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Chemically induced analgesic nephropathy in the rat monitored by proton‐electron double‐resonance imaging (PEDRI)
Author(s) -
Seimenis Ioannis,
Foster Margaret A.,
Lurie David J.,
Hutchison James M. S.,
Whiting Paul H.,
Payne Simon
Publication year - 1998
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910400214
Subject(s) - kidney , analgesic , chemistry , magnetic resonance imaging , nephropathy , medulla , renal function , medicine , pathology , nuclear magnetic resonance , anesthesia , endocrinology , radiology , physics , diabetes mellitus
Proton‐electron double‐resonance imaging (PEDRI) was used to assess renal function by monitoring the flow of the exogenous nitroxide free radical proxyl carboxylic acid (PCA) through normal and injured kidneys in the living rat. Kidney damage was induced by treatment with 2‐bromoethylamine (BEA), which provides a well established model for human analgesic nephropathy. PCA clearance rates for liver, abdominal blood vessels, and renal tissues were determined from serial PEDRI images of normal rats ( n = 6) and rats treated with BEA ( n = 21). Different groups of BEA‐treated animals were imaged on day 4 ( n = 6), day 6 ( n = 6), and day 9 ( n = 9) after treatment. In BEA‐treated rats, there was an increase in PCA half‐life in all tissues studied. This increase was greatest in the kidney tissues and the effect progressed with time after treatment. The effect is probably due to BEA‐induced damage to the tubules in the renal cortex and may not be related to the primary lesions in the renal medulla.