2008 Projects

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Open Access
M-CSF and GM-CSF influence naïve murine alveolar macrophage differentiation and function in vitro
(Colorado State University. Libraries, 2008) Higgins, Jonathan R., author; Higgins, David M., author; Lee, Eric J., author; Orme, Ian M., author; Gonzalez-Juarrero, Mercedes, author
The objective of this study was to compare the effect of M-CSF and GM-CSF in their abilities to affect the functional and phenotypical characteristics of AMs. In this study, we harvested naïve uninfected murine alveolar macrophages by bronchoalveolar lavage (BAL) and cultured in the presence of M-CSF, GM-CSF or both. GM-CSF stimulated cell proliferation at a higher rate when measured by relative loss of CFDA-SE dye and had higher phagocytic capacity than M-CSF cultured cells. In contrast, alveolar macrophages cultured in the presence of M-CSF exhibited a dendritic-cell-like morphology and upregulated expression of dendriticcell- associated markers like CCR7, MHC II and DEC205. The dendritic cell character of M-CSF-treated AMs was also manifested in their higher capacity to stimulate CD4+ T cell proliferation in a mixed lymphocyte reaction (MLR). This study demonstrates that M-CSF has a strong ability to differentiate AMs into DC-like cells.