Time Course of the Phenotype of Blood and Bone Marrow Monocytes and Macrophages in the Lung after Cigarette Smoke Exposure In Vivo

International Journal of Molecular Sciences

Mariana Renovato-Martins¹  Samuel dos Santos Valença²  Andréa Monte-Alto-Costa³  Luís Cristóvão Pôrto⁴  Camila Oliveira da Silva⁴  Tatiana Victoni⁴  Filipe Jorge Viana Nascimento⁴  Vincent Lagente⁵ 

[1] Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20551-030, Brazil;Laboratório de Biologia Redox, ICB/Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;Laboratório de Reparo Tecidual, DHE/IBRAG/Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20950-003, Brazil;Laboratório e Histocompatibilidade e Criopreservação, HLA/Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20950-000, Brazil;Nutrition, Métabolismes et Cancer, NUMECAN Unité, Institut national de la santé et de la recherche médicale, INSERM 1241/Institut national de la recherche agronomique, INRA 1341/Université de Rennes 1, 35000 Rennes, France;

关键词: COPD;    macrophages;    cigarette smoke;    monocytes;   

DOI  :  10.3390/ijms18091940

来源: DOAJ

【 摘 要 】

Alveolar macrophages play a central role in the pathogenesis of chronic obstructive pulmonary disease (COPD). Monocytes are recruited from blood during inflammation and then mature into alveolar macrophages. The aim of this study was to investigate the effect of cigarette smoke (CS) at different times in lung macrophages and monocytes from blood and bone marrow in mice. Male mice (C57BL/6, n = 45) were divided into groups: control, CS 5 days, CS 14 days and CS 30 days. Five days’ CS exposure induced a pronounced influx of neutrophils and macrophages in the lung associated with increased levels of keratinocyte chemoattractant (KC), tumor necrosis factor-α (TNF-α), nitric oxide (NO) and matrix metalloproteinase (MMP)-12. After 14 days of CS exposure, neutrophil recruitment and cytokine production were greatly reduced. Moreover, chronic CS exposure led to increased recruitment of macrophages (with high expression of CD206), transforming growth factor-β (TGF-β) production as well as no detection of TNF-α, interleukin (IL)-6 and KC. CS can also change the monocyte phenotype in the blood and bone marrow, with an increase in Ly6Clow cells. These results show for the first time that CS can change not only macrophage polarization but also monocyte. These results suggest that continued recruitment of Ly6Clow monocytes may help the distinct renewing macrophage M2 population required for COPD progression.

【 授权许可】

Unknown