Interleukin-12 inhibits eotaxin secretion of cultured primary lung cells and alleviates airway inflammation in vivo.

Interleukin-12 inhibits eotaxin secretion of cultured primary lung cells and alleviates airway inflammation in vivo.
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Interleukin-12 抑制培养的原代肺细胞的嗜酸性粒细胞趋化因子分泌,并减轻体内气道炎症。

DOI:
10.1006/cyto.2002.1950
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发表时间:
2002
期刊:
影响因子:
3.8
通讯作者:
B. Chiang
B. Chiang
中科院分区:
医学3区
文献类型:
--
作者:
Y. Ye;Wan Huang;Yueh;B. Chiang

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引起哮喘气道和肺组织炎症的机制已被广泛研究。研究发现,1型辅助性T细胞(Th 1)相关的细胞因子可减少肺组织嗜酸性粒细胞的聚集,减轻气道收缩。但Th 1细胞因子的治疗机制尚不清楚。在这项研究中,白细胞介素-12(IL-12)DNA质粒作为治疗试剂静脉给药。从IL-12处理的小鼠和对照小鼠收集支气管肺泡灌洗液(BAL),并分析细胞组成和嗜酸性粒细胞趋化因子水平。结果表明,IL-12 DNA质粒在体内能有效抑制嗜酸性粒细胞增多和气道炎症。BAL液中的嗜酸性粒细胞趋化因子水平也降低。为了进一步研究Th 1相关细胞因子如IL-12或干扰素-γ(IFN-γ)对肺细胞产生的嗜酸细胞活化趋化因子水平的影响,建立了原代肺细胞培养物。结果表明,IL-12和IFN-γ都可以抑制IL-13或IL-4刺激的原代肺细胞培养物的嗜酸性粒细胞趋化因子分泌。此外,IL-12的抑制作用不能通过施用抗IFN-γ抗体来逆转。提示IL-12可能通过非IFN-γ依赖性机制抑制肺组织嗜酸性粒细胞趋化因子的分泌,从而调节气道炎症。
The mechanisms that cause the inflammation of airway and lung tissue in asthma have been studied extensively. It is noted that type 1T helper cell (Th1)-related cytokines could decrease the accumulation of eosinophils in lung tissue and relieve airway constriction. But the therapeutic mechanisms of Th1 cytokines remain unclear. In this study, interleukin-12 (IL-12) DNA plasmid as a therapeutic reagent was delivered intravenously. Bronchoalveolar lavage (BAL) fluids were collected from IL-12 treated and control mice, and analyzed for cell composition and eotaxin level. The results showed that IL-12 DNA plasmid could effectively inhibit eosinophilia and airway inflammation in vivo. The level of eotaxin in BAL fluid also decreased. To further investigate the effect of Th1-related cytokines such as IL-12 or interferon-gamma (IFN-gamma) on the eotaxin level produced by lung cells, primary lung cell culture was established. The results demonstrated that both IL-12 and IFN-gamma could suppress eotaxin secretion from IL-13 or IL-4 stimulated primary lung cell culture. Moreover, the inhibitory effect of IL-12 could not be reversed by the administration of anti-IFN-gamma antibody. All the evidences suggested that IL-12 could regulate airway inflammation by suppressing the eotaxin secretion of lung tissue through an IFN-gamma independent mechanism.
白介素 12 和钢因子之间的协同相互作用支持培养物中小鼠淋巴造血祖细胞的增殖。
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发表时间: 1996
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