The drug efflux transporter permeability glycoprotein (PGP) and cytochrome P450 (CYP) 2C19 are important for eliminating antidepressants from the brain and body. The ABCB1 gene, encoding for PGP, and CYP2C19 gene have several variants that could influence enzyme function and thereby the effect of PGP- and 2C19-dependent antidepressants. We investigated the association of antidepressant side effect and common genetic variation in 789 antidepressant users. In PGP-dependent antidepressant users, the A-allele of the rs2032588 single-nucleotide polymorphism (SNP) was associated with a lower number of side effects after adjusting for gender, age, dosage and duration of use, (B=-0.44, q=4.6 × 10(-3)). This association was different from and absent in non-PGP-dependent antidepressant users. Other SNP associations as well as an interaction analysis between the rs2032588 SNP and the CYP2C19 SNPs were not statistically significant after adjusting for covariates and multiple comparisons. The association of rs2032588 with antidepressant side effects suggests the involvement of the ABCB1 genotype in the clinical pharmacology of PGP-dependent antidepressants.
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| http://dx.doi.org/10.1038/tpj.2015.38 | DOI Listing |
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