Imaging the pH evolution of an acute kidney injury model by means of iopamidol, a MRI-CEST pH-responsive contrast agent
Article first published online: 11 OCT 2012
Copyright © 2012 Wiley Periodicals, Inc.
Magnetic Resonance in Medicine
Volume 70, Issue 3, pages 859–864, September 2013
How to Cite
Longo, D. L., Busato, A., Lanzardo, S., Antico, F. and Aime, S. (2013), Imaging the pH evolution of an acute kidney injury model by means of iopamidol, a MRI-CEST pH-responsive contrast agent. Magn Reson Med, 70: 859–864. doi: 10.1002/mrm.24513
- Issue published online: 27 AUG 2013
- Article first published online: 11 OCT 2012
- Manuscript Accepted: 10 SEP 2012
- Manuscript Revised: 10 AUG 2012
- Manuscript Received: 20 JUN 2012
- Piedmont regional government (NanoIGT project/CIPE2007)
- chemical exchange saturation transfer;
- responsive contrast agent;
- acute kidney injury;
To investigate in vivo possible pH level alterations following an acute renal failure disease using a MRI-CEST pH responsive contrast agent. The impact of functional evolution in different renal compartments over time was also investigated.
a mouse model of acute kidney injury was obtained by glycerol-induced rhabdomyolysis. pH maps were obtained using Iopamidol (0.75 g iodine/kg b.w. corresponding to 2.0 mmol/kg) in a control group (n = 3) and in the acute kidney injury group (n = 6) at 1, 3, 7, 14, and 21 days after the damage induction at 7T. Histology assessment of renal damage and blood urea nitrogen levels were compared with pH maps.
during the acute kidney injury, there was a robust increase of pH values, which peaked after 3 days, compared with the predamage situation. In addition, it was possible to detect changes in contrast detection between the different functional regions of the damaged kidneys. Moreover, a slow restoration of normal pH values was observed three weeks after the glycerol injection.
pH appears to be a good parameter to assess the early detection of kidney injury as well as it acts as a reporter of the recovery toward the physiologic functionality. Magn Reson Med 70:859–864, 2013. © 2012 Wiley Periodicals, Inc.