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Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction
The extent of infarct injury is a key determinant of structural and functional remodeling following myocardial infarction (MI). Infarct volume in experimental models of MI can be determined accurately by in vivo magnetic resonance imaging (MRI), but this is costly and not widely available. Experimen...
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/PMC4537945/ https://www.ncbi.nlm.nih.gov/pubmed/26071543 http://dx.doi.org/10.1152/ajpheart.00233.2015 |
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author | Zhao, X. Wu, J. Gray, C. D. McGregor, K. Rossi, A. G. Morrison, H. Jansen, M. A. Gray, G. A. |
author_facet | Zhao, X. Wu, J. Gray, C. D. McGregor, K. Rossi, A. G. Morrison, H. Jansen, M. A. Gray, G. A. |
author_sort | Zhao, X. |
collection | PubMed |
description | The extent of infarct injury is a key determinant of structural and functional remodeling following myocardial infarction (MI). Infarct volume in experimental models of MI can be determined accurately by in vivo magnetic resonance imaging (MRI), but this is costly and not widely available. Experimental studies therefore commonly assess injury by histological analysis of sections sampled from the infarcted heart, an approach that is labor intensive, can be subjective, and does not fully assess the extent of injury. The present study aimed to assess the suitability of optical projection tomography (OPT) for identification of injured myocardium and for accurate and efficient assessment of infarct volume. Intact, perfusion-fixed, optically cleared hearts, collected from mice 7 days after induction of MI by coronary artery occlusion, were scanned by a tomograph for autofluorescence emission after UV excitation, generating >400 transaxial sections for reconstruction. Differential autofluorescence permitted discrimination between viable and injured myocardium and highlighted the heterogeneity within the infarct zone. Two-dimensional infarct areas derived from OPT imaging and Masson's trichrome staining of slices from the same heart were highly correlated (r(2) = 0.99, P < 0.0001). Infarct volume derived from reconstructed OPT sections correlated with volume derived from in vivo late gadolinium enhancement MRI (r(2) = 0.7608, P < 0.005). Tissue processing for OPT did not compromise subsequent immunohistochemical detection of endothelial cell and inflammatory cell markers. OPT is thus a nondestructive, efficient, and accurate approach for routine in vitro assessment of murine myocardial infarct volume. |
format | Online Article Text |
id | pubmed-4537945 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American Physiological Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-45379452015-08-31 Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction Zhao, X. Wu, J. Gray, C. D. McGregor, K. Rossi, A. G. Morrison, H. Jansen, M. A. Gray, G. A. Am J Physiol Heart Circ Physiol Integrative Cardiovascular Physiology and Pathophysiology The extent of infarct injury is a key determinant of structural and functional remodeling following myocardial infarction (MI). Infarct volume in experimental models of MI can be determined accurately by in vivo magnetic resonance imaging (MRI), but this is costly and not widely available. Experimental studies therefore commonly assess injury by histological analysis of sections sampled from the infarcted heart, an approach that is labor intensive, can be subjective, and does not fully assess the extent of injury. The present study aimed to assess the suitability of optical projection tomography (OPT) for identification of injured myocardium and for accurate and efficient assessment of infarct volume. Intact, perfusion-fixed, optically cleared hearts, collected from mice 7 days after induction of MI by coronary artery occlusion, were scanned by a tomograph for autofluorescence emission after UV excitation, generating >400 transaxial sections for reconstruction. Differential autofluorescence permitted discrimination between viable and injured myocardium and highlighted the heterogeneity within the infarct zone. Two-dimensional infarct areas derived from OPT imaging and Masson's trichrome staining of slices from the same heart were highly correlated (r(2) = 0.99, P < 0.0001). Infarct volume derived from reconstructed OPT sections correlated with volume derived from in vivo late gadolinium enhancement MRI (r(2) = 0.7608, P < 0.005). Tissue processing for OPT did not compromise subsequent immunohistochemical detection of endothelial cell and inflammatory cell markers. OPT is thus a nondestructive, efficient, and accurate approach for routine in vitro assessment of murine myocardial infarct volume. American Physiological Society 2015-06-12 2015-08-15 /pmc/articles/PMC4537945/ /pubmed/26071543 http://dx.doi.org/10.1152/ajpheart.00233.2015 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 | Integrative Cardiovascular Physiology and Pathophysiology Zhao, X. Wu, J. Gray, C. D. McGregor, K. Rossi, A. G. Morrison, H. Jansen, M. A. Gray, G. A. Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title | Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title_full | Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title_fullStr | Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title_full_unstemmed | Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title_short | Optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
title_sort | optical projection tomography permits efficient assessment of infarct volume in the murine heart postmyocardial infarction |
topic | Integrative Cardiovascular Physiology and Pathophysiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4537945/ https://www.ncbi.nlm.nih.gov/pubmed/26071543 http://dx.doi.org/10.1152/ajpheart.00233.2015 |
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