Kevin K Ariën1, Muthusamy Venkatraj2, Johan Michiels3, Jurgen Joossens2, Katleen Vereecken3, Pieter Van der Veken2, Jan Heeres2, Hans De Winter2, Leo Heyndrickx3, Koen Augustyns2, Guido Vanham4. 1. Department of Biomedical Sciences, Institute of Tropical Medicine, B-2000 Antwerp, Belgium karien@itg.be. 2. Laboratory of Medicinal Chemistry, University of Antwerp, B-2000 Antwerp, Belgium. 3. Department of Biomedical Sciences, Institute of Tropical Medicine, B-2000 Antwerp, Belgium. 4. Department of Biomedical Sciences, Institute of Tropical Medicine, B-2000 Antwerp, Belgium Department of Biomedical Sciences, University of Antwerp, B-2000 Antwerp, Belgium.
Abstract
OBJECTIVES: The resistance development, cross-resistance to other NNRTIs and the impact of resistance on viral replicative fitness were studied for the new and potent NNRTI UAMC01398. METHODS: Resistance was selected by dose escalation and by single high-dose selection against a comprehensive panel of NNRTIs used as therapeutics and NNRTIs under investigation for pre-exposure prophylaxis of sexual HIV transmission. A panel of 27 site-directed mutants with single mutations or combinations of mutations involved in reverse transcriptase (RT) inhibitor-mediated resistance was developed and used to confirm resistance to UAMC01398. Cross-resistance to other NNRTIs was assessed, as well as susceptibility of UAMC01398-resistant HIV to diarylpyrimidine-resistant viruses. Finally, the impact of UAMC01398 resistance on HIV replicative fitness was studied. RESULTS: We showed that UAMC01398 has potent activity against dapivirine-resistant HIV, that at least four mutations in the RT are required in concert for resistance and that the resistance profile is similar to rilpivirine, both genotypically and phenotypically. Resistance development to UAMC01398 is associated with a severe fitness cost. CONCLUSIONS: These data, together with the enhanced safety profile and good solubility in aqueous gels, make UAMC01398 an excellent candidate for HIV topical prevention.
OBJECTIVES: The resistance development, cross-resistance to other NNRTIs and the impact of resistance on viral replicative fitness were studied for the new and potent NNRTI UAMC01398. METHODS: Resistance was selected by dose escalation and by single high-dose selection against a comprehensive panel of NNRTIs used as therapeutics and NNRTIs under investigation for pre-exposure prophylaxis of sexual HIV transmission. A panel of 27 site-directed mutants with single mutations or combinations of mutations involved in reverse transcriptase (RT) inhibitor-mediated resistance was developed and used to confirm resistance to UAMC01398. Cross-resistance to other NNRTIs was assessed, as well as susceptibility of UAMC01398-resistant HIV to diarylpyrimidine-resistant viruses. Finally, the impact of UAMC01398 resistance on HIV replicative fitness was studied. RESULTS: We showed that UAMC01398 has potent activity against dapivirine-resistant HIV, that at least four mutations in the RT are required in concert for resistance and that the resistance profile is similar to rilpivirine, both genotypically and phenotypically. Resistance development to UAMC01398 is associated with a severe fitness cost. CONCLUSIONS: These data, together with the enhanced safety profile and good solubility in aqueous gels, make UAMC01398 an excellent candidate for HIV topical prevention.
Authors: Ignacio Rodríguez-Izquierdo; Daniel Sepúlveda-Crespo; Jose María Lasso; Salvador Resino; Ma Ángeles Muñoz-Fernández Journal: Wiley Interdiscip Rev Nanomed Nanobiotechnol Date: 2022-01-12