结直肠癌患者细胞粘附分子水平的变化

目的探讨结、直肠癌患者血清可溶性细胞间粘附分子和可溶性E-选择素水平的变化。方法应用酶联免疫吸附法测定42例结、直肠癌患者和20例健康对照者血清可溶性细胞间粘附分子和可溶性E-选择素水平。结果①与对照组比较,病例组血清可溶性细胞间粘附分子和可溶性E-选择素的水平显著增高(P<0.01);②随Duke分期进展,患者血清可溶性细胞间粘附分子和可溶性E-选择素的水平逐渐增高,DukeD、C期分别与DukeB、A期比较有显著性差异(P<0.01和P<0.05);③病例组高、中分化组血清可溶性细胞间粘附分子和可溶性E-选择素的水平与低分化组比较无显著性差异(P>0.05)。结论血清可溶性细胞间粘附分子和可溶性E-选择素参与了结、直肠癌的侵袭转移过程,是反映结、直肠癌发生、发展和预后的重要指标。     

黄芪多糖对人心脏微血管内皮细胞再灌注损伤P、E选择素基因转录的影响

目的 观察黄芪多糖对人心脏微血管内皮细胞(HCMEC)缺血再灌注损伤P、E选择素mRNA转录的影响,探讨其对缺血再灌注损伤心肌的保护机制.方法 将由原代培养至第5代的HCEMC随机分为正常组,模型组,黄芪多糖低(25 mg/L)、高(100 mg/L)剂量组,吡咯烷二硫代氨基甲酸(PDTC,50 μmol/L)组.以体...     

Induction of adhesion molecule expression on blood vessels and keratinocytes in recurrent oral ulceration

Adhesion molecules are known to play a crucial role in the recruitment of inflammatory cells to sites of inflammation. In this study endothelial cell and keratinocyte adhesion molecule expression in recurrent oral ulcers (ROU) ( n =13) was compared with that found in normal oral mucosa (NOM) ( n =11) and experimentally induced ulcers (EIU) ( n =5) by using immunohistochemistry. Significantly greater expression of both vascular cell adhesion molecule-1 (VCAM-1) and E-selectin was demonstrated on vasculature in ROU compared with that found in both NOM and EIU. Induction of keratinocyte intercellular adhesion molecule-1 (ICAM-1) was also a prominent feature of ROU. The expression of VCAM-1 and E-selectin on blood vessels in ROU is likely to be important in the accumulation of lymphocytes that characterise early aphthous lesions. The induction of keratinocyte ICAM-1 may facilitate lymphocyte invasion of the epithelium in ROU, which may ultimately result in ulcer formation.     

Effects of transdermal hormone replacement therapy on levels of soluble P- and E-selectin in postmenopausal healthy women

OBJECTIVE: To study the adhesion molecule pattern in postmenopausal women who were not receiving hormone replacement therapy (HRT), HRT users, and fertile women. DESIGN: Case-control study. SETTING: Second University of Naples, Naples, Italy. PATIENT(S): Fifty healthy naturally postmenopausal women and 20 fertile women. INTERVENTION(S): Twenty-six women received no HRT and 24 received continuous transdermal 17 beta-estradiol, 0.05 mg/d, plus oral acetate nomegestrol, 5 mg/d. MAIN OUTCOME MEASURE(S): Levels of the soluble forms of intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), E-selectin, and P-selectin. RESULT(S): Women who did not received HRT showed a trend toward higher levels of soluble E-selectin and had significantly higher levels of soluble P-selectin than did fertile women. Levels of soluble E-selectin and soluble P-selectin were significantly lower in HRT users than in nonusers. Levels of VCAM-1 levels were significantly higher in HRT users than in fertile women, but no significant differences in CAM concentrations were found between the other groups. CONCLUSION(S): Menopause may lead to increased levels of soluble E- and soluble P-selectin, whereas long-term HRT is associated with lower selectin concentrations. This suggests that HRT may have a beneficial effect on endothelial function.     

Levels of soluble E-selectin in patients with active Behçet’s disease

Behçets disease is a systemic vasculitis of unknown aetiology. Endothelial cell injury plays an important role in the pathogenesis and immunopathology of Behçets disease. E-selectin is expressed by activated endothelial cells. Because the selectin adhesion molecules are shed from activated cells, soluble forms of these proteins can be used as activation markers of endothelium (E-selectin). The pathogenesis of Behçets disease (BD) is closely related to endothelial cells, leucocyte functions and immunity. The aim of this study was to investigate circulating E-selectin adhesion molecules, which are known to play a significant part in the immune response especially by regulating interaction of the leucocytes with endothelium in BD. Plasma E-selectin concentrations were evaluated in 23 patients with BD and 20 healthy control subjects. The disease activity was evaluated by clinical manifestations (oral aphthous ulcer, genital ulceration, positive pathergy test, skin lesions, eye involvement, thrombophlebitis and arthritis) and by laboratory investigations [erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP)]. The patients were newly or previously diagnosed cases not taking any drug for BD. Levels of E-selectin were measured with commercially available sandwich enzyme-linked immunosorbent assay (ELISA) kits using human sE-selectin (cat. no: BMS 205). Plasma E-selectin concentrations of patients and controls were compared with the Mann-Whitney U test. Statistical significance was assigned to p values lower than 0.05. Serum levels (mean±SD) of soluble E-selectin (sE-selectin) were significantly higher in 23 patients with BD than in 20 healthy controls (53.2±18.2 ng/ml vs 33.8±7.5 ng/ml, p<0.0001). A statistically significant positive correlation was observed between sE-selectin levels and CRP and ESR in patients with BD (r=0.78, p<0.001 and r=0.56, p<0.01, respectively). Increases in the E-selectin in BD may be a direct consequence of the leucocyte and endothelium activations observed during the disease process. The noninvasive investigations can be used as biochemical markers for inflammation. This may provide additional information regarding disease activity along with the traditional indices such as ESR and CRP.     

促炎与抗炎细胞因子在肾综合征出血热发病中的作用

目的了解肾综合征出血热患者促炎与抗炎细胞因子的变化在其发病中的作用。方法将35例患者分为轻症组19例,重症组16例,按病期采血,分别用ELISA和放射免疫法检测细胞内黏附分子(ICAM)-1、E-选择素、L-选择素、转化生长因子(TGF)β-1、IFN-γ、TNF-α、IL-1β、IL-2、IL-4、IL-10等细胞因子,并同期检测PLT和肾功能。结果从发热期至多尿期,血清TNF-α、IL-1β、IFN-γ、IL-2、E-选择素、L-选择素和ICAM-1水平均高于对照组(P＜0．05或P＜0．01),而IL-4、TGF-β1则显著降低,血清IL-10增幅比IFN-γ低,以致IFN-γ/IL-10比值显著增高;TNF-α、IFN-β与BUN呈一致性变化趋势,而与PLT变化趋势相反。结论肾综合征出血热发病过程中存在促炎与抗炎细胞因子的失衡,这种失控性炎症反应是引起毛细血管渗漏和多器官功能障碍综合征的主要机制。合理补液、适量使用免疫调节剂,尽快恢复促炎与抗炎的平衡,可望改善本病的预后。     

黏附分子细胞间黏附分子-1/E-选择素与冠心病

冠心病是一种高发病率和高病死率的疾病,炎症反应在冠状动脉粥样硬化斑块的形成中起着重要作用。活化的血管内皮细胞分泌的细胞黏附分子,如细胞间黏附分子-1和E-选择素等,它们介导内皮细胞与白细胞、血小板间的起始黏附,促进血液循环中白细胞、血小板黏附于血管内皮,引起炎症反应、血栓形成等,在动脉粥样硬化和冠心病的发生、发展中起重要作用。     

血清E-选择素和血清C-反应蛋白在急性冠状动脉综合征患者中的变化及意义

目的:观察血清E选择素、血清C反应蛋白(CRP)水平在急性冠状动脉综合征(ACS)患者中的变化,并探讨其与斑块稳定性的关系。方法:30例ACS患者(ACS组)、24例稳定型心绞痛(SAP)患者(SAP组)及30例冠状动脉造影阴性者(对照组)作为入选对象,均以酶联免疫吸附法(ELISA)检测其E选择素,免疫速率散射测浊法测定其CRP水平。结果:ACS组血清E选择素、CRP水平显著高于SAP组(P<0.01)和对照组(P<0.01)。结论:血清E选择素、CRP可能与ACS发病有关,并反映斑块的不稳定性。     

E-选择素与糖尿病视网膜病变相关性的研究

糖尿病患者伴视网膜病变组 (DR)血浆中可溶性E 选择素水平高于不伴DR组 ,且与DR严重程度相关 ,提示E 选择素在DR的发生发展中起一定的作用。