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Switching from a ritonavir-boosted PI to dolutegravir as an alternative strategy in virologically suppressed HIV-infected individuals.

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Background: Switching from PIs to dolutegravir in virologically suppressed HIV-infected individuals has not been assessed.

Methods: This randomized, multicentre study assessed changes in BMD, bone turnover markers, and antiviral efficacy and safety in 73 virologically suppressed patients with osteopenia/osteoporosis taking a ritonavir-boosted PI plus abacavir/lamivudine who were randomized to switch from PI to dolutegravir (DOLU group, n  =   37) or continue with a PI (PI group, n  =   36). Clinical Trials: NCT02577042.

Results: One and three patients from the DOLU and PI groups, respectively, withdrew prematurely (unrelated to treatment). At 48 weeks, 97.3% versus 91.7%, respectively, maintained viral suppression (snapshot analysis, ITT, M = F). No significant differences were seen between the groups in percentage change from baseline to week 48 in femoral ( P  =   0.56) and lumbar spine ( P  =   0.29) BMD, although lumbar spine BMD improved by 1.43% (-1.36; 2.92) in the DOLU group [0.12% (-2.83; 2.89) in the PI group]. Bone marker values did not vary significantly. At week 48, triglycerides were lower ( P    0.001) and HDL cholesterol higher ( P  =   0.027) in the DOLU group.

Conclusion: One and three patients from the DOLU and PI groups, respectively, withdrew prematurely (unrelated to treatment). At 48 weeks, 97.3% versus 91.7%, respectively, maintained viral suppression (snapshot analysis, ITT, M = F). No significant differences were seen between the groups in percentage change from baseline to week 48 in femoral ( P  =   0.56) and lumbar spine ( P  =   0.29) BMD, although lumbar spine BMD improved by 1.43% (-1.36; 2.92) in the DOLU group [0.12% (-2.83; 2.89) in the PI group]. Bone marker values did not vary significantly. At week 48, triglycerides were lower ( P    0.001) and HDL cholesterol higher ( P  =   0.027) in the DOLU group.

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