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
中科院分区:
文献类型:
--
作者:
Berthold T;Schubert N;Muschter S;Rohr M;Wesche J;Reil A;Bakchoul T;Greinacher A
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.
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DOI:
--
发表时间:
1976
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
G. Feinstein;C. Malemud;A. Janoff
通讯作者:
A. Janoff
影响因子:
2.9
作者:
Berthold T;Muschter S;Schubert N;Wesche J;Ameling S;Teumer A;Reil A;Bakchoul T;Greinacher A
通讯作者:
Greinacher A
影响因子:
2.7
作者:
Keller-Stanislawski, B.;Reil, A.;Funk, M. B.
通讯作者:
Funk, M. B.
影响因子:
2.9
作者:
Flesch, Brigitte K.;Wesche, Jan;Bux, Juergen
通讯作者:
Bux, Juergen
影响因子:
--
作者:
B. Flesch;E. Petershofen;J. Bux
通讯作者:
J. Bux