HIV breakthrough? antibody cocktail aims to replace daily meds
NCT ID NCT05245292
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This early-stage trial tested whether a single infusion of two long-acting antibodies plus repeated injections of an immune-stimulating drug can keep HIV under control after people stop their daily antiretroviral therapy. Twenty-eight adults with well-controlled HIV participated. The goal was to see if the combination is safe and can delay or prevent the virus from rebounding.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- two broadly neutralizing antibodies (3BNC117-LS and 10-1074-LS) plus an IL-15 superagonist (N-803)
- What this could lead to
- If successful, this could point toward a way for people with HIV to stop daily antiretroviral therapy while keeping the virus under control.
- What could go wrong
- This is a very early, small Phase 1 trial with only 28 participants, so results may not apply widely. The treatment may not prevent viral rebound, and side effects from the antibodies or immune stimulant are possible.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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28 people
The number who actually took part.
- Started
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Dec 2022
- Finished
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Dec 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Male and females, age 18 to 70. 2. Confirmed HIV-1 infection. 3. On antiretroviral therapy with plasma HIV-1 RNA levels of \< 50 copies/ml and no reported interruption of ART for 7 consecutive days or longer for at least 48 weeks, and \< 20 copies/ml at screening. NOTE: At least two Viral Load (VL) measurements within 48 weeks prior to the Step 0 screening visit must be available for review. A single plasma HIV-1 RNA \> 50 copies/mL but \< 200 copies/mL that is followed by an HIV-1 RNA \<50 copies/mL is permitted. 4. Current CD4+ T cell counts \> 450 cells/mcL, CD4+ T cell % ≥ 15%, and CD4+ T cell count nadir of ≥ 200 cells/mcL. 5. If on an NNRTI-based regimen, willing to switch to an integrase inhibitor-based regimen for at least 4 weeks prior to discontinuing ART. 6. For participants who can become pregnant (i.e., participants who have not been post-menopausal for at least 24 consecutive months, who have had menses within the preceding 24 months, or who have not undergone surgical sterilization, specifically hysterectomy and/or bilateral oophorectomy), negative pregnancy test at screening (Step 0) and within 48 hours prior to day 0 (Step 1 entry). 7. Participants who can become pregnant must agree to use two methods of contraception, one of which must be from the highly effective methods for contraception listed below. Barrier methods of contraception are permitted for the second method of contraception. Contraception must be used from 10 days prior to the first of the investigational products (IP), while receiving the IPs, for 12 months after the last IP dose and until ART is reinitiated and viral suppression is achieved. 8. Participants who can impregnate a partner and who are engaging in sexual activity that could lead to pregnancy must agree to use condoms from 10 days prior to the first dose of the investigational products (IP), while receiving the IPs, and for 12 months after the last IP dose to avoid impregnating a partner who can get pregnant. 9. Willingness to use barrier protection (male or female) during sexual activity during analytical treatment interruption (ATI) and until viral re-suppression for those who re-start ART. Exclusion Criteria: 1. History of AIDS-defining illness within 3 years prior to enrollment. 2. History of systemic corticosteroids (e.g. an equivalent dose of prednisone of \> 20 mg daily for \> 14 days), immunosuppressive anti-cancer, interleukins, systemic interferons, systemic chemotherapy or other medications considered significant by the trial physician within the last 6 months. 3. Any clinically significant acute or chronic medical condition (e.g. such as autoimmune diseases, cirrhosis), other than HIV infection, that in the opinion of the investigator would preclude participation. 4. History of or current clinical atherosclerotic cardiovascular disease (ASCVD), as defined by 2013 ACC/AHA guidelines. 5. QTcF interval ≥ 440 ms at screening. 6. Any history of an HIV-associated malignancy, including Kaposi's sarcoma, or any type of lymphoma or virus-associated cancers. 7. History of Progressive Multifocal Leukoencephalopathy (PML). 8. Active or recent non-HIV-associated malignancy requiring systemic chemotherapy or surgery in the preceding 36 months or for whom such therapies are expected in the subsequent 12 months; 9. Hepatitis B or C infection as indicated by the presence of Hepatitis B surface antigen (HBsAg) or hepatitis C virus RNA (HCV-RNA) in blood. 10. Participants with known hypersensitivity to any constituent of the investigational products. 11. Pregnancy or lactation. 12. ART initiated during acute infection (defined as p24, HIV NAAT, or HIV RNA PCR positive, and negative or indeterminate HIV antibody testing). 13. Receipt of cabotegravir-LA IM or rilpivirine-LA IM within 24 months prior to Step 1 study entry. 14. Known resistance to all drugs within two or more ARV drug classes. 15. Laboratory abnormalities in the parameters listed below: * Absolute neutrophil count \< 1,000 cells/microlitre; * Hemoglobin \< 10 gm/dL; * Platelet count \< 100,000 cells/microlitre; * ALT \> 1.5 x ULN; * AST \> 1.5 x ULN; * Total bilirubin \> 1.5 x ULN; * eGFR \< 60 mL/min/1.73m2; 16. Any history of receipt of therapeutic HIV vaccine or HIV monoclonal antibody therapy. 17. Participation in any clinical study of an investigational product within 12 weeks prior to study entry (day 0) or expected participation in such a study during this study.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Perelman School of Medicine University of Pennsylvania
Philadelphia, Pennsylvania, 19104, United States
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The Rockefeller University
New York, New York, 10065, United States
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Weill Cornell Medicine, Cornell Clinical Trials Unit
New York, New York, 10021, United States
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