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In vitro metabolism of a new cardioprotective agent, KR-33028 in the human liver microsomes and cryopreserved human hepatocytes

  • Hyojin Kim
  • , Yune Jung Yoon
  • , Hyunmi Kim
  • , Eun Young Cha
  • , Suk Lee Hye
  • , Jeong Han Kim
  • , Yang Yi Kyu
  • , Sunkyung Lee
  • , Gyeong Cheon Hyae
  • , Sung Eun Yoo
  • , Sang Seop Lee
  • , Jae Gook Shin
  • , Kwang Hyeon Liu
  • Inje University
  • Wonkwang University
  • Seoul National University
  • Korea Research Institute of Chemical Technology

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

KR-33028 (N-[4-cyano-benzo[b]thiophene-2-carbonyl]guanidine) is a new cardioprotective agent for preventing ischemia-reperfusion injury. This study was performed to identify the metabolic pathway of KR-33028 in human liver microsomes and to compare its metabolism with that of cryopreserved human hepatocytes. Human liver microsomal incubation of KR-33028 in the presence of NADPH and UDPGA resulted in the formation of four metabolites, M1, M2, M3, and M4. M1 and M2 were identified as 5-hydroxy-KR-33028 and 7-hydroxy-KR-33028, respectively, on the basis of LC/MS/MS analysis with the synthesized authentic standard. M3 and M4 were suggested to be dihydroxy-KR-33028 and hydroxy-KR-33028-glucuronide, respectively. Metabolism of KR-33028 in cryopreserved human hepatocytes resulted in the formation of M1, M2, and M4. These data show a good correlation between major metabolites formed in human liver microsomes and cryopreserved human hepatocytes. In addition, KR-33028 was found to inhibit moderately the metabolism of CYP1A2 substrates. Based on the results obtained metabolic pathway of KR-33028 is proposed.

Original languageEnglish
Pages (from-to)1287-1292
Number of pages6
JournalArchives of Pharmacal Research
Volume28
Issue number11
DOIs
StatePublished - Nov 2005

Keywords

  • Hepatocytes
  • KR-33028
  • LC/MS/MS
  • Metabolism
  • Microsomes

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