Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology

Schley G, Jordan J, Ellmann S, Rosen S, Eckardt KU, Uder M, Willam C, Bäuerle T (2018)

Publication Type: Journal article

Publication year: 2018

Journal

PLoS ONE Public Library of Science

Book Volume: 13

Journal Issue: 7

DOI: 10.1371/journal.pone.0200259

Abstract

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.

Authors with CRIS profile

Stephan Ellmann Institute of Radiology Kai-Uwe Eckardt Department of Medicine 4 – Nephrology and Hypertension Michael Uder Lehrstuhl für Diagnostische Radiologie Carsten Willam Department of Medicine 4 – Nephrology and Hypertension Tobias Bäuerle Professur für Multimodale Bildgebung in der präklinischen Forschung

Involved external institutions

Beth Israel Deaconess Medical Center (BIDMC) US United States (USA) (US)

How to cite

APA:

Schley, G., Jordan, J., Ellmann, S., Rosen, S., Eckardt, K.-U., Uder, M.,... Bäuerle, T. (2018). Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology. PLoS ONE, 13(7). https://dx.doi.org/10.1371/journal.pone.0200259

MLA:

Schley, Gunnar, et al. "Multiparametric magnetic resonance imaging of experimental chronic kidney disease: A quantitative correlation study with histology." PLoS ONE 13.7 (2018).

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