Correlation between endothelia cells activation and imbalance of cytokines in pulmonary hypertension of congenital heart disease

Objective To explore the correlation between endothelia cells activation and cytokines （ET-1, NO） levels in patients with pulmonary hypertension （PH）, and to discuss their roles in the development of PH. Methods Twenty patients with simple ventricular septal defect （VSD） were chosen as controls, and 30 patients with PH were studied. Plasma levels of ET-1 and NO were measured by radioimmunoassay or colorimetric method. Before cardiopulmonary bypass was established, the specimens from right lung were fixed with formaldehyde solution, embedded with paraffin and stained by SP immunohlstochemistry. Intercellular adhesion molecule-1 （ICAM-1） expression was measured through the determination of the light density with computer imaging technology. Results Compared with that of the patients with simple VSD, the light density of ICAM-1 and plasma level of ET-1 increased in patients with PH; but plasma level of NO decreased （P〈0.05）. Positive correlation was observed between ICAM-1 and ET-1/NO （P〈0.05）. Conclusion Endothelia cells activation and imbalance of ET-1/NO might play an important role in the development of PH.     

THE EFFECT OF FCγ RECEPTOR ON THE PATHOGENESIS OF GRAVES'' DISEASE

Objective To explore the roles of Fcγ receptor in the pathogenesis of Graves' disease. Methods Fcγ receptor gene knockout mice(Fcγ R KO mice) which were rooted in C57BL/6 mice and wild type C57BL/6 mice were immunized by hTSH receptor expressing cells (DAP3.WT).1-2×107 DAP3.WT cells were peritoneally injected into mice every two weeks for a total of six times.Two weeks after final immunization, mice were killed for measurement of total thyroxine,TRAb and pathological examination.Results The thyroxine level of the immunized Fcγ receptor gene knockout mice was significantly lower than that of the immunized wild type control mice (2.2±0.31 vs.3.32±0.59g·dL-1,P<0.05), but there was no significant difference between immunized Fcγ R KO mice and non-immunized wild type control group.The TRAb levels of the immunized Fγ R KO mice significantly increased compared to those of the immunized wild type mice (21.75±8.21 vs.14.11±6.21, P<0.05). The lymphocyte cells infiltration and destruction of thyroid follicles were found in the thyroid gland of the immunized Fcγ R KO mice. Conclusion　These results suggest that Fcγ receptor may be involved in the pathogenesis of Graves'disease.     

皮层下缺血性脑血管病CT表现与血管性痴呆的相关研究

目的　探讨皮层下缺血性脑血管病CT表现与血管性痴呆之间的关系。方法　对比分析 6 0例皮层下多发脑梗死痴呆者和 6 8例皮层下多发梗死无痴呆者CT表现。结果　痴呆组中额叶皮层下、内囊前肢、尾状核、半卵圆中心前部、侧脑室体旁前部白质及丘脑梗死发生率、平均梗死灶数目及平均梗死体积均大于对照组 (P <0 .0 5 ) ;3级、4级脑白质疏松出现率显著高于对照组 (P <0 .0 5 ) ;脑萎缩指数测量值明显大于对照组 (P <0 .0 5 )。非条件Logistic回归分析额叶皮层下及丘脑梗死灶数目、侧脑室体旁前部白质梗死灶体积、脑白质疏松以及脑皮层萎缩的程度与血管性痴呆的发生显著相关。结论　皮层下多发脑梗死性痴呆与梗死灶的部位、数目、体积和脑白质疏松及脑皮质萎缩的程度密切相关     

高等级公路边坡综合防护系统探讨

分析了路基边坡的病害类型、原因和边坡的侵蚀机理,提出了边坡的防护类型、特点及防护类型的选择原则。     

高频通气膈肌起搏治疗慢性阻塞性肺病

２０例ＣＯＰＤ患者用ＨＤＰ治疗１０ｄ，症状减轻，肺呼吸音增强。ＶＴ增加２５．１７％，ＶＥ增加３５．４９％，均显著高于对照组。ＰａＯ２增加１９．３２％，ＳａＯ２％亦显著增加，无ＣＯ２潴留，提示ＨＤＰ治疗可显著改善慢性阻塞性肺病患者的呼吸功能。     

阿尔茨海默病防治研究的现状与展望

阿尔茨海默病(AD)是一种严重的中枢神经系统退行性疾病。本研究室十多年来对该病的发病机制,特别是在防治方面进行了一些实验研究工作,并结合国内外最新的研究成果,提出了治疗AD新的理念和策略,为该病未来的临床治疗研究提供了新的思路。     

大骨节病患区和邻近非患区不同硒水平儿童尿中羟赖氨酸含量的初步探讨

1.大骨节病患区和邻近非患区不同硒水平儿童尿羟赖氨酸排出情况不同,凡是尿硒排出量低的儿童,其尿羟赖氨酸排出量也低,二者存在高度正相关关系。2.低硒儿童尿羟赖氨酸排出减少被认为可能与前α-肽链上赖氨酸羟化不全有关。3.本文着重对大骨节病儿童分组指标的选择做了详细讨论,指出合理分组是获得生化代谢变化正确信息的基础。     

阿尔茨海默病患者和非痴呆老人α2巨球蛋白抑制β淀粉样肽纤维形成能力的比较

目的　分析阿尔茨海默病患者和非痴呆老人及青年人的α2 巨球蛋白体外抑制β淀粉样肽纤维形成能力的差异,阐明α2巨球蛋白对β淀粉样肽降解代谢变化的影响。方法　使用浊度试验、硫磺素 T试验和电子显微镜负染方法,观察分析了β淀粉样肽的凝聚和纤维形成及26例阿尔茨海默病患者和 27 例非痴呆老人及 24 例青年人的α2 巨球蛋白对β淀粉样肽的凝聚和纤维形成的抑制作用。结果　12.5μmol/L浓度 Aβ1-42 肽在 pH7.4 的 PBS缓冲液中37℃恒温摇床温育72 h后电子显微镜负染可见大量的β淀粉样肽纤维形成。正常青年人的 50μmol/Lα2 巨球蛋白电镜下观察证实完全地抑制了β淀粉样肽纤维形成,浊度试验表明抑制率达(81.2±7.2)%,硫磺素 T试验抑制率达(78.7±7.7)%。非痴呆老年组等量α2巨球蛋白电镜下 2/27 例显示不全抑制,25/27 完全抑制,浊度和硫磺素 T试验抑制率分别为(73.0±8.7)%和(68.3±9.6)%,同青年组比较无显著性差异(P>0.05)。阿尔茨海默病患者等量α2巨球蛋白电镜下 15/26 例显示不全抑制,9/26 完全抑制,浊度和硫磺素 T试验抑制率分别为(50.0±6.87)%和(54.9±7.1)%,同青年组比较明显减低(P<0.01)。结论　阿尔茨海默病患者α2巨球蛋白体外抑制β淀粉样肽纤维形成能力明显减低,它将促进β淀粉样肽原纤     

自身免疫性甲状腺病TSH受体基因第一外显子突变的研究

目的　探讨自身免疫性甲状腺病发病与TSH受体基因第一外显子突变之间的关系。方法　用PCR SSCP方法对 1 46例Graves病 ,30例桥本甲状腺炎患者外周血白细胞DNATSH受体基因第一外显子突变进行筛查。结果　经PCR扩增后均出现明晰可辨的带型 ,SSCP分析1 76例无 1例出现异常泳动。结论　PCR SSCP分析未发现自身免疫性甲状腺病患者TSH受体基因第一外显子有突变 ,提示自身免疫性甲状腺病发病可能与TSH受体基因第一外显子突变无关     

沥青混凝土桥面铺装早期病害原因分析

对钢筋混凝土桥柔性铺装的早期病害及其原因进行了分析，指出了今后设计和施工控制的要点。