An Angiotensin Converting Enzyme Inhibitor Suppresses Contrast Media Induced Renal Dysfunction in a Murine Model of Subtotal Nephrectomy
Masahito Ogawa, Jun-ichi Suzuki and Mitsuaki Isobe
Affiliation: Department of Advanced Clinical Science and Therapeutics, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Backgrounds: Contrast media (CM)-induced nephropathy (CIN) affects morbidity and mortality in humans. Although
CIN is mediated by several factors including the renin-angiotensin system (RAS), little is known about the pathophysiology.
To clarify the mechanism, we developed a novel murine CIN model.
Methods: We made 5/6 subtotal nephrectomy (NTX) and administered CM (iopamidol) intravenously into the mice 4
weeks after NTX. Mice received an angiotensin converting enzyme inhibitor (ACEI, n=6), an angiotensin II receptor
blocker (ARB, n=4), or ACEI plus a bradykinin B2 receptor antagonist (Hoe-140, n=5) daily.
Results: Serum creatinine levels were significantly elevated in the NTX group compared to the non-NTX group on day 28.
A day after CM injection, creatinine levels were additionally elevated in the non-treated group. While ACEI treatment
significantly suppressed the creatinine levels, ARB treatment did not decrease the levels. Hoe-140 negated ACEI’s ability
to suppress renal dysfunction.
Conclusion: ACEI treatment may be useful for the prevention of CM-induced nephropathy.
Keywords: Angiotensin converting enzyme, bradykinin, contrast media, murine model, renal dysfunction, renin angiotensin
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