不同微生物诱导家蝇幼虫表达抗菌肽的特性

研究不同微生物诱导家蝇幼虫表达的抗菌肽特性.用3种不同的病源菌通过针刺感染的方法诱导家蝇幼虫表达抗菌肽,通过Sephadex G25分离,用Hult mark改进法和抑菌圈测定法作抑菌试验,用毛细管电泳（CE）分析不同微生物诱导得到的抗菌肽样品差异,检测抗菌肽的热稳定性和酸碱耐受性.发现不同微生物诱导产生的家蝇抗菌肽具有广谱抑菌性,但不同样品对不同病源菌抑菌活性有差异,不同测定抑菌效果的方法对抑菌结果有影响,各种抗菌肽样品CE蛋白谱具有明显不同.抗菌肽样品都具有热稳定性和酸碱耐受性.说明不同微生物诱导产生的家蝇抗菌肽类型以及抗菌肽含量与诱导源有关,抗菌肽为家蝇幼虫体内固有成分,诱导增加了抗菌肽的表达量同时刺激新抗菌肽的产生.用志贺氏菌、金黄色葡萄球菌、鼠伤寒沙门氏菌诱导家蝇幼虫可产生较多含量高活性好的抗菌肽.     

多发性硬化患者血清尿酸水平变化的研究

目的　探讨多发性硬化 (MS)患者血清尿酸 (UA)水平的变化及其临床意义。方法　采用酶定量分析法对 4 3例MS患者和 4 5名正常对照者的血清UA水平进行检测。结果　MS组血清UA水平明显低于对照组 (P <0 0 1)。MS组中病程越长 (P <0 0 1)、神经伤残程度越重 (DSS评分越高 ) (P <0 0 5 ) ,血清UA水平越低 ;女性患者UA水平明显低于男性患者 (P <0 0 0 1) ;经过糖皮质激素治疗后血清UA水平明显回升 (P <0 0 0 1) ,但治疗前血清UA水平越低则疗效越差 (P <0 0 1、P <0 0 5 )。结论　MS患者血清UA水平降低 ,且与MS的病程、伤残程度、疗效及性别密切相关。UA水平升高可能为激素治疗MS的一个作用机制     

胸腰椎骨折术后内固定松动、断裂的原因及预防

目的 探讨椎弓根螺钉系统用于胸腰椎骨折术后出现松动、断裂的原因，并提出相应的预防对策。方法 12例胸腰椎骨折术后内固定失效病例，采用RF系统3例，AF系统9例。均未行植骨融合，AF系统中未按要求安装横连结3例，术后伤椎前缘高度平均恢复至正常的85．2％。结果 术后8—21个月出现棒断裂4例，螺钉断裂3例，钉帽松动5例。结论 内固定物的自身问题、术者的经验欠缺及操作不规范是胸腰椎骨折术后椎弓根螺钉系统松动、断裂的原因，但伤椎骨结构未能得到良好重建及术后椎间盘退变可能是其更重要的因素。因此重视内固定物的选择、加强规范操作，强调对损伤椎体及椎间盘的全面处理是预防内固定失效的有效措施。     

APTT测定值和APTT测定值比率的临床应用价值探讨

目的;探讨APIT测定值(秒)和APIT测定值比率中哪一种是更稳定、更可靠的临床应用指标。方法:将同一标本采用法国STA-Compat全自动血凝仪以及两种手工法同时测定,比较同组标本不同方法的APTT测定值(秒)和APTT测定值比率。结果:手工法(一)与法国STA-Compact全自动血凝仅比较,如APTT值以秒表示,对照组、口服抗凝剂组及肝病组病人同组标本不同方法之间存在显著性差异(P<0.01,P0.10,P>0.50,P>0.05);手工法(二)与法国STA-Compact全自动血凝仪在对照组、口服抗凝剂组及白血病组的比较中,也获得类似的结果。结论:将APTT测定值(秒)转化为病人与对照APTT测定值比率报告,使不同方法结果间更具可比性。在APTT报告的标准化方面,建议将APTT和APTT测定值比率同时报告。     

Modeling of relationships between pharmacokinetics and blockade of agonist-induced elevation of intraurethral pressure and mean arterial pressure in conscious dogs treated with alpha(1)-adrenoceptor antagonists.

Fiduxosin is a new alpha(1)-adrenoceptor antagonist targeted for the treatment of symptomatic benign prostatic hyperplasia. The purpose of this study was to determine and compare the potencies of the alpha(1)-adrenoceptor antagonists terazosin, doxazosin, tamsulosin, and fiduxosin, based on relationships between plasma drug concentrations and blockade of phenylephrine (PE)-induced intraurethral (IUP) and mean arterial pressure (MAP) responses after single oral dosing in conscious male beagle dogs. Magnitude of blockade and plasma concentrations were evaluated at selected time points over 24 h. All drugs produced dose-dependent antagonism of PE-induced IUP and MAP responses. When IUP and MAP blockade effects were plotted against drug plasma concentrations, direct relationships were observed that were well described by the sigmoidal maximal effect model. IUP IC(50) values for terazosin, doxazosin, tamsulosin, and fiduxosin were 48.6, 48.7, 0.42, and 261 ng/ml, respectively. MAP IC(50) values were 12.2, 13.8, 1.07, and 1904 ng/ml, respectively. Uroselectivity index values, defined as MAP IC(50)/IUP IC(50), were 0.25, 0.28, 2.6, and 7.3, respectively. These results extend previous observations with terazosin in this model, showing that doxazosin exhibits a uroselectivity index comparable to terazosin, consistent with the lack of alpha(1)-adrenoceptor subtype selectivity or uroselectivity of these drugs. Tamsulosin, an alpha(1a)-/alpha(1d)-subtype selective agent, had an index value approximately 10-fold greater than the nonselective drugs. Based on its pharmacokinetic profile and a relative uroselectivity 29-fold greater than the nonselective drugs, fiduxosin is expected to exhibit greater selectivity for urethral compared with vascular alpha(1)-adrenoceptors in human and should be a novel, long-acting, uroselective alpha(1)-adrenoceptor antagonist.     

Buccal mucosal graft for urethral reconstruction.

Urethral reconstruction with graft substances, such as skin and bladder mucosa, has been previously used when primary anastomosis cannot be achieved. However, stricture and meatal prolapse are associated with these grafts. We report the use of buccal mucosa for the reconstruction of urethral defects in 3 patients. One patient with failed operation for hypospadias received tube buccal mucosal graft for urethral replacement. Two patients with urethral necrosis and stricture received onlay buccal mucosal graft. All patients were disease-free during follow-up (range, 12 to 49 months; mean, 36 months). One patient had a pinhole fistula that was successfully managed with simple repair. This technique appears to be useful for urethral reconstruction when a local graft is not available, even in patients with complicated conditions.     

全雄激素阻断前后前列腺癌细胞中Bcl-2和Bcl-XL基因表达改变

全雄激素阻断是前列腺癌(PCa)治疗的重要手段。虽然已发现一些蛋白分子涉及雄激素的调节[1] ,但其分子机理尚不清楚。我们采用分子生物学方法检测人PCa全雄激素阻断前后Bcl 2和Bcl XL 蛋白的表达,探讨PCa发生发展的分子机理。材料与方法　4 2例局限性PCa患者。全雄激素阻断治疗采用抑那通或诺雷德皮下注射加口服Flutamide 3个月,然后患者接受PCa根治术。PCa标本分别经穿刺活检和根治术标本取得,10 %福尔马林固定后石蜡包埋,病理证实。Bcl 2和Bcl XL 蛋白单克隆抗体(1/ 2 0 0 )和试剂盒购于SantaCruzInc。显微镜下,细胞着色棕黄…     

针刀配合膝关节间断主动活动治疗膝关节强直

膝关节强直是膝关节及关节周围创伤、关节炎晚期及手术后的严重并发症,同时伴有髌骨活动度严重减少甚至消失.病理多为髌上囊及两侧沟的广泛粘连,部分患者伴有关节外结构的挛缩.物理治疗几乎无效、开放性手术切开松解及关节镜下松解创伤大,出血多,存在再粘连的可能性,手术并发症多,一次手术失败,没有再次松解的机会.我院自1997年8月-2002年3月,应用针刀闭合松解加关节间断主动活动治疗严重膝关节粘连52例疗效满意.……     

超声抽吸法治疗下肢原发性淋巴水肿

目的观察超声抽吸法治疗下肢原发性淋巴水肿的疗效。方法为12例患者采用内超声脂肪抽吸机吸除淋巴水肿组织以降低患肢淋巴负荷，抽吸后结合持续弹力袜裤压扎。结果术后2周水肿即时消退明显，术后1年随访水肿消退，复发不明显。结论超声抽吸法治疗原发性淋巴水肿安全简便，结合弹性袜裤压扎可望取得较好的远期疗效。