Targeting Janus Kinase 3 in Mast Cells Prevents Immediate Hypersensitivity Reactions and Anaphylaxis*

Targeting Janus Kinase 3 in Mast Cells Prevents Immediate Hypersensitivity Reactions and Anaphylaxis*
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靶向肥大细胞中的 Janus 激酶 3 可预防立即超敏反应和过敏反应*

DOI:
--
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发表时间:
1999
影响因子:
4.8
通讯作者:
F. Uckun
F. Uckun
中科院分区:
生物学2区
文献类型:
--
作者:
R. Malaviya;D. Zhu;I. Dibirdik;F. Uckun

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Janus激酶3(JAK 3)是Janus家族蛋白酪氨酸激酶的一员,在肥大细胞中表达,其酶活性可通过IgE受体/FcεRI交联而增强。用4-(4′-羟基苯基)-氨基-6,7-二甲氧基喹唑啉(WHI-P131)选择性抑制肥大细胞中的JAK 3可阻断lgE受体/FcεRI交联后的磷脂酶C激活、钙动员和微管相关蛋白激酶的激活。用WHI-P131处理IgE致敏的啮齿动物以及人肥大细胞有效地抑制了活化相关的形态学变化、脱粒和特异性抗原激发后的促炎介质释放,而不影响远端分泌机制的功能完整性。JAK 3抑制剂WHI-P131的体内给药在无毒剂量水平下防止小鼠中肥大细胞脱粒和皮肤以及全身致死性过敏反应的发展。因此,JAK 3在IgE受体/Fcε RI介导的肥大细胞应答中起着关键作用,用特异性抑制剂如WHI-P131靶向JAK 3可能为肥大细胞介导的过敏反应的新的有效治疗和预防方案提供基础。
Janus kinase 3 (JAK3), a member of the Janus family protein-tyrosine kinases, is expressed in mast cells, and its enzymatic activity is enhanced by IgE receptor/FcεRI cross-linking. Selective inhibition of JAK3 in mast cells with 4-(4′-hydroxylphenyl)-amino-6,7-dimethoxyquinazoline) (WHI-P131) blocked the phospholipase C activation, calcium mobilization, and activation of microtubule-associated protein kinase after lgE receptor/FcεRI cross-linking. Treatment of IgE-sensitized rodent as well as human mast cells with WHI-P131 effectively inhibited the activation-associated morphological changes, degranulation, and proinflammatory mediator release after specific antigen challenge without affecting the functional integrity of the distal secretory machinery. In vivo administration of the JAK3 inhibitor WHI-P131 prevented mast cell degranulation and development of cutaneous as well as systemic fatal anaphylaxis in mice at nontoxic dose levels. Thus, JAK3 plays a pivotal role in IgE receptor/FcεRI-mediated mast cell responses, and targeting JAK3 with a specific inhibitor, such as WHI-P131, may provide the basis for new and effective treatment as well as prevention programs for mast cell-mediated allergic reactions.
巨噬细胞对速发型超敏反应的贡献。
DOI: --
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