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Longitudinal Assessment of Renal Perfusion and Oxygenation in Transplant Donor-Recipient Pairs Using Arterial Spin Labeling and Blood Oxygen Level-Dependent Magnetic Resonance Imaging
| Content Provider | Scilit |
|---|---|
| Author | Niles, David J. Artz, Nathan S. Djamali, Arjang Sadowski, Elizabeth A. Grist, Thomas M. Fain, Sean B. |
| Copyright Year | 2016 |
| Description | Journal: Investigative radiology |
| Abstract | Objectives The aims of this study were to assess renal function in kidney transplant recipients and their respective donors over 2 years using arterial spin labeling (ASL) and blood oxygen level-dependent (BOLD) magnetic resonance imaging (MRI) and to prospectively evaluate the effect of losartan on functional MRI measures in recipients. Materials and Methods The study included 15 matched pairs of renal transplant donors and recipients. Arterial spin labeling and BOLD MRI of the kidneys were performed on donors before transplant surgery (baseline) and on both donors and recipients at 3 months, 1 year, and 2 years after transplant. After 3 months, 7 of the 15 recipients were prescribed 25 to 50 mg/d losartan for the remainder of the study. A linear mixed-effects model was used to evaluate perfusion, R2*, estimated glomerular filtration rate, and fractional excretion of sodium for changes across time or associated with losartan treatment. Results In donors, cortical perfusion in the remaining kidney decreased by 50 ± 19 mL/min per 100 g (11.8%) between baseline and 2 years (P < 0.05), while cortical R2* declined modestly by 0.7 ± 0.3 s−1 (5.6%; P < 0.05). In transplanted kidneys, cortical perfusion decreased markedly by 141 ± 21 mL/min per 100 g (34.2%) between baseline and 2 years (P < 0.001), while medullary R2* declined by 1.5 ± 0.8 s−1 (8.3%; P = 0.06). Single-kidney estimated glomerular filtration rate increased between baseline and 2 years by 17.7 ± 2.7 mL/min per 1.73 m2 (40.3%; P < 0.0001) in donors and to 14.6 ± 4.3 mL/min per 1.73 m2 (33.3%; P < 0.01) in recipients. Cortical perfusion at 1 and 2 years in recipients receiving 25 to 50 mg/d losartan was 62 ± 24 mL/min per 100 g higher than recipients not receiving the drug (P < 0.05). No significant effects of losartan were observed for any other markers of renal function. Conclusions The results suggest an important role for noninvasive functional monitoring with ASL and BOLD MRI in kidney transplant recipients and donors, and they indicate a potentially beneficial effect of losartan in recipients. |
| Related Links | http://europepmc.org/articles/pmc4697870?pdf=render https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4697870/pdf |
| Ending Page | 120 |
| Page Count | 8 |
| Starting Page | 113 |
| ISSN | 00209996 |
| e-ISSN | 15360210 |
| DOI | 10.1097/rli.0000000000000210 |
| Journal | Investigative radiology |
| Issue Number | 2 |
| Volume Number | 51 |
| Language | English |
| Publisher | Ovid Technologies (Wolters Kluwer Health) |
| Publisher Date | 2016-02-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Investigative radiology Arterial Spin Labeling Mri Blood Oxygen Level-dependent Mri |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging |
