Title : In vitro studies and in silico predictions of fluconazole and CYP2C9 genetic polymorphism impact on siponimod metabolism and pharmacokinetics.

Pub. Date : 2018 Apr

PMID : 29273968






12 Functional Relationships(s)
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1 SimCYP, a physiologically based PK model, was developed and used to predict the effects of fluconazole and CYP2C9 genetic polymorphism on siponimod metabolism. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
2 RESULTS: Correlation analysis suggested that CYP2C9 is the main enzyme responsible for siponimod metabolism in humans. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
3 Compared with the CYP2C9*1/*1 genotype, HLM incubations from CYP2C9*3/*3 and CYP2C9*2/*2 donors showed ~ 10- and 3-fold decrease in siponimod metabolism, respectively. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
4 Compared with the CYP2C9*1/*1 genotype, HLM incubations from CYP2C9*3/*3 and CYP2C9*2/*2 donors showed ~ 10- and 3-fold decrease in siponimod metabolism, respectively. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
5 Simulations of enzyme contribution predicted that in the CYP2C9*1/*1 genotype, CYP2C9 is predominantly responsible for siponimod metabolism (~ 81%), whereas in the CYP2C9*3/*3 genotype, its contribution is reduced to 11%. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
6 Simulations of enzyme contribution predicted that in the CYP2C9*1/*1 genotype, CYP2C9 is predominantly responsible for siponimod metabolism (~ 81%), whereas in the CYP2C9*3/*3 genotype, its contribution is reduced to 11%. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
7 Simulations of enzyme contribution predicted that in the CYP2C9*1/*1 genotype, CYP2C9 is predominantly responsible for siponimod metabolism (~ 81%), whereas in the CYP2C9*3/*3 genotype, its contribution is reduced to 11%. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
8 The predicted exposure increase of siponimod with fluconazole 200 mg was 2.0-2.4-fold for CYP2C9*1/*1 genotype. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
9 In silico simulation predicted a significant reduction in siponimod clearance in the CYP2C9*2/*2 and CYP2C9*3/*3 genotypes based on the in vitro metabolism data; the predicted exposure was close (within 30%) to the observed results for the CYP2C9*2/*3 and CYP2C9*3/*3 genotypes. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
10 In silico simulation predicted a significant reduction in siponimod clearance in the CYP2C9*2/*2 and CYP2C9*3/*3 genotypes based on the in vitro metabolism data; the predicted exposure was close (within 30%) to the observed results for the CYP2C9*2/*3 and CYP2C9*3/*3 genotypes. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
11 In silico simulation predicted a significant reduction in siponimod clearance in the CYP2C9*2/*2 and CYP2C9*3/*3 genotypes based on the in vitro metabolism data; the predicted exposure was close (within 30%) to the observed results for the CYP2C9*2/*3 and CYP2C9*3/*3 genotypes. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens
12 In silico simulation predicted a significant reduction in siponimod clearance in the CYP2C9*2/*2 and CYP2C9*3/*3 genotypes based on the in vitro metabolism data; the predicted exposure was close (within 30%) to the observed results for the CYP2C9*2/*3 and CYP2C9*3/*3 genotypes. siponimod cytochrome P450 family 2 subfamily C member 9 Homo sapiens