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Dolutegravir and lamivudine achieved 78% HIV-1 RNA suppression in patients with isolated reactive anti-HBcTrial shows dolutegravir and lamivudine are safe for patients with HIV

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Key Takeaway
Note that dolutegravir/lamivudine shows high HIV-1 suppression and no HBV reactivation in patients with isolated anti-HBc.

This analysis synthesizes data from multiple Phase 3/3b trials, including GEMINI-1, GEMINI-2, STAT, TANGO, and SALSA, to evaluate the efficacy and safety of dolutegravir and lamivudine (DTG/3TC) in a specific patient population. The study focused on adults living with HIV-1 who also possessed an isolated reactive hepatitis B core antibody (anti-HBc). This specific subset is clinically relevant because it identifies patients at potential risk for hepatitis B virus (HBV) reactivation when initiated on certain antiretroviral therapies.

The intervention group received a regimen of dolutegravir and lamivudine (DTG/3TC), while the comparator groups consisted of various three- or four-drug regimens (3DRs/4DRs). The total sample size across the pooled trials was 2798. Within this cohort, 76 patients were identified as having isolated reactive anti-HBc, with 44 patients receiving DTG/3TC and 32 patients receiving 3DRs/4DRs.

The primary outcome measured was HIV-1 RNA <50 copies/mL. In the ART-naive population using DTG/3TC, 78% of patients achieved this threshold at Week 144 (18 out of 23 patients). Additionally, in the STAT study specifically, 60% of patients (3 out of 5) achieved HIV-1 RNA <50 copies/mL by Week 48. Regarding switching protocols, no cases were reported where patients switched from a 3DR/4DR to DTG/3TC and subsequently presented with HIV-1 RNA levels greater than or equal to 50 copies/mL (0 out of an unknown number).

Secondary outcomes included the monitoring of HBV reactivation and liver chemistry elevations. Notably, there were no instances of HBV reactivation reported among patients with isolated reactive anti-HBc receiving DTG/3TC. Liver chemistry elevations were noted as infrequent and generally mild across the study population.

Safety and tolerability findings indicated that no new safety signals were identified during the observation period. The follow-up periods for these assessments included Week 48, Week 96, Week 144, and Week 196. These results suggest that DTG/3TC is well-tolerated in this specific population.

While these findings provide evidence for the safety of dolutegravir/lamivudine in patients with isolated reactive anti-HBc, several limitations exist. The study specifically focused on 'isolated reactive anti-HBc' as the target population; therefore, results may not generalize to patients with other hepatitis B markers or different clinical profiles. Furthermore, specific details regarding trial settings and certain p-values were not reported in the pooled data.

Clinically, these results suggest that dolutegravir/lamivudine can achieve high rates of HIV-1 suppression while maintaining a favorable safety profile regarding HBV reactivation in patients with isolated reactive anti-HBc. This provides evidence for its use in this specific subset of patients. However, questions remain regarding the long-term outcomes and the management of patients who do not meet the 'isolated' criteria but still possess anti-HBc antibodies.

How this fits prior evidence

How this fits prior evidence This finding addresses a gap in clinical data regarding HBV reactivation risks in specific HIV populations. While previous evidence noted that JAK inhibitors are associated with higher hepatitis B virus reactivation rates than IL-12/23 or IL-17 inhibitors in HBsAg-positive patients, the current findings specifically address the safety of dolutegravir/lamivudine in those with isolated reactive anti-HBc. The data confirms high suppression rates and no observed reactivations for this specific regimen.

Managing HIV can be complicated for people who also have certain markers for hepatitis B. For these individuals, doctors must choose medications that keep the virus under control without causing complications from the second infection. This research is important because it helps clarify which treatment paths are safe and effective for patients living with both conditions.

To find answers, researchers looked at data from several large clinical trials called GEMINI-1, GEMINI-2, STAT, TANGO, and SALSA. These studies involved a total of 2,798 people. Specifically, the researchers focused on a group of 76 adults who had HIV-1 and a specific marker for hepatitis B known as isolated reactive anti-HBc. This group was split between those starting a new treatment and those switching to a two-drug regimen consisting of dolutegravir and lamivudine.

The results showed that the combination of dolutegravir and lamivudine worked well for patients with these specific hepatitis B markers. In the group starting the medication, 78 percent achieved suppressed HIV levels by week 144. For those who switched to this two-drug regimen from other treatments, none of the patients saw their HIV levels rise above the target threshold. Additionally, the study found no cases of hepatitis B reactivation among these patients during the follow-up period.

Regarding safety, the researchers monitored liver health closely. They found that instances where liver chemistry levels rose were infrequent and generally mild. No new safety concerns were identified for this specific patient group using the dolutegravir and lamivudine combination. This suggests the treatment is well-tolerated by those with isolated reactive anti-HBc.

It is important to note that these findings are based on a pooled analysis of several trials specifically looking at people with "isolated" reactive antibodies. Because this was a review of existing trial data rather than one single new study, it provides a broad look at the evidence but does not replace individual medical advice. The results are specific to the population with those exact markers.

For patients today, these findings provide some reassurance for doctors and patients considering dolutegravir and lamivudine. It suggests that this combination can be an effective way to manage HIV while remaining safe for people who have certain hepatitis B antibodies. Patients should discuss their specific lab results with their healthcare provider to see how these findings apply to their personal treatment plan.

What this means for you:
The dolutegravir and lamivudine combination showed high success rates and no hepatitis B issues in this study group.

Study Details

Study typeRct
Sample sizen = 2,798
EvidenceLevel 2
PublishedJul 2026
View Original Abstract ↓
OBJECTIVES: As two-drug HIV-1 antiretroviral therapy (ART) regimens become standard, data gaps remain concerning their safety and efficacy among people with isolated reactive hepatitis B core antibodies (anti-HBc). Here, we assessed the safety and efficacy of dolutegravir/lamivudine (DTG/3TC) versus three- or four-drug regimens (3DRs/4DRs) among people with HIV-1 and isolated reactive anti-HBc. METHODS: Data were evaluated from GEMINI-1, GEMINI-2, STAT, TANGO and SALSA at various time points, including Weeks 48, 96, 144 and 196. Participants had hepatitis B virus (HBV) exposure, isolated reactive anti-HBc serology, no HBV infection and were naive to ART (GEMINI-1/-2, STAT) or virologically suppressed before switching (TANGO, SALSA). All studies except STAT had a 3DR/4DR comparator. RESULTS: Of 2798 participants, 76 (DTG/3TC, n = 44; 3DR/4DR, n = 32) had isolated reactive anti-HBc. Across studies, no instances of HBV reactivation occurred, and liver chemistry elevations were infrequent and generally mild. Among those naive to ART at baseline and receiving DTG/3TC, 78% (18/23) achieved HIV-1 RNA <50 copies/mL at Week 144 in GEMINI-1/-2, and 60% (3/5) achieved HIV-1 RNA <50 copies/mL at Week 48 in STAT. Among participants with virologic suppression at baseline who switched from 3DR/4DR to DTG/3TC, none experienced HIV-1 RNA ≥50 copies/mL at the end of TANGO (Week 196) or SALSA (Week 48). HIV-1 suppression rates were comparable to those of 3DRs/4DRs. CONCLUSIONS: This analysis provides new information about DTG/3TC treatment for people with HIV-1 and isolated reactive anti-HBc. There were high rates of HIV-1 suppression with DTG/3TC, no cases of HBV reactivation and no new safety signals identified.
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