HNA antibody‐mediated neutrophil aggregation is dependent on serine protease activity

HNA antibody‐mediated neutrophil aggregation is dependent on serine protease activity
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HNA 抗体介导的中性粒细胞聚集依赖于丝氨酸蛋白酶活性

DOI:
10.1111/vox.12292
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发表时间:
2015
期刊:
影响因子:
2.7
通讯作者:
Greinacher A
Greinacher A
中科院分区:
医学4区
文献类型:
--
作者:
Berthold T;Schubert N;Muschter S;Rohr M;Wesche J;Reil A;Bakchoul T;Greinacher A

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背景和目的输血相关急性肺损伤 (TRALI) 通常由抗人中性粒细胞同种抗原 2 (HNA-2) 和 HNA-3a 的抗体引起。中性粒细胞聚集被认为是 TRALI 的主要原因,但人们对 HNA 抗体如何启动这一过程知之甚少。我们探索了 HNA-2 和 HNA-3a 抗体诱导中性粒细胞聚集的机制。材料和方法用针对不同细胞功能或蛋白酶的广谱或特异性抑制剂预处理分离的中性粒细胞。使用连续稀释的抗 HNA-2 和抗 HNA-3a 血浆或对照血浆进行粒细胞凝集试验 (GAT),并通过显微镜评估反应性。使用基于光泽精的化学发光测定法研究中性粒细胞中活性氧 (ROS) 的产生。 结果甲醛、碘乙酰胺和丝氨酸蛋白酶抑制剂 Pefabloc-SC、N-对甲苯磺酰基-L-苯丙氨酸氯甲基酮 (TPCK) 和 Nα-甲苯磺酰基-L-赖氨酸预处理可抑制 HNA-2 和 HNA-3a 抗体介导的中性粒细胞聚集氯甲基酮盐酸盐(TLCK)。相反,抑制肌动蛋白聚合、呼吸爆发、半胱氨酸蛋白酶、金属蛋白酶或天冬氨酸蛋白酶不影响中性粒细胞聚集。此外,HNA-3a抗体并不直接引起中性粒细胞中ROS的产生。结论HNA-2和HNA-3a抗体诱导的中性粒细胞聚集是一个主动过程,依赖于胰蛋白酶或胰凝乳蛋白酶样丝氨酸蛋白酶,但不依赖于ROS的产生。这些发现可能为中性粒细胞相关急性肺损伤的药物预防开辟新的前景。
Background and ObjectivesTransfusion‐related acute lung injury (TRALI) is often caused by antibodies against human neutrophil alloantigen‐2 (HNA‐2) and HNA‐3a. Neutrophil aggregation is considered as a major cause of TRALI, but little is known about how HNA antibodies initiate this process. We explored mechanisms involved in neutrophil aggregation induced by HNA‐2 and HNA‐3a antibodies.Materials and MethodsIsolated neutrophils were pretreated with broad‐spectrum or specific inhibitors against different cell functions or proteases. Granulocyte agglutination test (GAT) was performed with serially diluted anti‐HNA‐2 and anti‐HNA‐3a plasmas or control plasma, and reactivity was evaluated microscopically. Reactive oxygen species (ROS) production in neutrophils was investigated using a lucigenin‐based chemiluminescence assay.ResultsHNA‐2 and HNA‐3a antibody‐mediated neutrophil aggregation was inhibited by pretreatment with formaldehyde, iodoacetamide and the serine protease inhibitors Pefabloc‐SC, N‐p‐tosyl‐L‐phenylalanine chloromethyl ketone (TPCK) and Nα‐tosyl‐L‐lysine chloromethyl ketone hydrochloride (TLCK). In contrast, inhibition of actin polymerization, respiratory burst, cysteine proteases, metalloproteases or aspartic proteases did not affect neutrophil aggregation. Furthermore, HNA‐3a antibodies did not directly cause ROS production in neutrophils.ConclusionAggregation of neutrophils induced by HNA‐2 and HNA‐3a antibodies is an active process and depends on trypsin‐ or chymotrypsin‐like serine proteases but is not dependent on the production of ROS. These findings may open new prospects for the pharmacologic prevention of neutrophil‐associated acute lung injury.
弹性蛋白和糜抑素对人白细胞弹性蛋白酶和胰凝乳蛋白酶样蛋白酶的抑制作用。
DOI: --
发表时间: 1976
期刊: Biochimica et Biophysica Acta
影响因子: --
作者:
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通讯作者: A. Janoff
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DOI: 10.1111/trf.12898
发表时间: 2014
期刊: Transfusion
影响因子: 2.9
作者:
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DOI: 10.1111/j.1423-0410.2009.01232.x
发表时间: 2010-01-01
期刊: VOX SANGUINIS
影响因子: 2.7
作者:
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DOI: 10.1111/trf.12160
发表时间: 2013-12-01
期刊: TRANSFUSION
影响因子: 2.9
作者:
Flesch, Brigitte K.;Wesche, Jan;Bux, Juergen
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DOI: --
发表时间: 2011
期刊: Tissue Antigens
影响因子: --
作者:
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