Trial reportThe lancet. HIV2025
Safety, pharmacokinetics, and neutralisation activity of PGDM1400LS, a V2 specific HIV-1 broadly neutralising antibody, infused intravenously or subcutaneously in people without HIV-1 in the USA (HVTN 140/HPTN 101 part A): a first-in-human, phase 1 randomised trial.
Trial report in The lancet. HIV, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
4 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Broadly neutralizing antibodies for HIV therapy in clinical trials: a systematic review.Infectious diseases of poverty · 2026Pooled it
- Safety, pharmacokinetics, and neutralisation activity of PGDM1400LS, VRC07-523LS, and PGT121.414.LS infused intravenously or subcutaneously (HVTN 140/HPTN 101 part B): a phase 1, randomised trial.The lancet. HIV · 2026Trial
- Research progress on HIV-1 structural proteins and antiviral therapies.Frontiers in immunology · 2026Review
- Differences in neutralization susceptibility between clade C HIV viruses from breastmilk versus contemporaneous circulating viruses from sexually acquired infections.bioRxiv : the preprint server for biology · 2025Article
Corrections and comments
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Authors and funding
38 authors.
Funding
Abstract
backgroundPGDM1400LS is a human monoclonal antibody targeting the HIV envelope V2 apex with a lysine-serine modification intended to enhance serum and tissue half-lives and is being considered for use in combination monoclonal antibody trials. We sought to test whether PGDM1400LS was safe and had favourable serum concentration, pharmacokinetics, and neutralising ability in healthy adults.
methodsHVTN 140/HPTN 101 part A is an open-label, dose escalation, first-in-human phase 1 trial of PGDM1400LS given intravenously or subcutaneously to healthy adults aged 18-50 years without HIV-1. The study enrolled participants at four sites in the USA, across five groups, each receiving one dose of PGDM1400-LS intravenously (group 1: 5 mg/kg; group 2: 20 mg/kg; and group 4: 40 mg/kg) or subcutaneously (group 3: 20 mg/kg; and group 5: 40 mg/kg). Participants in group 1 were enrolled sequentially without random assignment. Participants in groups 2 and 3 were block randomised and enrolled simultaneously after group 1 safety review. Groups 4 and 5 followed the same process, contingent on groups 2 and 3 safety review. The primary endpoints were safety and tolerability of PGDM1400LS, serum concentration of PGDM1400LS, and serum neutralising activity after single administration of PGDM1400LS. Serum PGDM1400LS concentrations collected at seven timepoints (day 0, day 3, day 6, day 28, day 56, day 112, and day 168) were assessed via an anti-idiotype binding assay and characterised via non-compartmental pharmacokinetic analysis. Serum neutralisation activity (ID
findingsBetween Nov 15, 2021, and March 4, 2022, 15 participants were enrolled into the five study groups (three participants per group) with 6 months of follow-up. Ten of 15 participants were female, 14 of 15 participants were non-Hispanic, and 11 of 15 participants were White, with a median age of 27 years (range 24-47). PGDM1400LS was safe and well tolerated, with mild to moderate solicited symptoms. Serum concentrations showed dose proportionality by administration route, with peak concentrations observed immediately after intravenous infusion (range 95·7-727·4 μg/mL) or on day 6 after subcutaneous infusion (205·6-547·1 μg/mL). The median elimination half-life was 55 days (range 48-59), representing a 2-to-3-times increase versus parental PDGM1400. Estimated subcutaneous (vs intravenous) bioavailability was 50-60%. ID
interpretationPGDM1400LS is a promising candidate for combination monoclonal antibody efficacy trials going forward.
fundingNational Institute of Allergy and Infectious Diseases-National Institutes of Health.
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