Assessment of the alveolar capillary network in the postnatal mouse lung in 3D using serial block-face scanning electron microscopy
The alveolar capillary network (ACN) has a large surface area that provides the basis for an optimized gas exchange in the lung. It needs to adapt to morphological changes during early lung development and alveolarization. Structural alterations of the pulmonary vasculature can lead to pathological...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
21 November 2019
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| In: |
Frontiers in physiology
Year: 2019, Jahrgang: 10 |
| ISSN: | 1664-042X |
| DOI: | 10.3389/fphys.2019.01357 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.3389/fphys.2019.01357 Verlag, Volltext: https://www.frontiersin.org/articles/10.3389/fphys.2019.01357/full 
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| Verfasserangaben: | Tobias Buchacker, Christian Mühlfeld, Christoph Wrede, Willi L. Wagner, Richard Beare, Matt McCormick and Roman Grothausmann |
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| 520 | |a The alveolar capillary network (ACN) has a large surface area that provides the basis for an optimized gas exchange in the lung. It needs to adapt to morphological changes during early lung development and alveolarization. Structural alterations of the pulmonary vasculature can lead to pathological functional conditions such as in bronchopulmonary dysplasia and various other lung diseases. To understand the development of the ACN and its impact on the pathogenesis of lung diseases, methods are needed that enable comparative analyses of the complex three-dimensional structure of the ACN at different developmental stages and under pathological conditions. In this study a newborn mouse lung was imaged with serial block-face scanning electron microscopy (SBF-SEM) to investigate the ACN and its surrounding structures before the alveolarization process begins. Most parts but not all of the examined ACN contain two layers of capillaries, which were repeatedly connected with each other. A path from an arteriole to a venule was extracted and straightened to allow cross-sectional visualization of the data along the path within a plane. This allows a qualitative characterization of the structures that erythrocytes pass on their way through the ACN. One way to define regions of the ACN supplied by specific arterioles is presented and used for analyses. Pillars, possibly intussusceptive, were found in the vasculature but no specific pattern was observed in regard to parts of the saccular septa. This study provides 3D information with a resolution of about 150 nm on the microscopic structure of a newborn mouse lung and outlines some of the potentials and challenges of SBF-SEM for 3D analyses of the ACN. | ||
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| 700 | 1 | |a Grothausmann, Roman |e VerfasserIn |4 aut | |
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