Mass Spectrometry Letters

Korean Society for Mass Spectrometry (한국질량분석학회)
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Inhibitory effect of honokiol and magnolol on cytochrome P450 enzyme activities in human liver microsomes

  • Joo, Jeongmin (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University) ;
  • Liu, Kwang-Hyeon (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University)
  • Received : 2013.04.09
  • Accepted : 2013.06.27
  • Published : 2013.06.01
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Abstract

Honokiol and magnolol, the major bioactive neolignans of magnolia officinalis, are the most important constituents of the crude drug prescriptions that are used in the therapy of neuroses and various nervous disorders. There have been limited reports on the effects of neolignoid compounds on human cytochrome P450 activity. Therefore, the inhibitory effects of honokiol and magnolol on seven human cytochrome P450 s were evaluated in human liver microsomes. Honokiol and magnolol showed the most potent inhibition of CYP1A2-mediated phenacetin O-deethylase activity ($IC_{50}$ values of 3.5 and 5.4 mM, respectively) among the seven P450s tested. These in vitro data indicate that neolignan compounds can inhibit the activity of CYP1A2 and suggest that these compounds should be examined for potential pharmacokinetic drug interactions in vivo.

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References

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