CRL-1072 enhances antimycobacterial activity of human macrophages through interleukin-8.

CRL-1072 enhances antimycobacterial activity of human macrophages through interleukin-8.
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CRL-1072 通过白细胞介素 8 增强人类巨噬细胞的抗分枝杆菌活性。

DOI:
10.1089/107999099314432
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发表时间:
1999
期刊:
Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research.
影响因子:
--
通讯作者:
HunterJr,RL
HunterJr,RL
中科院分区:
--
文献类型:
--
作者:
Jagannath,C;Pai,S;Actor,JK;HunterJr,RL

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CRL-1072是一种波洛沙姆表面活性剂,在巨噬细胞中比在肉汤培养中更有效地杀死分枝杆菌。用CRL-1072处理的人巨噬细胞以剂量依赖的方式合成白细胞介素-8 (IL-8)、肿瘤坏死因子- α (tnf - α)和粒细胞-巨噬细胞集落刺激因子(GM-CSF)。100-1500 ng poloxamer处理过的人巨噬细胞中,每百万巨噬细胞中积累了约3000 pg IL-8,早在2小时内就诱导了IL-8的mRNA信息。由于巨噬细胞不含IL-RA受体,因此采用transwell培养方法研究了crl1072处理过的人巨噬细胞效应物和多形核中性粒细胞(PMN)靶点之间IL-8的趋化和激活作用。PMN被IL-8激活,分泌过氧化氢和髓过氧化物酶(MPO)。PMN衍生的MPO反过来激活单核细胞,增强对细胞内鸟分枝杆菌的杀伤。CRL1072调节巨噬细胞介导的中性粒细胞激活并接收反馈激活信号的能力可能是其抗细菌活性在体内实现的一种机制。
CRL-1072 is a poloxamer surfactant that kills mycobacteria more effectively within macrophages than in broth cultures. Human macrophages treated with CRL-1072 synthesized interleukin-8 (IL-8), tumor necrosis factor-alpha (TNF-alpha), and granulocyte-macrophage colony-stimulating factor (GM-CSF) in a dose-dependent manner. About 3000 pg of IL-8 per million human macrophages accumulated in cultures treated with 100-1500 ng of poloxamer, with mRNA message for IL-8 induced as early as 2 h. As macrophages do not have IL-RA receptors, a transwell culture was used to study the chemotactic and activating effects of IL-8 between CRL1072-treated human macrophage effectors and polymorphonuclear neutrophil (PMN) targets. PMN were activated by IL-8 and secreted hydrogen peroxide and myeloperoxidase (MPO). MPO derived from PMN, in turn, activated monocytes for an enhanced killing of intracellular Mycobacterium avium. The ability of CRL1072 to modulate macrophage-mediated activation of neutrophils and receive a feedback activation signal may form one mechanism by which its antimycobacterial activity is achieved in vivo.
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