裸鼠肝癌转移模型组织中细胞间粘附分子1的表达

研究细胞间粘附分子１（ＩＣＡＭ－１）在肝癌转移过程中的作用和作为预测肝癌转移标志物的价值。方法以裸鼠人肝癌转移模型为材料,以ｄｏｔｉｍｍｕｎｏ－ｂｌｏｔ的方法测定不同生长时间肝癌组织中ＩＣＡＭ－１的表达。结果ＩＣＡＭ－１在肝癌组织中的表达与肿瘤的生长时间呈明显的正相关（ｒ＝０．８８,Ｐ＜０．０１）,与肿瘤大小呈正相关（ｒ＝０．０５,Ｐ＜０．０５）,在肝癌转移发生后ＩＣＡＭ－１表达突然升高,以后维持在较高水平,肿瘤转移组高于无转移组（Ｐ＜０．０１）,多脏器转移组高于单脏器转移组（Ｐ＜０．０５）。结论组织中ＩＣＡＭ－１的表达可以反映裸鼠人肝癌的生长转移状态,可以作为预测其转移的标志物。     

Intercellular adhesion molecule-1 mediated interactions and leucocyte infiltration in IgA nephropathy

Background: Mononuclear leucocytes have a role in IgA nephropathy (IgAN). Renal leucocyte recruitment is mediated by adhesive interactions between leucocytes and their ligands on renal cells. Methods: We have assessed interstitial and glomerular leucocytes by avidin-biotin-peroxidase with monoclonal antibodies (MA) against leucocytes (CD45), {beta}2-integrin (CD18), monocyte-macrophages (CD14), T (CD3) and T-cell subsets (CD4, CD8), and intercellular adhesion molecule 1 (ICAM-1) (CD54), and analysed their relation with the abnormal expression of ICAM-1 on proximal tubule epithelium in sequential renal sections from 48 patients with IgAN stratified according to the severity of the interstitial cellular infiltration observed by light microscopy. Results: In IgAN without (n=15) and with (n=7) interstitial cellular infiltration of 1+, ICAM-1 expression on vascular endothelium was unchanged with respect to that observed in the normal kidney; the proximal tubule epithelium was negative for this stain. In IgAN with interstitial cellular infiltration of 2+ (n=10), 3+ (n=11), and 4+ (n=5), ICAM-1⁺ stain was observed on the proximal tubule epithelium, the median value of its quantitative expression being 0.3, 0.1, and 0.2 (P=0.0008), respectively. The tubular ICAM-1⁺ stain was significantly associated with the interstitial leucocytes identified by MA, and correlated with CD45⁺ (r=0.59, P=0.02), CD14⁺ (r=0.54, P<0.02), and CD3⁺ (r=0.51, P=0.02) interstitial leucocytes in IgAN with interstitial cellular infiltration. Interstitial ICAM-1⁺ and CD18⁺ leucocytes were correlated (r=0.56, P<0.001). Correlation was found between the quantitative tubular expression of ICAM-1⁺ and the number of CD45⁺ (r=0.98, P<0.0001), CD3⁺ (r=0.48, P=0.02), and CD8⁺ (r=0.76, P<0.02) glomerular leucocytes. Conclusion: Our results suggest that tubular and interstitial ICAM-1⁺ cells may participate in adhesive interactions with interstitial leucocytes. Interstitial T-cells and macrophages as well as glomerular T-cells bearing predominantly CD8⁺ phenotype could play a role in the induction of the tubular expression of ICAM-1 in IgAN.     

血小板内皮细胞粘附分子-1在机械通气致肺损伤中的作用

目的：探讨血小板内皮细胞粘附分子－1（PECAM－1）在机械通气致肺损伤中的作用。方法：24只普通健康小猪，随机等分为对照组，低潮气量（A组），正常潮气量组（B组）及大潮气量组（C组），持续给予不同潮气量通气，利用免疫组织细胞化学技术，髓过氧化物酶（MPO）测定法及病理组织切片技术，分别检测不同潮气量组通气1d,3d,7d后肺血管内皮细胞表面PECAM－1表达量，血清和肺组织匀浆中MPO活性的变化及肺血管内皮细胞结构及连接的改变。结果：A，B，C组血清，肺组织匀浆MPO活笥较对照组升高（P＜0．05或0．01），A，B，C组肺血管内皮组织表面PECAM－1对照组表达下调（P＜0．05或0．01），内皮细胞及基膜肿胀，内皮细胞间间隙增大，均以7d后明显，尤以A，C组显著。结论：PECAM－1在机械通气致肺损伤中可能发挥重要作用。     

结肠癌患者肿瘤组织及外周血ICAM-1和VCAM-1表达的研究

目的:检测结肠癌患者肿瘤组织中细胞间粘附分子-1(intercellular adhension molecular-1,I-CAM-1)和血管细胞粘附分子-1(vascular cell adhesion molecular-1,VCAM-1)的表达,同时测定血清中可溶性ICAM-1(sICAM-l)和可溶性VCAM-1(sVCAM-1)水平,探讨二者与结肠癌生物学特性及预后的关系。方法:应用免疫组化SP法对32例结肠癌组织、17例溃疡性结肠炎组织和21例正常结肠组织标本进行ICAM-1与VCAM-1表达检测,分析其与结肠癌临床病理指标的关系。ELISA法检测结肠癌患者手术前后外周血sICAM-1和sVCAM-1含量,分析治疗前后水平的变化。结果:结肠癌组织ICAM-1和VCAM-1的阳性表达率显著高于溃疡性结肠炎组织(P<0.05)及正常结肠组织(P<0.01),其表达水平与患者年龄、性别、肿瘤大小和病理学分级无关(P>0.05),与肿瘤分期及有无远处转移有关(P<0.05);结肠癌患者外周血sICAM-1和sVCAM-1水平明显高于溃疡性结肠炎患者(P<0.05)及正常对照组(P<0.01),结肠癌患者术后1周sICAM-1及sVCAM-1水平明显下降(P<0.01,P<0.01)。结论:结肠癌患者肿瘤组织及外周血ICAM-1和VCAM-1的表达可能与结肠癌的浸润转移有关;sICAM-1、sVCAM-1的检测可能成为监测结肠癌病情进展和评价治疗效果的有价值指标。     

Increased expression of intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 in rat cardiac allografts

This study was designed to investigate the role of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) during chronic cardiac allograft rejection. Wistar rats were used as donors, and SD rats as recipients heterotopic cardiac transplants. Recipients pretreated with inoculation of donor splenocytes (SPC) followed by cyclophosphamide (CP) were divided into 4 groups: (A) untreated group (n = 18) without immunosuppression; (B) SPC plus CP-treated group (n = 18) that were euthanized at 15-120 days posttransplantation; (C) CsA-treated group (n = 18) euthanized at 2-3 months posttransplantation; and (D) tolerance group (n = 18) treated with SPC plus CP and monitored for at least 1 year posttransplantation. Cardiac allografts were harvested at various times for immunohistochemical studies performed to evaluate the expression of ICAM-1 and VCAM-1. Pretreatment of animals with SPC and CP induced long-term cardiac allograft survival. Immunohistochemical staining demonstrated a low level of ICAM-1 and VCAM-1 expression in cardiac allograft muscle and coronary arteries among Groups B and D. In contrast, the expressions of ICAM-1 and VCAM-1 in cardiac allografts of Groups A and C were significantly higher than those in Groups B and D. Our results suggested that the expression of ICAM-1 and VCAM-1 plays an important role during the development of chronic cardiac allograft rejection.     

Role of integrins and intracellular adhesion molecule-1 in lung injury after intestinal ischemia-reperfusion

BACKGROUND: We tested the hypothesis that lung injury after intestinal ischemia-reperfusion (IR) requires the activation of CD11/CD18 glycoprotein complex and its ligand, intracellular adhesion molecule-1 (ICAM-1), on pulmonary endothelial surface. METHODS: Rats were assigned to one of six groups including sham operation, intestinal IR (60/120 min) and IR plus treatment with one of the following monoclonal antibodies against CD11a, CD11b, CD18, and ICAM-1. Pulmonary microvascular permeability, neutrophil accumulation, and expression of adhesion molecules were evaluated. RESULTS: Intestinal IR resulted in lung injury characterized by a marked increase in microvascular permeability, neutrophil accumulation and upregulated expression of leukocyte integrins and ICAM-1. The increase in pulmonary microvascular permability and neutrophil accumulation elicited by intestinal reperfusion was effectively prevented by administration of blocking antibodies against ICAM-1, CD11, and CD18. CONCLUSIONS: These results indicate that adhesion molecules contribute to the lung injury after intestinal IR. Immunoneutralization of certain of these adhesion molecules may prevent intestinal IR-induced lung injury.     

Hepatic ischemia/reperfusion injury in P-selectin and intercellular adhesion molecule-1 double-mutant mice

Neutrophil adhesion and recruitment represents one of the early cellular events that occur during hepatic ischemia/reperfusion (IR) injury and plays a critical role in determining the extent of tissue damage. The adhesion molecules, such as selectins and intercellular adhesion molecules (ICAM), are important in mediating neutrophil-endothelial cell interactions and neutrophil emigration. The goal of this study was to evaluate the role of P-selectin and ICAM-1 in hepatic IR injury. Male wild-type and P-selectin/ICAM-1-deficient (P/I null) mice underwent 90 minutes of partial hepatic ischemia followed by reperfusion at various time points (0, 1.5, 3, and 6 hours). Reperfusion caused a time-dependent hepatocellular injury in both wild-type and P/I null mice as judged by plasma alanine aminotransferase (ALT) levels and liver histopathology examination. Although ALT levels were slightly lower in the P/I null mice compared with the wild-type mice the differences were not statistically significant. Neutrophil infiltration to the ischemic liver was observed in both mouse groups after 6 hours of reperfusion; however, the infiltration to the midzonal region of the ischemic liver was more pronounced in the wild-type group. This study suggests that hepatocellular injury induced after hepatic IR was independent of P-selectin and ICAM-1 in this model of acute inflammatory tissue injury.     

Diminished lung injury with vascular adhesion molecule-1 blockade in choline-deficient ethionine diet-induced pancreatitis

BACKGROUND: Lung injury in severe acute pancreatitis is mediated by infiltrating leukocytes. Our laboratory has previously demonstrated that acute lung injury in acute pancreatitis results in an up-regulation of vascular adhesion molecule-1 (VCAM-1) cell surface receptor expression on pulmonary vascular endothelium and neutrophil sequestration. The objective of this study was to determine whether blocking expression of VCAM-1 in acute pancreatitis would modify acute pulmonary injury. METHODS: Young female mice were fed a choline-deficient ethionine (CDE) supplemented diet to induce acute pancreatitis. After initiation of the diet, one group (acute pancreatitis treated [n = 18]) was treated with blocking doses (2.35 mg/kg) of monoclonal anti-VCAM-1 receptor antibody (Ab) at 48, 96, and 120 hours. A second group (acute pancreatitis treated control [n = 5]) was treated with a similar dose of an isotypic control for VCAM-1 (nonbinding Ab) at the same time points. A third group (acute pancreatitis untreated [n = 12]) received a CDE diet, and a fourth group (control [n = 11]) received standard food with no Ab treatment. All animals were killed at 144 hours. The dual radiolabeled monoclonal Ab method was used to quantitate VCAM-1 cell surface expression in lung tissue. Lung injury was assessed histologically, and apoptosis was detected by transferase-mediated deoxyuridine triphosphate nick end labeling assay. Pulmonary leukocyte sequestration was determined by myeloperoxidase (MPO) assay and CD18 staining. RESULTS: Pulmonary VCAM-1 cell surface expression was significantly increased in animals with acute pancreatitis when compared to controls (P <.001) and was reduced to near control levels in acute pancreatitis treated animals. On histologic examination, treated animals with acute pancreatitis exhibited significantly less lung injury and apoptosis than did untreated animals with acute pancreatitis. Leukocyte sequestration and MPO activity were significantly reduced in the treated animals with pancreatitis compared to untreated animals with pancreatitis (P <.0001) or acute pancreatitis treated controls (P <.03). CONCLUSIONS: Blocking VCAM-1 on pulmonary vascular endothelium decreases leukocyte adherence and recruitment into the lung, hence reducing lung injury in severe acute pancreatitis. Clinically, VCAM-1 antagonism may be an important adjunct to evolving therapy for distant organ injury in severe acute pancreatitis.     

中性粒细胞介导的肝脏缺血再灌注损伤

肝脏的缺血再灌注损伤是肝脏移植术、肝脏部分切除术、失血性和心源性休克等手术和临床疾病所共同经历的一个病理生理过程。近年研究表明 ,肝脏缺血再灌注后的损伤分为两个时相[1] :Ⅰ相 ,主要为枯否细胞 (Kupffercell,KC)激活后 ,连同其所分泌的因子如TNF α、IL 1等引起的损伤[2 ] ;Ⅱ相 ,则是在KC、细胞趋化因子、细胞粘附分子等共同作用下 ,使中性粒细胞 (polymorphnuclearleukocyte,PMN)趋化、粘附聚集、活化所介导的损伤[3 ] 。后者是肝脏缺血再灌注损伤的关键 ,其结果是肝细胞的坏死和凋亡 ,最终引起肝脏功能衰竭 ,甚至全身多…     

组织细胞间粘附分子-1在阻塞性黄疸小肠粘膜损伤中的作用及丹参防治机制的研究

目的：研究组织细胞间粘附分子－1（ICAM－1）在阻塞性黄疸（阻黄）小肠粘膜损伤中的作用及丹参防治小肠粘膜损伤机制。方法：SD大鼠48只分为4组：假手术对照组（SO＋NS）、阻黄组（BDL＋NS）、治疗对照组（SO＋SM）及丹参治疗组（BDL＋SM），每组术后再随机分设7、14d两个时相点。在不同时相点检测小肠组织髓过氧化物酶活性（MPO）、ICAM－1、二胺氧化酶（DAO）、血浆内毒素水平变化，并与丹参治疗组进行比较。结果：BDL＋NS组7、14d时小肠DAO的活性降低，MPO活性增高P＜0．05），门表脉血浆内毒素增加，ICAM－1主要表达在小肠粘膜上皮组织，且表达逐渐增强（P＜0．05）；BDL＋SM组7、14d时小肠组织DAO活性显著升高，门静脉血浆内毒素降低，ICAM－1表达受到抑制（P＜0．05），MPO改变不明显。结论：阻黄引起小肠上皮细胞上的ICAM－1表达上调，参与了中性粒细胞（PMN）介导的小肠粘膜损伤；丹参是通过抑制ICAM－1的表达而减轻小肠粘膜的损伤。     

Proteinase 3 enhances endothelial monocyte chemoattractant protein-1 production and induces increased adhesion of neutrophils to endothelial cells by upregulating intercellular cell adhesion molecule-1

Wegener's granulomatosis is an autoimmune disease that is characterized by systemic vasculitis and granuloma formation. Early influx of polymorphonuclear neutrophils (PMN), followed at a later stage by mononuclear cells, contributes to the granulomatous inflammation. Previous studies have shown that proteinase 3 (PR3), the major autoantigen in Wegener's granulomatosis, specifically binds to endothelial cells and plays a possible role in activation of these cells by enhancing interleukin-8 production, thus providing a chemotactic and activating stimulus for PMN. The present study demonstrated that PR3 enhances the production of monocyte chemoattractant protein-1 (MCP-1) by human umbilical vein endothelial cells (HUVEC) in a dose- and time-dependent manner. The PR3-induced increase in MCP-1 production was demonstrated at both the protein and the mRNA levels and was chemotactic for monocytes. In addition, it was demonstrated that PR3 induces a dose- and time-dependent increase in the expression of intercellular adhesion molecule-1 (ICAM-1) as determined by fluorescence-activated cell sorter analysis. The PR3-induced increase in expression of ICAM-1 was also demonstrated at the mRNA level. PR3 induced a slight increase in vascular cell adhesion molecule-1 expression and had no effect on the expression of both P- and E-selectin. Incubation of HUVEC for 24 h in the presence of PR3 resulted in a significant increase in adhesion of PMN, which was reduced to baseline levels in the presence of blocking monoclonal antibody anti-ICAM-1 or anti-CD18 or a combination of both. Monocytes showed a slight but statistically not significant increase in adhesion. Incubation of HUVEC with PR3 for 4 h did not result in enhanced adhesion of either PMN or monocytes. It was hypothesized that PR3, which may be released locally at inflammatory sites after activation of cytokine primed PMN, plays a role in endothelial cell activation by enhancing both interleukin-8 and MCP-1 production, thus providing a chemotactic and activating stimulus for both PMN and monocytes. In addition, PR3 may contribute to the ongoing inflammation by enhancing the adhesion of PMN to endothelial cells by upregulating ICAM-1 expression.     

脊髓缺血-再灌注损伤细胞间粘附分子-1及白细胞介素-1β的表达

目的:探讨脊髓缺血-再灌注损伤细胞间粘附分子-1(ICAM-1)及白细胞介素-1β(IL-1)的表达对血脊髓屏障损害的分子机制。方法:将77只同龄Wistar大鼠,随机分为正常对照组、单纯缺血组和缺血再灌组。手术方法采用Zivin法复制模型。应用逆转录-聚合酶链反应、地高辛标记cDNA探针技术、免疫组化及免疫荧光激光共聚焦扫描显微镜技术检测脊髓再灌注损伤血管内皮ICAM-1mRNA和IL-1βmRNA表达量。结果:正常组和单纯缺血组未引起细胞因子和粘附分子表达量的增加。而缺血再灌注后缺血区细胞因子、粘附分子的表达及多形核白细胞(PMN)的浸润先后发生了改变。再灌注2h,IL-1βmRNA的表达首先升高,约为对照组的2倍。再灌注6h达到高峰,并持续到12h。ICAM-1mRNA表达量于再灌注4h明显升高,再灌注12h其在单位微血管面积上的荧光强度约比单纯缺血组增加了1/2。结论:再灌注损伤后脊髓微血管内皮ICAM-1及其调节因子IL-1β的表达量增加是导致血脊髓屏障损害的重要分子基础。     

肠缺血-再灌注大鼠不同组织ICAM-1表达的规律

目的:了解肠缺血-再灌流过程中不同脏器 ICAM-1表达的时间、空间规律。方法:用 RT-PCR 和免疫组化的方法检测肠缺血-再灌流大鼠肠、肝和肺组织中 ICAM-1mRNA 和蛋白表达的变化。结果:肠组织中的ICAM-1 mRNA 和蛋白在肠缺血期及再灌流1h 表达增加,肝脏和肺脏毛细血管内皮上的 ICAM-1表达增加在再灌流后2h 和6h,晚于肠组织,并且与组织中性白细胞的聚集增加一致。结论:肠缺血-再灌流大鼠不同组织的ICAM-1表达的变化呈现序贯性。     

Mesangial cell accessory functions: mediation by intercellular adhesion molecule-1

Mesangial cell (MC) proliferation is an early pathologic alteration characteristic of many forms of immune mediated glomerulonephritis. The intracapillary position, contractile capacity, and production of cytokines and other inflammatory molecules place MC in a pivotal position to initiate, mediate, and direct glomerular damage. We as well as others have noted increased levels of cytokines including IFN gamma, TNF, and IL-1 and the cell surface MHC class II and ICAM-1 molecules in the kidneys of mice with lupus nephritis. MHC class II and ICAM-1 molecules are central to the interaction of T cells with antigen presenting cells (APC). Since cytokines can increase both MHC class II and ICAM-1 molecules, we investigated whether mesangial cells could function as APC or accessory cells after cytokine stimulation. For these studies we established a permanent MC line through transformation with origin-deficient SV40 DNA. Surface expression of ICAM-1 was similar in untransformed MC as well as SV40 transformed MC from normal mice and in untransformed cells from mice with lupus nephritis. Basal expression of ICAM-1 was upregulated rapidly by IFN gamma, TNF, and IL-1. MHC class II expression could not be induced with TNF or IL-1 alone but required prolonged stimulation with IFN gamma. MC adhered and presented antigen to an antigen specific IaK restricted T cell hybridoma. Anti-ICAM-1 mAb decreased adhesion and antigen presentation of cytokine stimulated MC. By comparison, MHC class II mAb abrogated antigen presentation by MC bearing MHC class II but did not block adhesion.(ABSTRACT TRUNCATED AT 250 WORDS)     

Kidney injury molecule-1 in kidney disease

Kidney injury molecule-1(KIM-1) is a type I membrane protein, comprising an extracellular portion and a cytoplasmic portion, which is expressed at very low levels in the normal kidney. The extracellular portion can cleave and rapidly enter tubule lumens after kidney injury, and can then be detected in the urine. It has been confirmed that the urine KIM-1 level is closely related to tissue KIM-1 level and correlated with kidney tissue damage. Not only is KIM-1 proven to be an early biomarker of acute kidney injury but it also has a potential role in predicting long-term renal outcome. This review summarizes the relationships between KIM-1 and kidney injury, especially in chronic kidney disease.     

颅脑损伤后血清中sICAM-1和IL-1β含量变化的意义

目的 动态观测急性颅脑损伤患者血清中sICAM-1和IL-1β含量的变化．探讨其临床意义。方法 按入院先后随机选取25例被CT证实的颅脑损伤患者，按照入院时、24．48．96小时四个时间段分别采集血标本，应用双抗体夹心酶联免疫吸附法（ELISA）测定sICAM-1和IL-1β的含量．并与对照组比较。结果 颅脑损伤患者早期sICAM-1含量较对照组无变化，在48小时明显升高，并持续升高至96小时（P〈0．05）。sICAM-1含量与损伤程度无关，而与预后相关。皿清中IL-1β含量于入院时就有明显升高（P〈0．05），IL-1β升高不仅与损伤程度有关，而且与预后也密切相关。血清中IL-1β含量与sICAM-1含量相关。结论 血清中sICAM-1和IL-1β参与了颅脑后继发性脑损伤，sICAM-1和IL-1β升高反映了颅内的炎症反应。