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PURPOSE OF REVIEW: Advances in the field of monocyte and macrophage biology have dramatically changed our understanding of their role during homeostasis and inflammation. Here we review the role of these important innate immune effectors in the lung during inflammatory challenges including lung transplantation. RECENT FINDINGS: Neutrophil extravasation into lung tissue and the alveolar space have been shown to be pathogenic during acute lung injury as well as primary graft dysfunction following lung transplantation. Recent advances in lung immunology have demonstrated the remarkable plasticity of both monocytes and macrophages and demonstrated their importance as mediators of neutrophil recruitment and transendothelial migration during inflammation. SUMMARY: Monocytes and macrophages are emerging as key players in mediating both the pathogen response and sterile lung inflammation, including that arising from barotrauma and ischemia-reperfusion injury. Ongoing studies will establish the mechanisms by which these monocytes and macrophages initiate a variety of immune response that lay the fundamental basis of injury response in the lung.
Chiu et al. (Sat,) studied this question.