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Research ArticleArticle

Human Organic Anion Transporters 1 (hOAT1/SLC22A6) and 3 (hOAT3/SLC22A8) Transport Edaravone (MCI-186; 3-methyl-1-phenyl-2-pyrazolin-5-one) and Its Sulfate Conjugate

Naomi Mizuno, Tsuyoshi Takahashi, Yumiko Iwase, Hiroyuki Kusuhara, Takuro Niwa and Yuichi Sugiyama
Drug Metabolism and Disposition August 2007, 35 (8) 1429-1434; DOI: https://doi.org/10.1124/dmd.106.013912
Naomi Mizuno
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Tsuyoshi Takahashi
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Yumiko Iwase
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Hiroyuki Kusuhara
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Takuro Niwa
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Yuichi Sugiyama
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Abstract

3-Methyl-1-phenyl-2-pyrazolin-5-one (MCI-186; edaravone), a novel free radical scavenger, is used for the treatment of acute cerebral infarction. After marketing, a few cases of acute renal failure were reported in patients following treatment with this drug. Because edaravone is mainly excreted into the urine following conjugation to glucuronide or sulfate, the renal excretion mechanisms of edaravone should help provide important information when considering the clinical cases. We examined the transport of edaravone and its sulfate and glucuronide conjugates via human organic anion transporter 1 (hOAT1) and 3 (hOAT3), expressed on the basolateral membranes of proximal tubules. The hOAT1- and hOAT3-transfected human embryonic kidney (HEK)-293 cells exhibited a markedly higher uptake of edaravone sulfate and a slightly higher uptake of edaravone than vector-transfected cells. The Km values of edaravone sulfate uptake by hOAT1 and hOAT3 were 11 and 15 μM, respectively. Estimation of the relative contribution of hOAT1 and hOAT3 using reference compounds suggested that hOAT1 and hOAT3 might contribute to the renal uptake of edaravone sulfate to the same extent. However, edaravone and its sulfate showed no cytotoxicity toward both hOAT1-HEK and control cells, suggesting that higher uptake in hOAT1-HEK did not associate with cytotoxicity of these compounds. In conclusion, our results suggest that both hOAT1 and hOAT3 are responsible for the basolateral uptake of edaravone sulfate in the kidney.

Footnotes

  • Article, publication date, and citation information can be found at http://dmd.aspetjournals.org.

  • doi:10.1124/dmd.106.013912.

  • ABBREVIATIONS: edaravone, MCI-186, 3-methyl-1-phenyl-2-pyrazolin-5-one; hOAT, human organic anion transporter; PAH, p-aminohippuric acid; PCG, benzylpenicillin; OAT, organic anion transporter(s); HEK, human embryonic kidney; RAF, relative activity factor.

    • Received December 10, 2006.
    • Accepted May 10, 2007.
  • The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 35 (8)
Drug Metabolism and Disposition
Vol. 35, Issue 8
1 Aug 2007
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Human Organic Anion Transporters 1 (hOAT1/SLC22A6) and 3 (hOAT3/SLC22A8) Transport Edaravone (MCI-186; 3-methyl-1-phenyl-2-pyrazolin-5-one) and Its Sulfate Conjugate
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Research ArticleArticle

Human Organic Anion Transporters 1 (hOAT1/SLC22A6) and 3 (hOAT3/SLC22A8) Transport Edaravone (MCI-186; 3-methyl-1-phenyl-2-pyrazolin-5-one) and Its Sulfate Conjugate

Naomi Mizuno, Tsuyoshi Takahashi, Yumiko Iwase, Hiroyuki Kusuhara, Takuro Niwa and Yuichi Sugiyama
Drug Metabolism and Disposition August 1, 2007, 35 (8) 1429-1434; DOI: https://doi.org/10.1124/dmd.106.013912

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Research ArticleArticle

Human Organic Anion Transporters 1 (hOAT1/SLC22A6) and 3 (hOAT3/SLC22A8) Transport Edaravone (MCI-186; 3-methyl-1-phenyl-2-pyrazolin-5-one) and Its Sulfate Conjugate

Naomi Mizuno, Tsuyoshi Takahashi, Yumiko Iwase, Hiroyuki Kusuhara, Takuro Niwa and Yuichi Sugiyama
Drug Metabolism and Disposition August 1, 2007, 35 (8) 1429-1434; DOI: https://doi.org/10.1124/dmd.106.013912
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