Loss of Function ABCG2 c.421C>A (rs2231142) Polymorphism Increases Steady-State Exposure to Mycophenolic Acid in Stable Renal Transplant Recipients: An Exploratory Matched Cohort Study.

Introduction: Polymorphism ABCG2 c.421C>A (rs2231142) results in reduced activity of the important drug efflux transporter breast cancer-resistance protein (BCRP/ABCG2). One study has suggested that it may affect enterohepatic recirculation of mycophenolic acid (MPA).

Development and Validation of an HPLC Method for Simultaneous Determination of Capsaicinoids and Camphor in Over-the-Counter Medication for Topical Use.

A reverse-phase high-performance liquid chromatography method was developed to determine and quantify capsaicin (-8-methyl-N-vanillyl-6- nonenamid), dihydrocapsaicin (8-methyl-N-vanillylnonanamide), and camphor (trimethylbicyclo[2.2.1]heptan-2-one).

Effect of cyclosporine on steady-state pharmacokinetics of MPA in renal transplant recipients is not affected by the MPA formulation: analysis based on therapeutic drug monitoring data.

Background: Two oral mycophenolic acid (MPA) formulations, immediate-release mycophenolate mofetil and enteric-coated mycophenolate sodium, have been shown to differ regarding some drug-drug interactions. The aim was to assess whether the effects of cyclosporine (CsA) on steady-state pharmacokinetics (PK) of MPA in renal transplant patients were affected by MPA formulation.

Methods: A prospective, stratified observational study based on therapeutic drug monitoring of MPA (6 total plasma concentrations over a 12-hour dosing interval, τ) in consecutive stable adult renal transplant recipients (n = 68).

Association between lamotrigine concentrations and ABCB1 polymorphisms in patients with epilepsy.

Background: Epilepsy is treated with a variety of anticonvulsants that are often used concomitantly. Therefore, therapeutic drug monitoring is often necessary. Along with clinical and environmental factors, genetic predisposition has been recognized to be relevant for interindividual variability in drug response.

Genetic polymorphisms of cytochromes P450: CYP2C9, CYP2C19, and CYP2D6 in Croatian population.

Aim: To determine the prevalence of most common mutations of cytochrome P450 (CYP), ie, allelic variants of CYP2C9, CYP2C19, and CYP2D6, and to predict genotype frequency in the Croatian population.

Methods: CYP genotype was determined in 200 non-related Croatian citizens. DNA isolated from blood samples was used for the analysis of the most common allelic variants of CYP2C9, CYP2C19, and CYP2D6 by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.