辛伐他汀对糖尿病大鼠肾组织中核因子-κB活性和ICAM-1表达的影响

目的:探讨辛伐他汀对实验性2型糖尿病大鼠肾组织中核因子NF-κB及炎性细胞因子细胞间粘附分子-1(ICAM-1)的影响及其机制。方法:将36只大鼠随机分为对照组,糖尿病组和糖尿病辛伐他汀处理组,后两组以高糖高脂饮食加小剂量链脲佐菌素(STZ)制备实验性2型糖尿病大鼠模型。采用免疫组织化学染色法检测各组大鼠肾组织中NF-κB、ICAM-1的表达水平并作比较。结果:糖尿病组大鼠肾组织中NF-κB、ICAM-1的表达较对照组明显增加。以辛伐他汀处理4周后,NF-κB、ICAM-1活性降低(P<0.05),肾功能各指标及肾组织病理学损害改善。结论:实验性2型糖尿病大鼠肾组织中NF-κB活性增加,炎性细胞因子ICAM-1表达上调。辛伐他汀的肾保护作用至少部分是与其不依赖调血脂作用的,减少肾组织中NF-κB的活性和ICAM-1的表达有关。     

细胞间黏附分子-1在高血压左室肥厚发病中的作用及丹参酮ⅡA对其表达的影响

目的:探讨细胞间黏附分子-1(ICAM-1)在高血压左室肥厚发生中的作用及丹参酮ⅡA对其表达的影响.方法:12周龄雄性Wistar-Kyoto(WKY)大鼠和自发性高血压大鼠(SHR)共30只,随机分为对照组、高血压组、丹参酮ⅡA组.丹参酮ⅡA组经尾静脉连续注射丹参酮ⅡA 治疗12周.断头处死大鼠后留取心肌标本,进行苏木素-伊红(HE)、范吉逊(VG)染色,观察心肌细胞形态和胶原分布情况;免疫组化染色及ED1标记显示心肌巨噬细胞浸润;逆转录-聚合酶链反应检测心肌ICAM-1 mRNA表达;酶联免疫吸附试验(ELISA)检测ICAM-1的蛋白表达.结果:与对照组WKY大鼠比较,SHR组肥厚心肌中ICAM-1的mRNA及蛋白表达均显著增加(P<0.01和P<0.05),巨噬细胞浸润明显(P<0.01).应用丹参酮ⅡA治疗后,SHR组的心肌ICAM-1的mRNA及蛋白表达水平均显著下调(P<0.01和P<0.05),巨噬细胞浸润数减少(P<0.05),心肌细胞肥大和间质纤维化程度明显减轻.结论:心肌ICAM-1过度表达及其介导的炎性细胞浸润在高血压左室肥厚的发病过程中具有重要作用;丹参酮ⅡA抑制左室肥厚的效应可能与其下调ICAM-1表达,减少炎性细胞的心肌浸润有关.     

乙型肝炎肝硬化患者血清可溶性细胞间黏附分子-1、白细胞介素-18测定及临床意义

目的:探讨乙型肝炎肝硬化患者血清可溶性细胞间黏附分子-1(soluble intercellular adhesion molecule-1,sICAM-1)、白细胞介素(interleukin,IL)-18的变化及其临床意义.方法:采用ELIAS法对60例乙型肝炎肝硬化患者(肝硬化组)和30例健康体检者(对照组)血清sICAM-l、IL-18水平进行检测.结果:肝硬化组血清sICAM-1,IL-18水平高于对照组(P<0.01).肝硬化Child C级组血清siCAM-1,IL-18水平高于Child A级组和B级组,Child B级组高于Child A级组,差异均有统计学意义(P<0.01).肝硬化组血清sICAM-1,IL-18水平与凝血酶原活动度,白蛋白呈负相关,与总胆红素呈正相关,与丙氨酸转氨酶无相关性.血清sICAM-1水平与IL-18呈正相关.结论:sICAM-1,IL-18水平在一定程度上反映肝细胞损伤程度和肝硬化严重程度,可为临床诊治、评判预后提供依据.     

急性肺损伤模型大鼠核因子κB和细胞间黏附分子1表达与川芎嗪的干预

背景：研究表明,川芎嗪在抗肺纤维化方面发挥重要作用,但对川芎嗪抗急性肺损伤作用及其机制的研究较少。目的：观察大鼠油酸性急性肺损伤时,核因子κB和细胞间黏附分子1在肺组织中的表达及其变化。方法：采用静脉注射油酸的方法建立大鼠急性肺损伤模型,建模后并分别用川芎嗪和地塞米松进行干预。结果与结论：建模成功后,模型组大鼠肺系数明显升高（P〈0.05）。免疫组织化学染色结果显示,模型组肺组织核因子κB和细胞间黏附分子1的表达明显增强（P〈0.05）;应用川芎嗪和地塞米松干预后上述变化明显减轻（P〈0.05）。证实川芎嗪对急性肺损伤时的肺组织起到明显的保护作用,其保护机制与川芎嗪抑制核因子κB和细胞间黏附分子1的表达有关。     

急性肺损伤模型大鼠核因子κB和细胞间黏附分子1表达与川芎嗪的干预

背景:研究表明,川芎嗪在抗肺纤维化方面发挥重要作用,但对川芎嗪抗急性肺损伤作用及其机制的研究较少.目的:观察大鼠油酸性急性肺损伤时,核因子κB 和细胞间黏附分子1 在肺组织中的表达及其变化.方法:采用静脉注射油酸的方法建立大鼠急性肺损伤模型,建模后并分别用川芎嗪和地塞米松进行干预.结果与结论:建模成功后,模型组大鼠肺系数明显升高(P < 0.05).免疫组织化学染色结果显示,模型组肺组织核因子κB和细胞间黏附分子1 的表达明显增强(P < 0.05);应用川芎嗪和地塞米松干预后上述变化明显减轻(P < 0.05).证实川芎嗪对急性肺损伤时的肺组织起到明显的保护作用,其保护机制与川芎嗪抑制核因子κB 和细胞间黏附分子1 的表达有关.     

西洛他唑对人脐静脉内皮细胞血管细胞黏附分子1和细胞间黏附分子1mRNA表达的影响

目的观察西洛他唑对人脐静脉内皮细胞（HUVECs）血管细胞黏附分子1（VCAM-1）和细胞间黏附分子1（ICAM-1）mRNA表达的影响,探讨西洛他唑可能的抗动脉粥样硬化作用机制。方法将HUVECs用不同浓度的西洛他唑（0μg/L、0.05μg/L、0.1μg/L、1.0μg/L、10μg/L）溶液处理1小时后,用肿瘤坏死因子α（TNF-α）10μg/L诱导24小时。半定量复合逆转录聚合酶链反应（RT-PCR）测定黏附分子VCAM-1和ICAM-1mRNA的表达。结果 TNF-α能上调VCAM-1和ICAM-1的表达,西洛他唑在一定程度上可抑制上述作用,随着西洛他唑浓度的增加,ICAM-1mRNA表达水平逐步下降,分别为0.239±0.012、0.205±0.012、0.166±0.010、0.136±0.008,VCAM-1mRNA表达水平也逐步下降,分别为0.114±0.048、0.093±0.051、0.083±0.045、0.068±0.039。结论西洛他唑可抑制TNF-α诱导的HUVECs的黏附分子VCAM-1和ICAM-1mRNA表达,提示西洛他唑的抗动脉粥样硬化作用可能是通过阻止血单核细胞向血管内皮细胞聚集和黏附实现的。     

急性脑梗死患者血清TNF-α、IL-1β和sICAM-1含量变化

目的：观察脑梗死患者血清TNF－α、IL－1β和sICAM-1含量的变化及意义。方法：采用双抗体夹心酶联免疫吸附法（ELISA）测定50例脑梗死患者急性期、恢复期血清中TNF－α、IL－1β和sICAM-1含量，并与40例正常对照组比较。结果：急性期、恢复期脑梗死患者血清TNF－α、IL－1β和sICAM-1水平较对照组显著增高（P＜0．01），急性期又较恢复期高（P＜0．05），增高程度与神经功能缺损程度及梗死体积大小密切相关，且血清中TNF－α含量与IL－1β和sICAM-1也相关。结论：TNF－α、IL－1β和sICAM-1互相作用参与了急性脑梗死的炎症反应和再灌注损伤。     

Early up-regulation of intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 expression in rats with hemorrhagic shock and resuscitation.

This study evaluated the effect of resuscitation fluids on intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). Sprague-Dawley rats (n = 36) were subjected to a 27 mL/kg hemorrhage over 5 min followed by a 1 h shock and 1 h resuscitation. Animals groups included: 1) cannulation only (Sham); 2) hemorrhage only (NR); 3) resuscitation with 1:1 shed blood (Blood); 4) resuscitation with 3:1 lactated Ringer's (81 mL/kg, 3LR+); 5) no hemorrhage but infusion with 3:1 lactated Ringer's (3LR); and 6) resuscitation with .36:1 hypertonic saline (7.5%, 9.7 mL/kg, HTS). At the end of resuscitation, the spleen and lung were harvested for detection of adhesion molecule mRNA and protein by RT-PCR and immunostaining. ICAM-1 and VCAM-1 expression exhibited the following pattern: 3LR+ > HTS approximate to 3LR > Blood approximate to NR approximate to Sham. VCAM-1 mRNA in the lung of the 3LR+ group was 2 or more times more than the groups of Sham, NR, Blood, and 3LR (p < .05). ICAM-1 and VCAM-1 mRNA in the spleen was significantly increased in the 3LR+ group compared with the groups of Sham, NR, and Blood (p < .05). Animals in the 3LR+ group showed enhanced staining for ICAM-1 in the pulmonary microvessels and in the marginal and trabecular areas of the spleen. Pulmonary edema and inflammatory cell infiltration were observed only in the 3LR+ group. In summary, resuscitation with LR following hemorrhagic shock induced immediate up-regulation of ICAM-1 and VCAM-1, which was associated with tissue injury. Thus, the type of resuscitation fluid used affected resuscitation injury.     

通心络对大鼠脑缺血再灌注模型微血管细胞间黏附分子1和血管细胞黏附分子1表达的影响

背景：现代医学发现通心络制剂除了具有抗凝和抑制血小板聚集作用外，对血管内皮细胞有一定的保护作用。目的：观察中药复方制剂通心络是否影响脑缺血再灌注动物模型黏附分子的表达。设计：随机对照实验。单位：解放军第二军医大学长征医院神经内科。材料：实验于2002—10／2003—01在解放军第二军医大学长征医院神经内科实验室完成。选择雄性SD大鼠25只，随机分为假手术组5只、模型组10只和通心络组10只。方法：线栓法制备大鼠大脑中动脉脑局灶性脑缺血再灌注模型，假手术组除将尼龙线插在颈外动脉接近颈内动脉分叉处外，其余同模型组。通心络组大鼠在缺血再灌注前给予通-15,络粉剂1．0g／（kg-d），溶在生理盐水中灌胃1周。模型组和假手术组灌胃等剂量生理盐水。各组大鼠麻醉后取脑制备切片．行常规苏木精-伊红染色、免疫组化及原位杂交染色。主要观察指标：①缺血再灌注后细胞间黏附分子1和血管细胞黏附分子1阳性微血管表达数目。②缺血再灌注后细胞间黏附分子1mRNA阳性微血管表达数目。结果：①假手术组手术侧大脑半球皮质和基底节区未见细胞间黏附分子1、血管细胞黏附分子1蛋白和细胞间黏附分子1mRNA阳性微血管表达。②模型组大鼠缺血2h再灌注6h后，缺血侧大脑细胞间黏附分子1、血管细胞黏附分子-1蛋白表达水平和细胞间黏附分子1mRNA表达水平显著升高。③通心络组缺血侧大脑半球皮质和基底节区蛋白和mRNA阳性微血管数较模型组显著降低[（10．42&;#177;1．98），（12．42&;#177;2．14）／高倍视野；（8．54&;#177;2．00），（11．12&;#177;1．56）／高倍视野]（P〈0．05），血管细胞黏附分子1蛋白阳性微血管表达数目无显著变化（P〉0．05）。结论：通心络可以降低大鼠脑缺血再灌注后细胞间黏附分子1的转录和翻译过程，有助于减轻脑缺血后的炎症性损伤过程。     

通心络对大鼠脑缺血再灌注模型微血管细胞间黏附分子1和血管细胞黏附分子1表达的影响

背景:现代医学发现通心络制剂除了具有抗凝和抑制血小板聚集作用外,对血管内皮细胞有一定的保护作用。目的:观察中药复方制剂通心络是否影响脑缺血再灌注动物模型黏附分子的表达。设计:随机对照实验。单位:解放军第二军医大学长征医院神经内科。材料:实验于2002-10/2003-01在解放军第二军医大学长征医院神经内科实验室完成。选择雄性SD大鼠25只,随机分为假手术组5只、模型组10只和通心络组10只。方法:线栓法制备大鼠大脑中动脉脑局灶性脑缺血再灌注模型,假手术组除将尼龙线插在颈外动脉接近颈内动脉分叉处外,其余同模型组。通心络组大鼠在缺血再灌注前给予通心络粉剂1.0g/(kg·d),溶在生理盐水中灌胃1周。模型组和假手术组灌胃等剂量生理盐水。各组大鼠麻醉后取脑制备切片,行常规苏木精-伊红染色、免疫组化及原位杂交染色。主要观察指标:①缺血再灌注后细胞间黏附分子1和血管细胞黏附分子1阳性微血管表达数目。②缺血再灌注后细胞间黏附分子1mRNA阳性微血管表达数目。结果:①假手术组手术侧大脑半球皮质和基底节区未见细胞间黏附分子1、血管细胞黏附分子1蛋白和细胞间黏附分子1mRNA阳性微血管表达。②模型组大鼠缺血2h再灌注6h后,缺血侧大脑细胞间黏附分子1、血管细胞黏附分子-1蛋白表达水平和细胞间黏附分子1mRNA表达水平显著升高。③通心络组缺血侧大脑半球皮质和基底节区蛋白和mRNA阳性微血管数较模型组显著降低犤(10.42±1.98),(12.42±2.14)/高倍视野;(8.54±2.00),(11.12±1.56)/高倍视野犦(P<0.05),血管细胞黏附分子1蛋白阳性微血管表达数目无显著变化(P>0.05)。结论:通心络可以降低大鼠脑缺血再灌注后细胞间黏附分子1的转录和翻译过程,有助于减轻脑缺血后的炎症性损伤过程。     

核因子-κB与细胞间黏附分子-1在角膜移植排斥反应中的表达及环孢素A对两者表达的影响

目的探讨核因子-κB在角膜移植排斥反应中的作用,为进一步研究角膜移植排斥反应发病机制及治疗提供新的思路.方法实验于2004-12/2005-02在南方医科大学珠江医院眼科完成.实验分组同基因移植组Wistar大鼠5只为供者,Wistar大鼠10只为受者;同种异体移植组Wistar大鼠5只为供者,SD大鼠10只为受者.同种异体移植+环孢素A治疗组Wistar大鼠5只为供者,SD大鼠10只为受者.建立大鼠穿透性角膜移植动物模型,用免疫组织化学染色法检测角膜移植术后植片中核因子-κB和细胞间黏附分子-1表达,显微镜下记数植片中央区400倍视野中阳性细胞数的平均值,并以植片排斥反应指数及病理学表现作参照.结果纳入实验大鼠30只,均进入结果分析.①同基因移植组角膜植片中的角膜上皮细胞、基质细胞及内皮细胞有核因子-κB和细胞间黏附分子-1的微弱表达,表达强度分别为3.16±1.25,2.83±1.54;同种异体移植组角膜上皮细胞、内皮细胞、基质层细胞及新生血管内皮细胞核因子-κB和细胞间黏附分子-1表达增强,分别为16.77±2.76,13.63±1.93;同种异体移植环孢素A治疗组角膜上皮细胞、内皮细胞、基质层细胞及新生血管内皮细胞有核因子-κB和细胞间黏附分子-1的弱表达,分别为6.77±1.86,4.57±1.91.②各组间核因子-κB和细胞间黏附分子-1的表达强度有显著性差异(P＜0.01).③对比观察发现,各组角膜植片中NF-κB和细胞间黏附分子-1的表达部位和强度相似,相关性分析核因子-κB与细胞间黏附分子-1的表达强度呈正相关(r=0.875,P＜0.01),且核因子-κB的表达与排斥反应指数也具有明显的正相关性(r=0.829,P＜0.01).结论核因子-κB可能通过调控细胞间黏附分子-1等基因的表达,参与角膜移植排斥反应的发生,在角膜移植免疫中起着中心调控者的作用.而免疫抑制剂GsA通过减弱核因子-κB核转位和发挥活性,抑制排斥反应.     

Serum levels of tetranectin, intercellular adhesion molecule-1 and interleukin-10 in B-chronic lymphocytic leukemia

Background and objective: The fibrinolytic regulator tetranectin (TN), in association with the circulating intercellular adhesive molecule-1 (cICAM-1) and interleukin -10 (IL-10), may be involved in the metastatic cascade of B-chronic lymphocytic leukemia (B-CLL). Our aim was to investigate the potential usefulness of these molecules as prognostic markers in B-CLL.

Design and methods: Therefore, TN, cICAM-1, and IL-10 were assessed (ELISA) in the serum of 53 B-CLL patients, classified in Binet A, B, and C stages in comparison with those in 45 healthy subjects (HS).

Results: TN was significantly lower in B-CLL patients than in HS (9.63 [8.75–11.51] mg/L, 13.75 [12.56–14.64] ng/mL, respectively, p < 10⁻⁵), being lower (p = 0.05) in B and C stage patients (subgroup B+C) than in A stage ones (subgroup A). cICAM-1 levels were significantly higher in B-CLL patients than in HS (475.86 [355.86–593.79] ng/mL vs. 225.62 [118.49–312.83] ng/mL, respectively, p < 10⁻⁵) with a tendency for higher levels in subgroup B+C than in subgroup A. A significant correlation of cICAM-1 with lactate dehydrogenase (LDH) (r_s = 0.532, p = 0.049), and a significant increase in cICAM-1 in B-CLL with diffuse bone marrow infiltration (BMI) compared to that in B-CLL with nondiffuse BMI (624.48 [557.24–726.55] ng/mL vs. 480.34 [368.96–590.34] ng/mL, respectively, p = 0.0172) were found. A significant negative correlation between TN and cICAM-1 (r_s = −0.5017, p = 0.0001) was observed. IL-10 was detected in all B-CLL patients and in no HS (7.37 [5.30–10.55] pg/mL), being higher (p = 0.0153) in C than in A stage patients. A significant correlation of IL-10 with TN and cICAM-1 in subgroup B+C (r_s = −0.659 [p = 0.014] and r_s = 0.679 [p = 0.011], respectively) was found.

Conclusions: The abovementioned findings and good performance characteristics of TN and cICAM-1 in B-CLL suggest the potential usefulness of these adhesive/recognition molecules as prognostic markers in B-CLL. The implication of these molecules along with IL-10 in the disease process deserves further study.     

Prolonged, low dose alpha-tocopherol therapy counteracts intercellular cell adhesion molecule-1 activation

BACKGROUND: Up-regulation of ICAM-1 at the vascular endothelial level is one of the most important promoters in the slow progression of a healthy vessel to an atherosclerotic one. The current study aimed to evaluate whether low dose of the antioxidant alpha-tocopherol affects the circulating soluble (s) ICAM-1 in healthy subjects. METHODS: Either alpha-tocopherol E (50 I.U./day) or placebo was randomly, double-blindly given to 39 healthy male volunteers (mean age 41.6+/-5.9 years) over a period of 20 weeks. RESULTS: At the baseline, sICAM-1 levels were inversely correlated with alpha-tocopherol concentrations (r=-0.525, p<0.0001). Twenty weeks of alpha-tocopherol supplementation (n=20 subjects) significantly decreased the circulating sICAM-1 levels (from 149.2+/-18.4 to 131.5+/-17.2 microg l(-1), p<0.004) while it increased the alpha-tocopherol concentrations (from 25.8+/-5.0 to 31.2+/-5.7 micromol l(-1), p<0.003). No significant changes in plasma sICAM-1 and alpha-tocopherol levels were observed in placebo-treated subjects (n=19). In actively treated subjects, changes in circulating sICAM-1 were inversely correlated with changes in alpha-tocopherol concentrations (r=-0.597, p=0.005). CONCLUSIONS: Plasma sICAM-1 concentrations are stable in healthy subjects over a period of 20 weeks while they significantly decreased with low dose of alpha-tocopherol. Thus, antioxidant vitamins are likely to counteract with endothelial changes that could potentially trigger the atherogenetic process.     

核因子-κB与细胞间黏附分子-1在角膜移植排斥反应中的表达及环孢素A对两者表达的影响

目的：探讨核因子-κB在角膜移植排斥反应中的作用，为进一步研究角膜移植排斥反应发病机制及治疗提供新的思路。方法：实验于2004-12／2005-02在南方医科大学珠江医院眼科完成。实验分组：同基因移植组Wistar大鼠5只为供者，Wistar大鼠10只为受者；同种异体移植组Wistar大鼠5只为供者，SD大鼠10只为受者。同种异体移植＋环孢素A治疗组Wistar大鼠5只为供者，SD大鼠10只为受者。建立大鼠穿透性角膜移植动物模型，用免疫组织化学染色法检测角膜移植术后植片中核因子-κB和细胞间黏附分子-1表达，显微镜下记数植片中央区400倍视野中阳性细胞数的平均值，并以植片排斥反应指数及病理学表现作参照。结果：纳入实验大鼠30只，均进入结果分析。①同基因移植组角膜植片中的角膜上皮细胞、基质细胞及内皮细胞有核因子-κB和细胞间黏附分子-1的微弱表达，表达强度分别为3．16&;#177;1．25，2．83&;#177;1．54；同种异体移植组角膜上皮细胞、内皮细胞、基质层细胞及新生血管内皮细胞核因子-κB和细胞间黏附分子-1表达增强，分别为16．77&;#177;2．76，13．63&;#177;1．93；同种异体移植环孢素A治疗组角膜上皮细胞、内皮细胞、基质层细胞及新生血管内皮细胞有核因子-κB和细胞间黏附分子-1的弱表达，分别为6．77&;#177;1．86，4．57&;#177;1．91。②各组间核因子-κB和细胞间黏附分子-1的表达强度有显著性差异（P〈0．01）。③对比观察发现，各组角膜植片中NF和细胞-κB间黏附分子-1的表达部位和强度相似，相关性分析核因子-κB与细胞问黏附分子-1的表达强度呈正相关（r=0．875，P〈0．01）．且核因子-κ的表达与排斥反应指数也具有明显的正相关性（r=0．829,P〈0．01）。结论：核因子-κB可能通过调控细胞间黏附分子-1等基因的表达．参与角膜移植排斥反应的发生，在角膜移植免疫中起着中心调控者的作用。而免疫抑制剂CsA通过减弱核因子-κB核转位和发挥活性，抑制排斥反应。     

局部亚低温对脑出血后血清细胞间粘附分子-1和白细胞介素-1β的影响

目的研究局部亚低温治疗对脑出血惠者血清细胞间粘附分子-1（ICAM-1）和白细胞介素-1β（IL-1β）的影响。方法随机将70例脑出血患者分为局部亚低温组（35例）和常规治疗组（35例），同时设健康对照组19例；常规治疗组应用药物治疗，局部亚低温组在药物治疗基础上加用局部亚低温治疗，观察两组患者发病第1、3、7天血清ICAM-1和IL-1β水平的变化。结果两组患者发病第1天血清ICAM-1和IL-1β水平均高于健康对照组（P〈0．01）；第3天常规治疗组ICAM-1和IL-1β水平达高峰，局部亚低温组下降，明显低于常规治疗组（P〈0．05）；在发病第7天，局部亚低温组血清ICAM-1和IL-1β仍明显低于常规治疗组（P〈0．05）。结论颅脑局部亚低温治疗可显著降低脑出血后患者血清ICAM-1和IL-1β的浓度，减轻脑出血后的炎症反应，发挥其脑保护作用。     

核因子-κB对糖尿病大鼠肾组织单核细胞趋化蛋白-1与细胞间黏附分子-1表达的影响

目的：探讨核因子-κB（NF．κB）对糖尿病大鼠肾组织单核细胞趋化蛋白-1（MCP-1）、细胞间黏附分子-1（ICAM-1）表达的影响，以及抑制其表达对肾脏的保护作用。方法：30只雄性Wistar大鼠随机分为正常对照组（NC组）、糖尿病模型组（DM组）、NF-κB抑制剂吡咯烷二硫基甲酸酯干预组（DP组），用链脲佐茵素诱导糖尿病大鼠模型。于8周末检测血糖、糖化血红蛋白、肾重指数及尿白蛋白排泄率。应用免疫组织化学染色技术检测肾组织NF-κB、MCP-1以及ICAM-1的表达。结果：（1）与NC组相比，DM组大鼠肾重指数、尿白蛋白排泄率显著增高。DP组也有增高但显著低于DM组（均P〈0.01）；（2）DM组大鼠肾组织NF-κB、MCP-1以及ICAM-1的表达显著高于NC组，DP组的表达显著低于DM组而高于NC组（均P〈0．01）；（3）NF．κB的表达与MCP-1、ICAM-1、尿白蛋白排泄率、肾重指数呈明显正相关（r=0．885，P〈0，01；r=0．861，P〈0．01；r=0．796。P〈0．01；r=0．457。P〈0．01）。结论：糖尿病大鼠肾组织中NF-κB表达明显增加，抑制其活性可减少MCP-1、ICAM-1的表达，减轻单核／巨噬细胞的浸润。延缓糖尿病肾病的发展。     

Effect of beta 2-adrenergic receptor stimulation on interleukin-18-induced intercellular adhesion molecule-1 expression and cytokine production

beta-Adrenergic receptor (AR) agonists have been demonstrated to modulate the production of inflammatory mediators. Recent studies implied that beta 2-AR agonists might be useful for chronic inflammatory diseases caused by interleukin (IL)-18. In the present study, we found that norepinephrine, epinephrine, or isoproterenol down-regulated IL-18 (100 ng/ml)-induced intercellular adhesion molecule (ICAM)-1 expression on monocytes in a dose-dependent manner (10(-8)-10(-4) M), but did not effect B7.1 and B7.2 expression after 24-h incubation. The modulatory effect of these catecholamines on ICAM-1 expression was antagonized by beta 2-AR antagonist, but not by alpha 1-, alpha 2-, or beta 1-AR antagonist. beta 2-AR-selective agonists salbutanol and terbutaline down-regulated IL-18-induced ICAM-1 expression on monocytes, but alpha 1-, alpha 2-, or beta1-AR agonist had no effect. In the same manner, salbutanol and terbutaline as well as norepinephrine, epinephrine, and isoproterenol regulated the IL-18-induced cytokine production, including IL-12, tumor necrosis factor-alpha or interferon-gamma through the stimulation of beta 2-AR. Together with the previous finding that ICAM-1/lymphocyte function-associated antigen-1 interaction plays a crucial role in the IL-18-initiated cytokine network, the present study strongly suggested that the stimulation of beta 2-AR inhibited the IL-18-activated cytokine cascade through the inhibitory effect on ICAM-1 expression, contributing to finding a new method for clinical treatment.     

Improved resuscitation minimizes respiratory dysfunction and blunts interleukin-6 and nuclear factor-kappa B activation after traumatic hemorrhage

OBJECTIVE: We hypothesized that modifying resuscitation would alter hemorrhagic shock-induced respiratory dysfunction and correlate with nuclear factor-kappa B and cytokine expression. DESIGN: Randomized, controlled, prospective study. SETTING: University hospital trauma research laboratory. SUBJECTS: Female, Swiss Webster mice, 8-12 wks old. INTERVENTIONS: Hemorrhagic shock was induced by removing 0.025 mL of blood/g of body weight via a carotid catheter. Animals were resuscitated 30 mins later. Mice were randomized into four groups: group I was cannulated but not bled (sham); group II received normal saline to three times their shed blood volume; group III received their shed blood; and group IV received shed blood + normal saline at two times shed blood volume. MEASUREMENTS AND MAIN RESULTS: We measured the following: serum lactates at the end of shock and after resuscitation, pulmonary function before any instrumentation and after 24 hrs, cytokine concentrations by enzyme-linked immunosorbent assay, and nuclear factor-kappa B activity by electrophoretic mobility shift assay. Groups that were hemorrhaged had significant hypotension and a significant increase in serum lactates over 30 mins. Resuscitation returned the blood pressure to baseline in all groups, and lactates improved in all groups except group II. Group II also demonstrated a significant decrease in pulmonary function characterized by increased airway resistance and decreases in minute volume, lung compliance, and alveolar function. Bronchoalveolar fluid and serum interleukin-6 and whole lung nuclear factor-kappa B activity also were elevated significantly in group II. CONCLUSIONS: Group II demonstrated the least improvement in serum lactate after resuscitation, the most significant acute lung injury, and the greatest interleukin-6 and nuclear factor-kappa B response. Group IV mice had the least acute lung injury, with no detectable interleukin-6 response. Improved resuscitation with crystalloid and shed blood minimized acute lung injury. The reduction in pulmonary dysfunction after improved resuscitation may be attributable to a blunting of the nuclear factor-kappa B and interleukin-6 responses to hemorrhage.     

糖皮质激素对哮喘大鼠气道上皮细胞NF-κB、ICAM-1表达的影响

目的探讨糖皮质激素（布地奈德混悬液）对核因子-κB（NF-κB）、细胞间粘附分子-1（ICAM-1）在哮喘大鼠气道上皮细胞表达的影响。方法将30只大鼠随机分为对照组、哮喘组、布地奈德治疗组，应用免疫组化技术结合计算机病理图像分析系统测定大鼠气道上皮胶原的沉积和气道上皮细胞NF—κB、ICAM-1的相对含量。结果哮喘组NF—κB、ICAM-1的表达水平、气道上皮胶原的沉积明显高于对照组及布地奈德治疗组（均P〈0．01），气道上皮细胞NF—κB与ICAM-1表达呈正相关（r-0．61，P〈0．01），ICAM的表达水平与气道上皮胶原含量呈正相关（r=0．47，P〈0．01）。结论NK-κB、ICMA-1在哮喘气道重构的发生机制中发挥重要作用，早期应用布地奈德可能通过下调NF-κB、ICAM-1的表达，干预气道重构。