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In vitro assessment of P-gp and BCRP transporters-mediated drug-drug interactions of riociguat with direct oral anticoagulants.

08:00 EDT 14th August 2019 | BioPortfolio

Summary of "In vitro assessment of P-gp and BCRP transporters-mediated drug-drug interactions of riociguat with direct oral anticoagulants."

As an alternative to vitamin K antagonists (VKAs), direct oral anticoagulants (DOACs) are increasingly prescribed in combination with riociguat in the treatment of chronic thromboembolic pulmonary hypertension (CTEPH). Pharmacokinetics of riociguat and DOACs are influenced by efflux transporters, such as P-glycoprotein (P-gp) and Breast Cancer Resistance Protein (BCRP). This work aimed to assess P-gp and BCRP-mediated drug-drug interactions of riociguat with DOACs using in vitro models. Bidirectional permeabilities of apixaban and rivaroxaban were investigated across MDCK-MDR1 and MDCK-BCRP models, in absence and in presence of increasing concentrations of riociguat (0.5 - 100 μM). Calculated efflux ratios were subsequently used to determine riociguat inhibition percentages and half maximal inhibitory concentration (IC50). P-gp-mediated efflux of apixaban and rivaroxaban were inhibited by 8% and 21% respectively in the presence of 100 μM riociguat. BCRP-mediated transport of apixaban and rivaroxaban were inhibited by 36% and 77% respectively. IC50s of riociguat on MDCK-MDR1 and MDCK-BCRP models were higher than 100 μM for apixaban and higher than 100 μM and 46.5 μM for rivaroxaban, respectively. This work showed an in vitro inhibition of BCRP-mediated DOACs transport by riociguat. In vivo studies may be required to determine the clinical relevance of these transporter-mediated interactions. This article is protected by copyright. All rights reserved.

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Name: Fundamental & clinical pharmacology
ISSN: 1472-8206
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