后腹腔镜手术在泌尿外科的应用

目的　探讨后腹腔镜手术治疗泌尿系疾病的方法及疗效。方法　采用后腹腔镜手术治疗泌尿系疾病3 5例 ,其中肾上腺肿瘤及肾上腺囊肿切除 13例 ,肾囊肿去顶术 15例 ,精索静脉曲张高位结扎术 4例 ,UPJ成形术 1例 ,乳糜尿行肾蒂淋巴管结扎术 1例 ,肾切除 1例。结果　 3 5例手术全部成功。手术时间 3 0～ 13 0分钟 ,术中平均出血 2 0ml。术后住院时间 1.5～ 14天 ,平均 4.5天。结论　腹腔镜手术治疗泌尿系疾病 ,具有损伤小 ,住院时间短 ,恢复快 ,并发症少等优点 ,值得临床推广应用     

山东产四种菟丝子免疫增强作用的比较研究

目的 比较山东产四种菟丝子对小鼠免疫功能、抗疲劳、耐缺氧等方面的作用。方法 选用昆明种小鼠，用山东产四种菟丝子的水、醇提取物灌胃，观察小鼠腹腔巨噬细胞吞噬功能、免疫器官重量的变化、游泳实验和耐缺氧等指标。结果 山东产四种菟丝子均可增加小鼠吞噬百分率，使幼龄小鼠的胸腺和脾脏增重，并可显著延长小鼠的游泳及缺氧存活时间。其中以菟丝子和南方菟丝子的作用较好，水提取物的作用优于醇提取物。结论 山东产四种菟丝子具有增强机体免疫功能、抗疲劳、耐缺氧作用。菟丝子中的多糖是其提高机体免疫力，增强体质的有效物质之一。     

In vitro differentiation of human adipose-derived adult stromal cells into neuron-like cells in hippocampal astrocyte conditioned medium

BACKGROUND: At present, researches on differentiating from human adipose-derived adult stromal cells (hADASC) to neuron-like cells are focus on inducing by artificial-synthetic compound solution; however, hippocampal astrocyte conditioned medium (HCAM) can induce in vitro differentiation from hADASC to neuron-like cells is still unclear. OBJECTIVE: To observe whether HCAM can induce in vitro differentiation from hADASC to neuron-like cells. DESIGN: Randomized control study. SETTING: Department of Neurology, Taixing People's Hospital; Central Laboratory, North China Coal Medical College. MATERIALS: Donor of adipose tissue was donated by female volunteers suffering from caesarean section in the department of obstetrics & gynecology in our hospital and aged 20－35 years. Adipose tissue was collected from subcutaneous tissue of abdomen during the operation. In addition, 8 male newborn Wistar rats within 24 hours with average body mass of 20 g were provided by Animal Institute of Chinese Academy of Medical Sciences. Rabbit-anti-human Nestin polyclonal antibody, rabbit-anti-human glial fibriliary acidic protein (GFAP) polyclonal antibody, rabbit-anti-human neuro-specific enolase polyclonal antibody and mouse-anti-human microtubal associated protein 2 (MAP-2) polyclonal antibody were provided by Wuhan Boster Company. METHODS: The experiment was carried out in the Central Laboratory of North China Coal Medical College from October 2004 to June 2005. hADASC was cultured with HCAM and its growth and morphological changes were observed under inverted phase contrast microscope. Immunocytochemistry, immunofluorescence and Western blotting were used to evaluate the expressions of Nestin, which was a specific sign of nerve precursor, neuro-specific enolase and MAP-2, which was a specific sign of nerve cell, and GFAP, which was a specific sign of neuroglial cells. MAIN OUTCOME MEASURES: Nestin, which was a specific sign of nerve precursor, neuro-specific enolase and MAP-2, which was a specific sign of nerve cell, and GFAP, which was a specific sign of neuroglial cells. RESULTS: On the 3rd day of culture, partial hADASC started deformation from slender shuttle-shape cells to neuron-like cells. It suggested that cells stretched out apophysis, which were mainly double-pole or multiple-pole cells. Five days later, immunohistochemical detection suggested that expression of Nestin (10.5±0.037) was found out in cells; meanwhile, expressions of GFAP (38.4±0.052) and neuro-specific enolase (NSE) (15.7±0.023) were also found out in cells; however, expression of MAP-2 was not observed. Western blot indicated that, 5 days after effect of HCAM, Nestin was found out in hADASC; meanwhile, expressions of GFAP and neuro-specific enolase were also found out; however, expression of MAP-2 was not observed. CONCLUSION: HCAM can induce the differentiation from hADASC to neuron-like cells in vitro.     

Effects of human amniotic fluid on cartilage regeneration from free perichondrial grafts in rabbits.

After the chondrogenic potential of free grafts of perichondrium was shown in several experimental studies, perichondrium has been used to reconstruct cartilage tissue in various clinical situations. This study investigates the effects of human amniotic fluid on neochondrogenesis from free perichondrial grafts in a rabbit model. Since this fluid contains high concentrations of hyaluronic acid, hyaluronic acid-stimulating activator, growth factors, and extracellular matrix precursors during the second trimester, it may have a stimulating effect on neochondrogenesis. Perichondrial grafts, measuring 20 x 20 mm2 were obtained from the ears of 144 New Zealand young rabbits and were sutured over the paravertebral muscles. The rabbits were randomly divided into three groups with 48 rabbits per group. In group 1, 0.3 ml human amniotic fluid, and in group 2, 0.3 ml saline were injected underneath the perichondrial grafts. Group 3 formed the control group in which no treatment was given. Histologically, neochondrogenesis was evaluated in terms of cellular form and graft thickness at 2, 4, 6, and 8 weeks after surgery. In group 1, the mature cartilage was generated quickly and the cartilage plate in this group was significantly thick and extensive when compared with groups 2 and 3 at 8 weeks ( p<0.05 ANOVA). In conclusion, our study shows that human amniotic fluid enhances neochondrogenesis from free perichondrial grafts. The rich content of hyaluronic acid and growth factors possibly participate in this result.     

Clinical report of cervical arthroplasty in management of spondylotic myelopathy in Chinese

Objectives  

To investigate clinical effects and manual operational point of Bryan cervical disc prosthesis in Chinese, to observe the stability and range of movement (ROM) post-operatively.     

ULTRASTRUCTURAL INVESTIGATION ON THE ARTICULAR CARTILAGE FROM RABBIT KNEE JOINT AFTER IMMOBILIZATION IN CAST

The articular cartilages from the left knee of 30 rabbits immobilized in casts in functional position were studied under transmission electron microscope. The pathological changes which begin at early stage of immobilization included both degeneration and repair of cartilage. The striking morphological features observed were: (1) most chondrocytes in various layers of cartilage underwent progresive degeneration; (2) the concomitant abnormal proliferation of some chondrocytes happened in a brief period. The changes in mechanical stress caused by immobilization affected the nutrition of cartilage and finally led to its reactive structural reformation.     

大肠癌旁粘膜细胞的PCNA和AgNORs表达观察

用增殖细胞核抗原（ＰＣＮＡ）和核仁组成区嗜银蛋白（ＡｇＮＯＲｓ）对３５例大肠癌旁粘膜进行细胞增殖表达与观察。结果表明：癌旁粘膜的ＰＣＮＡ标记指数增多，标记增强，排列紊乱。ＡｇＮＯＲｓ在癌旁粘膜中，颗粒增多、增大，形态多样，０￣１ｃｍ和２￣３ｃｍ组的标记指数与４￣５ｃｍ组的标记指数相比较，有显著或非常显著差异（Ｐ〈０．０５或Ｐ〈０．０１）。在ＤｕｋｅＡ、Ｂ期中，细胞标记指数增高增强，与癌的发生和患者     

Breath-actuated inhalers in chronic asthma: comparison of Diskhaler and Turbohaler for delivery of beta-agonists.

An open, randomized, cross-over study was performed to compare the efficacy and acceptability of two breath-actuated inhalers, the Turbohaler (T) and Diskhaler (D), for delivery of beta-agonists. Thirty six adults with chronic asthma requiring beta-agonists four times daily were treated with terbutaline 500 micrograms via T and salbutamol 400 micrograms via D four times daily, each period lasting four weeks. Additional bronchodilator via pressurized aerosol was permitted as required. Peak expiratory flow (PEF) was recorded in the morning (before and after beta-agonist) and in the evening. The mean morning PEF was higher during the first two weeks using T (295 l.min-1) than whilst using D (281 l.min-1, p < 0.01), but this difference did not persist during the second two weeks and there were no differences in post-bronchodilator PEF or rescue beta-agonist use. After four weeks, > 90% of patients used both inhaler devices efficiently and they were equally acceptable in terms of ease of use and convenience to carry. The Diskhaler and Turbohaler achieve similar clinical efficacy for delivery of beta-agonists.     

Electron microscopical demonstration of horseradish peroxidase by use of tetramethylbenzidine as chromogen and sodium tungstate as stabilizer (TMB-ST method): a tracing method with high sensitivity and well preserved ultrastructural tissue.

Until now methods using tetramethylbenzidine (TMB) for electron microscopy (TMB-EM methods) are all unable to provide a maximum demonstration of transported horseradish peroxidase (HRP) while maintaining good ultrastructural tissue preservation. In order to solve this problem, we have attempted to adapt a newly developed, highly sensitive TMB method using sodium tungstate (ST) as the stabilizer (TMB-ST method) for HRP electron microscopic retrograde and anterograde fiber tracing. The present study shows that the TMB-ST method combined with diaminobenzidine-cobalt (DAB-Co) is more sensitive than existing TMB-EM methods and that ultrastructural details are well preserved with this combined method. The resultant reaction product complex after osmication is stable and is observed as characteristic crystal-like structures which are extremely electron dense and often aggregated into clumps. In contrast, the TMB-ST method without the DAB-Co step frequently produces a moderate electron-dense reaction product. Therefore, we recommend the TMB-ST method combined with DAB-Co for HRP electron microscopy.     

静脉内毒瘾者HIV感染的转归及影响因素

对ＨＣＶ血清标记阳性的静脉内毒瘤者进行半年和１５个月随访，并调查影响转归的部分因素。结果显示，静脉内毒瘾者抗－ＨＣＶ自然转阴率分别为１１．０／和３３．３％。单因素和多因素分析均提示转阴率以婚姻状况良好的已婚者较离婚者高、人均年收入高者较低者高，说明婚姻状况和人们的经济水平对毒瘾者抗－ＨＣＶ转阴有一定的影响。