人羊膜间充质干细胞移植对大鼠脊髓损伤神经功能恢复的影响

目的 观察人羊膜间充质干细胞( hAD - MSCs)移植对大鼠脊髓损伤神经功能恢复的影响.方法 建立大鼠脊髓全横断损伤模型,脊髓横断后立即以明胶海绵吸附10μl hAD- MSCs(约2×105个)或等量PBS液植入脊髓两断端之间.术后每周应用BBB评分评价大鼠后肢运动功能;采用免疫荧光染色观察hAD - MSCs在脊髓内的存活、分化情况;免疫组织化学染色观察受损脊髓远端组织NF - 200表达.结果 hAD - MSCs移植组神经功能明显恢复,BBB评分逐周增加,与对照组比较差异有统计学意义(P＜0.05).hAD - MSCs植入后2周在宿主脊髓中存在MAB1281染色阳性细胞,但不表达MAP -2和GFAP.hAD - MSCs移植后大鼠受损脊髓远端神经组织NF - 200表达明显强于对照组.结论 hAD - MSCs移植可促进大鼠脊髓损伤后的神经功能恢复,其机制可能与hAD - MSCs促进受损脊髓远端组织表达NF - 200有关.     

人羊膜上皮细胞静脉移植治疗大鼠心肌梗死

背景：人羊膜上皮细胞在体外适当诱导条件下可分化为心肌样细胞,可望成为细胞心肌成形术的种子细胞,但在心肌梗死原位是否能分化成心肌细胞值得探讨。目的：探讨人羊膜上皮细胞移植在心肌梗死原位的分化及对心肌梗死后心室重构和心功能的影响。方法：用胰酶消化分离人羊膜上皮细胞,行流式细胞仪检测和免疫组化染色以鉴定其表型特征。结扎SD大鼠左冠状动脉前降支以建立心肌梗死模型,实验分为人羊膜上皮细胞移植组、模型组及假手术组,人羊膜上皮细胞移植组于造模后1周经舌下静脉移植Brdu标记的人羊膜上皮细胞。移植后1,4,6周采用超声心动图检查心功能变化,应用苏木精-伊红和Masson染色观察心肌重构的变化,以免疫荧光双染色法检测人羊膜上皮细胞在心肌梗死区的植活与分化。结果与结论：①所分离的人羊膜上皮细胞表达CD29、CD166、CD73和CK19,不表达CD44、CD34、CD45、CD80、CD86和HLA-DR。②人羊膜上皮细胞移植后6周,心肌梗死区仍可见Brdu标记的阳性细胞,表达心肌特异蛋白连接蛋白43、α-辅肌动蛋白和结蛋白。③移植组大鼠左心室纤维化程度明显低于模型组。④移植组大鼠射血分数、左室短轴缩短率显著高于模型组（P〈0.01）;舒张期左室前壁厚度和收缩期左室前壁厚度也显著大于模型组（P〈0.05）。提示人羊膜上皮细胞在心肌梗死原位可分化为心肌细胞,可减缓心室重构并改善心脏功能。     

从患者畸胎瘤中分离出甲型副伤寒沙门菌

我们于2008年3月4日从1例右侧卵巢囊性良性畸胎瘤抽出物(脂肪)中分离出甲型副伤寒沙门菌,现报道如下。1病例患者,女,46岁,因腰腹疼痛4 d,于2008年2月27日入院。入院时查体:T37℃,R16次/min,BP110/70 mm Hg,     

气象条件对脑卒中影响的研究进展

气象医学（meteorological medicine）是研究天气及气候对人类健康影响规律的科学,又称医疗气象学。目的是保护人类免受不良气象条件的影响,并利用有利的气象条件增强体质、防治疾病。     

两例结核病患者血液中分离出星形奴卡菌的报道

2003-2008年我科先后从1例住院诊断为陈旧性肺结核和1例诊断为结核性脑膜炎患者的血液中培养分离出星形奴卡菌,现报道如下。1病例1.1病例1患者,男,65岁。因畏寒、发热两月余,查体:体温37.7℃,血压122/76 mm Hg,神志清,精神差,消瘦,咽充血。双肺上部呼吸音粗糙,未闻及干湿啰音笛槭壹?     

浅谈医院环境形象建设

中医药文化是中医医院核心价值观的重要体现,加强中医药文化建设是推动中医药事业发展的重要举措,医院的环境形象是中医药文化的物质载体,是展示和传播中医药文化的重要途径.如何在医院环境形象体系建设中充分彰显中医药文化,突出中医药文化特色,是值得思考的一个问题.     

人下颌下腺干/祖细胞的分离及培养

近年来国内外学者研究证实了唾液腺组织中的确存在一类具有成体干细胞特性的唾液腺细胞,但是这类干细胞的研究多集中在动物的唾液腺,而人类唾液腺干细胞的生物学特征研究较少。 目的：体外分离、培养人唾液腺干/祖细胞,并观察其生物学特征。 方法：从流产胎儿下颌下腺中分离、单克隆培养获得人唾液腺干/祖细胞,应用免疫荧光染色方法检测上皮细胞标志CK19,Laminin的表达,流式细胞术检测CD29,CD90.1和 CD117的表达。绘制人唾液腺干/祖细胞生长曲线,评价体外增殖能力。 结果与结论：人唾液腺干/祖细胞胞浆表达上皮细胞标志CK19及Laminin;流式细胞术结果显示,CD90.1,CD29及CD117的表达率分别为99.69%,98.83%及67.27%;体外培养也表现出高增殖能力、克隆形成能力和较高的传代数等组织干细胞特性。提示人胎儿下颌下腺中能分离出具有组织干细胞特性的细胞。     

人羊膜间充质干细胞在大鼠受损肝组织中分化为肝细胞

背景：羊膜间充质干细胞在体外适当的诱导条件下可分化为肝细胞样细胞,而在受损肝脏原位是否可分化为肝细胞值得探讨。 目的：观察人羊膜间充质干细胞在大鼠肝损伤原位植活及分化情况。 方法：采用胰酶-胶原酶二酶消化法从羊膜组织中分离人羊膜间充质干细胞。采用腹腔注射D-氨基半乳糖建立大鼠肝损伤模型,随机分为2组,人羊膜间充质干细胞移植组造模后注射L-DMEM 悬浮的人羊膜间充质干细胞悬液,对照组注射等量L-DMEM。 结果与结论：①FCM分析结果显示,所分离的人羊膜间充质干细胞表达CD29、CD44和CD166;免疫荧光染色显示人羊膜间充质干细胞表达波形蛋白,不表达CK19。②与对照组比较,人羊膜间充质干细胞移植后肝病理无明显差异,均呈急性肝坏死病理改变。③免疫荧光双染色结果显示,人羊膜间充质干细胞移植后1周主要定植于肝小叶且表达CK19,至2周表达CK18,至3周表达Alb。结果表明,人羊膜间充质干细胞在大鼠受损肝组织中能被植活,且可分化为肝细胞,提示人羊膜间充质干细胞移植在临床肝病的治疗方面可能具有潜在应用价值。     

羊膜间充质干细胞移植治疗急性肾损害

BACKGROUND:Recent researches have reported that bone marrow mesenchymal stem cells transplantation can be used for the treatment of acute kidney injury, and human amnion-derived mesenchymal stem cells have a good therapeutic effect in repairing other tissues and organs injury. OBJECTIVE:To investigate the effect of the human amnion-derived mesenchymal stem cells transplantation on cisplatin-induced acute kidney injury. METHODS:Human amnion-derived mesenchymal stem cells were isolated, cultured and identified in vitro. Male ICR mice were randomly divided into three groups: normal control group, model group, human amnion-derived mesenchymal stem cells group, and mices in the model group and human amnion-derived mesenchymal stem cells group were used to establish acute kidney injury models. In the human amnion-derived mesenchymal stem cells group, 0.3 mL human amnion-derived mesenchymal stem cells with the concentration of 1.0×1010/L were injected into the mice via tail vein at 8 days; mice in the model group and normal control group were injected with normal saline in the same dose. RESULTS AND CONCLUSION:At 17 days after the establishment of cisplatin-induced acute kidney injury model by human amnion-derived mesenchymal stem cells transplantation, renal function examination results demonstrated that compared with model group, the blood urea nitrogen and serum creatinine levels in human amnion-derived mesenchymal stem cells group were significantly increased, and reached to the levels in normal control group. Hematoxylin-eosin staining results showed the clear and complete renal organizational structure with rich tubules in the human amnion-derived mesenchymal stem cells group, the integrity and structure were similar to those of the mice in the normal control group, but the pathological changes of the human amnion-derived mesenchymal stem cells group were significantly improved when compared with model group. At 7 days after human amnion-derived mesenchymal stem cells transplantation, double labeling immunofluorescence results showed there was a large number of humanamnion-derived mesenchymal stem cells colonization and distributionin in the nephridial tissue, a few MAB1281-FITC positive cells derived from human amnion-derived mesenchymal stem cells also found in the epithelium of kidney tubules. The human amnion-derived mesenchymal stem cells transplantation could promote the recovery of acute kidney injury.     

斑秃患者外周血CD4~+ CD25~+ Treg细胞计数及TGF-β_1的表达

目的通过检测斑秃患者外周血中CD4+CD25+Treg细胞计数、转化生长因子-β1(TGF-β1)的表达水平,探讨斑秃的发病机制。方法采用流式细胞技术检测50例未治疗的斑秃患者外周血中CD4+CD25+Treg细胞的水平变化,ELISA法检测血清中TGF-β1含量,并进行相关性分析,以30例健康者作为正常对照。结果斑秃患者组外周血CD4+CD25+Treg细胞占T淋巴细胞的比率和血清TGF-β1浓度均低于正常对照组(P均<0.01),且重型患者组显著低于正常对照与局限型患者组(P<0.01),局限型患者组低于正常对照组(P<0.05)。斑秃患者外周血CD4+CD25+Treg细胞水平,血清中TGF-β1含量均与SALT评分呈显著负相关(r=-0.566,-0.471;P均<0.01),而两者呈显著正相关(r=0.584,P<0.01)。结论斑秃患者外周血中CD4+CD25+Treg细胞与血清中TGF-β1呈一定相关性,且两者与斑秃病情的严重程度相关;CD4+CD25+Treg细胞的数量减少和TGF-β1表达降低可能与斑秃的细胞免疫失调有关。