sFRP、WIF-1、CD133、CD44在食管癌组织中的表达及其临床意义

目的：探讨sFRP、WIF-1、CD133、CD44在食管癌中的表达与临床病理特征之间的关系,为食管癌的研究提供新思路。方法选取2013年1月-2013年8月经手术切除的食管癌标本40例,术后病理均证实为食管癌患者,采用RT-PCR方法分析sFRP（分泌型卷曲相关蛋白）、WIF-1（Wnt抑制因子-1）、CD133（白细胞分化抗原分化群第133号）、CD44（白细胞分化抗原分化群第44号）的表达情况,应用SPSS 14.0统计软件进行数据分析,采用χ2检验统计方法。结果 sFRP、WIF-1、CD44、CD133基因在食管癌组织阳性表达率为32.50%,42.50%,60.00%,72.50%,在癌旁组织阳性表达率为65.00%,70.00%,37.50%,47.50%。 CD44、CD133基因在食管癌组织中表达水平高于癌旁组织（P〈0.05）,sFRP、WIF-1基因则在食管癌组织中表达水平低于癌旁组织（P〈0.05）,差异有统计学意义。结论sFRP、WIF-1在食管癌组织中表达低于癌旁组织,CD44、CD133在食管癌组织中表达高于癌旁组织。 sFRP、WIF-1基因低表达及CD44、CD133基因高表达可能与食管癌的发生、发展有关。     

Biological characteristics of a cell subpopulation in tongue squamous cell carcinoma

Oral Diseases (2012) 18 , 169–177 Objectives: To isolate the CD133+CD44+ cells from human tongue squamous cell carcinoma (TSCC) Tca8113 cell line and investigate biological characteristics of them. Materials and methods: Immunomagnetic microbeads were applied to sort the CD133+CD44+ cells. Flow cytometry was used to detect isolation purity. The proliferation, clone‐formation efficiencies, invasion and migration, gene expressions, and tumor‐formation abilities were analyzed among CD133+CD44+, CD133?CD44?, and total population of cells. Results: The average purities of CD133+ and CD44+ cells reached 97.3% and 98.7%, respectively. The proliferation of CD133+CD44+ cells was significantly higher than the other two groups. The clone‐forming efficiency of three groups was 70%, 8%, and 14%, respectively. The average invaded and migrated cell numbers of CD133+CD44+ and total population cells were 132 and 36.2, 311.6, and 156.2, respectively. The expressions of Bcl‐2 and Sox2 in CD133+CD44+ cells were significantly higher than those in total population cells. A total of 10⁴ CD133+CD44+ cells could form secondary tumors in nude mice, while the total population group needed 10⁶ cells. Conclusions: The CD133+CD44+ subpopulation cells possess stem‐like characteristics. They appear to be the potential targets for future biology therapy of human TSCC.     

Grosor íntima-media carotídeo en población española: valores de referencia y asociación con los factores de riesgo cardiovascular

Introduction and objectives

Carotid intima-media thickness as measured with ultrasonography is an inexpensive and noninvasive predictor of cardiovascular events. The objectives of this study were to determine the population reference ranges of carotid intima-media thickness for individuals aged 35-84 years in Spain and to analyze the association of carotid intima-media thickness with cardiovascular risk factors (age, smoking, diabetes, pulse pressure, lipid profile, and body mass index).

Methods

Population-based cross-sectional study conducted in Gerona (Spain). We described the mean and maximal values of carotid intima-media thickness of the carotid artery and of its 3 segments (common carotid, carotid bulb and internal carotid). We assessed cardiovascular risk factors and analyzed their association with carotid intima-media thickness using adjusted linear regression models.

Results

A total of 3161 individuals (54% women) were included, with mean age 58 years. Men showed significantly higher mean common carotid intima-media thickness than did women (0.71 vs 0.67 mm). The strongest predictors of this measure were age (coefficients for 10-year increase: 0.65 and 0.58 for women and men, respectively), smoking in men (coefficient: 0.26), high-density lipoprotein cholesterol in women (coefficient for 10 mg/dL, increase: −0.08) and pulse pressure in both sexes (coefficients for 10 mmHg increase: 0.08 and 0.23 for women and men, respectively). The results were similar for the mean carotid intima-media thickness of all the segments.

Conclusions

This population-based study presents the reference ranges for carotid intima-media thickness in the Spanish population. The main determinants of carotid intima-media thickness were age and pulse pressure in both sexes.Full English text available from:www.revespcardiol.org     

不同转移潜能肝癌细胞株中CD标志物的表达差异及意义

目的探讨不同转移潜能的肝癌细胞株中几种CD标记物的表达差异及其意义,为进一步利用CD分子标志物分离多潜能肝癌干细胞奠定基础。方法常规培养三种不同转移潜能的肝癌细胞株HepG2、MHCC-97H、SK-HEP-1,胰酶消化获得单细胞悬液后,经流式抗体染色,通过流式细胞仪分析三种肝癌细胞株中CD133、CD90、CD44、CD34、CD24的表达差异及意义。结果 CD133+细胞在HepG2细胞株仅占0.1%,而在MHCC-97H、SK-HEP-1细胞中表达也较低;CD90+、CD44+、CD90+CD44+表达水平随细胞转移潜能的增加呈递增趋势(P<0.05)。CD44+CD24+在HepG2、MHCC-97H、SK-HEP-1细胞中的阳性表达率分别为0.05%、10.3%和0.3%(P<0.05);三者中均无CD34+和CD133+CD90+细胞表达。结论 CD90和CD44与肝癌细胞的转移潜能有一定的相关性,可能成为潜在的肝癌肿瘤干细胞标记物。     

基质细胞源性因子-1α/CXC趋化因子受体-4轴经PI3K/Akt通路对胃癌细胞CD133表达的调控作用

目的 观察胃癌中基质细胞源性因子-1α/CXC趋化因子受体-4(SDF-1α/CXCR4)轴经由PI3K/Akt信号通路对下游分子CD133表达及其活性的影响.方法 免疫细胞化学染色检测胃癌KATO -Ⅲ细胞株中CXCR4、Akt、p-Akt及CD133的表达.分别用SDF-1α、AMD3100及LY294002作用于胃癌KATO -Ⅲ细胞株,半定量酶链聚合反应(PCR)检测CXCR4 mRNA和CD133mRNA的表达变化,蛋白免疫印迹法检测CXCR4、Akt、p-Akt及CD133蛋白的表达变化.结果 免疫细胞化学染色证实KATO -Ⅲ细胞呈CXCR4、Akt、p-Akt及CD133阳性表达.SDF-1α组中,CXCR4蛋白(0.980±0.083)、p-Akt蛋白(0.770±0.071)及CD133蛋白(0.890±0.078)表达与对照组(0.750±0.042、0.680±0.038、0.720±0.034)比较明显增高(P＜0.05).与对照组(0.540±0.036、0.520±0.034)比较,CD133 mRNA(0.890±0.061)表达明显增高(P＜0.05).AMD3100组与对照组(0.750±0.042、0.680±0.038、0.720 ±0.034)比较,CXCR4蛋白(0.430±0.055)、p-Akt蛋白(0.350±0.050)及CD133蛋白(0.110±0.060)表达显著下降(P＜0.05).LY294002组中,p-Akt蛋白(0.100 ±0.033)、CD133蛋白(0.440±0.055)表达与对照组(0.680±0.038、0.720±0.034)比较显著下降(P＜0.05).同时,与对照组(0.540±0.036)比较,CD133mRNA(0.310±0.021)表达差异有统计学意义(P＜0.05).结论 刺激或抑制SDF-1α/CXCR4轴可经由PI3K/Akt信号通路上调或下调CD133表达.     

体外培养脑胶质瘤细胞株中CD133表达的研究

目的 探讨与脑胶质瘤干细胞相关的CD133表型.方法 将无血清培养中的胶质瘤干细胞与含血清贴壁培养的胶质瘤细胞中CD133的表达进行对比.逆转录-聚合酶链反应(RT-PCR)及实时荧光定量PCR检测信使RNA(mRNA)水平的表达,流式细胞术及免疫荧光染色法检测蛋白水平的表达,激光共聚焦扫描成像进行CD133蛋白的亚细胞定位.结果 所有胶质瘤细胞中均存在CD133 mRNA及蛋白的表达.AC133抗体所识别的糖基化CD133-AC133分子仅分布于无血清培养中的胶质瘤干细胞,阳性细胞比例为31.8％ ～99.9％,且定位于此类细胞膜表面.AC133阴性的胶质瘤干细胞及含血清贴壁培养胶质瘤细胞中CD133蛋白的表达位于细胞内,阳性细胞比例约为22.2％～88.6％,其亚细胞定位为内质网和/或高尔基体.结论 细胞表面AC133分子,而非CD133 mRNA及细胞内CD133蛋白标记了一类胶质瘤干细胞亚群,但无血清培养环境下也存在AC133呈阴性表达的胶质瘤干细胞亚群.     

小剂量纳洛酮联合阿片类药物应用的研究进展

背景 阿片类镇痛药在临床应用有着重要的地位,但有恶心、呕吐、瘙痒、呼吸抑制等不可忽视副作用,长期应用还可产生耐受和依赖.有研究表明,阿片类镇痛药联合应用小剂量的阿片类受体拮抗剂可以明显增强吗啡等阿片类镇痛药的效能,并且同时减弱由其产生的副作用以及耐受和依赖.目的 拟通过综述的方式,系统地阐述小剂量纳洛酮联合应用阿片类药物的研究现状以及进展,为今后该方向的研究提供参考,进而启发新的研究思路.内容 对阿片类镇痛药联合小剂量纳洛酮应用的基础及临床研究现状和进展以及小剂量纳洛酮增强阿片类镇痛药的镇痛作用、减轻其副作用及耐受和依赖的形成机制进行综述. 趋向 从近期研究可见,该方向的研究已不仅限于观察小剂量纳洛酮与吗啡的联合应用所产生的作用,小剂量纳洛酮和其他阿片类药物联合应用的研究也逐步展开,并有越来越多的研究者对二者联合应用所产生的作用机制进行了更为深入的探讨.     

人脑胶质瘤中MMP-9、CD133蛋白的表达及临床意义

目的 探讨人脑胶质瘤中基质金属蛋白酶-9（MMP-9）、肿瘤干细胞标志物CD133蛋白的表达及临床意义.方法 采用免疫组织化学方法检测66例不同级别胶质瘤组织标本及15例正常脑组织标本中MMP-9、CD133蛋白表达.结果 人脑胶质瘤标本中MMP-9、CD133蛋白表达明显升高;CD133及MMP-9蛋白总的阳性细胞表达率随着胶质瘤病理级别的增加而增高（P〈0.01）;人脑胶质瘤中CD133蛋白的阳性细胞表达率和MMP-9蛋白阳性细胞表达率成正相关（P〈0.01）.结论 人脑胶质瘤中MMP-9、CD133蛋白的表达与脑胶质瘤的恶性程度密切相关;可能在脑胶质瘤的侵袭性生长、复发和转移过程中起协同作用.