Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model

The visualization of viral pathogens in infected tissues is an invaluable tool to understand spatial virus distribution, localization, and cell tropism in vivo. Commonly, virus-infected tissues are analyzed using conventional immunohistochemistry in paraffin-embedded thin sections. Here, we demonstr...

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Main Authors: Luca M. Zaeck, David Scheibner, Julia Sehl, Martin Müller, Donata Hoffmann, Martin Beer, Elsayed M. Abdelwhab, Thomas C. Mettenleiter, Angele Breithaupt, Stefan Finke
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Viruses
Subjects:
Online Access:https://www.mdpi.com/1999-4915/13/3/529
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author Luca M. Zaeck
David Scheibner
Julia Sehl
Martin Müller
Donata Hoffmann
Martin Beer
Elsayed M. Abdelwhab
Thomas C. Mettenleiter
Angele Breithaupt
Stefan Finke
author_facet Luca M. Zaeck
David Scheibner
Julia Sehl
Martin Müller
Donata Hoffmann
Martin Beer
Elsayed M. Abdelwhab
Thomas C. Mettenleiter
Angele Breithaupt
Stefan Finke
author_sort Luca M. Zaeck
collection DOAJ
description The visualization of viral pathogens in infected tissues is an invaluable tool to understand spatial virus distribution, localization, and cell tropism in vivo. Commonly, virus-infected tissues are analyzed using conventional immunohistochemistry in paraffin-embedded thin sections. Here, we demonstrate the utility of volumetric three-dimensional (3D) immunofluorescence imaging using tissue optical clearing and light sheet microscopy to investigate host–pathogen interactions of pandemic SARS-CoV-2 in ferrets at a mesoscopic scale. The superior spatial context of large, intact samples (>150 mm<sup>3</sup>) allowed detailed quantification of interrelated parameters like focus-to-focus distance or SARS-CoV-2-infected area, facilitating an in-depth description of SARS-CoV-2 infection foci. Accordingly, we could confirm a preferential infection of the ferret upper respiratory tract by SARS-CoV-2 and suggest clustering of infection foci in close proximity. Conclusively, we present a proof-of-concept study for investigating critically important respiratory pathogens in their spatial tissue morphology and demonstrate the first specific 3D visualization of SARS-CoV-2 infection.
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spelling doaj.art-2a981cd7d8914797bc7d0f1bad3f13502023-11-21T11:43:40ZengMDPI AGViruses1999-49152021-03-0113352910.3390/v13030529Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret ModelLuca M. Zaeck0David Scheibner1Julia Sehl2Martin Müller3Donata Hoffmann4Martin Beer5Elsayed M. Abdelwhab6Thomas C. Mettenleiter7Angele Breithaupt8Stefan Finke9Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyDepartment of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Diagnostic Virology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Diagnostic Virology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyFriedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyDepartment of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyInstitute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, GermanyThe visualization of viral pathogens in infected tissues is an invaluable tool to understand spatial virus distribution, localization, and cell tropism in vivo. Commonly, virus-infected tissues are analyzed using conventional immunohistochemistry in paraffin-embedded thin sections. Here, we demonstrate the utility of volumetric three-dimensional (3D) immunofluorescence imaging using tissue optical clearing and light sheet microscopy to investigate host–pathogen interactions of pandemic SARS-CoV-2 in ferrets at a mesoscopic scale. The superior spatial context of large, intact samples (>150 mm<sup>3</sup>) allowed detailed quantification of interrelated parameters like focus-to-focus distance or SARS-CoV-2-infected area, facilitating an in-depth description of SARS-CoV-2 infection foci. Accordingly, we could confirm a preferential infection of the ferret upper respiratory tract by SARS-CoV-2 and suggest clustering of infection foci in close proximity. Conclusively, we present a proof-of-concept study for investigating critically important respiratory pathogens in their spatial tissue morphology and demonstrate the first specific 3D visualization of SARS-CoV-2 infection.https://www.mdpi.com/1999-4915/13/3/529SARS-CoV-2COVID-193D immunofluorescencelight sheet microscopyconfocal laser scanning microscopytissue optical clearing
spellingShingle Luca M. Zaeck
David Scheibner
Julia Sehl
Martin Müller
Donata Hoffmann
Martin Beer
Elsayed M. Abdelwhab
Thomas C. Mettenleiter
Angele Breithaupt
Stefan Finke
Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
Viruses
SARS-CoV-2
COVID-19
3D immunofluorescence
light sheet microscopy
confocal laser scanning microscopy
tissue optical clearing
title Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
title_full Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
title_fullStr Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
title_full_unstemmed Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
title_short Light Sheet Microscopy-Assisted 3D Analysis of SARS-CoV-2 Infection in the Respiratory Tract of the Ferret Model
title_sort light sheet microscopy assisted 3d analysis of sars cov 2 infection in the respiratory tract of the ferret model
topic SARS-CoV-2
COVID-19
3D immunofluorescence
light sheet microscopy
confocal laser scanning microscopy
tissue optical clearing
url https://www.mdpi.com/1999-4915/13/3/529
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