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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2018 ; 13
(7
): e0200259
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Multiparametric magnetic resonance imaging of experimental chronic kidney
disease: A quantitative correlation study with histology
#MMPMID30011301
Schley G
; Jordan J
; Ellmann S
; Rosen S
; Eckardt KU
; Uder M
; Willam C
; Bäuerle T
PLoS One
2018[]; 13
(7
): e0200259
PMID30011301
show ga
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.