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High temporal resolution parametric MRI monitoring of the initial ischemia/reperfusion phase in experimental acute kidney injury

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Item Type:Article
Title:High temporal resolution parametric MRI monitoring of the initial ischemia/reperfusion phase in experimental acute kidney injury
Creators Name:Pohlmann, A. and Hentschel, J. and Fechner, M. and Hoff, U. and Bubalo, G. and Arakelyan, K. and Cantow, K. and Seeliger, E. and Flemming, B. and Waiczies, H. and Waiczies, S. and Schunck, W.H. and Dragun, D. and Niendorf, T.
Abstract:Ischemia/reperfusion (I/R) injury, a consequence of kidney hypoperfusion or temporary interruption of blood flow is a common cause of acute kidney injury (AKI). There is an unmet need to better understand the mechanisms operative during the initial phase of ischemic AKI. Non-invasive parametric magnetic resonance imaging (MRI) may elucidate spatio-temporal pathophysiological changes in the kidney by monitoring the MR relaxation parameters T* and T, which are known to be sensitive to blood oxygenation. The aim of our study was to establish the technical feasibility of fast continuous T*/T mapping throughout renal I/R. MRI was combined with a remotely controlled I/R model and a segmentation model based semi-automated quantitative analysis. This technique enabled the detailed assessment of changes in all kidney regions during ischemia and early reperfusion. Significant changes in T* and T were observed shortly after induction of renal ischemia and during the initial reperfusion phase. Our study demonstrated for the first time that continuous and high temporal resolution parametric MRI is feasible for monitoring and characterization of I/R induced AKI in rats. This technique may help in the identification of the timeline of key events responsible for development of renal damage in hypoperfusion-induced AKI.
Source:PLoS ONE
ISSN:1932-6203
Publisher:Public Library of Science (U.S.A.)
Volume:8
Number:2
Page Range:e57411
Date:28 February 2013
Official Publication:https://doi.org/10.1371/journal.pone.0057411
PubMed:View item in PubMed

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