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In vivo compartmental analysis of leukocytes in mouse lungs
The lung has a unique structure consisting of three functionally different compartments (alveolar, interstitial, and vascular) situated in an extreme proximity. Current methods to localize lung leukocytes using bronchoalveolar lavage and/or lung perfusion have significant limitations for determinati...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Physiological Society
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4593833/ https://www.ncbi.nlm.nih.gov/pubmed/26254421 http://dx.doi.org/10.1152/ajplung.00140.2015 |
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author | Patel, Brijesh V. Tatham, Kate C. Wilson, Michael R. O'Dea, Kieran P. Takata, Masao |
author_facet | Patel, Brijesh V. Tatham, Kate C. Wilson, Michael R. O'Dea, Kieran P. Takata, Masao |
author_sort | Patel, Brijesh V. |
collection | PubMed |
description | The lung has a unique structure consisting of three functionally different compartments (alveolar, interstitial, and vascular) situated in an extreme proximity. Current methods to localize lung leukocytes using bronchoalveolar lavage and/or lung perfusion have significant limitations for determination of location and phenotype of leukocytes. Here we present a novel method using in vivo antibody labeling to enable accurate compartmental localization/quantification and phenotyping of mouse lung leukocytes. Anesthetized C57BL/6 mice received combined in vivo intravenous and intratracheal labeling with fluorophore-conjugated anti-CD45 antibodies, and lung single-cell suspensions were analyzed by flow cytometry. The combined in vivo intravenous and intratracheal CD45 labeling enabled robust separation of the alveolar, interstitial, and vascular compartments of the lung. In naive mice, the alveolar compartment consisted predominantly of resident alveolar macrophages. The interstitial compartment, gated by events negative for both intratracheal and intravenous CD45 staining, showed two conventional dendritic cell populations, as well as a Ly6C(lo) monocyte population. Expression levels of MHCII on these interstitial monocytes were much higher than on the vascular Ly6C(lo) monocyte populations. In mice exposed to acid aspiration-induced lung injury, this protocol also clearly distinguished the three lung compartments showing the dynamic trafficking of neutrophils and exudative monocytes across the lung compartments during inflammation and resolution. This simple in vivo dual-labeling technique substantially increases the accuracy and depth of lung flow cytometric analysis, facilitates a more comprehensive examination of lung leukocyte pools, and enables the investigation of previously poorly defined “interstitial” leukocyte populations during models of inflammatory lung diseases. |
format | Online Article Text |
id | pubmed-4593833 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American Physiological Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-45938332016-02-08 In vivo compartmental analysis of leukocytes in mouse lungs Patel, Brijesh V. Tatham, Kate C. Wilson, Michael R. O'Dea, Kieran P. Takata, Masao Am J Physiol Lung Cell Mol Physiol Innovatiove Methodology The lung has a unique structure consisting of three functionally different compartments (alveolar, interstitial, and vascular) situated in an extreme proximity. Current methods to localize lung leukocytes using bronchoalveolar lavage and/or lung perfusion have significant limitations for determination of location and phenotype of leukocytes. Here we present a novel method using in vivo antibody labeling to enable accurate compartmental localization/quantification and phenotyping of mouse lung leukocytes. Anesthetized C57BL/6 mice received combined in vivo intravenous and intratracheal labeling with fluorophore-conjugated anti-CD45 antibodies, and lung single-cell suspensions were analyzed by flow cytometry. The combined in vivo intravenous and intratracheal CD45 labeling enabled robust separation of the alveolar, interstitial, and vascular compartments of the lung. In naive mice, the alveolar compartment consisted predominantly of resident alveolar macrophages. The interstitial compartment, gated by events negative for both intratracheal and intravenous CD45 staining, showed two conventional dendritic cell populations, as well as a Ly6C(lo) monocyte population. Expression levels of MHCII on these interstitial monocytes were much higher than on the vascular Ly6C(lo) monocyte populations. In mice exposed to acid aspiration-induced lung injury, this protocol also clearly distinguished the three lung compartments showing the dynamic trafficking of neutrophils and exudative monocytes across the lung compartments during inflammation and resolution. This simple in vivo dual-labeling technique substantially increases the accuracy and depth of lung flow cytometric analysis, facilitates a more comprehensive examination of lung leukocyte pools, and enables the investigation of previously poorly defined “interstitial” leukocyte populations during models of inflammatory lung diseases. American Physiological Society 2015-08-07 2015-10-01 /pmc/articles/PMC4593833/ /pubmed/26254421 http://dx.doi.org/10.1152/ajplung.00140.2015 Text en Copyright © 2015 the American Physiological Society Licensed under Creative Commons Attribution CC-BY 3.0 (http://creativecommons.org/licenses/by/3.0/deed.en_US) : © the American Physiological Society. |
spellingShingle | Innovatiove Methodology Patel, Brijesh V. Tatham, Kate C. Wilson, Michael R. O'Dea, Kieran P. Takata, Masao In vivo compartmental analysis of leukocytes in mouse lungs |
title | In vivo compartmental analysis of leukocytes in mouse lungs |
title_full | In vivo compartmental analysis of leukocytes in mouse lungs |
title_fullStr | In vivo compartmental analysis of leukocytes in mouse lungs |
title_full_unstemmed | In vivo compartmental analysis of leukocytes in mouse lungs |
title_short | In vivo compartmental analysis of leukocytes in mouse lungs |
title_sort | in vivo compartmental analysis of leukocytes in mouse lungs |
topic | Innovatiove Methodology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4593833/ https://www.ncbi.nlm.nih.gov/pubmed/26254421 http://dx.doi.org/10.1152/ajplung.00140.2015 |
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