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首页> 外文期刊>Inflammation >Synthetic Lipopeptide MALP-2 Inhibits Intracellular Growth of Mycobacterium bovis BCG in Alveolar Macrophages—Preliminary Data
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Synthetic Lipopeptide MALP-2 Inhibits Intracellular Growth of Mycobacterium bovis BCG in Alveolar Macrophages—Preliminary Data

机译:合成脂肽MALP-2抑制肺泡巨噬细胞中牛分枝杆菌BCG的细胞内生长-初步数据

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摘要

Alveolar macrophages (AM) are the primary target cell of the lung for inhaled mycobacterial pathogens. We investigated the effect of the synthetic lipopeptide MALP-2 on the interaction between AM from rats and Mycobacterium bovis BCG. AM were infected with M. bovis BCG at a multiplicity of infection (MOI) of 10 and then cultured in medium alone or medium supplemented with either synthetic macrophage activating lipopeptide-2 (MALP-2), or IFN-γ, or both. Mycobacterial CFU were counted on days 3 and 7 and cell-free supernatants were collected for cytokine measurements. Treatment of macrophages with MALP-2 led to reduced bacterial loads by day 3 and 7 post-infection and at the same time enhanced the release of TNF-α, IL-6 und IL-10 compared to non-stimulated, M. bovis BCG-infected AM. Macrophages co-treated with MALP-2 and IFN-γ or IFN-γ in the absence of MALP-2 limited the growth of M. bovis BCG only by day 3, but not day 7 post-stimulation. Our data show that MALP-2 is effective in decreasing bacterial loads in lung sentinel cells.
机译:肺泡巨噬细胞(AM)是吸入分枝杆菌病原体的主要肺靶细胞。我们研究了合成脂肽MALP-2对大鼠AM与牛分枝杆菌BCG之间相互作用的影响。 AM以10的感染复数(MOI)感染了牛分枝杆菌BCG,然后在单独的培养基或补充有合成巨噬细胞活化脂肽2(MALP-2)或IFN-γ或两者的培养基中培养。在第3天和第7天对分枝杆菌CFU进行计数,并收集无细胞的上清液用于细胞因子的测量。与未刺激的牛分枝杆菌BCG相比,用MALP-2处理巨噬细胞可在感染后第3天和第7天减少细菌载量,同时增强TNF-α,IL-6和IL-10的释放。感染的AM。在不存在MALP-2的情况下,用MALP-2和IFN-γ或IFN-γ共同处理的巨噬细胞仅在刺激后第3天限制了牛分枝杆菌BCG的生长,而没有刺激第7天。我们的数据表明,MALP-2可有效减少肺前哨细胞中的细菌负荷。

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