血小板活化因子介导过氧化氢诱导肾小球系膜细胞-白细胞粘附  被引量:2

PLATELET ACTIVATING FACTOR MEDIATES HYDROGEN PEROXIDE INDUCED GLOMERULAR MESANGIAL CELL AND LEUKOCYTE ADHESION

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作  者:甘卫华[1,2] 姜新猷[1,2] 贾力[1,2] 胡明昌[1,2] 

机构地区:[1]南京医科大学小儿肾脏病研究中心 [2]南京医科大学第二附院儿科

出  处:《肾脏病与透析肾移植杂志》1998年第1期38-42,共5页Chinese Journal of Nephrology,Dialysis & Transplantation

摘  要:目的:研究过氧化氢(H2O2)对肾小球系膜细胞-中性粒细胞(GMC-PMN)粘附的影响及其机制。方法:用体外培养的人肾小球系膜细胞与不同浓度血小板活化因子(PAF)或H2O2作用,并以各类拮抗剂观察其对GMC-PMN粘附的影响。结果:不同浓度H2O2促进GMC依赖性PMN粘附,以10-2mol/L浓度的作用最强,使PMN粘附率增强2.2倍。用PAF受体拮抗剂预处理PMN对粘附无影响。预处理GMC可显著降低粘附率,磷酯酶A2抑制剂对溴基苯酰基溴、钙调蛋白抑制剂氯丙嗪和钙离子螯合剂EGTA预处理GMC,均能降低H2O2引起的GMC-PMN粘附。结论:H2O2可促进GMC与PMN的粘附。H2O2的这一作用可能是通过PAF介导的。BJECTIVE To study the in vitro effects of plateletactivating factor(PAF)and hydrogen peroxide(H2O2)on glomerular mesangial polymorphonuclear cells adhesion and the related mechanisms.METHODOLOGY Cultured human glomerular mesangial cell(GMC) and peripheral polymorphonuclear cell(PMN)were used in this study.The cultured GMCs were treated with H2O2 of different concentrations(103,102,101 mol/L respectively)for 20 minute.Then PMN was added to the medium for another 30 minute.GMC was also pretreated with BN 52021(a PAF receptor antagonist),or Pbromophenacylbromide(phospholipase A2 inhibitor),or chlorpromazine (calmodulin antagonist)of EDTA (calcium ino chalet)to test their effects on H2O2 induce PMNGMC adhesion.RESULTS H2O2 stimulated PMN adhesion to GMC with the maximal effect seen at 102 mol/L,which induced a 22fold increase of PMN adhesion as compared with controls.Pretreatment of PMNs with BN52021 had no effect on H2O2 induced PMNGMC adhesion,while pretreatment of GMCs with BN52021 before the addition of H2O2 significantly decreased the adhesion.Pretreatment of GMCs with Pbromophenacylbromide,or chlorpromazine or EDTA also significantly decreased the H2O2 induced GMCPMN adhesionCONCLUSION H2O2 may modulate the adhesion of PMN to mesangial cells,mainly by affecting PAF synthesis and signaling.

关 键 词:PAF 过氧化氢 白细胞粘附 肾小球疾病 

分 类 号:R692.6[医药卫生—泌尿科学] R362[医药卫生—外科学]

 

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