况将患者分为治疗组、对照组和联合用药组共3组,每组各30例,分别观察各组肢体肿胀消退的程度和治疗时间。结果草木犀流浸液片组与甘露醇组相比疗效无显著性差异(P>0.05),联合用药组的疗效优于单独用药组。结论草木犀流浸液片具有抗渗出、改善末梢循环、促进创面愈合及明显的消炎镇痛作用,故在治疗胫腓骨骨折所致肢体肿胀方面有应用价值。草木犀流浸液片和甘露醇联合应用,可以治疗中重度肢体肿胀;轻度肢体肿胀患者,单独服用草木犀流浸液片更为方便。     

大鼠异体肢体移植术后急性排斥反应阶段血管内皮细胞ICAM-1表达的动态变化

Objective To investigate the dynamic changes of intercellular adhesion molecule-1 (ICAM-1) expression in endothelial cells (EC) during hindlimb allograft acute rejection in rats and the inhibitory effect of cyclospofine A (CsA) on the acute rejection. Methods The rat model of hindlimb allograft was developed. The rats were randomly divided into following groups: control group (Wistar→Wistar), rejection group ( Sprague-Dawley→Wistar) and CsA-treated group (Sprague-Dawley→Wistar). At postoperative day 1, day 4 and day 7samples of the femoral artery from the allograft limb were harvested to observe the pathologic changes. ICAM-1 expression in EC was quantified using immunohistochemical assay. Results Slight swelling and weak ICAM-1expression of EC were observed in the control group. In the rejection groups, obvious EC swelling and massive lymphocyte infiltration were seen. ICAM-1 expression in EC was significantly stronger and elevated. In CsA-group only mild infiltration of lymphocytes was seen and ICAM-I expression in EC was also much weaker.Conclusion During rat hindlimb allograft acute rejection the expression of ICAM-1 in EC was closely related to the occurrence and development of acute rejection. CsA could reduce the expression of ICAM-1 in EC and hence inhibit acute rejection of composite allograft.     

大鼠异体肢体移植术后急性排斥反应阶段血管内皮细胞ICAM-1表达的动态变化

目的 研究大鼠异体肢体移植术后急性排斥反应阶段,移植肢体血管内皮细胞细胞间黏附分子-1(intercellular adhesion molecule-1,ICAM-1)动态变化及环孢素A(cyclosporine A,CsA)抗免疫排斥的作用.方法 建立大鼠肢体移植动物模型,随机分为对照组(Wistar大鼠→Wistar大鼠)、排斥组(SD大鼠→ Wistar大鼠)和CsA治疗组(SD大鼠→Wistar大鼠),术后1、4、7 d获取移植肢体股动脉行病理学观察,采用免疫组化法检测移植肢体血管ICAM-1表达的变化.结果 对照组供体移植肢体股动脉血管内皮细胞仅出现轻微肿胀与ICAM-1表达微弱;排斥组血管内皮细胞肿胀明显,淋巴细胞大量浸润,ICAM-1的表达强度和数量明显增加;CsA治疗组移植肢体血管内皮细胞仅有少量淋巴细胞浸润,ICAM-1表达较弱.结论 大鼠异体肢体移植术后急性排斥反应阶段,血管内皮细胞ICAM-1表达水平与排斥反应的发生和发展有关,CsA可降低移植肢体血管内皮细胞ICAM-1表达,抑制复合组织移植术后急性排斥反应.     

丹参注射液对颈椎病家兔血液流变性的影响

目的观察家兔颈椎间盘退变过程中血液流变性变化和丹参注射液对这些变化的影响.方法通过破坏家兔颈椎动、静力平衡,建立家兔颈椎间盘退变的模型.60只兔子,随机分成3组,颈椎间盘退变组(A)40只,分4个亚组(A1、A2、A3、A4),即为造模后1、3、5、7月组,每组各10只;退变加丹参治疗组(B)10只,造模后饲养6个月后,每日腹腔内注射丹参注射液2 ml,1个月后处死;正常对照组(C)10只.通过测定血液流变学(全血低切黏度、高切黏度、血浆黏度、红细胞比容、血沉、血浆纤维蛋白原),比较各组之间的差异.结果 7月组(A4)家兔全血高切黏度、低切黏度、血浆黏度、血沉与正常对照组(C)比较有极显著差异(P＜0.01),红细胞比容同正常组比较P＜0.05;丹参治疗组(B)家兔全血高切黏度、低切黏度、血沉与A4组比较P＜0.01,红细胞比容同A4组比较(P＜0.05),以上均有显著性差异.结论丹参能改善家兔血液流变性和微循环的灌注,促进组织的修复,阻止椎间盘的进一步退变.     

TIMP-4基因的克隆、原核表达及活性测定

目的：采用RT-PCR法获取TIMP-4基因,并通过原核表达获取具有生物活性的TIMP-4融合蛋白。方法：从SD大鼠心肌组织中提取总RNA,利用RT-PCR法扩增出TIMP-4基因,经基因序列分析后构建表达载体PET-28a（＋）-TIMP-4,转化大肠杆菌BL21,IPTG诱导TIMP-4的表达。利用N2＋-NTA纯化和复性后,根据其骨肉瘤细胞迁移能力的影响检测其活性。结果：克隆到编码序列完全正确的大鼠TIMP-4基因,能在大肠杆菌中获得高效表达,表达产物占全菌总蛋白的23.5%,N2＋-NTA纯化和复性后,纯度达90%以上。纯化后的融合蛋白使骨肉瘤细胞株的迁移能力得到显著抑制。结论：通过基因克隆和原核表达的方式可以大量获得具有生物活性的TIMP-4融合蛋白。     

脊柱颈胸段全脊椎切除术内固定重建的生物力学

目的:研究颈胸段脊柱肿瘤在T1椎体全脊椎切除术后,前路、后路或者前后联合内固定重建方法的生物力学的优缺点。方法:使用6具颈胸段脊柱标本。在完整状态进行力学分析后,T1脊椎根据WBB脊柱肿瘤解剖区域分类依次切除。然后前路利用颈椎前路带锁Orion钢板和钛网进行固定和重建,后路利用SUMMIT方向螺钉枕颈胸钉棒系统或者联合前后路两种重建方法进行测试。在非破坏性生物力学状态下进行屈伸和左右侧屈等不同工况下测试。结果:T1脊椎全脊椎切除术后,前路钢板固定加后路短节段的椎弓根螺钉固定,其刚度优于单纯后路双节段的经椎弓根螺钉固定。前路钢板固定加后路双节段的椎弓根螺钉固定,其刚度优于前路钢板固定加后路单节段的椎弓根螺钉固定,但两者之间无显著性差异。全脊椎切除后,单纯前后钢板固定,其刚度下降明显,在肋椎关节切除后,已近失稳。结论:临床上在全脊椎切除后,尽可能采用前后联合固定,后路可以采用单节段的经椎弓根螺钉固定。临床医师应该注意的是,全脊椎切除后,单纯前路钢板固定,稳定性较差,尤其在患者肋椎关节已被肿瘤破坏的情况下,稳定性更差。     

跖肌腱扇形膜片治疗跟腱严重马尾样撕裂损伤

目的　研究跖肌腱扇形膜片治疗跟腱严重马尾状损伤的术式及结果。方法　对 18例急性闭合性跟腱严重马尾状损伤患者 ,在改良Kessler法端端吻合的基础上 ,采用跖肌腱扇形膜片加固术。结果　平均随访 14 .2个月 ,按Arner-Lindholm疗效评定标准评估 ,优 15例 (83.3% ) ,良 2例 (11.1% ) ,优良率为 94 .4 %。结论　跖肌腱扇形膜片可应用于跟腱严重马尾状损伤的患者 ,手术操作简单 ,临床疗效满意 ,值得推广。