荨麻疹外周血T淋巴细胞及亚群的检测

目的:探讨荨麻疹患者的细胞免疫功能。方法:对60例荨麻疹患者用流式细胞仪检测外周血T淋巴细胞及其亚群,并与40例健康志愿者作对照。结果:荨麻疹患者CD_3~+及CD_4~+细胞明显降低,与健康对照组比较差异有非常显著性意义(P<0.01),其中以急性荨麻疹患者改变最为明显。结论;荨麻疹患者存在着T淋巴细胞免疫功能紊乱现象,在荨麻疹的发病中,不但有体液免疫参与,而且细胞免疫在荨麻疹的发病中亦有一定的作用。     

复方倍他米松穴位注射与维A酸类药物联合治疗重症痤疮31例

20 0 1年 6月～ 2 0 0 3年 6月我们采用复方倍他米松 (得宝松 )穴位注射与维A酸类药物联合疗法治疗重症痤疮患者 3 1例 ,疗效满意。1 .资料与方法 :共收治 62例重症痤疮患者 ,男 5 7例 ,女5例 ,1 8～ 3 0岁 ,平均 2 2岁 ,病程 5个月～ 7年 ,平均 1 8年。临床症状和体征符合结节、囊肿、聚合性痤疮诊断标准 ,按Pillsbury分级属于重度症状[1 ] 。排除维A酸过敏或入选前3周内使用过维A酸类药物和长效糖皮质激素者 ,妊娠、哺乳期妇女 ,2年内有生育愿望者。62例患者随机分为两组各 3 1例 ,治疗组口服维胺脂2 5～ 5 0mg ,3次 /d ,罗红霉素 1 5 …     

全反式维A酸、阿维A和他扎罗汀对人黑色素瘤细胞A375凋亡和Bax/Bcl-2蛋白表达的影响及意义

目的 探讨全反式维A酸(ATRA)、阿维A及他扎罗汀对人黑色素瘤细胞A375凋亡及Bax/Bcl-2蛋白表达的影响及其意义。方法 采用体外培养和流式细胞仪检测细胞凋亡(AnnexinV-PI法),SABC免疫细胞化学方法检测细胞Bax/Bcl-2蛋白表达情况。结果 浓度均为10^-5mol/L的ATRA、阿维A及他扎罗汀能不同程度地诱导了人黑色素瘤细胞A375凋亡,其中阿维A作用最为显著,凋亡率13.42%,明显高于对照组、ATRA及他扎罗汀组(均P<0.05);其次为ATRA(5.03%,明显高于对照组及他扎罗汀组,P<0.05)和他扎罗汀组(凋亡率2.88%)。3种维A酸亦使A375细胞Bax蛋白阳性表达增强而Bcl-2蛋白阳性表达减弱(P<0.05),其中阿维A作用最强,其次为ATRA和他扎罗汀。结论 维A酸促进A375细胞凋亡可能部分通过以线粒体为核心的凋亡途径。阿维A可能是防治黑色素瘤的有效药物。     

姜黄素诱导人黑色素瘤A375细胞凋亡以及对c-myc、caspase-3表达的影响

目的 探讨姜黄素诱导人黑色素瘤A375细胞凋亡及其对c-myc、Caspase-3表达的影响。方法 姜黄素处理A375细胞,MTT法检测细胞的生长活性,应用倒置显微镜和透射电镜进行形态学观察,采用AnnexinV/PI双染法和DAN片段化分析检测细胞凋亡,SABC免疫组化法和原位杂交检测细胞内c-myc、Caspase-3表达水平。结果 姜黄素能抑制A375细胞增殖,并呈剂量和时间依赖性。经30 μmol/L姜黄素处理A375细胞48h,细胞呈现凋亡形态学改变;DAN片段化分析可见到明显的DNA梯带形成;流式细胞仪定量检测出20 μmol/L以上浓度姜黄素诱导细胞凋亡的发生率较对照组有显著性差异。c-myc表达水平减少,而Caspase-3表达增加。结论 姜黄素能抑制A375细胞增殖和诱导其凋亡,c-myc和Caspase-3基因可能参与凋亡过程。     

Effects of ATRA, Acitretin and Tazarotene on Growth and Apoptosis of Tca8113 Cells

Summary：To investigate the effects of ATRA, acitretin and tazarotene on the growth and apoptosis of human tongue squamous cell carcinoma cell line Tca8113. The effect of retinoids on growth of Tca8113 cells in vitro was examined by MTT assay and Trypan blue exclusion assay. Cell cycle analysis, early apoptosis analysis with double staining with Annexin V-FITC and PI, and active caspase-3 analysis with the staining of FITC-conjugated monoclonal rabbit anli-active caspase-3 antibody were made by flow cytometer. Streptavidin-biotin complex （SABC） immunocytochemical assays were employed for the detections of Bax/Bcl-2 proteins expressions. Our results showed that the retinoids inhibited growth of Tca8113 cells in a dose-and time-dependent manner with maximal inhibition 24 h after treatment of 10 5 mol/L. 10^-5 mol/L retinoids altered cell cycle distribution of Tca8113 cells, revealing an increase in G0/G1-phase population, a decrease in S-phase population and the inhibition of G1/S switching. 10^-5 mol/L retinoids significantly induced apoptosis of Tca8113 cells （all P〈0.05）, elevated the cells population with detectable active caspase-3 （P〈 0.05 for all）, increased the number of cells forming Bax and decreased the number of cells forming Bcl-2 significantly （all P〈0.05）. Acitretin played a most prominent role among the retinoids. It is concluded that the inhibition of cell cycle progress of Tca8113 cells by ATRA, acitretin and tazarotene is one of the possible mechanisms for proliferation arrest of TcaS113 cells elicited by the retinoids. The retinoids mediate apoptosis in TcaS113 cells that may be caspase-dependent through mitochondria pathway. High concentration retinoids inhibit growth of Tca8113 cells in vitro by interfering with proliferation and inducing apoptosis of cells. Acitretin may be an alternative medicine for the prevention and treatment of tongue squamous cell carcinoma.