Trial to Evaluate the Safety and Immunogenicity of Priming Regimens of 426c.Mod.Core-C4b and Optional Boost Regimen With HIV Trimer BG505 SOSIP.GT1.1 gp140, Both Adjuvanted With 3M-052-AF + Alum in Healthy, Adult Participants Without HIV
Public ClinicalTrials.gov record NCT05471076. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase 1 Clinical Trial to Evaluate the Safety and Immunogenicity of Priming Regimens of 426c.Mod.Core-C4b and Optional Boost Regimen With HIV Trimer BG505 SOSIP.GT1.1 gp140, Both Adjuvanted With 3M-052-AF + Alum in Healthy, Adult Participants Without HIV
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The clinical study is designed to evaluate the ability of two priming vaccine regimens to activate and induce the maturation of cross-reactive CD4 binding site (CD4-bs) antibodies, including VRC01-class antibodies. VRC01- class antibodies are highly desirable to elicit via vaccination because they have broad cover all clades of HIV and passive administration of VRC01 monoclonal antibodies has been demonstrated to prevent acquisition of susceptible HIV strains in clinical trials. The study will assess whether B cells expressing VRC01-like B cell receptors proliferate following immunization with a 'germline-targeting' recombinant Env immunogen. The study will also test whether an immunization strategy based upon fractionated dose delivery of the immunogen may improve the maturation of VRC01-class B cells when compared to traditional bolus dosing. In addition, the study will test whether alterations in the dose of the subsequent boost immunizations affects VRC01-class B cell activation and the rate of antibody affinity maturation. The primary hypothesis of the optional boost regimen is that BG505 SOSIP.GT1.1 gp140 adjuvated with 3M-052-AF + Alum is safe and well-tolerated and will further mature B-cell lineages elicited by 426c.Mod.Core-C4b priming regimens.
Study identification
- NCT ID
- NCT05471076
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 1
- Enrollment
- 52 participants
Conditions and interventions
Conditions
Interventions
- 426c.Mod.Core-C4b 30 mcg Biological
- 426c.Mod.Core-C4b 100 mcg Biological
- 426c.Mod.Core-C4b 300 mcg Biological
- Placebo Other
- BG505 Biological
Biological · Other
Eligibility (public fields only)
- Age range
- 18 Years to 55 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 21, 2022
- Primary completion
- Dec 22, 2025
- Completion
- Apr 12, 2026
- Last update posted
- Jul 7, 2026
2022 – 2026
United States locations
- U.S. sites
- 6
- U.S. states
- 6
- U.S. cities
- 6
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Alabama CRS | Birmingham | Alabama | 35222 | — |
| Bridge HIV CRS | San Francisco | California | 94102 | — |
| The Ponce de Leon Center CRS | Atlanta | Georgia | 30308-2012 | — |
| Brigham and Women's Hospital Vaccine CRS (BWH VCRS) | Boston | Massachusetts | 02115-6110 | — |
| Columbia P&S CRS | New York | New York | 10032 | — |
| Seattle Vaccine and Prevention CRS | Seattle | Washington | 98104 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05471076, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 7, 2026 · Synced Sep 2, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05471076 live on ClinicalTrials.gov.