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特发性导管中心性胰腺炎患者的小叶间胰管周

摘要:背景:2型自身免疫性胰腺炎(AIP)称为特发性导管中心性胰腺炎(IDCP),其病理特征是粒细胞上皮病变。为阐明该病的发病机制,该试验研究了淋巴浆细胞硬化性胰腺炎(LPSP)(1型AIP)和IDCP的中性粒细胞浸润的可能机制。方法:该研究收集慢性酒精性胰腺炎患者(ACP,N=10),LPSP患者(N=10)和IDCP患者(N=12)行胰腺切除术后的组织,记录病变胰腺导管周围的中性粒细胞数,采用免疫组织化学方法检测中性粒细胞趋化因子-粒细胞趋化蛋白-2(GCP-2)和白细胞介素-8(IL-8)-在病变胰腺导管上皮细胞的表达情况,并将细胞染色强度评分为阴性(0),弱阳性(1),阳性(2)或强阳性(3)4个等级。结果:特发性导管中心性胰腺炎(IDCP)患者小叶间胰管周围的平均中性粒细胞数(15.16;四分位数间距[IQR]:9.74-18.41)明显高于慢性酒精性胰腺炎(ACP)患者(2.66;IQR:1.33-4.33)(P<0.05)和淋巴浆细胞硬化性胰腺炎(LPSP)患者(3.16;IQR:2.74-4.57)(P<0.01);但ACP、LPSP和IDCP患者的小叶内胰管周围的平均中性粒细胞数间的差异无统计学意义(1.16;IQR:0.33-3.41),(3.16;IQR:0.74-5.5)和(3;IQR:1.08-7.91)。IDCP患者小叶间胰管上皮细胞的粒细胞趋化蛋白-2(GCP-2)平均含量(1.5;为0.25-2)明显高于ACP患者(0;IQR:0-0.75)(P<0.05)和LPSP患者(0;IQR:0-0.75)(P<0.05);小叶间胰管上皮细胞中IL-8平均含量在ACP(0;IQR:0-0.75),LPSP(1;IQR:0-1.75)和IDCP(0.5;IQR:0-1)间无显著差异。结论:特发性导管中心性胰腺炎(IDCP)患者的小叶间胰管周围中性粒细胞浸润程度增高,其机制可能与病变部位粒细胞趋化蛋白-2(GCP-2)增加有关。

Abstract:BACKGROUND:Characteristicsoftype2autoimmunepancreatitis(AIP)isgranulocyteepitheliallesions,calledidiopathicduct-centricpancreatitis(IDCP).ToclarifypathogenesisofIDCP,weinvestigatedmechanismofneutrophilinfiltrationintype1AIP,calledlymphoplasmacyticsclerosingpancreatitis(LPSP)andIDCP.METHOD:Thisstudywasperformedonresectedpancreatafrompatientswithalcoholicchronicpancreatitis(ACP,n=10),LPSP(n=10)andIDCP(n=12).Thenumberofneutrophilsaroundthepancreaticductswascounted.Theexpressionofneutrophilschemoattractantsgranulocytechemotacticprotein-2(GCP-2)andinterleukin-8(IL-8)inthepancreaticductepitheliawasexaminedusingimmunohistochemistry.Thecellstainingintensityisscoredasnegative(0),weak(1),moderate(2)orstrong(3).RESULTS:ThemediannumberofneutrophilsaroundtheinterlobularpancreaticductswassignificantlyhigherinIDCP(15.16;interquartilerange[IQR]:9.74-18.41)thaninACP(2.66;IQR:1.33-4.33)(P0.05)andLPSP(3.16;IQR:2.74-4.57)(P0.01).TherewasnosignificantdifferenceinthemediannumberofneutrophilsaroundtheintralobularpancreaticductsamongACP(1.16;IQR:0.33-3.41),LPSP(3.16;IQR:0.74-5.5)andIDCP(3.00;IQR:1.08-7.91).ThemedianscoreofGCP-2intheinterlobularpancreaticductepitheliawassignificantlyhigherinIDCP(1.5;IQR:0.25-2)thaninACP(0;IQR:0-0.75)(P0.05)andLPSP(0;IQR:0-0.75)(P0.05).TherewasnosignificantdifferenceinthemedianscoreofIL-8intheinterlobularpancreaticductepitheliaamongACP(0;IQR:0-0.75),LPSP(1;IQR:0-1.75)andIDCP(0.5;IQR:0-1).CONCLUSIONS:SignificantlyincreasedneutrophilinfiltrationaroundtheinterlobularpancreaticductinIDCPmaydependonGCP-2.

引自:MitsuyamaT1,UchidaK1,SumimotoK1,etal.Comparisonofneutrophilinfiltratiobetweentype1andtype2autoimmunepancreatitis.Pancreatology.Mar17.

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