論文 - 詳細
| RRC ID | 46911 |
|---|---|
| 著者 | Bhatia S, Fei M, Yarlagadda M, Qi Z, Akira S, Saijo S, Iwakura Y, van Rooijen N, Gibson GA, St Croix CM, Ray A, Ray P. |
| タイトル | Rapid host defense against Aspergillus fumigatus involves alveolar macrophages with a predominance of alternatively activated phenotype. |
| ジャーナル | PLoS One |
| Abstract |
The ubiquitous fungus Aspergillus fumigatus is associated with chronic diseases such as invasive pulmonary aspergillosis in immunosuppressed patients and allergic bronchopulmonary aspergillosis (ABPA) in patients with cystic fibrosis or severe asthma. Because of constant exposure to this fungus, it is critical for the host to exercise an immediate and decisive immune response to clear fungal spores to ward off disease. In this study, we observed that rapidly after infection by A. fumigatus, alveolar macrophages predominantly express Arginase 1 (Arg1), a key marker of alternatively activated macrophages (AAMs). The macrophages were also found to express Ym1 and CD206 that are also expressed by AAMs but not NOS2, which is expressed by classically activated macrophages. The expression of Arg1 was reduced in the absence of the known signaling axis, IL-4Rα/STAT6, for AAM development. While both Dectin-1 and TLR expressed on the cell surface have been shown to sense A. fumigatus, fungus-induced Arg1 expression in CD11c(+) alveolar macrophages was not dependent on either Dectin-1 or the adaptor MyD88 that mediates intracellular signaling by most TLRs. Alveolar macrophages from WT mice efficiently phagocytosed fungal conidia, but those from mice deficient in Dectin-1 showed impaired fungal uptake. Depletion of macrophages with clodronate-filled liposomes increased fungal burden in infected mice. Collectively, our studies suggest that alveolar macrophages, which predominantly acquire an AAM phenotype following A. fumigatus infection, have a protective role in defense against this fungus. |
| 巻・号 | 6(1) |
| ページ | e15943 |
| 公開日 | 2011-1-5 |
| DOI | 10.1371/journal.pone.0015943 |
| PMID | 21246055 |
| PMC | PMC3016416 |
| MeSH | Animals Arginase / immunology Aspergillus fumigatus / immunology* Cells, Cultured Gene Expression Immunity Lectins, C-Type Macrophages, Alveolar / immunology* Macrophages, Alveolar / metabolism Macrophages, Alveolar / microbiology* Membrane Proteins / immunology Mice Nerve Tissue Proteins / immunology Opportunistic Infections Phagocytosis / immunology Phenotype |
| IF | 2.74 |
| 引用数 | 62 |
| WOS 分野 | IMMUNOLOGY |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 各媒体での言及数の合計 | 0 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 病原微生物 | |