4CIC 1419 - CIC - Mère Enfant Necker Cochin Paris Centre (Site Hôpital Cochin: 89, rue d'Assas- 75006 PARIS
Site Hôpital Necker: 149 rue de Sèvres- 75743 Paris cedex 15
Site Hôpital Sainte Anne: 1 rue Cabanis- 75014 Paris
Site Maternité Port Royal: 53 avenue de l'observatoire- 75014 PARIS - France)
Abstract : We aimed to describe blood plasma (BP) and seminal plasma (SP) pharmacokinetics of emtricitabine (FTC) in HIV-1-infected men, assess its penetration in the male genital tract, and evaluate its impact on seminal plasma HIV load (spVL) detection. Men from the EVARIST ANRS EP49 study receiving combined antiretroviral therapy with FTC and with suppressed BP viral load were included in the study. A total of 236 and 209 FTC BP and SP concentrations, respectively, were available. A population pharmacokinetic model was developed with Monolix 4.1.4. The impact of FTC seminal exposure on spVL detection was explored by receiver operating characteristic (ROC) curves and mixed-effects logistic regressions. FTC BP pharmacokinetics was described by a two-compartment model. The addition of an effect compartment with different input and output constants best described FTC SP pharmacokinetics. No covariates were found to explain the variability in SP. FTC exposures (area under the concentration-time curve from 0 to 24 h [AUC0-24]) were higher in SP than in BP (median AUC0-24, 38.04 and 12.95 mg · liter(-1) · h, respectively). The median (range) SP-to-BP AUC0-24 ratio was 2.91 (0.84 to 10.08). Less than 1% of FTC AUC0-24 ratios were lower than 1. The impact of FTC SP AUC0-24 or FTC SP-to-BP AUC0-24 ratio on spVL detection was not significant (P = 0.943 or 0.893, respectively). This is the first population model describing FTC pharmacokinetics simultaneously in both BP and SP. FTC distributes well in the male genital tract with higher FTC concentrations in SP than in BP. FTC seminal plasma exposures were considered efficient in the majority of men.
https://www.hal.inserm.fr/inserm-03355196 Contributor : Odile MalbecConnect in order to contact the contributor Submitted on : Monday, September 27, 2021 - 11:13:21 AM Last modification on : Thursday, April 7, 2022 - 1:58:20 PM Long-term archiving on: : Tuesday, December 28, 2021 - 6:22:36 PM
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Elodie Valade, Jean-Marc Tréluyer, Silvia M Illamola, Naïm Bouazza, Frantz Foissac, et al.. Emtricitabine Seminal Plasma and Blood Plasma Population Pharmacokinetics in HIV-Infected Men in the EVARIST ANRS-EP 49 Study. Antimicrobial Agents and Chemotherapy, American Society for Microbiology, 2015, 59 (11), pp.6800 - 6806. ⟨10.1128/aac.01517-15⟩. ⟨inserm-03355196⟩