Efficacy and Durability of Dolutegravir- or Darunavir-Based Regimens in ART-Naïve AIDS- or Late-Presenting HIV-Infected Patients

Effectiveness of dolutegravir-based vs boosted darunavir-based first-line 3-drug regimens in people with HIV with advanced disease: A trial emulation

BACKGROUND

No randomized comparisons exist between dolutegravir (DTG) and boosted-darunavir (DRV/b) for people initiating treatment with advanced HIV.

METHODS

Antiretroviral therapy (ART)-naïve people with HIV (PWH) with CD4 < 200 cells/mm3 or AIDS who started a first-line three-drug regimen with DTG or DRV/b were included. The primary outcome was a composite endpoint of newly diagnosed AIDS, serious non-AIDS events (SNAE), death, virological failure (VF), or discontinuation of the anchor drug due to failure or toxicity. A marginal structural Cox regression model was used to estimate the effect of starting DTG vs DRV/b-based regimens.

RESULTS

A total of 1323 advanced ART-naïve PWH were included, 895 starting DTG and 428 DRV/b. The unweighted risks of the composite endpoint by 48 months were 21.1% (95% CI: 18.1; 24.1%) for DTG vs 37.9% (95% CI: 32.7; 43.2%) for DRV/b (P < 0.001). First-line treatment with DTG showed a lower risk of experiencing the composite endpoint than DRV/b (wHR of DTG vs DRV/b 0.47, 95% CI: 0.35; 0.64, P < 0.001).

CONCLUSION

Under the stated assumptions, this analysis indicates that in ART-naïve PWH with advanced disease, ART initiation with DTG vs DRV/b-based regimens leads to a 50% reduction in the risk of AIDS/SNAE/death/VF/discontinuation. This observed difference is partly explained by discontinuation of the anchor drug.

Evolution of Self-reported Neuropsychiatric Symptoms After Switching from Dolutegravir/Abacavir/Lamivudine to Bictegravir/Emtricitabine/Tenofovir Alafenamide: Results from the Randomized DOBINeuro Trial

INTRODUCTION

Central nervous system adverse events (AE) have been a cause of discontinuation of dolutegravir-containing therapy, especially in combination with abacavir. The main aim of the study was to evaluate whether the switch to bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF) was associated with a reduction in severity and incidence of neuropsychiatric symptoms compared to continued dolutegravir/abacavir/lamivudine (DTG/ABC/3TC).

METHODS

DOBINeuro is a randomized trial enrolling people living with HIV (PLWH) treated with DTG/ABC/3TC for > 6 months and with HIV-RNA < 50 cps/ml for > 12 months. At baseline, PLWH are randomized to continue DTG/ABC/3TC or switch to BIC/FTC/TAF. The original sample size was 50 PLWH per arm, but the enrollment was prematurely stopped due to a delayed recruitment process. Neuropsychiatric symptoms were evaluated by the self-report Symptom Checklist (SCL)-90-R and the Mini-International Neuropsychiatric Interview Plus.

RESULTS

A total of 41 PLWH were enrolled and underwent randomization: 20 were randomized to continue DTG/ABC/3TC and 21 to switch to BIC/FTC/TAF. At baseline, clinical and laboratory characteristics were homogeneous in the two arms. Switching from DTG/ABC/3TC to BIC/FTC/TAF in virologically suppressed PLWH was associated with an improvement in sleep disorders but not in any other neuropsychiatric symptom.

CONCLUSIONS

Although limited by a low sample size, this study suggests neuropsychiatric tolerability may improve when switching virologically suppressed PLWH from DTG to BIC-based strategies.

Cytokines assets in PLWH in two-drug dolutergravir based or three-drug antiretroviral regimen

To minimize the toxicity and impact of combined antiretroviral therapy (cART) on the lifestyle of people living with Human Immunodeficiency Virus (PLWH), scientific community evaluated the efficacy, safety and sustained virologic response of two drugs antiretroviral regimens, in particular dolutegravir (DTG). The effects of deintensification therapy on inflammatory settings are currently unknown in PLWH. Thus, our study explored the inflammatory state in virologically suppressed HIV individuals between patients in treatment with a DTG-containing dual therapy (2DR) versus triple regimen therapies (3DR). We enrolled a total of 116 subjects in 2DRs or 3DRs regimens, and the plasma levels of pro- and anti-inflammatory cytokines (in particular IL-1β, IL-10, IL-18, IL-33, IL-36 and IFN-γ) have been evaluated. CD4 + cell's median value was 729.0 cell/µL in the 3DR group and 771.5 cell/µL in 2DR group; the viral load was negative in all patients. Significant differences were found in levels of IL-18 (648.8 cell/µL in 3DR group vs. 475.0 cell/µL in 2DR group, p = 0.034) and IL-36 (281.7 cell/µL in 3DR group vs. 247.0 cell/µL in 2DR group, p = 0.050), and a correlation between IL-18 and IL-36 was found in 3DR group (rho = 0.266, p = 0.015). This single-center retrospective pharmacological study confirms the absence of significant differences in IL-1β, IL-10, IL-33, and IFN-γ levels between patients on two-drug antiretroviral regimens compared to patients on 3DR antiretroviral regimens. Patients in 2DR show greater control over IL-18 and IL-36 serum levels, cytokines related to an increased cardiovascular risk and development of age-related chronic diseases. Based on our results, we suggest that DTG-based 2DR antiretroviral regimens could be associated with better control of the chronic inflammation that characterizes the population living with HIV in effective ART.

Persistent poor clinical outcomes of people living with HIV presenting with AIDS and late HIV diagnosis - results from the ICONA cohort in Italy, 2009-2022

OBJECTIVES

Limited data are available on the long-term outcomes in recent years for late HIV diagnosis (LD).

METHODS

All subjects with HIV enrolled in the ICONA cohort in 2009-2022 who started antiretroviral treatment (ART) within 4 months from diagnosis were included and divided into: (i) pre-ART CD4 count ≥350/mm3 without AIDS (non-LD), (ii) pre-ART CD4 count <350/mm3 without AIDS (LD asymptomatic), and (iii) with AIDS events pre-ART (LD-AIDS). The estimated probability and independent risk for mortality (all-cause and cause-specific) and treatment failure were evaluated.

RESULTS

Of 6813 participants (2448 non-LD, 3198 LD asymptomatic, and 1167 LD-AIDS), 161 (2.4%) died after ART initiation. At survival analysis, a higher probability of all-cause mortality has been identified for LD than non-LD (P <0.001) and within the former, for LD-AIDS over LD asymptomatic (P <0.001). After adjusting for confounders, LD showed a higher risk of all-cause mortality (vs non-LD adjusted hazard ratio (aHR) 5.51, P <0.001) and, in particular, being an AIDS presenter predicted a greater risk of all-cause (aHR = 4.42, P <0.001), AIDS-related (adjusted subhazard ratio [aSHR] = 16.86, P <0.001), and non-AIDS-related mortality (aSHR = 1.74, P = 0.022) than the rest of the late presenters. Among the short-term survivors in the LD-AIDS group, the long-term mortality was mediated by the lack of immune recovery at 2 years. Finally, LD compared with non-LD and, particularly, among the former, LD-AIDS over LD asymptomatic showed a greater risk of treatment failure.

CONCLUSIONS

In recent years, LD subjects, particularly, AIDS presenters, remained at a higher risk of poorer outcomes. Public health strategies for early HIV diagnosis are urgently needed to constrain the mortality gap.

Special Issue "Efficacy and Safety of Antiviral Therapy"

This comprehensive collection of papers contains a wide range of studies and observations centered on antiviral therapies, with a particular focus on HIV and other viral infections such as monkeypox and SARS-CoV-2 [...].