Plasmin immunization preferentially induces potentially prothrombotic IgG anticardiolipin antibodies in MRL/MpJ mice.

Plasmin immunization preferentially induces potentially prothrombotic IgG anticardiolipin antibodies in MRL/MpJ mice.
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纤溶酶免疫优先在 MRL/MpJ 小鼠中诱导潜在的促血栓形成 IgG 抗心磷脂抗体。

DOI:
10.1002/art.24818
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发表时间:
2009
影响因子:
--
通讯作者:
Chen,PojenP
Chen,PojenP
中科院分区:
--
文献类型:
--
作者:
Ede,Kaleo;Hwang,Kwan-Ki;Wu,Chen-Ching;Wu,Meifang;Yang,Yao-Hsu;Lin,Wei-Shiang;Chien,Daniel;Chen,Pei-Chih;Tsao,BettyP;McCurdy,DeborahK;Chen,PojenP

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目的检验假设,利用2个实验小鼠模型,即纤溶酶是一个重要的自身抗原,驱动某些IgG抗心磷脂(ACL)抗体的生产与antiphospholipid syndrome.MethodsBALB/cJ和MRL/MpJ小鼠免疫与弗氏完全佐剂在存在或不存在的人纤溶酶。分析小鼠血清中IgG抗纤溶酶、IgG aCL和IgG抗β2-糖蛋白I(抗β2GPI)抗体的产生。结果纤溶酶免疫的BALB/cJ小鼠仅产生高滴度的抗纤溶酶IgG,而纤溶酶免疫的MRL/MpJ小鼠产生高滴度的抗纤溶酶IgG、抗β 2 GPI IgG和抗aCL IgG。单独用佐剂免疫的两种小鼠品系均未产生IgG抗纤溶酶或IgG aCL。所有10种IgG mAb均与人纤溶酶和心磷脂结合,而4/10与β2GPI结合,3/10与凝血酶结合,4/10与活化的凝血因子X(FXa)结合。在功能上,10个IgG mAb中的4个抑制纤溶酶活性,10个IgG mAb中的1个阻碍抗凝血酶III对凝血酶的失活,10个IgG mAb中的2个抑制抗凝血酶III对FXa的失活。结论纤溶酶免疫导致MRL/MpJ小鼠产生IgG抗纤溶酶、aCL和抗β2GPI,但导致BALB/cJ小鼠仅产生IgG抗纤溶酶。由纤溶酶免疫的MRL/MpJ小鼠产生的IgG mAb与各种抗原结合,并在体外显示出促凝血活性。这些结果表明,纤溶酶可能驱动潜在的血栓前ACL的遗传易感个体。
ObjectiveTo test the hypothesis, utilizing 2 experimental mouse models, that plasmin is an important autoantigen that drives the production of certain IgG anticardiolipin (aCL) antibodies in patients with the antiphospholipid syndrome.MethodsBALB/cJ and MRL/MpJ mice were immunized with Freund's complete adjuvant in the presence or absence of human plasmin. The mouse sera were analyzed for production of IgG antiplasmin, IgG aCL, and IgG anti–β2‐glycoprotein I (anti‐β2GPI) antibodies. IgG monoclonal antibodies (mAb) were generated from the plasmin‐immunized MRL/MpJ mice with high titers of aCL, and these 10 mAb were studied for their binding properties and functional activity in vitro.ResultsPlasmin‐immunized BALB/cJ mice produced high titers of IgG antiplasmin only, while plasmin‐immunized MRL/MpJ mice produced high titers of IgG antiplasmin, IgG aCL, and IgG anti‐β2GPI. Both strains of mice immunized with the adjuvant alone did not develop IgG antiplasmin or IgG aCL. All 10 of the IgG mAb bound to human plasmin and cardiolipin, while 4 of 10 bound to β2GPI, 3 of 10 bound to thrombin, and 4 of 10 bound to the activated coagulation factor X (FXa). Functionally, 4 of the 10 IgG mAb inhibited plasmin activity, 1 of 10 hindered inactivation of thrombin by antithrombin III, and 2 of 10 inhibited inactivation of FXa by antithrombin III.ConclusionPlasmin immunization leads to production of IgG antiplasmin, aCL, and anti‐β2GPI in MRL/MpJ mice, but leads to production of only IgG antiplasmin in BALB/cJ mice. IgG mAb generated from plasmin‐immunized MRL/MpJ mice bind to various antigens and exhibit procoagulant activity in vitro. These results suggest that plasmin may drive potentially prothrombotic aCL in genetically susceptible individuals.
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DOI: --
发表时间: 1996
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