RT Journal Article T1 Development of a G118R mutation in HIV-1 integrase following a switch to dolutegravir monotherapy leading to cross-resistance to integrase inhibitors. A1 Brenner, Bluma G A1 Thomas, Rejean A1 Blanco, Jose Luis A1 Ibanescu, Ruxandra-Ilinca A1 Oliveira, Maureen A1 Mesplede, Thibault A1 Golubkov, Olga A1 Roger, Michel A1 Garcia, Federico A1 Martinez, Esteban A1 Wainberg, Mark A K1 HIV Integrase Inhibitors K1 Heterocyclic Compounds, 3-Ring K1 Oxazines K1 Piperazines K1 Pyridones AB Dolutegravir shows a high barrier to resistance with no previously reported cases of acquired integrase mutations during first-line therapy. In this study, rapid development of the G118R mutation arose following a switch from first-line elvitegravir/cobicistat/tenofovir disoproxil fumarate/emtricitabine to dolutegravir monotherapy. The G118R mutation also arose in a treatment-experienced patient switched to dolutegravir monotherapy. The genetic basis for G118R selection and potential phenotypic outcome was ascertained. Genotypic analysis was performed on patients with virological failure ( We report on two patients who developed viral failure while on dolutegravir monotherapy. Both patients had been on a current or previous regimen containing integrase inhibitors. Virological failure ( Although resistance to dolutegravir is typically rare, genetic polymorphisms and monotherapy can facilitate the acquisition of G118R. PB Oxford University Press YR 2016 FD 2016-02-17 LK http://hdl.handle.net/10668/9956 UL http://hdl.handle.net/10668/9956 LA en NO Brenner BG, Thomas R, Blanco JL, Ibanescu RI, Oliveira M, Mesplède T, et al. Development of a G118R mutation in HIV-1 integrase following a switch to dolutegravir monotherapy leading to cross-resistance to integrase inhibitors. J Antimicrob Chemother. 2016 Jul;71(7):1948-53. NO This work was supported by grants from the Canadian Institutes for HealthResearch (CIHR) and Fonds de Recherche du Que´bec-Sante´ (FRQS)-Re´seauSIDA, and a Large-Scale Applied Research Project in Genomics andPersonalized Health HIV142 contract from Genome Canada to M. W. Thefunders played no decision-making role in the design, execution, and analysis or reporting of the research. DS RISalud RD Apr 7, 2025