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  • Title: The alveolar macrophage.
    Author: Fels AO, Cohn ZA.
    Journal: J Appl Physiol (1985); 1986 Feb; 60(2):353-69. PubMed ID: 3005225.
    Abstract:
    The alveolar macrophage is one of the few tissue macrophage populations readily accessible to study both in the human and in animals. Since harvesting of these cells by bronchoalveolar lavage was first described in 1961, alveolar macrophages have been extensively investigated. This population is the predominant cell type within the alveolus, and undoubtedly serves as the first line of host defense against inhaled organisms and soluble and particulate molecules. Early studies focussed on this endocytic role and delineated the cells' phagocytic and microbicidal capacities. More recent investigations demonstrated an extensive synthetic and secretory repertoire including lysozyme, neutral proteases, acid hydrolases and O2 metabolites. In addition, the complex immunoregulatory role of the macrophage has also been appreciated. These cells have been shown to produce a wide variety of pro- and anti-inflammatory agents including arachidonic acid metabolites of the cyclooxygenase and lipoxygenase pathways, cytokines which modulate lymphocyte function and factors which promote fibroblast migration and replication.
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