Abstract | BACKGROUND: OBJECTIVES: The objective was to measure the impact of telaprevir on RBV bioavailability and to assess the concomitant renal function. MATERIALS AND METHODS: Thirty-seven hepatitis C virus (HCV) patients non-responders to a previous course of PEG-IFN/RBV therapy and re-treated with triple therapy combining PEG-IFN/RBV and telaprevir were analyzed. RBV bioavailability was measured before the triple therapy initiation, during telaprevir treatment at week (W) 4 and W8, and after telaprevir cessation (post W16). The renal function was assessed by estimating the glomerular filtration rate (eGFR). RESULTS: At W4, RBV bioavailability, expressed as mg/L/daily dose/kg body weight, was significantly increased (median increase = 0.06 mg/L/dose/kg; P < 0.001). In parallel, the renal function was impaired with a mean eGFR decrease of -6.8 mL/minutes/1.73 m² (P = 0.109). Between W4 and W8, RBV bioavailability continued to increase (P < 0.001) but subsequently decreased slightly after telaprevir discontinuation with a concomitant restoration of the renal function (eGFR increase of 6.34 mL/minutes/1.73 m²). CONCLUSIONS: Our results indicated a reversible increase in RBV bioavailability after telaprevir exposure, which might be linked to the impairment of the GFR. This also suggests a RBV- telaprevir pharmacological interaction, a possible source of severe anemia observed under triple therapy. These results suggest that RBV pharmacological monitoring may be clinically relevant, especially in the context of first-generation HCV protease inhibitor-based therapy.
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Authors | Pierre Pradat, Victor Virlogeux, Marianne Maynard, Mathilde Leclercq, Giorgiana Hatu, Majid Amiri, Fanny Lebosse, Patrick Miailhes, Fabien Zoulim, Marie-Claude Gagnieu, François Bailly |
Journal | Hepatitis monthly
(Hepat Mon)
Vol. 15
Issue 9
Pg. e28879
(Sep 2015)
ISSN: 1735-143X [Print] Netherlands |
PMID | 26500683
(Publication Type: Journal Article)
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