Gleeson Laura E, Sheedy Frederick J, Palsson-McDermott Eva M, Triglia Denise, O'Leary Seonadh M, O'Sullivan Mary P, O'Neill Luke A J, Keane Joseph
Department of Clinical Medicine, School of Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland; and
Department of Clinical Medicine, School of Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland; and.
J Immunol. 2016 Mar 15;196(6):2444-9. doi: 10.4049/jimmunol.1501612. Epub 2016 Feb 12.
Recent advances in immunometabolism link metabolic changes in stimulated macrophages to production of IL-1β, a crucial cytokine in the innate immune response to Mycobacterium tuberculosis. To investigate this pathway in the host response to M. tuberculosis, we performed metabolic and functional studies on human alveolar macrophages, human monocyte-derived macrophages, and murine bone marrow-derived macrophages following infection with the bacillus in vitro. M. tuberculosis infection induced a shift from oxidative phosphorylation to aerobic glycolysis in macrophages. Inhibition of this shift resulted in decreased levels of proinflammatory IL-1β and decreased transcription of PTGS2, increased levels of anti-inflammatory IL-10, and increased intracellular bacillary survival. Blockade or absence of IL-1R negated the impact of aerobic glycolysis on intracellular bacillary survival, demonstrating that infection-induced glycolysis limits M. tuberculosis survival in macrophages through induction of IL-1β. Drugs that manipulate host metabolism may be exploited as adjuvants for future therapeutic and vaccination strategies.
免疫代谢领域的最新进展将活化巨噬细胞中的代谢变化与白细胞介素-1β(IL-1β)的产生联系起来,IL-1β是宿主对结核分枝杆菌固有免疫反应中的一种关键细胞因子。为了研究宿主对结核分枝杆菌反应中的这一途径,我们对人肺泡巨噬细胞、人单核细胞衍生巨噬细胞以及体外感染该杆菌后的小鼠骨髓衍生巨噬细胞进行了代谢和功能研究。结核分枝杆菌感染诱导巨噬细胞从氧化磷酸化转变为有氧糖酵解。抑制这种转变会导致促炎细胞因子IL-1β水平降低、PTGS2转录减少、抗炎细胞因子IL-10水平升高以及细胞内杆菌存活率增加。阻断或缺失IL-1受体可消除有氧糖酵解对细胞内杆菌存活的影响,表明感染诱导的糖酵解通过诱导IL-1β来限制巨噬细胞内结核分枝杆菌的存活。调控宿主代谢的药物有望作为未来治疗和疫苗接种策略的佐剂。