表达谱基因芯片筛选体外循环前后心肌细胞因子的变化

Objestive Systemic inflarmmation may be triggered by injury, hypothermia, ischemia-reperfusion and the contact of the blood with foreign body during cardiopulmonary bypass (CPB). To determine the application values of gene chip technique in the clinical practice and the study of cardiovascular stagery, as well as to provide clues to the study of inflammatory responess during CPB, microarry for gene expression profiles was used to identify the differences in the gene expression of myocardium between pre-and post- CPB. Methods Six adult patients who underwent CPB from March to May in 2003 were involved. Samples of right atrium were col- lected before and at immediate end of CPB. BD AtlasTM cDNA Expression Arrays was used to identify the differences in the gene ex- pression of cytokines. The results were compared with that of semi-quantative RT-PCR. Resellts The mean age of 6 patients (5 males and 1 female) was (32.67± 11.72) years. The baseline heart function was gradeⅡin 3 cases and grade Ⅲ in 3 other cases. The baseline left ventricular ejection fraction(LVEF)was (58.17±7.91)%. The mere duration was (91.67±43.88) minutes for CPB and was (58.67±43.46) minutes for aorta blocking. The minimum nasopharynx/rectal temperture was (29.37±1.90)℃/ (32.15±1.52)℃. Gene expression profiles of cytokines in the myocardium pre- and post-CPB were analysed successfully. The ex- pression of IL-6, IFN-γ,Wnt5a, TNFRSF1B, a member of tumor necrosis factor receptor superfamily, PIGF and MFNG in the myo- cardium were unpregulated after CPB. Conclusion Microarray technique is applicable in the study of cytokines changes dying CPB. cDNA microarray identified pleliminarily the differences in the gene expression between pre- and post-CPB. These genes may be in- valved in inflammation and other psthophysiological responses incuced by CPB. The myocardiym is probably one of the major sources of cytokines during CPB. Further study may be helpful in understanding the llngthe development of inflammation during CPB, and eventually, reducing the post-operative complications.     

肾综合征出血热患者T细胞亚群数量与白细胞介素2,4水平变化的关系

采用ABC免疫组化染色法及单克隆抗体夹心法ELISA，同步检测了34例肾综合征出血热（HFRS）患者外周血T细胞亚群数量和血清白细胞介素2和4（IL－2、IL－4）水平。发现HFRS病程中各T细胞亚群数量均有不同程度的升高，其中CDS阳性T细胞在各病期均有升高。IL－4水平升高仅见于发热期．而IL－2的升高主要在低血压期和少尿期。病程中有CD4／CD8比值的下降甚至倒置。这种比值的变化与IL－2和IL－4的动态变化有一定的相关性。结果揭示，在HFRS发病机理中存在Thl型和Th2型免疫反应等多种免疫病理机制。     

MTT比色法及其应用

MTT比色法由于具有简便、快速、经济、不使用同位素等优点，现已在基础医学、临床医学和生物学研究等许多领域得到广泛应用。本文对该方法的原理、基本方法，应用及其方法的改进作一综述。     

软骨损伤的基因治疗研究进展

由于软骨组织内无血管,因此其损伤后仅靠其自身来修复是非常有限的.有研究表明,很多细胞因子具有促进软骨形成及软骨样组织修复的功能.由细胞介导的相关基因于损伤部位分泌这些细胞因子促进软骨修复被认为足最理想的治疗方法.基因治疗正是在这一基础上发展起来的一种治疗技术,近年来取得了快速的发展.就近期软骨损伤的基因治疗进展进行综述.     

系统性红斑狼疮患者骨髓基质细胞生长特性与相关细胞因子的表达

背景：骨髓造血依赖于干细胞所处的造血微环境，其中基质细胞及多种细胞因子在造血中发挥着重要的调控作用。系统性红斑狼疮具有淋巴细胞亚群及相关细胞因子表达，其基质细胞及细胞因子的异常可能导致造血微环境异常，损伤造血功能。 目的：观察体外培养系统性红斑狼疮基质细胞的生长特性及细胞因子白细胞介素6、白细胞介素8的表达，探讨细胞因子与系统性红斑狼疮活动的关系，阐明系统性红斑狼疮慢性病贫血可能的病理机制。 设计、时间及地点：细胞学体外培养，病例-对照观察，于2008-01/12在大连医科大学附属第二医院血液风湿科及血液学实验室完成。 对象：选择大连医科大学附属第二医院血液风湿科收治的活动期系统性红斑狼疮患者15例(实验组)，男1例，女14例，中位年龄32(20~55)岁；合并慢性病贫血者7例，无贫血者8例。另选健康个体10名作为对照，男9名，女1名，中位年龄46(38~57)岁。 方法：取系统性红斑狼疮患者及健康对照者的骨髓液分离单个核细胞培养。 主要观察指标：系统性红斑狼疮患者及健康对照者骨髓基质细胞生长特性及体外培养上清白细胞介素6和白细胞介素8的水平。 结果：系统性红斑狼疮患者骨髓基质细胞较健康对照生长及集落形成均延后，合并慢性病贫血的系统性红斑狼疮患者更加明显，集落内各细胞排列欠规整有序。与健康对照者相比，系统性红斑狼疮患者骨髓基质细胞体外培养上清细胞因子白细胞介素6、白细胞介素8的表达显著升高(P < 0.01)，并且与系统性红斑狼疮的疾病活动呈正相关。 结论：由于系统性红斑狼疮基质细胞可能存在功能的缺陷，并且高表达细胞因子如白细胞介素6、白细胞介素8，损伤了骨髓微环境，最终导致系统性红斑狼疮患者造血功能异常。细胞因子可能成为系统性红斑狼疮疾病活动的标志。