Effects of TCMP-1 on the changes of platelet endothelial cell adhesion molecule-1 expression in acute edematous pancreatitis

BACKGROUND: Traditional Chinese medicine is a potent agent in the management of clinical and experimental acute pancreatitis (AP), but the molecular mechanism of its the- rapeutic action is unclear. Numerous experimental and clinical studies have shown that platelet endothelial cell ad- hesion molecule-1 (PECAM-1) is pivotal to leukocyte re- cruitment, which results in microcirculatory injury during inflammation, but its role in acute pancreatitis is poorly un- derstood. We investigated the effects of a compound of tra- ditional Chinese medicine pancreatitis-1 (TCMP-1) on the changes of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in acute edematous pancreatitis (AEP). METHODS: The model of acute pancreatitis was estab- lished by subcutaneous injection of caerulein, and TCMP-1 treated groups were given TCMP-1 by catheterization from mouth to stomach (20 ml/kg) immediately after first time subcutaneous injection of caerulein. The changes of expres- sion of PECAM-1 on leukocytes from the blood of the splenic vein and inferior vena cava were determined by flow cytometry. RESULTS: In the AEP group, expression of PECAM-1 on PMNs was not significantly different between pancreatic microcirculation and systemic circulation at AEP2h and AEP4h time point. Then from AEP4h time point to AEP8h time point, expression of PECAM-1 was up-regulated in systemic circulation while it was down-regulated in pancre- atic microcirculation and was significantly different be- tween pancreatic microcirculation and systemic circulation at AEP8h time point (P<0.05). In the TCMP-1 treated group, compared with the AEP group, expression of PE-CAM-1 on PMNs decreased in different levels between pan- creatic microcirculation and systemic circulation and was of significant difference at AEP8h time point (P <0.05). CONCLUSION: Inhibition of PECAM-1 expression on PMNs may prevent PMNs from transmigration through the endo- thelium and may be one of the treatment mechanisms of TCMP-1 decoction on AEP.

The relationship between platelet endothelial cell adhesion molecule-1 and paraquat-induced lung injury in rabbits

BACKGROUND:Platelet endothelial cell adhesion molecule-1(PECAM-1),also known as CD31,is mainly distributed in vascular endothelial cells.Studies have shown that PECAM-1 is a very significant indicator of angiogenesis,and has been used as an indicator for vascular endothelial cells.The present study aimed to explore the relationship between the expression of PECAM-1 and the degree of acute lung injury(ALI) and fibrosis in paraquat(PQ) induced lung injury in rabbits.METHODS:Thirty-six adult New Zealand rabbits were randomly divided into three groups(12rabbits in each group) according to PQ dosage:8 mg/kg(group A),16 mg/kg(group B),and 32 mg/kg(group C).After PQ infusion,the rabbits were monitored for 7 days and then euthanized.The lungs were removed for histological evaluation.Masson staining was used to determine the degree of lung fibrosis(LF),and semi-quantitative immune-histochemistry analysis to determine the expression of PECAM-1.Pearson's product-moment correlation analysis was performed to evaluate the relationship between the expression of PECAM-1 and the extent of lung injuries expressed by ALI score and degree of LF.RESULTS:Rabbits in the three groups showed apparent poisoning.The rabbits survived longer in group A than in groups B and C(6.47±0.99 days vs.6.09±1.04 days vs.4.77±2.04 days)(P<0.05).ALI score was lower in group A than in groups B and C(8.33±1.03 vs.9.83±1.17 vs.11.50±1.38)(P<0.05),and there was statistically significant difference between group B and group C(P=0.03).LF was slighter in group A than in groups B and C(31.09%±2.05%vs.34.37%±1.62%vs.36.54%±0.44%)(P<0.05),and there was statistically significant difference between group B and group C(P=0.026).The PEACAM-1 expression was higher in group A than in groups B and C(20.31%±0.70%vs.19.34%±0.68%vs.18.37%±0.46%)(P<0.05),and there was statistically significant difference between group B and group C(P=0.017).Pearson's correlation analysis showed that the expression of PECAM-1 was negatively correlated to both ALI score(Coe=-0.732,P=0.001)and degree of LF(Coe=-0.779,P<0.001).CONCLUSIONS:The PECAM-1 expression significantly decreases in New Zealand rabbits after PQ poisoning,and the decrease is dose-dependent.The PECAM-1 expression is negatively correlated with ALI score and LF,showing a significant role in the development of lung injuries induced by PQ.

Pingyangmycin-regulated Expressions of Adhesion Molecules in Human Venous Malformation Endothelial Cells

Pingyangmycin (bleomycin A5 hydrochloride,PYM) is one of the anti-neoplastic agents which have been commonly used to treat venous malformations.However,the underlying mechanism by which PYM treats venous malformations remains poorly understood.It was reported that venous endothelial cells could recruit neutrophils via adhesion molecules (E-selectin,ICAM-1,ICAM-3,VCAM-1) during the acute/chronic inflammation and subsequent histological fibrosis after sclerotherapy with PYM.This study explored if the expression of E-selectin,ICAM-1,ICAM-3 and VCAM-1 in human venous malformation endothelial cells could be affected by PYM.HVMECs were cultured from human venous malformation tissue.Expressions of E-selectin,ICAM-1,ICAM-3 and VCAM-1 on HVMECs in response to PYM were analyzed by cell ELISA.The relative levels of mRNA expression in the cells were semi-quantified.The results showed that PYM up-regulated the expressions of E-selectin,ICAM-3,VCAM-1 and ICAM-1 in both time-and concentration-dependent manner.Our findings suggested that PYM could induce the expression of adhesion molecules in HVMECs,which might be a possible mechanism by which sclerotherapy by intralesional injection of PYM treats venous malformations.

Ubiquitin Reduces Expression of Intercellular Adhesion Molecules and Tumor Necrosis Factor-α in Lung Tissue of Experimental Acute Lung Injury

Background Intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) are two important cytokines in inflammatory response, which may induce rolling and adhesion of both leukocytes and lymphocytes, while modulating vascular permeability at the same time. These adhesion molecules usually serve as surrogate markers of activation and injury of vascular endothelial cells. Tumor necrosis factor-α (TNF-α) is a key factor to induce the expression and production of the above cell adhesion molecules. However, it remains to be elucidated whether exogenous ubiquitin exerts any effect on the cytokines in sepsis-induced ALI. Methods Sixty mice were devided randomly into five groups with twelve mice in each group, i.e. CLP group, SHAM group, UB1 group (10 mg/kg), UB2 group (5 mg/kg) and UB3 group(1 mg/kg). Mice of SHAM group underwent sham operation, and other four groups underwent CLP. Six hours after surgery, mice of three UB groups received ubiquitin by caudal vein injection while CLP and SHAM group received vehicle. Seven hours after surgery, blood and lungs of all mice were collected. ICAM-1, VCAM-1 and TNF-α level of 9% lung homogenate and serum TNF-α level were measured by ELISA. Results Pulmonary ICAM-1, VCAM-1 and TNF-α level of three UB groups were lower than CLP and SHAM group, and there were several comparisons with a statistically significant difference. Serum TNF-α level of three UB groups were slightly lower than CLP group, but far higher than SHAM group. Pulmonary ICAM-1 level, VCAM-1 level and serum TNF-α level of UB3 group were lower than UB1 and UB2 group, and there was a significant difference in VCAM-1 between UB3 and UB1 group. Pulmonary TNF-α level of UB3 group was slightly higher than UB1 and UB2 group.

Expressions of ICAM-1 and its mRNA in sera and tissues of patients with hepatocellular carcinoma

INTRODUCTIONThe increased expression of ICAM-1 on a widerange of cells and in the sera of patients withmalignancies, chronic liver diseases andinflammation diseases has been described since thelate 1980s[1-22]. Recently rapid progress in studieson expression of ICAM-1 in patients withhepatocellular carcinoma ( HCC ) have beenachieved, including clinical and experimentalresearches[23-31].

肝衰竭患者外周血单个核细胞hTERT mRNA及血清Ang-2和ICAM-1水平临床意义探讨

目的初步探讨肝衰竭患者外周血单个核细胞人瑞粒酶逆转录酶(hTERT)mRNA及血清血管生成素-2(Ang-2)和细胞间黏附分子-1(ICAM-1)水平变化的临床意义。方法2019年1月~2021年5月我院诊治的74例肝衰竭患者【亚急性肝衰竭(SALF)13例,慢加急性肝衰竭(ACLF)39例和慢性肝衰竭(CLF)22例】和同期健康体检者30例,分离并检测外周血单个核细胞(PBMC)hTERT mRNA水平,采用ELISA法检测血清Ang-2和ICAM-1水平。结果肝衰竭组PBMC hTERT mRNA、血清Ang-2和ICAM-1水平分别为(0.9±0.3)、(1344.6±55.3)ng/L和(540.2±22.4)ng/ml,显著高于健康人组【分别为(0.4±0.1)、(1062.5±36.2)ng/L和(167.3±15.6)ng/ml,P<0.05】;SALF患者PBMC hTERT mRNA、血清Ang-2和ICAM-1水平分别为(1.5±0.6)、(1507.8±38.2)ng/L和(647.3±26.2)ng/ml,显著高于ACLF患者【分别为(1.2±0.4)、(1398.6±35.8)ng/L和(582.7±24.1)ng/ml,P<0.05】或CLF患者【分别为(0.7±0.2)、(1280.5±46.3)ng/L和(468.9±20.3)ng/m,P<0.05】;经过1~3 m治疗,SALF组死亡3例,ACLF组死亡5例,CLF组死亡4例。结论肝衰竭患者PBMCs hTERT mRNA及血清Ang-2和ICAM-1水平显著升高,它们可能为判断肝损伤程度提供客观依据,值得进一步研究。

外周血FOXO3a、VCAM-1水平评估2型糖尿病患者心血管病风险的价值

目的探讨外周血叉头盒O类转录因子-3a(Foxo3a)、血管细胞黏附分子-1(VCAM-1)评估2型糖尿病患者心血管病风险的价值。方法前瞻性选择2020年3月至2022年3月青岛市城阳区人民医院收治的2型糖尿病患者120例作为研究组,将同期体检的正常者50名作为对照组。采集所有入组者外周血,检测并对比两组FOXO3a、VCAM-1水平。将120例2型糖尿病患者按有无发生心血管疾病分为CVD组(n=45)及非CVD组(n=75),统计CVD组和非CVD组的一般资料、VCAM-1、FOXO3a水平等差异。采用单因素、多因素分析两组影响2型糖尿病患者发生心血管疾病的危险因素。采用受试者工作特征(ROC)评估外周血FOXO3a、VCAM-1水平预测2型糖尿病患者发生心血管疾病的价值。结果研究组患者VCAM-1水平(3.25±0.69)ng/mL,高于对照组[(1.76±0.59)ng/mL],FOXO3a水平为0.42±0.06,低于对照组(0.91±0.24),差异均有统计学意义(P<0.05)。CVD组体重指数≥24 kg/m2占比、有心血管疾病家族史占比、收缩压≥140 mmHg占比、VCAM-1、甘油三酯、总胆固醇水平为66.67%、57.78%、62.22%、(4.02±1.02)ng/mL、(2.67±0.52)mmol/L、(5.36±1.02)mmol/L,均高于非CVD组[33.33%、37.33%、41.33%、(3.06±0.98)ng/mL、(2.01±0.50)mmol/L、(4.12±1.01)mmol/L],FOXO3a水平0.33±0.09,低于非CVD组(0.54±0.12),差异均有统计学意义(P<0.05)。多因素Logisitic回归分析发现,体重指数≥24 kg/m2、有心血管疾病家族史、收缩压≥140 mmHg、VCAM-1≥3.817 ng/mL、FOXO3a≤0.440、甘油三酯≥2.338 mmol/L、总胆固醇≥4.483 mmol/L均是导致2型糖尿病患者发生心血管病的危险因素(P<0.05)。经过ROC曲线分析证实,VCAM-1、FOXO3a、甘油三酯、总胆固醇可用于2型糖尿病患者发生心血管病的预测,曲线下面积分别为0.735、0.936、0.893、0.833。结论2型糖尿病患者外周血VCAM-1、FOXO3a水平存在异常表达,可用于2型糖尿病患者发生心血管病的预测。

磁振磁电疗法治疗湿热瘀阻型慢性前列腺炎/慢性盆底疼痛综合征的效果及对单核细胞趋化蛋白-1、血管细胞黏附因子-1的影响

目的观察磁振磁电疗法治疗湿热瘀阻型慢性前列腺炎/慢性盆底疼痛综合征(CP/CPPS)的效果及对单核细胞趋化蛋白-1(MCP-1)、血管细胞黏附因子-1(VCAM-1)水平的影响。方法选取广东省中医院珠海医院2021年1月至2022年1月的110例湿热瘀阻型CP/CPPS患者。按照随机数字表法将其分成对照组和试验组,每组55例。对照组予前列倍喜胶囊,试验组予磁振磁电疗法,治疗2个疗程。比较两组美国国立卫生研究院慢性前列腺炎症状积分指数(NIH-CPSI)评分,临床疗效,中医证候评分,中医证候疗效,前列腺液VCAM-1、MCP-1水平及不良反应发生情况。结果治疗后,两组NIH-CPSI评分及中医证候评分均低于治疗前,且试验组低于对照组(P<0.05)。试验组临床疗效优于对照组(P<0.05)。试验组的中医证候疗效优于对照组(P<0.05)。治疗后,两组前列腺液MCP-1、VCAM-1水平均低于治疗前,且试验组低于对照组(P<0.05)。两组均未见局部疼痛、皮肤潮红、水泡、全身不适等不良反应。结论磁振磁电疗法治疗湿热瘀阻型CP/CPPS效果显著,其作用机制可能与调节MCP-1、VCAM-1水平,激发免疫功能,抑制炎症有关。

血清sICAM-1和TGF-β1水平、RBC-ICR率及淋巴细胞比例与剖宫产术后发生产褥感染的关系

目的 分析血清可溶性细胞间黏附分子1(sICAM-1)和转化生长因子β1(TGF-β1)水平、红细胞免疫复合物花环(RBC-ICR)率、淋巴细胞比例与剖宫产术后发生产褥感染的关系。方法 选取108例剖宫产术后发生产褥感染的产妇作为研究组,依据感染程度将其分为轻度组(41例)、中度组(35例)与重度组(32例)。另选取剖宫产术后未发生产褥感染的60例产妇作为对照组。比较研究组与对照组之间,以及轻度组、中度组与重度组之间产前血清sICAM-1和TGF-β1水平、 RBC-ICR率、淋巴细胞比例。采用多因素Logistic回归模型分析影响剖宫产术后发生产褥感染的因素。结果 研究组的产前血清sICAM-1和TGF-β1水平、 RBC-ICR率、淋巴细胞比例高于对照组(P<0.05)。轻度组、中度组、重度组的产前血清sICAM-1和TGF-β1水平、 RBC-ICR率及淋巴细胞比例依次升高(P<0.05)。多因素Logistic回归分析结果显示,校正混杂因素后,产前血清TGF-β1水平、RBC-ICR率、淋巴细胞比例是剖宫产术后发生产褥感染的独立影响因素(P<0.05)。结论 剖宫产术后发生产褥感染的产妇产前血清sICAM-1和TGF-β1水平、 RBC-ICR率、淋巴细胞比例升高,且四项指标均随着感染程度的加重而升高。产前血清TGF-β1水平、RBC-ICR率、淋巴细胞比例升高的产妇,其剖宫产术后发生产褥感染的风险增加。

Negative Association of Circulating MicroRNA-126 with High-sensitive C-reactive Protein and Vascular Cell Adhesion Molecule-1 in Patients with Coronary Artery Disease Following Percutaneous Coronary Intervention

Background： Percutaneous coronary intervention （PCI） causes endothelial damage, resulting in an inflammatory response with elevation of markers such as high-sensitive C-reactive protein （hs-CRP） and vascular cell adhesion molecule-1（VCAM-1）, which are associated with restenosis after PCI. Evidence suggests that microRNA-126 （miR-126） plays an important role in vascular inflammation, but its correlation with PCl-mediated inflammation has not been investigated. In this study, we investigated the effect of PCI on circulating miR-126 and inflammation markers such as hs-CRP and VCAM-1. Methods： We enrolled 130 patients with coronary artery disease （CAD） in the Second Hospital of Jilin University from October 2015 to December 2015. Among them, 82 patients with CAD, defined as at least one major epicardial vessel with 〉70% stenosis who planned to undergo PCI, were divided into acute coronary syndrome （ACS） group （46 patients） and stable angina （SA） group （36 patients）. Forty-eight patients confirmed by coronary angiography without PCI were used as controls. The plasmas of all patients were collected prior to PCI and at 30 min, 24 h, and 72 h after PCI. The plasma VCAM-1 and hs-CRP were detected by enzyme-linked immunosorbent assay, and the miR-126 was evaluated by quantitative reverse transcription-polymerase chain reaction. Results： Plasma concentrations of hs-CRP and VCAM-I in patients with either ACS （n = 46） or SA （n = 36） were significantly higher than in controls （n = 48） （P 〈 0.01） prior to PCI, and increased further at 24 h and 72 h after PCI, compared with prior PCI. Moreover, VCAM-1 was positively correlated with balloon time and pressure. In contrast, the plasma concentration of miR-126 was significantly lower in patients with CAD than in controls, and further decreased with time post-PCl. A negative correlation was observed between miR-126 and hs-CRP and VCAM-1 at 72 h after PCI. Conclusion： There was a negative correlation of miR-126 with the PCI-induced markers of inflammation such as hs-CRP and VCAM-1.

Expression of platelet-endothelial cell adhesion molecule-1 in human umbilical vein endothelial cells by exposure to advanced glycosylation end products and inflammatory mediators

Objective To determine whether advanced glycosylation end products modified bovine serum albumin (AGEs-BSA) affects endothelial cell lateral junction protein, platelet-endothelial cell adhesion molecule-1 (PECAM-1) in the presence or absence of inflammatory mediators.Methods Cultured human umbilical vein endothelial cells (HUVECs) were exposed to AGEs-BSA for 6, 12, 24, and 36 hours, and exposed to AGEs-BSA glycosylated with different concentrations of glucose, tumor necrosis factord-α (TNF-α), interferon (IFN-γ), TNF-α + IFN-y and AGEs-BSA + TNF-α for 24 hours, respectively. Expression of PECAM-1 mRNA was measured by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) with β-actin as an internal standard, and sequencing of RT-PCR products was performed to confirm the specificity of amplification for PECAM-1 gene. The endothelial cell surface expression of PECAM-1 was determined by flow cytometry (FCM).Results There were no significant changes in the expression of PECAM-1 mRNA and protein when the cells were exposed to AGEs-BSA with different concentrations or periods ( P>0. 05). However, PECAM-1 expression was reduced in the cells treated with TNF-α, IFN-y, TNF-α + IFN-γ and AGEs-BSA + TNF-α. The level of PECAM-1 treated with AGEs-BSA + TNF-α was lower than that of TNF-α treated alone (P<0. 01).Conclusions AGEs-BSA had no effect on the expression of PECAM-1 mRNA and protein in cultured HUVEC. With the presence of inflammatory mediator TNF-α, AGEs-BSA decreased the level of PECAM-1, which might reduce the adhesion interaction between adjacent endothelial cells, enhance the permeability of endothelial cells, and might be implicated in the endothelial dysfunction and pathogenesis of atherosclerosis in patients with diabetes mellitus. The significance of this phenomenon in intracellular signal transduction remains to be determined.

Cardiotrophin-1 induces intercellular adhesion molecule-1 expression by nuclear factor κB activation in human umbilical vein endothelial cells

Background In addition to elevated concentrations of cytokines, patients with congestive endothelial dysfunction and increased plasma concentrations of adhesion molecules heart failure （CHF） show ke intercellular adhesion molecule-1 （ICAM-1）. Furthermore, the concentration of cardiotrophin-1 （CT-1） - a cytokine of the interleukin-6 superfamily - is increased in CHF. We tested the hypothesis whether CT-1 is able to induce ICAM-1 in human umbilical vein endothelial cells （HUVEC）. Furthermore we examined the signalling mechanisms of CT-1 mediated ICAM-1 expression. Methods Confluent layers of HUVEC were incubated with increasing concentrations of CT-1 （5 to 100 ng/ml） for different periods. ICAM-1 mRNA was determined by real-time polymerase chain reaction （PCR） and ICAM-1 surface expression by fluorescence-activated cell sorter （FACS） analysis and soluble ICAM-1 （slCAM-1） in the culture supernatant by enzyme linked immunosorbent assay （ELISA）. To clarify the signalling pathway of CT-1 induced ICAM-1 expression we used various inhibitors of possible signal transducing molecules, electromobility shift assay （EMSA） and Western blot analysis. Results CT-1 induced ICAM-1 mRNA （1.8±0.8 fold increase compared to unstimulated cells after 6 hours） and protein （1.4±0.2 fold increase compared to unstimulated cells after 48 hours） in HUVEC in a time- and concentration-dependent manner. EMSA experiments show that CT-1 causes nuclear factor （NF） κB activation. Because parthenolide could inhibit CT-1 induced ICAM-1 expression NFκB activation is required in this pathway. CT-1 did not activate extracellular signal regulated kinases （ERK）, c-Jun N-terminal kinase （JNK） and p38. Conclusion CT-1 is able to induce ICAM-1 in endothelial cells by NFκB activation. These results may explain in part elevated ICAM-1 concentrations in patients with CHF and endothelial dysfunction.

缺血性脑卒中血清可溶性细胞间粘附分子-1的含量变化

目的 :观察脑梗死患者血清可溶性细胞间粘附分 - 1(s ICAM- 1)的含量变化 ,探讨其在脑梗死中的作用和意义。方法 :采用酶联免疫吸附法检测了 5 5例脑梗死患者急性期和恢复期血清 s ICAM- 1含量变化 ,并与 32例非脑梗死疾病患者和 30例正常健康者血清 s ICAM- 1含量比较。结果 :1脑梗死患者无论急性期还是恢复期其血清s ICAM- 1含量 [分别为 (766± 179) μg/ L和 (60 2± 15 5 ) μg/ L]均较两对照组 [分别为 (5 30± 77) μg/ L和 (5 2 1± 116)μg/ L]明显升高 (P<0 .0 1) ;2脑梗死急性期血清 s ICAM- 1含量与外周血中白细胞数量呈正相关 (r=0 .2 85 ,P<0 .0 5 ) ,与神经功能缺失评分呈负相关 (r=- 0 .333,P<0 .0 5 ) ;3脑皮质梗死组与基底节区梗死组间血清 s ICAM- 1含量差异无显著性 (P>0 .0 5 ) ,分别为 (773± 178) μg/ L和 (75 8± 183) μg/ L;4脑梗死伴有高血压组与不伴高血压组间血清 s ICAM- 1含量差异亦无显著性 (P>0 .0 5 ) ,分别为 (774± 189) μg/ L和 (75 4± 165 ) μg/ L。结论 :ICAM- 1通过炎症性白细胞变化机制参与了脑梗死的整个病理生理过程 ;急性期时测定血清 s ICAM- 1含量可以作为判断脑梗死发作的一个指标 ;脑梗死时血清 s ICAM- 1的浓度变化与病灶部位和有无高血压关系不?

血管细胞黏附分子-1在肺间质纤维化肺血管损害中的作用

目的:探讨血管细胞黏附分子-1(VCAM-1)在博莱霉素(BLM)致大鼠肺纤维化肺组织中的表达及其在肺血管损害中的作用.方法:采用免疫组化方法结合图像分析处理系统,研究VCAM-1在博莱霉素致肺纤维化大鼠肺组织中的免疫反应.结果:在正常对照组,VCAM-1大鼠肺组织中呈弱表达,分布于肺泡上皮细胞、细支气管上皮细胞、肺泡巨噬细胞及少量的肺内间质.在实验组,VCAM-1亦表达于上述细胞并呈高表达,两者差异有统计学意义(P(0.05).结论:在博莱霉素致大鼠肺损伤中VCAM-1是肺血管损害的重要细胞因子之一,它参与了肺组织炎症和纤维化过程.

VCAM-1修饰人脐血基质细胞对造血干/祖细胞扩增作用的实验研究

目的:初步研究VCAM-1修饰的hUCBSCs促进造血干/祖细胞体外扩增的作用。方法:在成功构建VCAM-1-pcDNA3.1(+)真核表达载体的基础上,转染原代培养的人脐血基质细胞,采用半定量RT-PCR法和免疫细胞化学技术检测转染前后hUCBSCs VCAM-1的表达情况;以VCAM-1修饰的人脐血基质细胞为滋养层,体外扩增脐血CD34+细胞,并对扩增后的脐血CD34+细胞进行CFU-GM、CFU-E、CFU-Mg半固体培养。结果:脂质体介导VCAM-1-pcDNA3.1(+)真核表达载体成功转染人脐血基质细胞;RT-PCR和免疫细胞化学从mRNA水平和蛋白质水平均证明转染后VCAM-1表达明显高于转染前(P<0.05);VCAM-1修饰的人脐血基质细胞能够有效支持脐血CD34+细胞的体外扩增(P<0.01),其中对CFU-Mg的扩增作用强于未转染组(S组,P<0.05)。结论:VCAM-1修饰的人脐血基质细胞能够有效地支持造血干/祖细胞的体外扩增,显示其在造血重建方面潜在的应用价值。

细胞粘附因子-1与恶性疟原虫感染红细胞结合位点的鉴定

目的 探索恶性疟原虫感染红细胞 (PRBCs)与细胞粘附因子 1 (ICAM 1 )之间的结合位点 ,研制治疗脑型疟的抗粘附药物。 方法 以抗ICAM 1 (I区 )的单抗 1 5 .2为靶 ,采用亲和筛选法对噬菌体随机十二肽库进行 3轮筛选 ,通过ELISA、竞争抑制试验、dot ELISA及Westernblotting鉴定获得的噬菌体短肽与单抗 1 5 .2之间的结合特性。对阳性克隆进行DNA序列测定 ,推导其十二肽的氨基酸序列并与ICAM 1氨基酸全序列进行同源性比较。 结果 经 3轮亲和筛选后 ,结合噬菌体得到良好富集。从第 3轮洗脱液铺制的琼脂板中随机挑取 30个噬菌体单克隆 ,ELISA检测有 2 6个为阳性 ,阳性率达 86 .7%。竞争性ELISA显示多数阳性噬菌体能竞争抑制ICAM 1与 1 5 .2单抗结合。DNA及氨基酸序列分析表明半数以上的噬菌体克隆表达十二肽KLYLIAEGSVAA ,该短肽中K(XX)L(XXX)GSV与ICAM 1的 64～ 73位aa有 50 %的同源性。 结论 阳性噬菌体表达的短肽是 1 5 .2单抗所识别的模拟表位 ,K··L···GSV几个氨基酸可能对ICAM

VCAM-1基因的克隆及VCAM-1-pcDNA3.1(+)真核表达载体的构建

目的克隆人血管细胞黏附分子(vascular cell adhesion molecule-1,VCAM-1)cDNA全长,并构建VCAM-1-pcD-NA3.1(+)真核表达载体。方法采用半巢式RT-PCR从人脐静脉内皮细胞系HUV-EC-C中分三段扩增得到VCAM-1cDNA片段,采用重叠延伸剪切技术(SOE)并经SacⅠ酶切、T4连接酶连接获得VCAM-1完整片段,克隆至pcDNA3.1(+)真核表达载体,得到VCAM-1-pcDNA3.1(+)真核表达载体。结果酶切及测序结果证明VCAM-1-pcDNA3.1(+)真核表达载体构建成功。结论成功扩增人VCAM-1基因,构建VCAM-1-pcDNA3.1(+)真核表达载体,为探索VCAM-1修饰人脐血基质细胞(human umbilical cord blood stromal cell,hUCBSC)重建造血微环境奠定了实验基础。

鼻息肉中细胞间黏附分子1和E-选择素的表达及意义

鼻息肉是耳鼻咽喉科常见病,严重危害人们身心健康。鼻息肉发病机制至今仍未完全阐明,众多研究表明嗜酸性粒细胞（eosinophils,Eos）浸润是鼻息肉最显著的病理特征。因此,探讨以Eos为代表的炎性细胞聚集和活化成为研究鼻息肉发病机制的热点。本文拟通过分析鼻息肉组织中细胞间黏附分子1（intercellular adhesion molecule-1,ICAM．1）、E-选择素的表达，探讨其与Eos浸润及鼻息肉形成的关系。

磁振磁电疗法联合丹红通精方治疗慢性前列腺炎/盆腔疼痛综合征及其对分泌型IgA、血管细胞黏附分子-1、白介素-8的影响

目的:观察磁振磁电疗法联合中药协定方丹红通精方干预下慢性前列腺炎/盆腔疼痛综合征(CP/CPPS)患者疾病的疗效与细胞因子分泌型IgA(sIgA)、血管细胞黏附分子-1(VCAM-1)、白介素-8(IL-8)水平的变化。方法:CP/CPPS(气滞血瘀证)患者随机分成3组,实验组70例,予磁振磁电疗法并联合丹红通精方口服;对照1组71例,予磁振磁电疗法治疗,对照2组69例,予丹红通精方口服;6周为1个疗程,共2个疗程。治疗后统计治疗的总有效率、NIH-CPSI评分、中医证候评分、前列腺液中sIgA、VCAM-1、IL-8水平。结果:实验组、对照1组、对照2组实际完成例数分别为68、67、65例,总有效率分别为86.76%、79.10%、78.46%,实验组与各对照组的总有效率比较,差异具有统计学意义(P<0.05或P<0.01)。3组患者治疗后的疼痛或不适评分为(4.61±2.37)、(5.86±3.26)、(6.94±2.25)分,排尿异常症状评分为(2.98±1.75)、(3.85±2.01)、(3.94±1.95)分,生活质量评分为(3.26±1.87)、(4.54±2.13)、(4.69±1.72)分,NIH-CPSI总评分为(10.64±5.91)、(4.59±6.87)、(15.54±5.76)分,治疗后实验组与对照1、2组比较,差异有统计学意义(P<0.05)。3组患者治疗后中医证候评分(5.56±3.42)、(7.37±4.57)、(8.16±3.65)分,实验组与对照1、2组比较,差异有统计学意义(P<0.05)。各组治疗前后比较,实验组sIgA(Z=-7.170)、VCAM-1(Z=-7.182)、IL8(Z=-7.18)显著降低;对照1组sIgA(Z=-7.032)、VCAM-1(Z=-7.130)、IL8(Z=-7.116)显著降低;对照2组sIgA(Z=-6.802)、VCAM-1(Z=-6.973)、IL8(Z=-6.768)显著降低;均具有统计学差异(P<0.05)。治疗后组间比较,实验组sIgA、VCAM-1、IL-8显著低于对照1组、对照2组(P<0.05)。结论:磁振磁电疗法联合丹红通精方对气滞血瘀证CP/CPPS的治疗效果良好,其作用机制可能通过调节sIgA、VCAM-1、IL-8等细胞因子,激活免疫系统功能,抑制炎症,促进局部炎性物质吸收有关。

肾综合征出血热患者血清sVCAM-1和IL-18含量变化及其相关性分析

目的:探讨血管细胞黏附分子-1(VCAM-1)及白细胞介素18(IL-18)在肾综合征出血热(HFRS)发病中的作用以及两者之间相关性,并观察其与肾损伤之间的关系。方法:采用双抗体夹心酶联免疫吸附(ELISA)法测定不同疾病分期52例HFRS患者血清sVCAM-1和IL-18含量变化,通过全自动生化分析仪测定其血尿素氮(BUN)和血肌酐(Cr)的水平变化,进行相关性分析,并以10例健康志愿者血清作为对照组进行对比。结果:HFRS发病早期、少尿期及多尿期及恢复期患者血清中sVCAM-1和IL-18均较正常对照组显著升高,于少尿期达高峰,多尿期下降,至恢复期患者血清中VCAM1和IL-18已接近正常水平。通过与肾损伤指标BUN和Cr的相关性分析,发现sVCAM-1和IL-18均与BUN和Cr显著相关;通过对患者血清中VCAM-1和IL-18的相关性分析,发现VCAM-1和IL-18也显著相关。结论:HFRS患者血清sVCAM-1和IL-18参与了HFRS的发病过程,可反映其病情程度,并与肾损伤程度呈正相关。