Abstract
Aim: The relationship between CYP1A2 polymorphisms and the steady-state plasma levels of aripiprazole and its active metabolite, dehydroaripiprazole, were investigated in Japanese schizophrenic patients.
Background: It has been implied that cytochrome P450 (CYP) 1A2 may play a role in the metabo-lism of aripiprazole. Genetic variations in the CYP1A2 gene have been reported.
Objective: The authors investigated the relationship between 2 CYP1A2 polymorphisms, CYP1A2*C (-3860G>A) and CYP1A2*F (-163C>A), and the steady-state plasma levels/dose (C/D) ratios of aripiprazole and dehydroaripiprazole in Japanese schizophrenic patients.
Methods: All 89 subjects (46 males and 43 females) had been receiving 2 fixed daily doses of aripiprazole (24 mg; n=56 and 12 mg: n=33) for more than 2 weeks. No other drugs were used except flunitrazepam and biperiden. The plasma drug levels were determined by LC/MS/MS. These CYP1A2 polymorphisms were detected using polymerase chain reaction analysis.
Results: The mean C/D ratios of dehydroaripiprazole were significantly (P < 0.05) lower in patients with the A/A allele of CYP1A2*F than in those without the allele. No differences were found in the values of aripiprazole and the combination of aripiprazole and dehydroaripiprazole among the CYP1A2*F genotype. There were no differences in the values of aripiprazole, dehydroaripiprazole, or the combination of the 2 compounds among the CYP1A2*C genotype. The absence of the A allele of CYP1A2*F was correlated with the mean C/D ratios of dehydroaripiprazole (standardized partial correlation coefficient = 0.276, P < 0.01) by multiple regression analysis.
Conclusion: The findings of this study suggest that the CYP1A2*F polymorphism contributes at least partially to the variability in the steady-state plasma levels of dehydroaripiprazole.
Graphical Abstract
[http://dx.doi.org/10.1038/sj.npp.1300203] [PMID: 12784105]
[http://dx.doi.org/10.2174/138920007781368908 ] [PMID: 17691920]
[http://dx.doi.org/10.1097/JCP.0b013e3182356255 ] [PMID: 22020350]
[http://dx.doi.org/10.1097/FTD.0000000000000358 ] [PMID: 27861318]
[http://dx.doi.org/10.1097/FTD.0000000000000070 ] [PMID: 24682161]
[http://dx.doi.org/10.2133/dmpk.20.55 ] [PMID: 15770075]
[http://dx.doi.org/10.1007/s00228-007-0373-6] [PMID: 17828532]
[http://dx.doi.org/10.1111/j.1365-2125.2008.03223.x ] [PMID: 19032724]
[http://dx.doi.org/10.1097/FTD.0b013e3182031021 ] [PMID: 21157400]
[http://dx.doi.org/10.1097/FTD.0b013e31824a31e6 ] [PMID: 22377745]
[http://dx.doi.org/10.1097/FTD.0000000000000018 ] [PMID: 24232129]
[http://dx.doi.org/10.2174/138920008784746373] [PMID: 18537577]
[http://dx.doi.org/10.1097/jcp.0b013e318056f309] [PMID: 17502775]
[http://dx.doi.org/10.1097/FTD.0b013e3181b6326a ] [PMID: 19701114]
[http://dx.doi.org/10.1097/00008571-199508000-00005 ] [PMID: 8528268]
[PMID: 7935325]
[http://dx.doi.org/10.1046/j.1365-2125.2000.00209.x ] [PMID: 10886115]
[http://dx.doi.org/10.1097/00008571-200112000-00005 ] [PMID: 11740341]
[http://dx.doi.org/10.1007/s00228-011-1094-4] [PMID: 21739267]
[http://dx.doi.org/10.2217/14622416.9.5.625 ] [PMID: 18466106]
[http://dx.doi.org/10.1111/bcp.14300] [PMID: 32250470]
[http://dx.doi.org/10.2133/dmpk.22.358] [PMID: 17965519]
[http://dx.doi.org/10.1016/j.jchromb.2005.06.023] [PMID: 16005688]
[http://dx.doi.org/10.1186/1471-2407-12-568] [PMID: 23207012]
[http://dx.doi.org/10.1038/tpj.2009.32] [PMID: 19636338]
[http://dx.doi.org/10.1038/s41397-017-0011-3] [PMID: 29282363]