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- W2022750680 abstract "Mycobacterium tuberculosis comes in contact with pulmonary surfactant, alveolar macrophages and type II epithelial cells. Alveolar type II epithelial cells secrete pulmonary surfactant, a complex mixture of phospholipids and proteins lining the alveolar surface, while alveolar macrophages are involved in surfactant catabolism. Surfactant proteins SP-A and SP-D modulate phagocytosis of M. tuberculosis by alveolar macrophages. We have reported that mice with decreased surfactant catabolism resulting from GM-CSF deficiency are highly susceptible to acute aerosol infection with 100 cfu of M. tuberculosis. Here, we evaluated the lungs of WT, GM-CSF-deficient, and GM-CSF-corrected mice surviving six months after sub-acute aerosol infection of 5-10 cfu M. tuberculosis. We show that GM-CSF-deficient mice develop intra-bronchial and intra-alveolar tuberculosis lesions with numerous mycobacteria, inflammatory cells, and extracellular proteinaceous material containing surfactant protein B (SP-B). In contrast, WT and GM-CSF-corrected mice develop typical epithelioid granulomas containing lymphocytes, SP-B positive cells, and M. tuberculosis bacilli inside macrophages. Our findings support the concept that whole pulmonary surfactant is an important component of host mycobacterial infection in the distal lung." @default.
- W2022750680 created "2016-06-24" @default.
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- W2022750680 date "2009-12-01" @default.
- W2022750680 modified "2023-10-17" @default.
- W2022750680 title "Pulmonary surfactant and tuberculosis" @default.
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- W2022750680 doi "https://doi.org/10.1016/s1472-9792(09)70005-8" @default.
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