Novel human neutrophil agonistic properties of arsenic trioxide: involvement of p38 mitogen-activated protein kinase and/or c-jun NH2-terminal MAPK but not extracellular signal-regulated kinases-1/2

被引:26
作者
Binet, Francois [1 ]
Girard, Denis [1 ]
机构
[1] Univ Quebec, Inst Armand Frappier, INRS, Laval, PQ H7V 1B7, Canada
基金
加拿大健康研究院;
关键词
drug; inflammation; signalization;
D O I
10.1189/jlb.0708421
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Arsenic trioxide (ATO) is known for treating acute promyelocytic leukemia and for inducing apoptosis and mitogen-activated protein kinases (MAPKs) in promyelocytes and cancer cells. We recently reported that ATO induces neutrophil apoptosis. The aim of this study was to establish whether or not ATO recruits MAPKs in neutrophils, as well as to further investigate its agonistic properties. We found that ATO activates p38 and that, unlike H2O2, this response was not inhibited by exogenous catalase. Also, we demonstrated that ATO-induced p38 activation occurs before H2O2 generation and without a calcium burst. We next established that ATO recruits c-jun NH2-terminal (JNK) but not extracellular signal-regulated kinase 1 and 2 (Erk-1/2). Using pharmacological inhibitors, we found that the proapoptotic activity of ATO occurs by a MAPK-independent mechanism. In contrast, the ability of ATO to enhance adhesion, migration, phagocytosis, release, and activity of gelatinase and degranulation of secretory, specific, and gelatinase, but not azurophilic granules, is dependent upon activation of p38 and/or JNK. This is the first study establishing that ATO possesses important agonistic properties in human neutrophils. Given the central role of neutrophils in various inflammatory disorders, we propose that ATO might have broader therapeutic implications in clinics, especially for regulating inflammation. J. Leukoc. Biol. 84: 1613-1622; 2008.
引用
收藏
页码:1613 / 1622
页数:10
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