单核细胞趋化蛋白1与神经干细胞的体外迁移

背景：研究表明趋化因子基质细胞衍生因子1及血管内皮生长因子参与神经干细胞的迁移。 目的：观察趋化因子单核细胞趋化蛋白1及其受体CCR2对神经干细胞体外迁移的作用。 方法：分离培养胎鼠海马组织神经干细胞,体外传代扩增及鉴定;通过细胞免疫荧光及RT-PCR检测其受体CCR2表达情况;通过琼脂糖下细胞迁移实验观察50,100,200,300,500 μg/L 单核细胞趋化蛋白1对神经干细胞的体外趋化作用。 结果与结论：细胞免疫荧光及RT-PCR检测证实胎鼠海马来源神经干细胞表达趋化因子受体CCR2;琼脂糖下细胞迁移实验显示,体外条件下单核细胞趋化蛋白1可趋化神经干细胞迁移,且趋化迁移作用随质量浓度增加而增强,抗CCR2多克隆抗体可对抗其趋化迁移作用。     

霉酚酸酯对高糖培养下人肾小球系膜细胞MCP-1和FN表达的影响

目的:探讨高糖以及霉酚酸酯(MMF)对人肾小球系膜细胞(HMCs)单核细胞趋化蛋白-1(MCP-1)和纤维连接蛋白(FN)表达的影响。方法:将培养的HMCs分为正常对照组(5 mmol/L葡萄糖);高糖组(30 mmol/L葡萄糖);甘露醇渗透压对照组(5 mmol/L葡萄糖+25 mmol/L甘露醇);高糖+MMF-10组(30 mmol/L葡萄糖+10μg/mL MMF);高糖+MMF-100组(30 mmol/L葡萄糖+100μg/mL MMF),采用RT-PCR检测每组不同时间点(24、48、72 h)MCP-1 mRNA的表达,ELISA法检测培养上清液MCP-1及FN蛋白的表达。结果:高糖组HMCs MCP-1 mRNA、蛋白的表达及FN的分泌较正常对照组显著增加(P<0.01),且48 h表达最高;不同浓度的MMF均能下调MCP-1 mRNA、蛋白及FN的表达(P<0.01);不同浓度的MMF对MCP-1 mRNA、蛋白的表达及FN分泌的抑制程度不同,呈时间剂量依赖性(P<0.05)。结论:MMF可以阻抑MCP-1的表达及FN的分泌,可能对延缓肾小球硬化及间质纤维化有一定作用。     

PDTC对高糖培养大鼠肾成纤维细胞中MCP-1表达的影响

目的:探讨核因子-κB(NF-κB)抑制剂吡咯烷二硫氨基甲酸(PDTC)对高糖培养大鼠肾成纤维细胞(NRK)中单核细胞趋化蛋白-1(MCP-1)表达的影响。方法:将NRK分4组进行体外培养:(1)正常组:5.6mmol/L的葡萄糖;(2)高糖组:30mmol/L葡萄糖;(3)高糖+PDTC1组:30mmo/L葡萄糖+5μmol/LPDTC;(4)高糖+PDTC2组:30mmo/L葡萄糖+10μmol/LPDTC,分别于培养24h、48h取各组NRK采用RT-PCR检测其MCP-1mRNA表达水平,采用WesternBlot检测MCP-1蛋白表达水平。结果:与正常组相比,高糖组MCP-1mRNA和蛋白表达水平显著升高(P<0.05),不同浓度PDTC干预后,MCP-1mRNA和蛋白表达水平显著下降(P<0.05),且随PDTC浓度增大,下降更明显。结论:高糖可使NRK中MCP-1表达增高,PDTC能抑制NRK中MCP-1表达。     

腺病毒介导MCP-1-siRNA对人单核细胞体外迁移能力的影响

目的 构建针对单核细胞趋化蛋白1(monoeyte chemoattractant protein 1,MCP-1)基因的小分子干扰RNA(siRNA)重组腺病毒,探讨干扰MCP-1表达对人单核细胞白血病株THP-1迁移能力的影响.方法 设计并合成针对人MCP-1的siRNA的靶DNA序列,克隆于穿梭载体pAdTrack-CMV中,与带有腺病毒骨架质粒pAdeasy-1的BJ5183细菌中进行同源重组,获得重组腺病毒载体pAdeasy-si-MCP-1,转染人胚肾细胞株293细胞,包装并扩增病毒颗粒.体外感染能表达MCP-1的293细胞,RT-PCR检测siRNA对MCP-1转录水平影响.Millicell细胞迁移实验检测对人单核细胞白血病株THP-1体外迁移能力的影响.结果 高糖诱导下,人293细胞MCP-1的表达增强;而Ad-si-MCP-1感染后,能够显著抑制高糖刺激的MCP-1 mR-NA水平的升高;Ad-si-MCP-1感染293细胞后的培养上清对THP-1的趋化作用较高糖刺激组及其siRNA阴性对照组显著降低.结论 成功构建了抑制MCP-1表达的siRNA腺病毒载体,其抑制MCP-1表达可明显抑制高糖诱导的THP-1的趋化作用,提示MCP-1表达的干预可能为糖尿病肾病等MCP-1相关疾病提供新的预防和治疗手段.     

联胺对内皮细胞表达巨噬细胞炎性蛋白-1α的影响

目的观察联胺能否诱导培养的人脐静脉内皮细胞表达和分泌巨噬细胞炎性蛋白-1α (MIP-1α)及其意义.方法使内皮细胞暴露于不同浓度联胺4 h,以核酸酶S1保护分析法检测内皮细胞内MIP-1α mRNA,以细胞酶联免疫吸附实验测定内皮细胞的MIP-1α蛋白表达.同时收集内皮细胞条件培养基,用Boyden小室微孔滤膜法检测MIP-1α对外周血单核细胞的趋化活性.结果内皮细胞MIP-1α mRNA在5 μmol/L联胺组的表达是对照组的3.4倍, 差异具有显著性(t=8.70, P<0.05).1、5、10 μmol/L联胺组MIP-1α蛋白的表达分别是对照组的1.9倍、2.2倍、1.7倍,方差分析显示有统计学意义(F=35.65, P<0.05).趋化实验显示,5 μmol/L联胺组内皮细胞的条件培养基引起单核细胞的迁移距离[(99.50±4.31) μm]显著高于无联胺组[(66.47±3.25) μm]、化学促动组[(67.03±6.83) μm]和随机移动组[(65.40±3.36) μm,F=404.31, P<0.05],提示经联胺刺激的条件培养基内含有具趋化活性的物质.加入山羊抗人MIP-1α多克隆抗体后,联胺组条件培养基所致的单核细胞迁移距离降至(82.80±6.88) μm(F=192.25, P<0.05),说明经联胺刺激的条件培养基内含有具趋化活性的MIP-1α.结论脂质过氧化诱导剂联胺可促进内皮细胞产生高水平具趋化活性的MIP-1α, 并可能通过招引外周血单核细胞迁入动脉内膜, 而在动脉粥样硬化过程中发挥重要作用.     

OxLDL直接诱导人外周血单核细胞表达致炎细胞因子mRNA

目的 :探讨OxLDL在动脉粥样硬化血管局部免疫病理损伤中的作用机制。方法 :采用地高辛标记的寡核苷酸探针原位杂交技术 ,观察OxLDL对人外周血单核细胞MCP 1、PDGF、bFGF、IL 10 4种致炎细胞因子mRNA表达的影响。结果 :OxLDL(10～ 30mg L)同人外周血单核细胞孵育 2 4小时后能够以剂量依赖性方式显著提高MCP 1、bFGF、PDGF、IL 10 4种致炎细胞因子mRNA表达 (均P <0 0 0 1)。结论 :OxLDL能以剂量依赖性方式直接刺激人外周血单核细胞分泌致炎细胞因子mRNA。     

原代分离的大鼠胰岛细胞对葡萄糖刺激胰岛素分泌的反应性研究

目的:研究原代分离的大鼠胰岛对葡萄糖刺激的胰岛素分泌反应性。方法:胶原酶原位灌注法分离大鼠胰岛,在含0.5%BSA、5.5或11.1mmol/L葡萄糖的培养基中培养不同时间后,用含0.2%BSA、3.3mmol/L葡萄糖的KRB缓冲液预培养胰岛30min,分别换入含不同浓度葡萄糖KRB缓冲液,培养1h,收集上清,RIA法测定胰岛素浓度。结果:大鼠胰岛过夜培养后,在基础(3.3mmol/L)和高浓度(16.7mmol/L)葡萄糖条件下胰岛素分泌量分别为(12.4±3.2)和(45.2±4.2)μU/ml/10islets/h;5.5mmol/L和11.1mmol/L葡萄糖浓度下培养12h和20h后,胰岛对葡萄糖的反应性均明显高于16.7mmol/L和22.5mmol/L葡萄糖组(P<0.05);体外培养5d后,对高糖的反应性为(4.28±0.67)倍。结论:原代分离的大鼠胰岛可在(1～5)d内保持对葡萄糖的反应性。     

高糖预处理影响单核细胞对热灭活金黄色葡萄球菌刺激的反应

目的 观察高糖状态下热灭活金黄色葡萄球菌(HKSA)诱导的人单核细胞株THP-1凋亡特点,以及表达诱导型一氧化氮合酶(iNOS)、白细胞介素(IL)-1β mRNA和IL-1β蛋白分泌规律.方法 体外培养THP-1单核细胞,分别以5.5 mmol/L葡萄糖(LG)和25.0 mmol/L葡萄糖(HG)培养12h～8d.将HG和LG培养6d的单核细胞加入HKSA.分别于HKSA加入前和加入后2～48 h提取单核细胞,检测细胞凋亡、IL-1β蛋白、iNOS和IL-1β mRNA表达.细胞凋亡采用Annexin V与PI双染法,流式细胞技术检测;IL-1β蛋白分泌采用ELISA法检测;提取细胞总RNA,反转录生成cDNA后采用实时定量逆转录聚合酶链反应(real-time quantitative PCR)法,检测iNOS和IL-1β mRNA表达情况.结果 (1)高糖刺激THP-1单核细胞12 ～48 h后IL-1β蛋白、iNOS和IL-1β mRNA表达较刺激前显著增加(P＜0.05),iNOS和IL-1β mRNA表达在24 h达最高值,IL-1β蛋白分泌48 h达高峰.细胞凋亡在高糖刺激48 h～4 d较刺激前显著增加(P＜0.05).(2)两组细胞加入HKSA后6～48 h表达iNOS和L-1β显著高于刺激前(P＜0.01),24h达高峰,48 h表达下降;IL-1β蛋白分泌在48 h达最高值.两组细胞凋亡率在加入HKSA后12h、24h、48 h逐渐增加(P＜0.01).单核细胞加入HKSA前和加入HKSA后12h,高糖组与低糖组比较,高糖组IL-1β蛋白、iNOS和IL-1β mRNA表达均低于低糖组,凋亡率高于低糖组(P＜0.05).结论 高糖和HKSA对单核细胞分泌IL-1β蛋白、表达iNOS和IL-1β mRNA的影响与刺激时间有关;单核细胞处于持续高糖状态时,高糖可以增加细胞凋亡率,降低IL-1β蛋白分泌、iNOS和IL-1β表达.     

二十碳五烯酸抑制早期糖尿病肾病单核细胞趋化蛋白-1的表达

目的:观察二十碳五烯酸(EPA)对早期阶段的糖尿病肾病单核细胞趋化蛋白-1(MCP-1)表达的影响。方法:体内实验中,KKAy/Ta小鼠随机分为2组:治疗组予以EPA1g·kg-1.d-1腹腔内注射共8周,对照组同步予以生理盐水注射,应用免疫组化和实时RT-PCR检测肾脏中MCP-1表达及巨噬细胞浸润的变化。应用ELISA方法检测高糖和EPA刺激后的人脐静脉内皮细胞(HUVECs)上清MCP-1的表达。结果:EPA治疗后KKAy/Ta小鼠肾脏MCP-1的蛋白表达及巨噬细胞浸润明显减弱。实时RT-PCR结果显示EPA治疗组小鼠肾皮质MCP-1mRNA的表达明显低于对照组。25mmol/LD-葡萄糖作用72h可引起HUVECs分泌MCP-1明显增加,30μmol/L和50μmol/LEPA均可显著地抑制高糖诱导的MCP-1表达。结论:EPA降低了KKAy/Ta小鼠肾脏及高糖诱导的内皮细胞MCP-1的表达,提示EPA可能抑制早期糖尿病肾病的炎症反应。     

血管紧张素Ⅱ对单核细胞趋化蛋白及基因调节的意义

目的　观察血管紧张素Ⅱ (AⅡ )对人单核细胞株THP 1分泌单核细胞趋化因子 (MCP 1)蛋白及基因的影响。方法　利用ELISA法检测AⅡ作用后THP 1分泌MCP 1的表达 ,利用RT PCR检测其MCP 1的mRNA表达。结果　 4种不同浓度的AⅡ (1× 10 -6、1× 10 -7、1× 10 -8、1× 10 -9mol/L)刺激THP 12 4h后 ,MCP 1蛋白及mRNA的表达明显增加 ,且呈浓度依赖性。结论　AⅡ可调节THP 1细胞MCP 1基因及蛋白的表达 ,AⅡ可通过致炎症作用参与动脉粥样硬化的发病过程     

Acute inflammatory reactions caused by histamine via monocytes/macrophages chronically participate in the initiation and progression of atherosclerosis

Previously we demonstrated that histidine decarboxylase (HDC), which produces histamine from l-histidine, was detected in monocytes/macrophages located in human atherosclerotic lesions. As monocytic migration is a key event of atherogenesis, we investigated whether histamine induces monocytic expression of monocyte chemoattractant protein (MCP)-1 and its receptors CCR2-A and -B, and also endothelial expression of ICAM-1 and VCAM-1. Furthermore, we studied the effect of interleukin (IL)-4, which inhibits the HDC expression, on the expression of MCP-1 and CCR2. Histamine stimulated monocytes, but not macrophages, to express MCP-1 and CCR2-A and -B. The expression of MCP-1 was inhibited by histamine H2 blocker. In contrast, IL-4 enhanced CCR2 expression but not MCP-1. Histamine stimulated endothelial cells to express ICAM-1 and VCAM-1. These results indicate that histamine and IL-4, which are both synthesized in the arterial intima, chronically participates in the pathogenesis of atherosclerosis via the enhanced expression of monocytic MCP-1, CCR2 and endothelial adhesion molecules.     

Induction of monocyte chemoattractant protein-1 (MCP-1) production by Pseudomonas nitrite reductase in human pulmonary type II epithelial-like cells

Monocyte chemoattractant protein-1 (MCP-1), a chemoattractant for monocytes, is presumed to play a pivotal role in the recruitment and accumulation of monocytes in various diseases including pulmonary infections. We examined here whether or not Pseudomonas nitrite reductase (PNR), a recently identified IL-8 inducer in various respiratory cells, could stimulate human pulmonary type II epithelial-like cells (A549) to induce MCP-1 production. A time- and dose-dependent induction of MCP-1 protein synthesis associated with an increase of MCP-1 mRNA expression by A549 cells was observed in response to PNR. New protein translation was not required for PNR-mediated MCP-1 mRNA expression in the same cells. When anti-human MCP-1 monoclonal antibody was used for neutralizing of monocyte chemotactic factor (MCF) activities in the culture supernatants of these cells stimulated with PNR, significant reductions of MCF activities (the mean reduction rate; 49-59%, P<0. 05) were observed. These data suggest that PNR may contribute to monocyte migration, through inducing pulmonary epithelial cell-derived MCP-1 production in the airway of patients with pneumonia due to P. aeruginosa.     

Prevention of myocardial reperfusion injury in rats by an antibody against monocyte chemotactic and activating factor/monocyte chemoattractant protein-1

MCAF (monocyte chemotactic and activating factor)/MCP-1 (monocyte chemoattractant protein-1) is an important mediator of monocyte recruitment to inflammatory sites. However, its pathophysiologic role in myocardial reperfusion injury remains unknown. Male Wistar rats were anesthetized, and the left anterior descending coronary artery was ligated for an hour, after which the ligature was released. Northern blotting analysis revealed that MCAF/MCP-1 mRNA expression increased 16-fold in the reperfused region at 12 hours after reperfusion. MCAF/MCP-1 concentration in plasma and the heart was already elevated after hour of ischemia in this model. Goat polyclonal antibodies were prepared by repeated immunization of animals with purified, recombinant rat MCAF/MCP-1, and the neutralizing activities of this antibody were confirmed by monocyte chemotaxis assay and administration to rats with crescentic glomerulonephritis. Intravenous injection of anti-MCAF/MCP-1 antibody significantly reduced the infarct size at 24 hours after reperfusion compared with the injection of control IgG (33.9 +/- 5.1% vs 49.4 +/- 2.7% of ischemic area, mean +/- SEM). Administration of this antibody markedly decreased the intercellular adhesion molecule-1 mRNA expression and infiltration of macrophages, which suggested the pathophysiologic role of MCAF/MCP-1. Neutralization of MCAF/MCP-1 is beneficial by preventing reperfusion injury in a rat model of myocardial ischemia and reperfusion.     

IL-17对心肌细胞单核细胞趋化蛋白-1表达的影响

目的:研究IL-17对原代培养心肌细胞中单核细胞趋化蛋白-1(MCP-1)表达的影响。方法:差速贴壁法分离乳鼠心肌细胞进行原代培养,采用逆转录聚合酶链反应(RT-PCR)检测心肌细胞IL-17R和MCP-1基因表达情况,并采用酶联免疫吸附法(ELISA)检测心肌细胞培养上清中MCP-1蛋白的表达。结果:心肌细胞存在IL-17R的基因表达。IL-17呈浓度依赖式上调心肌细胞MCP-1基因和蛋白的表达水平,与不加刺激因子的对照组相比差异有统计学意义(P<0.05)。心肌细胞MCP-1 mRNA的表达量在IL-17作用4 h时达到高峰,随后开始下降,而IL-17作用下心肌细胞MCP-1蛋白的表达呈时间依赖式升高,与对照组相比有显著性差异(P<0.05)。结论:心肌细胞表达IL-17R。IL-17可上调心肌细胞MCP-1的表达,其作用与IL-17的浓度和作用时间有关。     

GM-CSF activates RhoA, integrin and MMP expression in human monocytic cells

Monocyte migration is one of the key events occurring in the early stage of atherosclerosis. This process includes monocytic adhesion to and penetration through the arterial intima. In such an environment, many factors stimulate the monocytes to enhance integrin activation and extracellular matrix degradation. To investigate the coordinative operation of these two events in relation to monocyte migration, we paid particular attention to the effects of granulocyte-macrophage colony-stimulating factor (GM-CSF) on monocytes in terms of RhoA activation and matrix metalloproteinase (MMP) expression. RhoA and integrin clustering were activated by GM-CSF, monocyte chemoattractant protein-1 (MCP-1) and platelet-derived growth factor-BB (PDGF-BB) in human monocytic cell lines. Furthermore, enhancement of migration was observed with stimulation by MCP-1 and PDGF-BB. Granulocyte-macrophage colony-stimulating factor did not enhance the migration, even though it activated RhoA and integrin. However, GM-CSF is known to stimulate monocytes to express MCP-1, suggesting the presence of an indirect mechanism for GM-CSF-mediated migratory activity. In contrast, only GM-CSF enhanced the expression of MMP-1 and MMP-9. These results provide evidence that GM-CSF has multiple functions enhancing monocytic migration via RhoA and integrin activation, and via MMP expression.     

Cyclic mechanical stretch augments both interleukin-8 and monocyte chemotactic protein-3 production in the cultured human uterine cervical fibroblast cells

Intensive local leukocyte infiltration in the uterine cervix is a characteristic feature in the process of cervical ripening. The infiltrated leukocytes include neutrophils, macrophages and monocytes, which are believed to play important roles in cervical ripening by secreting elastase, matrix metalloproteinase and interleukin-1 (IL-1). Interleukin-8 (IL-8) and monocyte chemotactic protein-3 (MCP-3) belong to the CXC and CC chemokine families, and mediate the chemotaxis of neutrophils and monocytes/macrophages respectively. The aim of the present study was to investigate the possible involvement of IL-8 and MCP-3 in leukocyte chemotaxis in cervical ripening. Immunohistochemistry and RT-PCR detected both IL-8 and MCP-3 expression in human pregnant uterine cervices. Labour-like cyclic mechanical stretch for 48 h significantly elevated both IL-8 (555%) and MCP-3 (360%) secretion from cultured human uterine cervical fibroblast (CxF) cells (P<0.05 for both). Cyclic mechanical stretch for 24, 36 and 48 h significantly increased both IL-8 and MCP-3 mRNA expression in CxF cells (P<0.05 for all). The stretch-induced augmentation of both IL-8 and MCP-3 expression was significantly suppressed by an activator protein-1 (AP-1) inhibitor, curcumin. These data suggest that cyclic mechanical stretch of the uterine cervix by the presenting part of the fetus during labour may augment both IL-8 and MCP-3 production in the uterine cervix via AP-1 activation.     

Actinobacillus actinomycetemcomitans serotype b-specific polysaccharide antigen stimulates production of chemotactic factors and inflammatory cytokines by human monocytes.

Serotype b-specific polysaccharide antigen (SPA) was extracted from whole cells of Actinobacillus actinomycetemcomitans Y4 by autoclaving and purified by chromatography on DEAE-Sephadex A-25 and Sephacryl S-300. SPA induced the release of monocyte and leukocyte chemotactic factors by human monocytes. Polymyxin B had almost no effect on the release of monocyte chemotactic factor, but a monoclonal antibody against SPA markedly inhibited it. Human monocytes stimulated with SPA exhibited the increased mRNA expression of monocyte chemoattractant protein 1 (MCP-1) and a neutrophil chemotactic factor, interleukin-8 (IL-8). On the other hand, SPA induced the release of IL-1, IL-6, and tumor necrosis factor (TNF) and enhanced the expression of IL-1alpha, IL-1beta, IL-6, and TNF alpha (TNF-alpha) mRNAs. Human monocytes expressed MCP-1 and IL-8 mRNAs when stimulated by human recombinant IL-1alpha, I1-1beta, IL-6, and TNF-alpha, suggesting that these inflammatory cytokines induced by SPA might participate in the production of chemotactic factors in human monocytes.     

Cultured human monocytes secrete fibronectin in response to activation by proinflammatory cytokines

We studied the effects of the cytokines IL-1alpha, IL-6, tumour necrosis factor-alpha (TNF-alpha), IL-4, IL-10, IL-13 and transforming growth factor-beta (TGF-beta) on fibronectin (FN) production by cultured-human monocytes. IL-1alpha, IL-6 and TNF-alpha all increased FN production, an indicator of monocyte activation. These cytokines increased FN production in a dose-dependent fashion, with a 4-h treatment being sufficient to measure FN production by radioimmunoassay. Conversely, IL-4, IL-10 and IL-13 strongly inhibited cytokine-induced FN production, while TGF-beta only partially inhibited FN production. The combination of suboptimal doses of cytokines (IL-1alpha + IL-6, IL-1alpha + TNF-alpha, IL-6 + TNF-alpha), which could not singly induce substantial amounts of FN, were able to induce FN production by cultured monocytes. Northern blot analysis with a cDNA specific for FN confirmed the expression of FN mRNA in cultured monocytes stimulated with a single cytokine or a combination of cytokines. Our data demonstrate that monocytes may not always require high concentrations of cytokines for activation in vitro, and that the synergistic or additive action of low levels of cytokines on monocyte activation may be sufficient to promote immune or inflammatory reactions. Our data also suggest that certain T cell cytokines may regulate monocyte activation.     

醛固酮对肾小球系膜细胞上血管紧张素Ⅱ受体表达的影响

目的：研究醛固酮(ALD)对高糖状态下大鼠肾小球系膜细胞（RMCs）上血管紧张素Ⅱ1a、1b 和 2 型受体(AT-1aR、 AT-1bR 和 AT-2R)表达的影响及意义。方法:以不同浓度的 ALD (10-8-10-6 mol/L)或 10-7 mol/L 螺内酯(醛固酮受体拮抗剂,SPI)或 10-7 mol/L 氯沙坦（血管紧张素Ⅱ 1 型受体拮抗剂,Los）或10-9 mol/L PD123319(血管紧张素Ⅱ 2 型受体拮抗剂,PD)刺激高糖(30 mmol)状态下培养的 RMCs, MTT 法检测 RMCs 的增殖,半定量 RT-PCR 法检测细胞上 AT-1aR、AT-1bR 和 AT-2R mRNA 的表达,ELISA法检测单核细胞趋化蛋白-1（MCP-1）的表达。结果: ALD(10-8-10-6 mol/ L)刺激高糖状态下 RMCs 12 h 后, AT-1aR、AT-1bR 和 AT-2R mRNA 表达显著上调,分别为高糖对照组的 1.62-1.77倍、9.61-9.89倍、7.26-7.35倍（P<0.01）。 ALD 受体拮抗剂 SPI 能拮抗 ALD 上调 AT-1aR、 AT-1bR 表达的作用;而 AT-2R mRNA 表达轻度增加（P<0.05）。ALD 刺激高糖状态下 RMCs 12 h 后 AT-1aR/AT-1bR 显著下降（P<0.01）,SPI 能拮抗 ALD的这种作用。ALD 刺激高糖状态下RMCs 12 h 后,MCP-1表达增加（P<0.01）,SPI/Los/PD 能拮抗 ALD 的作用。结论: ALD 能通过上调高糖状态下 RMCs 上 AT-1aR、 AT-1bR 和 AT-2R 基因表达, 改变 AT-1R 亚型的比例,诱导 MCP-1 过度表达,参与炎症反应。