系统性红斑狼疮患者高表达的CD154促进自身抗体分泌

目的】探讨系统性红斑狼疮（SLE）患者外周血单个核细胞（PBMC）CD154表达水平、及CD40/CD154对SLE患者分泌自身抗体的影响和地塞米松（Dex）对此的作用。【方法】选择SLE活动期患者（10例）和正常对照者（11例）,分离PBMC,检测其CD154的表达水平;培养PBMC,应用CD40 mAb和Dex进行干预,使用ELISA法检测培养液上清抗dsDNA水平。【结果】①活动期组PBMC CD154表达水平明显高于对照组6.4%±2.1%vs 1.5%±1.2%,（P〈0.05）;②活动期组培养液上清抗dsDNA抗体水平明显高于对照组[（11.8±6.8）U/mL vs（5.6±2.3）U/mL（RPMI 1640）,（11.4±7.0）U/mL vs（6.3±2.1）U/mL（IgG）,P均〈0.05];③CD40 mAb使两组培养液上清抗dsDNA抗体水平明显增高[活动期组：（18.6±7.7）U/mL vs（11.8±6.9）U/mL,对照组：（8.3±4.4）U/mL sv（5.6±2.3）U/mL,P均〈0.05]。④在活动期组,Dex明显抑制CD40 mAb引起的PBMC培养液上清抗dsDNA抗体水平的增高[（8.8±5.2）U/mL vs（18.6±7.7）U/mL,P〈0.05],使其低于非特异性处理时水平[（8.8±5.2）U/mL vs（11.8±6.8）U/mL,P〈0.05];Dex不影响对照组。【结论】活动期SLE患者PBMC表达的CD154水平升高,此能够促进抗dsDNA抗体的分泌,而Dex能够抑制其作用

Fine Root Biomass and Dynamics of Casuarina equisetifolia Plantations on Coastal Sandy Soil

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建立高频感应等离子体风洞在国内是近几年的事情，因此对风洞内等离子体参数的诊断也刚刚开始。该文论述了利用氩光谱的相对强度法测量高频感应风洞的等离子体温度及其分布的原理装置，并给出了实验结果

Internet Addicts' Impulsivity Based on the Delay Discounting Task

采用经济学延迟折扣任务, 探讨影响大学生网络成瘾的冲动性特征, 为大学生网络成瘾的防治和干预提供依据.采用 Young的网络成瘾诊断问卷, Barratt冲动性量表第十一版(BIS-11), 对93名大学生进行测查, 同时完成延迟折扣实验任务.在延迟折扣实验中, 网络成瘾大学生更加倾向于做出冲动性选择.对于所有延迟强化条件, 网络成瘾者的延迟折扣率均显著高于非网络成瘾大学生, 随着奖赏时间的延迟, 网络成瘾的大学生的折扣率更高.网络成瘾得分与冲动性之间显著正相