Testing the antibody BNT351 for safety and effect on HIV in adults
Tests the antibody BNT351 in adults with and without HIV.
Plain-language title generated from the registry record
Registry title: A Clinical Trial Investigating the Safety and Biological Activity of the Antibody BNT351 in Adults Living Without and With HIV
Key facts
- Where
- Cologne and Mannheim, GermanySee the 2 sites
- Phase
- Phase 1
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for adults without HIV (Part A) and adults recently diagnosed with HIV-1 who are not on treatment (Part B) to test the antibody BNT351.
- Age
- 18 to 65 years
- Sex
- All sexes can join.
- Disease stage
- Part B: HIV-1 diagnosed 12 months or less before screening (up to 18 months in some cases agreed with the sponsor's medical monitor), CD4+ T cell count of 500 cells/µL or more, and HIV-1 RNA between 5,000 and 100,000 copies/mL.
- Earlier treatment
- Part B: either never took combination antiretroviral therapy (cART), or stopped it at least 4 weeks before screening. Never took lenacapavir, ibalizumab or fostemsavir, and no other long-acting antiretroviral in the last 6 months. Must be willing to start cART at a set time, 56 days after the dose or earlier.
- Biomarker or test result
- Part A: HIV-1 and HIV-2 negative. Part B: HIV-1 positive and HIV-2 negative.
Main reasons for not taking part
- Had an HIV vaccine or an HIV broadly neutralizing antibody in another study
- Known or suspected immune system problem, or recent immune-affecting medicine such as steroids by mouth or injection (within 60 days)
- History of severe allergy or reaction to antibodies or to BNT351 ingredients
- Part B: treatment for tuberculosis, past AIDS-defining illness, or HIV resistant to three or more drug classes
- Part B: cancer within the last 5 years, with some exceptions
Read by machine on 13 November 2026.
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 65 years old?
Source: NCT07392372, who can take part
Where in Germany
- Universitaetsklinikum Koeln AöRCologne, GermanyTaking people
- CRS Clinical Research Services Mannheim GmbHMannheim, GermanyTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- BioNTech SE
- Trial code
- NCT07392372EU 2025-523846-29-00
- Record updated
- 1 September 2026
- Original description
This study will test the safety and blood levels of the antibody BNT351 in people living without and with human immunodeficiency virus (HIV). This study will also test the anti-viral activity of BNT351 in people living with HIV (PLWH) with detectable virus levels.Read full original descriptionShow less
A Phase I First-in-human Clinical Trial to Evaluate the Safety, Pharmacokinetics, and Antiviral Activity of the Broadly Neutralizing Antibody BNT351 in Adults Living Without and With HIV
This study will test the safety and blood levels of the antibody BNT351 in people living without and with human immunodeficiency virus (HIV). This study will also test the anti-viral activity of BNT351 in people living with HIV (PLWH) with detectable virus levels.
The main goals of this study are:
* To learn about the safety of BNT351 and check for side effects. * To measure the amount of BNT351 antibody in blood over time. * To test the amount of HIV in the blood at different times after treatment with BNT351 in people living with HIV.
Inclusion: Part A:; Are HIV-1 and HIV-2 negative at Visit 0; Starting at Visit 0 and continuously until the last planned visit in this study are individuals who:; Are assessed by the investigator as having a low likelihood of acquiring HIV and are committed to avoiding behaviors associated with a higher likelihood of acquiring HIV until the End of Study Visit; Agree to discuss HIV disease risks; Agree to HIV acquisition risk reduction counseling; Part B:; Are HIV-1 positive and HIV-2 negative at Visit 0; Individuals who at Visit 0:; Are cART-naïve individuals who were diagnosed with HIV-1 infection ≤12 months prior to screening, OR are individuals who have discontinued cART and who were diagnosed with HIV-1 infection ≤12 months prior to screening or ≤18 months if this is found to be acceptable after discussion on a case-by-case basis with the sponsor's medical monitor; If cART-experienced, have discontinued cART for at least 4 weeks before screening (if the individual was taking long-acting antiretroviral therapy [ART]), see the following bullet). For individuals who have discontinued cART: Are able to comply with study procedures and assessments in the investigator's judgment; Have never received lenacapavir or ibalizumab or fostemsavir, and have not received other long-acting ARTs in the last 6 months (i.e., intramuscular cabotegravir, cabotegravir-rilpivirine); Have a CD4+ T cell count of ≥500 cells/µL and plasma HIV-1 RNA levels between 5,000-100,000 copies/mL at screening; Are willing to initiate cART at a protocol-defined timepoint (56 days post-dose, or earlier if meeting early cART start criteria or at investigator's discretion); Are willing to undergo HIV transmission risk reduction counseling and to maintain low-risk behavior to protect their partners.
Exclusion: Have received an HIV vaccination or HIV broadly neutralizing antibody in another clinical study; Have a known or suspected impairment/alteration of immune function or immunodeficiency (except for HIV infection, applicable to Part B only), including receipt of any immunostimulant, immunomodulator, immunosuppressive medication, immunoglobulin, blood product, or oral or parenteral steroid within 60 days prior to Day 1 or planned administration during the study. The following exception applies: Use of inhaled, intranasal, topical, or locally injected corticosteroids (e.g., intraarticular or intrabursal administration) is allowed; Are receiving ongoing therapy for Mycobacterium tuberculosis infection; Have a history of generalized urticaria or angioedema, or of allergy, anaphylaxis, hypersensitivity or intolerance to a human or humanized antibody or to BNT351 excipients; Part B only:; Have a history of opportunistic infections/AIDS-defining illnesses as defined in the protocol; Have a history of multi-class drug resistant HIV-1 infection defined as resistance to three or more classes of HIV drugs; Have a history of malignancy within 5 years before screening. Exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, or a malignancy which is considered in the investigator's judgment to have minimal risk of recurrence. Any malignancy that is an AIDS-defining illness (as defined in the protocol) is exclusionary regardless of the perceived risk of recurrence; NOTE: Other protocol defined inclusion/exclusion criteria apply; Parts A and B:.