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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 plateletactivating factor(PAF)and hydrogen peroxide(H2O2)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 H2O2 of different concentrations(103,102,101 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 Pbromophenacylbromide(phospholipase A2 inhibitor),or chlorpromazine (calmodulin antagonist)of EDTA (calcium ino chalet)to test their effects on H2O2 induce PMNGMC adhesion.RESULTS H2O2 stimulated PMN adhesion to GMC with the maximal effect seen at 102 mol/L,which induced a 22fold increase of PMN adhesion as compared with controls.Pretreatment of PMNs with BN52021 had no effect on H2O2 induced PMNGMC adhesion,while pretreatment of GMCs with BN52021 before the addition of H2O2 significantly decreased the adhesion.Pretreatment of GMCs with Pbromophenacylbromide,or chlorpromazine or EDTA also significantly decreased the H2O2 induced GMCPMN adhesionCONCLUSION H2O2 may modulate the adhesion of PMN to mesangial cells,mainly by affecting PAF synthesis and signaling.
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