Croasdell Amanda, Thatcher Thomas H, Kottmann R Matthew, Colas Romain A, Dalli Jesmond, Serhan Charles N, Sime Patricia J, Phipps Richard P
Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York; Lung Biology and Disease Program, University of Rochester School of Medicine and Dentistry, Rochester, New York;
Lung Biology and Disease Program, University of Rochester School of Medicine and Dentistry, Rochester, New York; Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York; and.
Am J Physiol Lung Cell Mol Physiol. 2015 Oct 15;309(8):L888-901. doi: 10.1152/ajplung.00125.2015. Epub 2015 Aug 21.
Inflammation is a protective response to injury, but it can become chronic, leading to tissue damage and disease. Cigarette smoke causes multiple inflammatory diseases, which account for thousands of deaths and cost billions of dollars annually. Cigarette smoke disrupts the function of immune cells, such as macrophages, by prolonging inflammatory signaling, promoting oxidative stress, and impairing phagocytosis, contributing to increased incidence of infections. Recently, new families of lipid-derived mediators, "specialized proresolving mediators" (SPMs), were identified. SPMs play a critical role in the active resolution of inflammation by counterregulating proinflammatory signaling and promoting resolution pathways. We have identified dysregulated concentrations of lipid mediators in exhaled breath condensate, bronchoalveolar lavage fluid, and serum from patients with chronic obstructive pulmonary disease (COPD). In human alveolar macrophages from COPD and non-COPD patients, D-series resolvins decreased inflammatory cytokines and enhanced phagocytosis. To further investigate the actions of resolvins on human cells, macrophages were differentiated from human blood monocytes and treated with D-series resolvins and then exposed to cigarette smoke extract. Resolvins significantly suppressed macrophage production of proinflammatory cytokines, enzymes, and lipid mediators. Resolvins also increased anti-inflammatory cytokines, promoted an M2 macrophage phenotype, and restored cigarette smoke-induced defects in phagocytosis, highlighting the proresolving functions of these molecules. These actions were receptor-dependent and involved modulation of canonical and noncanonical NF-κB expression, with the first evidence for SPM action on alternative NF-κB signaling. These data show that resolvins act on human macrophages to attenuate cigarette smoke-induced inflammatory effects through proresolving mechanisms and provide new evidence of the therapeutic potential of SPMs.
炎症是对损伤的一种保护性反应,但它可能会变为慢性,导致组织损伤和疾病。香烟烟雾会引发多种炎症性疾病,每年造成数千人死亡并花费数十亿美元。香烟烟雾通过延长炎症信号传导、促进氧化应激和损害吞噬作用来破坏免疫细胞(如巨噬细胞)的功能,从而导致感染发生率增加。最近,新的脂质衍生介质家族“特殊促消退介质”(SPMs)被鉴定出来。SPMs通过对抗调节促炎信号传导和促进消退途径,在炎症的主动消退中发挥关键作用。我们已经确定慢性阻塞性肺疾病(COPD)患者呼出气体冷凝物、支气管肺泡灌洗液和血清中的脂质介质浓度失调。在COPD患者和非COPD患者的人肺泡巨噬细胞中,D系列消退素可减少炎症细胞因子并增强吞噬作用。为了进一步研究消退素对人体细胞的作用,从人血单核细胞中分化出巨噬细胞,用D系列消退素处理,然后暴露于香烟烟雾提取物中。消退素显著抑制巨噬细胞促炎细胞因子、酶和脂质介质的产生。消退素还增加抗炎细胞因子,促进M2巨噬细胞表型,并恢复香烟烟雾诱导的吞噬作用缺陷,突出了这些分子的促消退功能。这些作用是受体依赖性的,涉及经典和非经典NF-κB表达的调节,这是SPM对替代NF-κB信号传导作用的首个证据。这些数据表明,消退素通过促消退机制作用于人体巨噬细胞,以减轻香烟烟雾诱导的炎症效应,并为SPMs的治疗潜力提供了新证据。