Dolutegravir/Abacavir/Lamivudine in Acute HIV-1 Results in Rapid Suppression and Restoration of CD4 T-cell Subsets Without Accelerated Decay of Latent HIV-1.

BACKGROUND

We evaluated rapid start of integrase-based antiretroviral therapy (ART) during acute HIV-1.

METHODS

Adult participants initiated co-formulated dolutegravir/abacavir/lamivudine within 30 days of acute HIV-1 diagnosis. HLA-B*57-positive participants were excluded by rapid, flow cytometry screening. We evaluated HIV-1 RNA levels, CD4+ T-cell subsets, and change in replication competent HIV-1.

RESULTS

Forty adults screened with 3 excluded due to positive HLA-B57:01 or hepatitis B surface antigen results. All 37 participants starting study treatment suppressed to <200 copies/mL by week 24 (median of 4 weeks, interquartile range 3.4-5.1); 86% and 95% were <50 copies/mL at weeks 48 and 96, respectively. We observed a median 2.4-fold decline in frequency of resting CD4+ T-cell infection in a subset of participants providing 96 week samples. ART in acute HIV-1 resulted in CD4+ T-cell memory subpopulations similar to people without HIV-1 and preserved CD4+ and CD8+ T-cell frequencies compared to people starting ART in chronic HIV. Thirty-four participants required rapid HLA-B57 testing at screening; 97% resulted ≤24 hours, and 71% started ART ≤24 hours.

CONCLUSIONS

Integrase-based ART during acute HIV-1 resulted in brisk viral suppression, preservation of CD4+ T-cell subsets, and decline in resting CD4+ T-cell infection.