Cystic Fibrosis Lung Immunity: The Rose of the Macrophage

Cystic fibrosis (CF) pathophysiology is hallmarked by excessive inflammation and the inability to efficiently resolve lung infections, contributing to major morbidity and eventually the mortality of patients with this disease. Macrophages (M Phi s) are major players in lung homeostasis through their diverse contributions to both the innate and adaptive immune networks. The setting of M Phi function and activity in CF is multifaceted, encompassing the response to the unique environmental cues in the CF lung as well as the intrinsic changes resulting from CFTR dysfunction. The complexity is further enhanced with the identification of modifier genes, which modulate the CFTR contribution to disease, resulting in epigenetic and transcriptional shifts in M Phi phenotype. This review focuses on the contribution of M Phi to lung homeostasis, providing an overview of the diverse literature and various perspectives on the role of these immune guardians in CF. (C) 2016 S. Karger AG, Basel