Clinical significance of serum intercellular adhesion molecule-1 detection in patients with hepatocellular carcinoma

INTRODUCTION Since the late 1980s,studies on the expression ofintercellular adhesion molecule-1(ICAM-1)inpatients with malignancies have demonstrated thatICAM-1 may strongly express in two forms in suchdiseases:membranous one on the surface of tumorcells(membrane-bound ICAM-1)and soluble one incirculation(soluble ICAM-1,sICAM-1).

The Value of the Soluable Intercellular Adhesion Molecule-1 Levels in Matermal Serum for Determination of Occult Chorioamnionitis in Premature Rupture of Membranes

To compare the diagnostic value of soluble intercellular adhesion molecule 1 (sICAM-1) with that of c-reactive protein (CRP) for detecting chorioamnionitis (CAM) in serum of women with premature rupture of membranes (PROM), 55 pregnant women with PROM, including 18 pregnant women with preterm premature rupture of membranes (PPROM) and 20 normal pregnant women at term (TPROM) were studied. Maternal serum were measured by Sandwish enzyme-linked immunoabsorbent assay (ELISA) for sICAM. CAM was histologically confirmed after delivery. The results revealed that (1) maternal serum levels of sICAM-1 and CRP were significantly higher in women with PROM than those without it; (2) maternal serum levels of sICAM-1 and CRP were significantly higher in women with CAM than those without it; (3) serum levels of sICAM-1 in PPROM women were similar to those in TPROM women, whereas serum levels of CRP in PPROM women were significantly higher than those in TPROM women; (4) the sensitivity, specificity, positive predictive value, negative predictive value, Kappa index and area under receiver operating characteristic (ROC) curve of maternal serum sICAM-1 (cutoff 104.7 ng/ml) and CRP(cutoff 1.03 mg/dl) for diagnosing CAM were 100 %, 91.2 %, 87.5 %, 100 %, 0.20, 0.995 and 81.0 %, 73.5 %, 65.4 %, 86.2 %, 0.13, 0.811, respectively; (5) among the mild histological CAM group, severe histological CAM group and clinical CAM group, the difference in maternal serum levels of sICAM-1 were significantly (P<0.001), with the order of concentration from high level to low level corresponding to the severity of CAM. It is concluded that maternal serum level of ICAM-1 is superior to that of CRP as biomarker for diagnosing intraamniotic infection in pregnant women with PROM.

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.

Mild hypothermia effects on intercellular adhesion molecule-1 and serum interleukin-6 expression in brain tissues of a rat focal ischemia model

BACKGROUND： Previous studies have confirmed the neuroprotective effect of mild hypothermia on ischemic brain injury. OBJECTIVE： To investigate the effects of mild hypothermia on intercellular adhesion molecule-1 expression and serum interleukin-6 levels in ischemic brain tissues of focal brain ischemia rats, and to explore the neuroprotective effects of mild hypothermia on ischemic brain injury. DESIGN, TIME AND SETTING： A randomized, controlled, neurobiological experiment was performed at the Central Laboratory, First Affiliated Hospital, Xinxiang Medical College, China from February to July 2006. MATERIALS： Thirty healthy, adult, Sprague Dawley rats were used to establish middle cerebral artery occlusion models using the suture method, The immunohistochemistry （streptavidin-biotin-peroxidase complex method） kit was purchased from Boster, China. Interleukin-6 radioimmunoassay was supplied by Institute of Radioimmunity, Technology Development Center, General Hospital of Chinese PLA. METHODS： The rats were equally and randomly assigned into mild hypothermia and control groups, and middle cerebral artery occlusion models were established. The rectal temperature was maintained at （37 ±0.5）℃ in the control group. In the mild hypothermia group, the rectal temperature was maintained at （33±1）℃. MAIN OUTCOME MEASURES： At 12 hours after model establishment, the ischemic brain hemispheres were coronally sliced at the level of the optic chiasm. The number of intercellular adhesion molecule-1-positive vessels per high-power field was observed with an optical microscope. Serum interleukin-6 levels were measured by radioimmunoassay. RESULTS： Compared with the control group, intercellular adhesion molecule-1 and serum interleukin-6 expressions were significantly decreased in ischemic brain tissues of the mild hypothermia group （P 〈 0.01）. CONCLUSION： Mild hypothermia exhibits a neuroprotective effect by reducing serum interleukin-6 and intercellular adhesion molecule-1 expression following cerebral ischemia.

Association of G+1688A Polymorphism of Platelet Endothelial Cell Adhesion Molecule-1 Gene with Myocardial Infarction in the Chinese Han Population

In order to investigate the association of G＋1688A （Ser563Asn） polymorphism of platelet endothelial cell adhesion molecule-1 （PECAM-1） gene with myocardial infarction （MI） in the Chinese Han population, the G＋1688A polymorphism in PECAM-1 gene was detected by polymerase chain reaction-restriction fragment-length polymorphism （PCR-RFLP） method among 502 subjects, including 218 patients with MI and 284 controls. The results showed that there was significant difference in AA frequencies of genotype G＋1688A polymorphism between case and control groups （39% vs 24%, P〈0.001）. A similar trend was observed on the allele frequencies （A/G： 62% vs 49%, P〈0.001）. Among the subjects with high serum total cholesterol level or high systolic blood pressure level, the variant AA genotype was associated with high risk of MI （adjusted OR, 2.13; 95% CI, 1.08 -4.41 and adjusted OR, 2.53; 95%CI, 1.63-3.63）. The single nucleotide polymorphism （SNP） at position ＋1688 in the exon 8 of PECAM-1 gene was associated with MI and the allele A might be a risk factor for MI in the Chinese Han population.

Expression of Intercellular Adhesion Molecule-1 in Immune Response of Inner Ear

To understand the role of intercellular adhesion molecule-1 (ICAM-1) in immune response of the inner ear, inner ear immune response was induced in rats by inoculation of keyhole limpet hemocyanine (KLH) into the scala tympani of the animals who had been systemically sensitized. The expression of ICAM-1 in the inner ear was immunohistochemically examined. ICAM-1 was found in the epithelium of the spiral modiolar vein (SMV) with its collecting venules (CVs) as early as 6 h after challenge. Expression of ICAM-1 was observed on the epithelium of the endolymphatic sac (ES) and perisaccular region at 12 h. The intensity of ICAM-1 staining reached its peak within 24 - 48 h in these sites of the inner ear. By day 28, most specimens were devoid of appreciable staining for ICAM-1. Our study demonstrates that adhesion molecules play an important role in extravasation of inflammatory cells from the systemic circulation in the process of inner ear immune response. It also shows that cytokines that control expression of adhesion molecules may be released by cells outside ES, besides those cells in the ES.

Changes of soluble intercellular adhesion molecule-1 in the serum from patients with acute cerebral infarction

objective: To observe the changes of soluble intercellular adhesion molecule-1(sICAM-1) in the serum of patients with acute cerebral infarctlon (ACI) and their clinical significance. Methods: The concen-tration of sICAM-1 in the serum of 91 patients with ACI was determined with ELISA and then the results were compared wlth those of 43 patients with cerebral hemorrhage and 30 healthy individuals. Results: In the 24th hour after infarction. the concentration of sICAMu-1 in the serum was significantly higher in patients with ACI than in patients with cerebral hemorrhage and normal controls (P< 0. 01). In the patients with ACI, the concentration exhibited an decreasing tendency in the period from the 24th hour to the 14th day andwas correlated with the focal size of cerebral infarction. During the first 14 days after infarction, the concen-tration was significantly higher in the patients with the complication of infection than in those without. Con-clusion: sICAM-1 is closely correlated with clinical manifestation of ACI.

Relationship of plasma homocysteine, soluble intercellular adhesion molecule-1, high mobility group box 1 protein with carotid intima-media thickness in elderly patients with type 2 diabetes mellitus

Objective:To explore the relationship of plasma homocysteine(Hcy),soluble intercellular adhesion molecule-1(sICAM-1)and high mobility group box 1 protein(HMGB1)with carotid intima-media thickness(c-IMT)in elderly patients with type 2 diabetes mellitus.Methods:A total of 100 elderly patients who were diagnosed as type 2 diabetes mellitus in Baogang Hospital of Inner Mongolia from June 2017 to May 2020 were chosen as research objects.According to c-IMT,they were divided into the normal group(n=35),the mild to moderate group(n=41)and the severe group(n=24).The expression levels of plasma Hcy,sICAM-1 and HMGB1 were compared between groups respectively.Pearson’s correlation coefficient was used to analyze the relationship of plasma Hcy,sICAM-1,HMGB1 with c-IMT.Results:The comparison in plasma Hcy,sICAM-1,HMGB1 and c-IMT among the three groups of patients was of statistical significance(p<.05).The results of correlation analysis showed that the expression levels of plasma Hcy,sICAM-1 and HMGB1 were positively correlated with c-IMT in elderly patients with type 2 diabetes mellitus(r=.627,.598,.614;p<.05).Conclusions:The expression levels of plasma Hcy,sICAM-1 and HMGB1 are abnormally increased in elderly patients with type 2 diabetes mellitus,and related to c-IMT,which can provide a strong evidence for clinical diagnosis and treatment by detecting their levels in clinical practice.

Intercellular Adhension Molecule-1 in the Pathogenesis of Heroin-induced Acute Lung Injury in Rats

The expression of intercellular adhesion molecule-1 (ICAM-1) in the pathogenesis of heroin-induced acute lung injury (ALI) in rats was investigated. The model of ALI was established by intravenous injection of heroin into tail vein in rats. Thirty-six rats were randomly divided into heroin-treated groups (1 h, 2 h, 4 h, 6 h and 24 h) and normal control group. Changes in histopathologic morphology and biological markers of ALI were measured. The expression of ICAM-1 in lung tissue was detected by using immunohistochemistry and RT-PCR. The results showed that the W/D ratio and protein contents in BALF of the heroin-treated groups were significantly higher than that of the control group (P<0.01). The histopathological changes in the lung tissue were more obvious in heroin-treated groups. The ICAM-1 protein and mRNA expression in the lung tissue of heroin-treated groups were significantly increased as compared with that of the control group (P<0.01), and correlated with the ALI parameters in a time-dependent manner. Increasing of ICAM-1 expression was involved in the formation of heroin-induced lung injury. Furthermore, the level of expression was positively correlated with the severity of lung injury.

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.

细胞间黏附分子-1、基质金属蛋白酶9及基质金属蛋白酶组织抑制物-1在非小细胞肺癌中的表达及与患者临床特征的关系

目的探讨细胞间黏附分子-1(ICAM-1)、基质金属蛋白酶9(MMP9)及基质金属蛋白酶组织抑制物-1(TIMP-1)在非小细胞肺癌(NSCLC)中的表达及与患者临床特征的关系。方法选取82例NSCLC患者,免疫组化法检测肿瘤组织及癌旁组织中ICAM-1、MMP9及TIMP-1的表达情况,并分析其与患者临床特征的关系,相关性分析采用Spearman等级相关分析。结果NSCLC患者肿瘤组织中ICAM-1、MMP9及TIMP-1阳性表达率均明显高于癌旁组织,差异均有统计学意义(P﹤0.01)。病理类型为腺癌、临床分期为Ⅲ~Ⅳ期、有淋巴结转移的NSCLC患者肿瘤组织中ICAM-1的阳性表达率均明显高于病理类型为鳞状细胞癌、临床分期为Ⅰ~Ⅱ期、无淋巴结转移的患者,差异均有统计学意义(P﹤0.01);临床分期为Ⅲ~Ⅳ期、有淋巴结转移的NSCLC患者肿瘤组织中MMP9、TIMP-1的阳性表达率均明显高于临床分期为Ⅰ~Ⅱ期、无淋巴结转移的患者,差异均有统计学意义(P﹤0.01)。Spearman相关分析显示,NSCLC患者肿瘤组织中ICAM-1的表达与MMP9的表达呈正相关(r=0.618,P﹤0.01),ICAM-1的表达与TIMP-1的表达呈正相关(r=0.584,P﹤0.01),MMP9的表达与TIMP-1的表达呈正相关(r=0.641,P﹤0.01)。结论ICAM-1、MMP9及TIMP-1在NSCLC患者肿瘤组织中阳性表达率高,且与NSCLC的发生发展密切相关。

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.

高浓度葡萄糖对培养的人视网膜色素上皮细胞细胞表面黏附分子-1的影响

目的:研究高浓度葡萄糖对体外培养人视网膜色素上皮(RPE)细胞细胞间黏附分子-1(ICAM-1)表达的影响。方法:用免疫荧光法检测5.6mmol/L和30.0mmol/L葡萄糖作用1,2,3d后hRPE细胞表面ICAM-1表达量,MTT方法检测两种浓度葡萄糖作用下48hhRPE表面黏附白细胞的数量。结果:30.0mmol/L葡萄糖作用1,2,3d后hRPE细胞表面荧光着色密度分别为5.6mmol/L葡萄糖作用下荧光着色的2.4,3.8,4.0倍。30.0mmol/L葡萄糖作用48h后hRPE细胞表面黏附的白细胞数量是5.6mmol/L葡萄糖组的2.34倍,有统计学显著性差异(P<0.05)。结论:高糖可以促进体外培养hRPE细胞的ICAM-1表达,提示RPE细胞在高糖作用下可能参与了糖尿病视网膜病变的早期病理反应。

胆红素对急性肺损伤大鼠肺血管内皮细胞核因子κB,细胞间粘附分子1表达的影响

目的 探讨胆红素对急性肺损伤 (ALI)的对抗作用及其对肺血管内皮细胞核因子 κB和细胞间粘附分子 1表达的影响。方法 用雄性Wistar大鼠 (2 0 0 - 2 5 0g) 30只 ,随机分为正常对照组、ALI动物模型组 (用内毒素制造模型 )、胆红素干预组。采用原位杂交技术半定量法和免疫组织化学染色测定肺血管内皮细胞中细胞间粘附分子 1(ICAM 1)mRNA和核因子κB (NF κB)蛋白的表达。结果 (1)ALI模型组肺血管内皮细胞ICAM 1mRNA表达和NF$CκB核染色阳性细胞百分比与正常对照组比较显著升高 ,(P <0 0 0 1) ;(2 )胆红素干预组ICAM 1mRNA表达和NF$CκB染色阳性细胞百分比与模型组相比明显减低 ,(P <0 0 0 1、P <0 0 1) ,但与正常对照组比较仍较高 (P <0 0 5 )。结论 ICAM 1和NF κB在ALI显著增加 ,胆红素可以抑制ALI动物NF κB和ICAM 1mRNA的表达 ,可能是其对抗急性肺损伤的作用机制之一。

急性白血病患者中ICAM-1和VCAM-1的表达及意义

目的探讨细胞间黏附分子1(ICAM-1)和血管细胞间黏附分子1(VCAM-1)在急性白血病(AL)中的表达及临床意义。方法39例初诊AL患者,其中27例经治疗后达完全缓解(CR)。采用逆转录-PCR法检测AL骨髓单个核细胞ICAM-1和VCAM-1的 mRNA表达水平。对照组12例均为骨髓像正常的门诊患者。结果ICAM-1和VCAM-1水平在初诊AL者明显高于CR组及对照组(P<0.01),且CR组和对照组之间无显著差异(P>0.05);高白细胞(WBC>100×109/L)组和死亡组的ICAM-1和VCAM-1水平明显增高(P<0.05)。髓外浸润组仅ICAM-1高于非髓外浸润组(P<0.01);非淋巴细胞AL(ANLL)具有良好核型者ICAM-1水平低于其他患者(P<0.05)。结论AL表达ICAM-1和VCAM-1明显增高,其检测对疗效及预后判断有重要意义。

新生儿缺氧缺血性脑病血清可溶性细胞间黏附分子-1水平动态变化

目的 研究新生儿缺氧缺血性脑病(HIE)极期和恢复初期血清可溶性细胞间黏附分子-1(sICAM-1)水平变化及其在HIE发病机制中的意义。方法 以17例正常足月新生儿脐血为对照组,对36例HIE患儿极期、恢复初期血清sICAM-1水平进行观察。血清sICAM-1水平采用双抗体夹心酶联免疫(ELISA)法检测。统计学处理采用方差分析、q检验。结果 HIE患儿36例极期血清sICAM-1[(216.64±85.32)μg／L]较对照组[(6.16±4.05)μg／L]显著升高(q=17.41 P<0.001);恢复初期血清sICAM-1水平[(78.44±31.68)μg／L]较极期显著下降(q=14.27 P<0.001),但仍显著高于对照组(q=5.98 P<0.001)。结论 HIE极期血清sIC-MA-1水平急剧升高。ICAM-1参与HIE脑损伤的病理过程。

重复正加速度暴露对大鼠心肌血管内皮超微结构和ICAM-1表达的影响

目的 :观察重复正加速度 (+Gz)暴露对大鼠心肌血管内皮细胞超微结构的影响及其暴露后细胞间粘附分子 1(ICAM 1)表达的变化情况 ,进一步探讨高 +Gz暴露致心肌损伤的机理。方法 :30只雄性Wistar大鼠随机分成 3组 (n =10 ) ,其中对照组不受 +Gz作用 ;正加速度组分为 +1Gz组 :受 +1Gz作用 ,+10Gz组 :重复 +10Gz暴露 (+10Gz 30s,5counts/d ,3d/w ,3w)。于末次 +Gz作用后次日同时处死大鼠 ,速取左室心肌 ,常规透射电镜制样、观察。另取左室心肌制成石蜡切片 ,行免疫组化检测。结果 :重复 +10Gz作用后 ,心肌间质弥漫水肿 ,小血管内皮细胞肿胀 ,吞饮泡增多 ,血管内皮细胞ICAM 1含量也明显增加 (P <0 .0 5 ) ,而 +1Gz组心肌血管内皮结构及其I CAM 1含量与对照组之间无明显差别。结论 :重复 +Gz暴露后 ,大鼠心肌血管内皮细胞可出现明显损伤 ,其I CAM 1表达增多 ,提示粘附分子诱导的炎症反应参与了高

缺氧缺血性脑病新生儿血清TNF-α和sICAM-1变化及其临床意义

目的观察新生儿缺氧缺血性脑病(HIE)患儿血清肿瘤坏死因子-α(TNF-α)和可溶性细胞间黏附分子-1(sICAM-1)的水平变化,探讨其在HIE中的作用。方法应用酶联免疫吸附法(ELISA)检测58例HIE患儿血清TNF-α和sICAM-1的水平,其中中重度28例,轻度30例,并与20例正常新生儿对照,采用方差分析进行统计学分析。结果中重度及轻度HIE患儿血清TNF-α和sICAM-1水平均高于正常对照组,差异有统计学意义(P均<0.05);中重度HIE患儿与轻度HIE组比较,差异有统计学意义(P<0.05)。结论TNF-α和sICAM-1可能通过缺氧缺血后的免疫功能改变、炎症反应参与HIE患儿的病理过程,血清TNF-α和sICAM-1水平可作为HIE严重程度和预后判断的早期分子生物学指标。