通心络胶囊对原发性高血压病病人内皮功能的影响

目的探讨通心络胶囊对原发性高血压病病人内皮功能的影响。方法选取高血压病病人72例,随机分为常规治疗组(36例)及通心络组(36例),两组用药疗程均为8周。实验前后分别测定血清一氧化氮(NO)、内皮素(ET)及血清脂蛋白,并采用超声测量肱动脉血流介导的舒张反应(EDD)。结果两组治疗后血清NO,EDD较治疗前明显升高,血清ET浓度下降(P<0.05)。与常规治疗组相比,通心络组NO,EDD治疗后升高更显著(P<0.05)。结论常规降压治疗基础上应用通心络胶囊可进一步改善高血压病病人的内皮舒张功能。     

Articular cartilage repair using dedifferentiated articular chondrocytes and bone morphogenetic protein 4 in a rabbit model of articular cartilage defects

OBJECTIVE: To observe redifferentiation of dedifferentiated chondrocytes after transplantation into the joint, and to evaluate the ability of dedifferentiated chondrocytes transduced with adenovirus containing bone morphogenetic protein 4 (BMP-4) to redifferentiate in vitro and in vivo in a rabbit model of articular cartilage defects. METHODS: Monolayer and pellet culture systems were used to evaluate the redifferentiation of dedifferentiated chondrocytes transduced with BMP-4. A rabbit model of partial-thickness articular cartilage defects was used to evaluate cartilage repair macroscopically and histologically, 6 and 12 weeks after transplantation with first-passage, fifth-passage, or transduced fifth-passage chondrocytes. Histologic grading of the repaired tissue was performed. Expression of BMP-4 and the ability of transplanted cells to recover a chondrocytic phenotype were also assessed. RESULTS: BMP-4--expressing dedifferentiated chondrocytes recovered a chondrocytic phenotype in vitro. After transplantation into the joint, some of the dedifferentiated chondrocytes in the defect sites could undergo redifferentiation and formed matrix that displayed positive toluidine blue staining for glycosaminoglycans. Histologic scores of the regenerative tissue revealed significantly better cartilage repair in rabbits transplanted with BMP-4--expressing cells than in the other treatment groups. Staining with toluidine blue revealed expression of BMP-4 in the cells and in the matrix surrounding the cells. CONCLUSION: Some dedifferentiated chondrocytes can redifferentiate after transplantation into the load-bearing joint. BMP-4 can be used to induce redifferentiation of dedifferentiated chondrocytes in vitro and in vivo, which could help enhance articular cartilage repair.     

慢性肾衰竭患者高同型半胱氨酸血症、氧化应激和微炎症反应间的关系及其在动脉粥样硬化中的作用

目的　探讨同型半胱氨酸 (Hcy)血症和氧化应激、微炎症反应之间的关系 ,及其在慢性肾衰竭 (CRF)患者动脉粥样硬化 (AS)形成中的作用。方法　测 114例CRF患者 (CRF组 ,其中 6 2例行血液透析 ,非透析治疗 5 2例 )和 37例健康对照者 (健康对照组 )血浆总Hcy(tHcy)水平、循环丙二醛 (MDA)、谷胱苷肽过氧化物酶活性 (GSHPx)及血清C 反应蛋白 (CRP)、白细胞介素 (IL) 6、肿瘤坏死因子 (TNF)α水平 ,高分辨超声技术测颈动脉内膜 中层厚度 (IMT)及粥样硬化斑块。结果　非透析CRF患者血浆tHcy、MDA、CRP和TNFα水平高于健康对照组 ,且随肾功能损害程度的加重而升高 ,GSHPx则低于健康对照组 ;血液透析患者tHcy、MDA、CRP、IL 6和TNFα水平均高于非透析患者 ,GSHPx进一步降低。CRF患者IMT增厚阳性率、平均IMT及颈动脉粥样斑块检出率明显高于健康对照组。动脉病变越重 ,血浆tHcy、MDA及CRP水平越高 ,GSHPx越低。多因素逐步回归分析显示 ,tHcy、MDA、CRP、血糖和极低密度脂蛋白水平是影响颈总动脉IMT的危险因素 (R2 =0 5 72 ,P<0 0 0 1) ,影响CRF患者血浆MDA水平的因素有血浆GSHPx、tHcy、血肌酐 ,影响CRF患者血清CRP水平的因素有血清IL 6、TNFα、MDA、血浆白蛋白。结论　Hcy血症可能参与了CRF患者氧化应激的发生     

1686例慢性乙型肝炎中HBeAg阴性与阳性患者临床和病毒学特点比较分析

目的通过大样本横断面回顾性调查,了解HBeAg(-)和HBeAg( )两类慢性乙型肝炎(CHB)患者临床相关因素的异同。方法对1686例CHB患者的住院病历进行回顾性调查,分析HBeAg(-)和HBeAg( )CHB患者ALT、HBV DNA定量、肝组织病理(炎症及纤维化)等指标的组内和组间差异。结果HBeAg(-)CHB628例,占37·3%;HBeAg( )CHB1058例,占62·7%。HBeAg( )组ALT、HBV DNA总体上均高于HBeAg(-)组。HBeAg( )组肝组织炎症及纤维化程度总体上均轻于HBeAg(-)组。结论目前我国CHB病例以HBeAg( )者占多数。无论HBeAg(-)或HBeAg( )CHB,肝炎活动在病毒复制活跃时均重于病毒复制水平较低时。HBeAg(-)CHB肝组织学损害重于HBeAg( )CHB。     

保护性自噬对5-FU诱导的胃癌细胞凋亡的抑制作用

目的:明确5-FU处理胃癌MGC803细胞后自噬的存在,并探讨自噬在5-FU诱导凋亡中的作用.方法:5-FU处理胃癌MGC803细胞.MTT检测细胞增殖能力.流式细胞术检测细胞凋亡.Western blot检测蛋白表达.荧光显微镜观察自噬的发生.结果:0.1-1000mg/L的5-FU作用MGC803细胞48h,抑制细...     

Preparation of biomimetic non-iridescent structural color based on polystyrene–polycaffeic acid core–shell nanospheres

Caffeic acid (CA), as a natural plant-derived polyphenol, has been widely used in surface coating technology in recent years due to its excellent properties. In this work, caffeic acid was introduced into the preparation of photonic band gap materials. By controlling the variables, a reasonable preparation method of polystyrene (PS) @polycaffeic (PCA)–Cu(ii) core–shell microspheres was achieved: 1 mmol L⁻¹ cupric chloride anhydrous (CuCl₂), 3 mmol L⁻¹ sodium perborate tetrahydrate (NaBO₃·4H₂O), 2 mmol L⁻¹ CA and 2 g L⁻¹ polystyrene (PS) were reacted at 50 °C for 10 min to prepare PS@PCA–Cu(ii) core–shell microspheres through rapid oxidative polymerization of CA coated PS of different particle diameters. The amorphous photonic crystal structure was self-assembled through thermal assisted-gravity sedimentation, resulting in structural color nanomaterials with soft and uniform color, no angle dependence, stable mechanical fastness and excellent UV resistance.

Caffeic acid (CA), as a natural plant-derived polyphenol, has been widely used in surface coating technology in recent years due to its excellent properties.     

CDP-c、硫酸镁联用对大鼠短暂脑缺血的神经保护作用

目的 研究胞二磷胆碱（CDP-c）、硫酸镁联用对大鼠试验性短暂局灶脑缺血的神经保护作用.方法 用大脑中动脉栓塞（MCAO）法制作短暂性（90min）局部脑缺血模型,观察CDP-c、硫酸镁单用及不同剂量联用7d后,Caspase-3阳性细胞数、神经功能缺损及脑梗死体积的变化.结果 和对照组相比,CDP-c、硫酸镁单用及两药联用组脑梗死体积较小,Caspase-3表达细胞数较少,并有统计学意义.两药联用组脑梗死体积均比单用组小,Caspase-3表达细胞数亦较两药单用组少（P＜0.05）.两药联用组相比各项指标均无显著意义（P＞0.05）.结论 CDP-c和硫酸镁单用对试验性短暂脑缺血模型可能具有神经保护作用.CDP-c与硫酸镁合用对短暂性试验性局灶脑缺血的神经保护可能有协同作用,并且可以减少各药的用量.     

复发性脑膜瘤术前评估与术中处理

目的探讨脑膜瘤复发手术方法。方法1998年10月以来我院收治复发性脑膜瘤12例,对术前组织病理、CT、MRI及术中所见进行回顾性分析,总结。结果12例病人均行手术治疗,术后随访,无再次复发。结论手术是治疗复发性脑膜瘤的重要手段,完整切除肿瘤、术中化疗是减少复发的关键。     

标准外伤大骨瓣开颅术在重型颅脑损伤中的应用

目的 探讨及评价标准大骨瓣开颅术在交通事故性重型颅脑损伤中的应用价值.方法 采用标准大骨瓣开颅术治疗交通事故后46例重型颅脑损伤患者,对其相关的临床资料进行分析总结,3个月后采用GOS评定治疗效果.结果 随访3个月后,患者恢复良好23例,中残5例,重残或植物生存8例,死亡10例.结论 标准外伤大骨瓣手术是治疗交通事故性重型颅脑损伤的有效方法,它具有操作方便、彻底减压的优点,能明显提高治愈率,减轻后遗症,提高患者生存质量.     

Effect of Bacillus subtilis,Enterococcus faecium,and Enterococcus faecalis supernatants on serotonin transporter expression in cells and tissues

BACKGROUND Bacillus subtilis(B.subtilis),Enterococcus faecium(E.faecium),and Enterococcus faecalis(E.faecalis)are probiotics that are widely used in the clinical treatment of irritable bowel syndrome(IBS).Whether the supernatants of these three probiotics can improve gastrointestinal sensation and movement by regulating the serotonin transporter(SERT)expression needs to be clarified.AIM To investigate whether B.subtilis,E.faecium,and E.faecalis supernatants can upregulate SERT expression in vitro and in vivo.METHODS Caco-2 and HT-29 cells were stimulated with probiotic culture supernatants for 12 and 24 h,respectively.A male Sprague-Dawley rat model of post-infectious irritable bowel syndrome(PI-IBS)was established and the rats were treated with phosphate-buffered saline(group A)and three probiotics culture supernatants(groups B,C,and D)for 4 wk.The levels of SERT were detected by quantitative PCR and western blotting.RESULTS The levels of SERT at post-treatment 12 and 24 h were significantly elevated in Caco-2 cells treated with B.subtilis supernatant compared with those in the control group(aP<0.05).Those levels were markedly upregulated in Caco-2 cells stimulated with E.faecium and E.faecalis supernatants at 24 h(aP<0.05).In addition,SERT expression in groups B,C,and D was significantly higher than that in group A in the 2nd wk(aP<0.05).Increased SERT expression was only found in group D in the 3rd wk(aP<0.05).However,there was no significant difference in SERT expression between the groups in the last week(P>0.05).CONCLUSION The supernatants of B.subtilis,E.faecium,and E.faecalis can upregulate SERT expression in intestinal epithelial cells and the intestinal tissues in the rat model of PI-IBS.