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Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology
OBJECTIVES: In human chronic kidney disease (CKD) the extent of renal tubulointerstitial fibrosis correlates with progressive loss of renal function. However, fibrosis can so far only be assessed by histology of kidney biopsies. Magnetic resonance imaging (MRI) can provide information about tissue a...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6047786/ https://www.ncbi.nlm.nih.gov/pubmed/30011301 http://dx.doi.org/10.1371/journal.pone.0200259 |
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author | Schley, Gunnar Jordan, Jutta Ellmann, Stephan Rosen, Seymour Eckardt, Kai-Uwe Uder, Michael Willam, Carsten Bäuerle, Tobias |
author_facet | Schley, Gunnar Jordan, Jutta Ellmann, Stephan Rosen, Seymour Eckardt, Kai-Uwe Uder, Michael Willam, Carsten Bäuerle, Tobias |
author_sort | Schley, Gunnar |
collection | PubMed |
description | OBJECTIVES: In human chronic kidney disease (CKD) the extent of renal tubulointerstitial fibrosis correlates with progressive loss of renal function. However, fibrosis can so far only be assessed by histology of kidney biopsies. Magnetic resonance imaging (MRI) can provide information about tissue architecture, but its potential to assess fibrosis and inflammation in diseased kidneys remains poorly defined. MATERIALS AND METHODS: We evaluated excised kidneys in a murine adenine-induced nephropathy model for CKD by MRI and correlated quantitative MRI parameters (T1, T2, and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy) with histological hallmarks of progressive CKD, including renal fibrosis, inflammation, and microvascular rarefaction. Furthermore, we analyzed the effects of paraformaldehyde fixation on MRI parameters by comparing kidney samples before and after fixation with paraformaldehyde. RESULTS: In diseased kidneys T2 and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy in the renal cortex and/or outer medulla were significantly different from those in control kidneys. In particular, T2 relaxation time was the best parameter to distinguish control and CKD groups and correlated very well with the extent of fibrosis, inflammatory infiltrates, tubular dilation, crystal deposition, and loss of peritubular capillaries and normal tubules in the renal cortex and outer medulla. Fixation with paraformaldehyde had no impact on T2 relaxation time and fractional anisotropy, whereas T1 times significantly decreased and T2* times and apparent diffusion coefficients increased in fixed kidney tissue. CONCLUSIONS: MRI parameters provide a promising approach to quantitatively assess renal fibrosis and inflammation in CKD. Especially T2 relaxation time correlates well with histological features of CKD and is not influenced by paraformaldehyde fixation of kidney samples. Thus, T2 relaxation time might be a candidate parameter for non-invasive assessment of renal fibrosis in human patients. |
format | Online Article Text |
id | pubmed-6047786 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-60477862018-07-26 Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology Schley, Gunnar Jordan, Jutta Ellmann, Stephan Rosen, Seymour Eckardt, Kai-Uwe Uder, Michael Willam, Carsten Bäuerle, Tobias PLoS One Research Article OBJECTIVES: In human chronic kidney disease (CKD) the extent of renal tubulointerstitial fibrosis correlates with progressive loss of renal function. However, fibrosis can so far only be assessed by histology of kidney biopsies. Magnetic resonance imaging (MRI) can provide information about tissue architecture, but its potential to assess fibrosis and inflammation in diseased kidneys remains poorly defined. MATERIALS AND METHODS: We evaluated excised kidneys in a murine adenine-induced nephropathy model for CKD by MRI and correlated quantitative MRI parameters (T1, T2, and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy) with histological hallmarks of progressive CKD, including renal fibrosis, inflammation, and microvascular rarefaction. Furthermore, we analyzed the effects of paraformaldehyde fixation on MRI parameters by comparing kidney samples before and after fixation with paraformaldehyde. RESULTS: In diseased kidneys T2 and T2* relaxation times, apparent diffusion coefficient and fractional anisotropy in the renal cortex and/or outer medulla were significantly different from those in control kidneys. In particular, T2 relaxation time was the best parameter to distinguish control and CKD groups and correlated very well with the extent of fibrosis, inflammatory infiltrates, tubular dilation, crystal deposition, and loss of peritubular capillaries and normal tubules in the renal cortex and outer medulla. Fixation with paraformaldehyde had no impact on T2 relaxation time and fractional anisotropy, whereas T1 times significantly decreased and T2* times and apparent diffusion coefficients increased in fixed kidney tissue. CONCLUSIONS: MRI parameters provide a promising approach to quantitatively assess renal fibrosis and inflammation in CKD. Especially T2 relaxation time correlates well with histological features of CKD and is not influenced by paraformaldehyde fixation of kidney samples. Thus, T2 relaxation time might be a candidate parameter for non-invasive assessment of renal fibrosis in human patients. Public Library of Science 2018-07-16 /pmc/articles/PMC6047786/ /pubmed/30011301 http://dx.doi.org/10.1371/journal.pone.0200259 Text en © 2018 Schley et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Schley, Gunnar Jordan, Jutta Ellmann, Stephan Rosen, Seymour Eckardt, Kai-Uwe Uder, Michael Willam, Carsten Bäuerle, Tobias Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title | Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title_full | Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title_fullStr | Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title_full_unstemmed | Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title_short | Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology |
title_sort | multiparametric magnetic resonance imaging of experimental chronic kidney disease: a quantitative correlation study with histology |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6047786/ https://www.ncbi.nlm.nih.gov/pubmed/30011301 http://dx.doi.org/10.1371/journal.pone.0200259 |
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