犬原位回肠构建全尿道、膀胱的实验方法特征

目的:探索犬膀胱全切后以回肠构建全尿道、膀胱术的实验方法。方法:实验于2004-12/2005-07在吉林大学药学院生物工程研究室完成。体质量13kg的雄性京犬12只,术前禁食24h,以30g/L戊巴比妥钠按1mL/kg剂量对犬麻醉。取腹部正中切口,切除膀胱及尿道。在距回盲部约10cm处取一段30cm带血供的回肠袢,恢复肠道的连续性。取25cm回肠沿着肠管系膜的对侧缘纵向剖开,将剖开的肠管对折缝合成袋状,并将两侧输尿管种植于回肠新膀胱的适当位置。取5cm回肠剥离黏膜层并缝制成管状,构建尿道,在回肠新膀胱的底部戳孔与其缝合。连接在膀胱及尿道的原位,术中静点氧氟沙星100mL(含氧氟沙星0.2g/L)、葡萄糖注射液250mL、生理盐水250mL、缝合术后刀口,并静点氧氟沙星0.2g/d,连续给药7d,1周后正常进食、继续饲养1个月,观察动物排尿情况,行X射线影像学检查。结果:9只犬进入结果分析,另3只由于麻醉过度死亡。术后1个月观察实验动物犬,进食正常,排尿正常。术后4周X射线造影检查显示:贮尿囊显影良好,无梗阻;回肠替代膀胱充盈,肠黏膜替代尿道再生状况良好。结论:建立的犬膀胱全切原位回肠代膀胱、尿道术的实验方法,可做为组织工程膀胱、尿道移植研究的模型。     

骨髓干细胞移植后Western blot免疫印迹分析鼠抗肌萎缩蛋白表达的变化

目的:Western blot免疫印迹分析骨髓干细胞移植后mdx鼠抗肌萎缩蛋白表达的变化。方法:实验于2004-09/12在中山大学附属第一医院神经科实验室完成。①选取7～8周龄mdx鼠25只,随机数字表法分为骨髓移植4,8,12,16周组、空白对照组,5只/组。另选取4～6周龄C57鼠20只作为供体鼠,10周龄C57鼠5只作为阳性对照组。②各组在移植前均给予照射剂量为7Gy的放疗预处理。放疗完毕后,骨髓移植4,8,12,16周组均进行尾静脉细胞移植,移植细胞数为2×107/只,0.3～0.5mL;空白对照组、阳性对照组尾静脉输入0.3mL磷酸盐缓冲液。③骨髓移植4,8,12,16周组分别于对应时间点处死,取其腓肠肌,制备抗肌萎缩蛋白样品,进行抗肌萎缩蛋白Western blot免疫印迹分析,以GAPDH作为内参。结果:25只7～8周龄mdx鼠、5只10周龄C57鼠全部进入结果分析。骨髓干细胞移植后抗肌萎缩蛋白Western Blot免疫印迹分析结果:空白对照组无抗肌萎缩蛋白的表达;骨髓移植4周组仅可见抗肌萎缩蛋白的微弱表达,dystrophin/GAPDH灰度比值约为0.095±0.267;骨髓移植12周组约为0.218±0.338;随骨髓移植时间的延长抗肌萎缩蛋白表达量逐渐增加,移植后16周的表达量较移植后8周明显增加(0.393±0.385,0.173±0.284;t=6.062,P<0.05),但仍明显低于阳性对照组1.172±0.328(t=3.14,P<0.05)。结论:骨髓干细胞移植mdx鼠后应用WesternBlot免疫印迹分析可于不同时间检测到抗肌萎缩蛋白的表达,且随移植时间延长表达量增多,提示骨髓干细胞移植可长久持续参与受损骨骼肌的修复与再生。     

Thrombolytic Therapy Within One Hour of the Onset of Acute Myocardial Infarction

Between 1986 and 1988, 239 consecutive patients with acute myocardialinfarction received thrombolytic therapy up to 285 minutes afteronset of symptoms; in 39 (17 with anterior infarction, 21 inferior,one lateral infarction) recombinant tissue plasminogen activatoror anistreplase was administered a mean of 51 minutes (range20–60 minutes) after the onset of symptoms. The patencyrates (26 of 30; 87 per cent), rapid ST segment resolution (36of 38; 95 per cent) and QRS score of 3 (28 of 38; 74 per cent)were statistically significantly higher for those seen and treatedin the first hour in comparison with those seen and treatedlater. For those treated within the first hour mean peak creatine kinasewas 1264 U/I for those with TIMI grade 2 or 3 (partial or completeperfusion) compared with 3005 U/I for those with TIMI grade0 or 1 (no perfusion or penetration without perfusion) (p=0.02):mean peak creatine kinase-MB for those with TIMI grade 2 or3 perfusion was 115 U/I compared with 312 U/I for those withTIMI grade 0 or 1 (p=0.01). Four of the 39 patients developedventricular fibrillation following thrombolytic therapy, threewithin 24 hours of infarction and one following reinfarctionon day 15. There were no significant bleeding complications.One patient died. Thrombolytic therapy within 1 hour of the onset of symptomsled to a very high angiographic patency rate, rapid ST segmentresolution with preservation of left ventricular function. Thistherapy is without significant complications.     

Topical clindamycin versus systemic tetracycline in the treatment of acne: Results of a multiclinic trial

In a multiclinic double-blind trial, 305 patients with moderate to severe acne vulgaris were treated with oral tetracycline hydrochloride, 250 mg (N: 103), a 1% solution of clindamycin phosphate (N: 105), or placebo (N: 97) twice daily for 8 weeks. The response to treatment was evaluated by lesion counts and overall clinical improvement at 2, 4, 6, and 8 weeks. Both topical clindamycin and oral tetracycline significantly reduced papule and pustule counts compared to placebo; they were rated significantly higher than placebo on the physician's and the patient's overall evaluation at the end of the treatment period. No serious side effects were reported with any of the study medications.     

The growth of brain tumors can be suppressed by multiple transplantation of mesenchymal stem cells expressing cytosine deaminase

Suicide genes have recently emerged as an attractive alternative therapy for the treatment of various types of intractable cancers.The efficacy of suicide gene therapy relies on efficient gene delivery to target tissues and the localized concentration of final geneproducts.     

持续腰池脑脊液引流治疗隐球菌性脑膜炎的临床探讨

0引言 隐球菌性脑膜炎(隐脑)是由隐球菌属中某些种或变种侵犯中枢神经系统引起的一种深部真菌病. 隐脑在我国仍以散发为主,近年来发病呈明显上升的趋势;而在一些发展中国家,AIDS患者隐脑的发病率更高[1]. 隐脑的误诊率较高,其治疗中存在较多问题,因为在现有的抗真菌治疗条件下,国内外文献报道其病死率仍高达25%～60%[1]. 现将我科1997-01/2005-01收治的19例中,进行了持续腰池脑脊液(CSF)引流的9例隐球菌脑膜炎患者与对照组10例观察报告如下,探讨有效的治疗手段.