Real-world implementation of dolutegravir plus lamivudine in people living with HIV in Southwest China

Effectiveness, Weight Changes, and Metabolic Outcomes on Switch to Generic Dolutegravir/Lamivudine Among People with HIV in Western India: An Observational Study

We assessed the effectiveness and safety of switching to generic dolutegravir/lamivudine (DTG/3TC) among People living with Human Immunodeficiency Virus (PWH) in Western India. In this single-center, retrospective observational study, PWH, who switched to DTG/3TC, were followed for virologic, immunologic, and clinical effectiveness, and safety, including weight changes, hyperglycemia, and dyslipidemia. Multivariate linear mixed-effects models were used to predict average change in weight adjusted for age, sex, duration of previous antiretroviral (ARV) regimens, and baseline weight. From May 2017 to July 2022, out of 434 PWH switched to DTG/3TC, 304 with at least 1 follow-up visit were included. Median [interquartile range (IQR)] age was 54 (IQR 49-61) years and 70.1% were male. Prevalence of baseline comorbidities was 57.9% (hypertension-41.5%, chronic kidney disease-40.9%, and diabetes mellitus-18.8%). Reasons for switch were affordability (47.4%), desire for simplification (41.8%), ARV toxicities (19.1%), and concern about potential toxicities (10.2%). Median (IQR) duration of follow-up on DTG/3TC was 40 (IQR 31-49) weeks. No virologic failure was observed. Rates of virologic suppression [viral load (VL) ≤20 copies/mL or target not detected (TND)] at 12, 24, 48, 72, 96 and 120 weeks were 95.2%, 95.9%, 90%, 100%, 81.3%, and 88.4%, respectively. Only 9 (3%) PWH permanently discontinued DTG/3TC. Predicted adjusted mean weight gain of +3.3 kg was observed at 96 weeks. Switching from tenofovir disoproxil fumarate (TDF)/emtricitabine or lamivudine (XTC)/non-nucleoside reverse transcriptase inhibitor (NNRTI) and duration on DTG/3TC were significantly associated with weight gain. Apart from trend in worsening hyperglycemia (nine PWH with new onset diabetes), no clinically significant change in lipids and estimated glomerular filtration rate (eGFR) was documented. Switching to DTG/3TC is an effective and safe option among virologically suppressed PWH with high comorbidity burden in India. In view of the several advantages of DTG/3TC, it may be considered for potential scale-up in the right population, both in private and public health care settings in India.

Dolutegravir/Lamivudine versus Tenofovir Alafenamide/Emtricitabine/Bictegravir as a Switch Strategy in a Real-Life Cohort of Virogically Suppressed People Living with HIV

BACKGROUND

The aim of the study is to evaluate the effectiveness, safety, and tolerability of a two-drug regimen (2-DR) dolutegravir/lamivudine (DTG/3TC) versus a three-drug regimen (3-DR) tenofovir alafenamide/emtricitabine/bictegravir (TAF/FTC/BIC) in a real-life cohort of HIV-1 virologically suppressed treatment-experienced (TE) people living with HIV (PLWH).

METHODS

This was a single-center, retrospective, observational study analyzing adult TE PLWH who started the 2-DR or 3-DR between January 2018 and January 2023. All PLWH with a viral load (VL) <50 copies/mL at the time of switching, and a follow-up of more than 6 months or interruption of treatment at any time, were included.

RESULTS

A total of 324 PLWH were included; of these, 110 (34%) were on the 2-DR and 214 (66%) were on the 3-DR. Most patients remained on therapy in both groups (93.6% 2-DR versus 90.2% 3-DR) and, at the last control, 99.1% achieved VL < 50 copies/mL with the 2-DR versus 97.2% with the 3-DR (p = 0.260). No virological failures occurred in either group. Adverse events occurred in a few cases: four (3.6%) in the 2-DR group and five (2.3%) in the 3-DR group (p = 0.500). The median follow-up-time was 19.6 months for the 2-DR and 27.5 months for the 3-DR.

CONCLUSION

Our study shows a similar effectiveness and safety profile in virologically suppressed PLWH switching to DTG/3TC or TAF/FTC/BIC.

Bictegravir/Emtricitabine/Tenofovir Alafenamide Versus Dolutegravir Plus Lamivudine for Switch Therapy in Patients with HIV-1 Infection: A Real-World Cohort Study

INTRODUCTION

Bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF) and dolutegravir plus lamivudine (DTG + 3TC) are well tolerated and effective in clinical trials. This study aimed to evaluate the safety and efficacy of these two schemes in a real-world setting and to obtain the first dataset for switching to BIC/FTC/TAF and DTG + 3TC in a Chinese population.

METHODS

This retrospective single-center cohort study in China included participants who switched to DTG + 3TC or BIC/FTC/TAF between January 2020 and February 2023. The main endpoint was the proportion of participants with HIV-1 RNA levels of ≥ 50 copies/mL. Safety, tolerance, and the incidence of low-level viremia (LLV) were evaluated.

RESULTS

A total of 525 participants were included, 454 of whom were included in the PP analysis. At week 48, the proportions of participants with HIV-1 RNA ≥ 50 copies/mL were 4.4% (10/225) for DTG + 3TC and 6.1% (14/229) for BIC/FTC/TAF; virological efficacy did not differ significantly between the two groups. Consistent results were obtained in an intent-to-treat (ITT) analysis. The incidences of LLV were 3.6% (7/193) and 4.9% (10/206), respectively. During the study, none of the participants stopped taking drugs because of a lack of efficacy or adverse reactions.

CONCLUSIONS

Both regimens are well tolerated and effective for switching HIV-1 infection therapy. However, the detection of genotypic drug resistance should be considered when baseline virological non-suppression is observed.