B/F/TAF FDC in HIV-1 Infected Adolescents and Children

• Status: Active, not recruiting
• Trial end date: 2026-07-01
• Target enrollment: 0
• Participant gender: All

Summary

Cohort 1 and 2:

The primary objectives of this study are:

Part A:

• To evaluate the steady state pharmacokinetics (PK) of bictegravir (BIC) and confirm the dose of the bictegravir/emtricitabine/tenofovir alafenamide (B/F/TAF) 50/200/25 mg fixed dose combination (FDC) in HIV-1 infected, virologically suppressed adolescents (12 to < 18 years of age) and children (6 to < 12 years of age)

Parts A and B:

• To evaluate the safety and tolerability of the adult strength B/F/TAF FDC through Week 24 in HIV-1 infected, virologically suppressed adolescents (12 to <18 years of age) and children (6 to <12 years of age)

Cohort 3:

The primary objectives of this study are:

Part A:

• To evaluate the steady state PK of BIC and confirm the dose of B/F/TAF 30/120/15 mg FDC in HIV-1 infected, virologically suppressed children ≥ 2 years of age weighing ≥ 14 to < 25 kg

Parts A and B:

• To evaluate the safety and tolerability of the low dose B/F/TAF FDC tablet through Week 24 in HIV-1 infected, virologically suppressed children ≥ 2 years of age weighing ≥ 14 to < 25 kg

Cohort 4:

Group 1:

The primary objective of this study is:

• To evaluate the safety and tolerability of B/F/TAF 30/120/15 mg FDC TOS (administration of 2 B/F/TAF 15/60/7.5 mg FDC tablets for oral suspension (TOS)) through Week 24 in HIV-1 infected, virologically suppressed children ≥ 2 years of age weighing ≥ 14 to < 25 kg who are unable to swallow tablets

Group 2:

The primary objectives of this study are:

• To evaluate the steady state PK of BIC and TAF and confirm the dose of B/F/TAF 15/60/7.5 mg FDC TOS in HIV-1 infected children ≥ 1 month of age, on antiretroviral (ARV) treatment or treatment naive, weighing ≥ 10 to < 14 kg

• To evaluate the safety and tolerability of the B/F/TAF 15/60/7.5 mg FDC TOS through Week 24 in HIV-1 infected children ≥ 1 month of age, on ARV treatment or treatment naive, weighing ≥ 10 to < 14 kg

Group 3:

The primary objectives of this study are:

• To evaluate the steady state PK of BIC and TAF and confirm the dose of B/F/TAF 7.5/30/3.75 mg FDC TOS (administration of 2 B/F/TAF 3.75/15/1.88 mg FDC TOS) in HIV-1 infected children ≥ 1 month of age, on ARV treatment or treatment naive, weighing ≥ 6 to < 10 kg

• To evaluate the safety and tolerability of B/F/TAF 7.5/30/3.75 mg FDC TOS (administration of 2 B/F/TAF 3.75/15/1.88 mg FDC TOS) through Week 24 in HIV-1 infected children ≥ 1 month of age, on ARV treatment or treatment naive, weighing ≥ 6 to < 10 kg

Group 4:

The primary objectives of this study are:

• To evaluate the steady state PK of BIC and TAF and confirm the dose of B/F/TAF 3.75/15/1.88 mg FDC TOS in HIV-1 infected children ≥ 1 month of age, on ARV treatment or treatment naive, weighing ≥ 3 to < 6 kg

• To evaluate the safety and tolerability of the B/F/TAF 3.75/15/1.88 mg FDC TOS through Week 24 in HIV-1 infected children ≥ 1 month of age, on ARV treatment or treatment naive, weighing ≥ 3 to < 6 kg

• Phase: Phase 2/Phase 3
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Gilead Sciences

Criteria

Key Inclusion Criteria:

Cohort 1: HIV-1 infected adolescents (12 to < 18 years of age and screening weight ≥ 35 kg) who are virologically suppressed for ≥ 6 months prior to screening.

Cohort 2: HIV-1 infected children (6 to < 12 years of age and screening weight ≥ 25 kg) who are virologically suppressed for ≥ 6 months prior to screening.

Cohort 3: HIV-1 infected children (≥ 2 years of age and screening weight of ≥ 14 to < 25 kg) who are virologically suppressed for ≥ 6 months prior to screening.

Cohort 4 Group 1: HIV-1 infected children (≥ 2 years of age and screening weight of ≥ 14 to < 25 kg) who are virologically suppressed for ≥ 6 months prior to screening and unable to swallow tablets.

• Documented plasma HIV-1 RNA < 50 copies/mL on a stable regimen (or undetectable HIV-1 RNA level according to the local assay being used if the limit of detection is ≥ 50 copies/mL) for ≥ 6 months preceding the Screening visit. Unconfirmed virologic elevations of ≥ 50 copies/mL (transient detectable viremia, or "blip") prior to screening are acceptable. If the lower limit of detection of the local HIV-1 RNA assay is < 50 copies/mL (eg, < 20 copies/mL), the plasma HIV-1 RNA level cannot exceed 50 copies/mL on two consecutive HIV-1 RNA tests.

• Stable antiretroviral regimen of 2 nucleoside reverse transcriptase inhibitors (NRTIs) in combination with a third agent for a minimum of 6 months prior to the screening visit. Individuals undergoing dose modifications to their antiretroviral regimen for growth or who are switching medication formulation(s) are considered to be on a stable antiretroviral regimen.

• Estimated glomerular filtration rate (GFR) ≥ 90 mL/min/1.73 m^2 according to the Schwartz Formula

• No documented or suspected resistance to emtricitabine (FTC), tenofovir (TFV), or integrase strand transfer inhibitors (INSTIs) including, but not limited to, the reverse transcriptase resistance mutations K65R and M184V/I

Cohort 4 Group 2-4: HIV-1 infected children (≥ 1 month of age and screening weight of ≥ 3 to < 14 kg) who are treatment naive or on ARV treatment for ≥ 1 month prior to screening

• Positive confirmatory HIV test (confirmatory nucleic acid-based testing if < 18 months of age)

• On a stable ARV regimen for ≥ 1 month or treatment naive (Individual is considered treatment naive if ARVs were given for prevention of mother-to-child transmission but not for HIV treatment)

• For < 1 year of age, eGFR ≥ the minimum normal values for age according to the information below using the Schwartz Formula

• 30 mL/min/1.73 m^2 for age > 2 months to ≤ 95 days

• 39 mL/min/1.73 m^2 for age ≥ 96 days to ≤ 6 months

• 49 mL/min/1.73 m^2 for age > 6 months to < 12 months

• For ≥ 1 year of age, eGFR ≥ 90 mL/min/1.73 m^2 using the Schwartz Formula

• No documented or suspected resistance to FTC, TFV, or INSTIs including, but not limited to, the reverse transcriptase resistance mutation K65R. For individuals < 14 kg, M184V/I AND HIV-1 RNA < 50 copies/mL will be allowed. Individuals with HIV-1 RNA > 50 copies/mL should not have FTC, TFV, or INSTI resistance mutations.

• Last dose of nevirapine (NVP) or efavirenz (EFV), if applicable, ≥ 14 days prior to enrollment

Note: Other protocol defined Inclusion/Exclusion criteria may apply.