title: The Effect of Vinpocetine on Human Cytochrome P450 Isoenzymes by Using a Cocktail Method.
abstract: Vinpocetine is a derivative of the alkaloid vincamine, which had been prescribed for chronic cerebral vascular ischemia and acute ischemic stroke or used as a dietary supplement for its several different mechanisms of biological activities. However, information on the cytochrome P450 (CYP) enzyme-mediated drug metabolism has not been previously studied. The present study was performed to investigate the effects of vinpocetine on CYPs activity, and cocktail method was used, respectively. To evaluate the effects of vinpocetine on the activity of human CYP3A4, CYP2C9, CYP2C19, CYP2D6, and CYP2E1, human liver microsomes were utilized to incubate with the mixed CYPs probe substrates and the target components. The results indicate that vinpocetine exhibited weak inhibitory effect on the CYP2C9, where the IC50 value is 68.96 μM, whereas the IC50 values for CYP3A4, CYP2C19, CYP2D6, and CYP2E1 were all over range of 100 μM, which showed that vinpocetine had no apparent inhibitory effects on these CYPs. In conclusion, the results indicated that drugs metabolized by CYP2C9 coadministrated with vinpocetine may require attention or dose adjustment.
authors.affiliation: Department of Pharmacy, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
authors.forename: Lingti
authors.initials: L
authors.lastname: Kong
authors.affiliation: Department of Pharmacy, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
authors.forename: Chunli
authors.initials: C
authors.lastname: Song
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China; Department of Pharmacy, The First People's Hospital of Bijie, Bijie 551700, China.
authors.forename: Linhu
authors.initials: L
authors.lastname: Ye
authors.affiliation: Department of Pharmacy, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
authors.forename: Daohua
authors.initials: D
authors.lastname: Guo
authors.affiliation: Department of Pharmacy, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
authors.forename: Meiling
authors.initials: M
authors.lastname: Yu
authors.affiliation: Department of Pharmacy, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Xing