A novel method for isolating individual cellular components from the adult human distal lung

N Fujino, H Kubo, C Ota, T Suzuki, S Suzuki… - American journal of …, 2012 - atsjournals.org
N Fujino, H Kubo, C Ota, T Suzuki, S Suzuki, M Yamada, T Takahashi, M He, T Suzuki…
American journal of respiratory cell and molecular biology, 2012atsjournals.org
A variety of lung diseases, such as pulmonary emphysema and idiopathic pulmonary
fibrosis, develop in the lung alveoli. Multiple cell types are localized in the alveoli, including
epithelial, mesenchymal, and endothelial cells. These resident cells participate in the
pathogenesis of lung disease in various ways. To elaborate clearly on the mechanisms of
these pathologic processes, cell type–specific analyses of lung disease are required.
However, no method exists for individually isolating the different types of cells found in the …
A variety of lung diseases, such as pulmonary emphysema and idiopathic pulmonary fibrosis, develop in the lung alveoli. Multiple cell types are localized in the alveoli, including epithelial, mesenchymal, and endothelial cells. These resident cells participate in the pathogenesis of lung disease in various ways. To elaborate clearly on the mechanisms of these pathologic processes, cell type–specific analyses of lung disease are required. However, no method exists for individually isolating the different types of cells found in the alveoli. We report on the development of a FACS-based method for the direct isolation of individual cell types from the adult human distal lung. We obtained human lung tissue from lung resections, and prepared single-cell suspension. After depleting CD45-positive cells, a combination of antibodies against epithelial cell adhesion molecule (EpCAM), T1α, and vascular endothelial (VE)-cadherin as used to delineate alveolar cell types. Alveolar Type II cells were highly purified in the EpCAMhi/T1α subset, whereas the EpCAM+/T1α−/low subset contained a mixed epithelial population consisting of alveolar Type I and bronchiolar epithelial cells. The EpCAM/T1α subset included both microvascular endothelial and mesenchymal cells, and these were separated by immunoreactivity to VE-cadherin. Lymphatic endothelial cells existed in the EpCAM/T1αhi subset. Isolated cells were viable, and further cell culture studies could be performed. These results suggest that this novel method enables the isolation of different cellular components from normal and diseased lungs, and is capable of elucidating phenotypes specific to certain alveolar cell types indicative of lung disease.
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