FasL基因表达对缺氧状态下直肠癌细胞增殖凋亡的影响

Objective To elucidate the effect of FasL gene expression on the proliferation and apoptosis of hypoxic rectal carcinoma cells. Methods The normoxic expression level of FasL in HR-8348 subtype cells (HR-8348B, HR-8348L, HR-8348F and HR-8348As) with different invasive power were verified by Western blot. Hypoxia models for HR-8348B, HR-8348L, HR-8348F and HR-8348As were constructed with chemical modeling, then the FasL levels in all groups at 12 h after hypoxia were quantitated by Western blot. Distribution of different cell life cycles was determined with flow cytometry. Cell reproductive activities were detected with MTT method, and cell apoptesis was assessed with TUNEL. Results FasL protein was pigmentized at the position of 40 000 by Western blot, and the expression level of FasL was significantly higher in HR-8348F cells than those in HR-8348B, HR-8348L and HR-8348As cells(F=361.149, P<0.01) in normoxia. At 12 h after hypoxia, the FasL level was also significantly higher in HR-8348F cells than those in other groups (F=278.766, P<0.01), but was not markedly different as compared to themselves in normoxia (t=1.762, P>0.05). The proliferation index was significantly higher in HR-8348F (60.43±3.72) than those in HR-8348B (40.01±3.30), HR-8348L (41.30±4.06) and HR-8348As cells (35.87±4.39), respectively (F=39.477, P<0.01). However, both inhibition rate of proliferation and apoptotic index were remarkably lower in HR-8348F (17.30±1.98 and 13.10±1.04) than those in HR-834B (33.70±4.33 and 21.60±1.31), HR-8348L (34.20±3.92 and 20.10±1.15), and HR-8348As (38.00±4.55 and 23.90±1.23), respectively (F=28.811 and 76.462, respectively, P<0.01). Conclusion The expression enhancement of intracellular FasL in rectal carcinoma in hypoxia can lead to accelerated proliferation and reduced apeptosis of cells, which will promote tumor cells to adapt microenvironmental hypoxia.     

Extragastrointestinal stromal tumor possibly originating from the prostate

We report a case of extragastrointestinal stromal tumor possibly originating from the prostate. The patient underwent radical prostatectomy because of no metastatic evidence. No recurrence and metastasis have been found during 14 months of follow up. To our knowledge, this may be the third such case published in a report in terms of pathological type.     

高频超声诊断新生儿卵巢增大、并腹股沟疝的临床意义

新生儿期卵巢增大,可形成卵巢囊肿、影响卵巢进入正常位置而形成腹股沟疝,导致小儿性早熟,影响小儿身高及心理发育等。自2006年1月-6月我们连续发现5例新生儿卵巢增大,予以报道。1材料与方法临床资料见表1,应用彩色多普勒超声诊断仪:Philps HD、HDI 5000,高频探头7-10mmHz。行常规下腹部及腹股沟、会阴区扫查。2结果超声检查所见及诊断结果见表1。表1 5例临床资料与超声检查结果比较异及丘脑-垂体-卵巢器质性病变产生过多激素,刺激胎儿卵巢内卵泡增生过大、内液潴溜,是导致卵巢增大的原因[3]。5例新生儿8枚卵巢增大的原因分析,说明胎儿期…     

光敏剂ATX-S10.Na(Ⅱ)在大鼠脑胶质瘤模型不同组织中分布的实验研究

目的探讨新型光敏剂ATX-S10.Na(Ⅱ)在大鼠脑胶质瘤模型不同组织中的分布和代谢。方法在已经建立的SD大鼠C6胶质瘤模型中,经尾静脉注射ATX-S10.Na(Ⅱ)(20mg/kg)。分别于1h、2h、4h、8h、12h和24h后处死并取出大鼠的血液、皮肤、肿瘤组织、瘤周组织以及对侧正常脑组织,应用荧光分光光度计连续测定ATX-S10.Na(Ⅱ)在大鼠C6胶质瘤模型各种组织中的分布和代谢。结果ATX-S10.Na(Ⅱ)的药物浓度于静脉注射2h后在肿瘤组织中达到峰值,以后8h维持在一个持续较高的水平,显著高于对侧正常脑组织及瘤周组织。而正常皮肤和脑组织中也吸收少量的药物,但是它们峰值很低,并且几乎均在4h内完全代谢消失。结论新型光敏剂ATX-S10.Na(Ⅱ)具有优良的胶质瘤组织与正常脑组织的对比度,并且能快速从体内清除。     

试论七情发生和脑主神明与抑郁症病机证治的关系

抑郁症是一组以抑郁心境自我体验为中心的临床症状群或状态.中医多将其归在郁证之类,对其理论解释的重点多是在心主神明论指导下的以五脏为中心的肝,临床治疗亦多遵疏肝解郁这一基本大法,并取得了一定成效.     

大肠侧向发育型肿瘤细胞株双向电泳技术成功建立

目的:建立侧向发育型肿瘤细胞(LST)株双向电泳技术.方法:提取LST细胞株总蛋白质,采用不同pH范围IPG胶条进行LST细胞株总蛋白质双向电泳,并对实验步骤进行一系列的调整优化.结果:获得了较为清晰的LST细胞株双向电泳图谱,采用pH 3～10线性IPG胶条分离出1356±43个蛋白质斑点;pH 4～7 IPG胶条两种上样量(250μg和150μg)分别分离出了1285±51和989个蛋白质斑点.结论:通过相关条件的调整优化,成功建立了双向电泳技术,为研究LST特殊性生物学行为相关蛋白质奠定了坚实的基础.     

人工合成铁（Ⅱ）半胱氨酸SOD模拟物的毒性及血清半衰期研究

本文对人工合成的铁（Ⅱ）半胱氨酸SOD模拟物的毒性及其吸收后血清半衰期进行了初步探索。通过灌胃急性毒性、慢性毒性、遗传毒性和灌胃后吸收入血清的药时变化进行了研究。研究结果表明：此物对小鼠灌胃的LD50为大干5000mg／kg。连续给药1月后，小鼠的心、肝、胸腺、脾、肺、肾和肠胃等脏器在形状、大小和颜色上与正常组织无明显差异；用800mg／kg的剂量给小鼠灌胃7d，小鼠的晴多染红细胞微核率有一定增长（P〈005）；经不同浓度给药后，血清中血药浓度峰值时间为60-210min，半衰期为90-180min，证明此药为微毒物质，适当剂量口服后无明显蓄积毒性，大剂量使用时可导致一定的染色体损伤，血清药浓度半衰期随给药浓度有所变化。此药可望在植物生长调节剂、医药或化妆品、饲料、食品中的抗氧化添加剂及着色抑菌的防腐添加剂等中代替天然SOD。     

Studies of the human oropharyngeal airspaces using magnetic resonance imaging IV--the oropharyngeal retention effect for four inhalation delivery systems.

Magnetic resonance imaging (MRI) of the oropharyngeal region from 20 adult volunteers using four model inhalation devices (varying mouthpiece diameters, airflow resistances) and tidal breathing was carried out. Statistical analysis (convex hull method) selected 12 scans from 80 data sets representing the extremes of all dimensions in the population. Twelve physical mouth-throat models were made by stereolithography using the exact scan data. The aim was to produce models with varying dimensions to span the adult population, and to investigate if oropharyngeal dimensions affected throat retention for different delivery systems. In an in vitro analysis, the models were used to determine the retention effect of the oropharyngeal airspaces when drug aerosols were administered from four inhalation delivery systems: a pressurised metered dose inhaler (pMDI), two different dry powder inhalers (DPIs A and B), and a nebulizer. The aims of this work were to determine the key parameters governing mouth-throat retention and whether retention was dependent on the delivery system used. Characterizing the throat models by measuring 51 different dimensional variables enabled determination of the most influential variables for dose retention for each inhalation delivery system. Throat model retention was found to be dependent on the delivery system (pMDI approximately DPI(A) > DPI(B) > Neb.). The most influential variable was the total throat model volume. Throat models representing high, median, and low oropharyngeal filtration in healthy adults have been identified.     

自体表皮细胞培养与异体真皮组合应用研究

严重烧伤病人皮肤修复中主要未解决的问题是真皮的替代。动物实验结果表明，异体皮移植后５天，用自体培养表皮细胞膜片覆盖真皮床，１４天后复合皮成活率是８４．６％±２．４％。组织学检查证实表皮已形成了复层结构，可见基底层、颗粒层和角质层。临床应用中，异体皮移植后１０天，去除异体表皮覆盖病人的自体培养表皮，３５天后未见排斥征象，异体真皮促进了培养表皮的分层、成熟和完整，组织学检查证实表皮细胞的边缘清楚，已分化形成颗粒层和角质层，真皮多细胞，已血管化，但表皮嵴缺乏。