ArticleFrontiers in immunology2021
XAV-19, a Swine Glyco-Humanized Polyclonal Antibody Against SARS-CoV-2 Spike Receptor-Binding Domain, Targets Multiple Epitopes and Broadly Neutralizes Variants.
Article in Frontiers in immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. It is linked to 2 registered trials, which are not on this map. Cited by 10 papers.
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.
A Randomized, Double-blind, Placebo-controlled Phase 2 (2a and 2b) Study to Evaluate the Safety and Efficacy of XAV-19 in Patients With COVID-19 Induced Moderate Pneumonia
An International, Placebo-controlled, Double-blind, Randomized Clinical Trial to Evaluate the Efficacy and Safety of 150 mg XAV-19 Infusion, in Patients With Moderate to Severe COVID-19: the EUROXAV Study
Who cites it
10 citing papers in PubMed, 12 citations in OpenAlex.
- Anti-SARS-CoV-2 glyco-humanized polyclonal antibody XAV-19: phase II/III randomized placebo-controlled trial shows acceleration to recovery for mild to moderate patients with COVID-19.Frontiers in immunology · 2024Trial
- Neutralizing antibody levels as a key factor in determining the immunogenic efficacy of the novel PEDV alpha coronavirus vaccine.The veterinary quarterly · 2025Article
- Current development of severe acute respiratory syndrome coronavirus 2 neutralizing antibodies (Review).Molecular medicine reports · 2024Review
- Effect of Swine Glyco-humanized Polyclonal Neutralizing Antibody on Survival and Respiratory Failure in Patients Hospitalized With Severe COVID-19: A Randomized, Placebo-Controlled Trial.Open forum infectious diseases · 2023Article
- Severe COVID-19: Drugs and Clinical Trials.Journal of clinical medicine · 2023Review
- Seven classes of antiviral agents.Cellular and molecular life sciences : CMLS · 2022Review
- SARS-CoV-2 does not infect pigs, but this has to be verified regularly.Xenotransplantation · 2022Review
- Animal models for studying coronavirus infections and developing antiviral agents and vaccines.Antiviral research · 2022Review
- Coronavirus Disease (COVID-19) Control between Drug Repurposing and Vaccination: A Comprehensive Overview.Vaccines · 2021Review
- Application of the humanized mouse model in research into SARS-CoV-2 infection (Review).Medicine internationalReview
Corrections and comments
- Erratum issued
Authors and funding
17 authors at 8 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Amino acid substitutions and deletions in the Spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants can reduce the effectiveness of monoclonal antibodies (mAbs). In contrast, heterologous polyclonal antibodies raised against S protein, through the recognition of multiple target epitopes, have the potential to maintain neutralization capacities. XAV-19 is a swine glyco-humanized polyclonal neutralizing antibody raised against the receptor binding domain (RBD) of the Wuhan-Hu-1 Spike protein of SARS-CoV-2. XAV-19 target epitopes were found distributed all over the RBD and particularly cover the receptor binding motives (RBMs), in direct contact sites with the angiotensin converting enzyme-2 (ACE-2). Therefore, in Spike/ACE-2 interaction assays, XAV-19 showed potent neutralization capacities of the original Wuhan Spike and of the United Kingdom (Alpha/B.1.1.7) and South African (Beta/B.1.351) variants. These results were confirmed by cytopathogenic assays using Vero E6 and live virus variants including the Brazil (Gamma/P.1) and the Indian (Delta/B.1.617.2) variants. In a selective pressure study on Vero E6 cells conducted over 1 month, no mutation was associated with the addition of increasing doses of XAV-19. The potential to reduce viral load in lungs was confirmed in a human ACE-2 transduced mouse model. XAV-19 is currently evaluated in patients hospitalized for COVID-19-induced moderate pneumonia in phase 2a-2b (NCT04453384) where safety was already demonstrated and in an ongoing 2/3 trial (NCT04928430) to evaluate the efficacy and safety of XAV-19 in patients with moderate-to-severe COVID-19. Owing to its polyclonal nature and its glyco-humanization, XAV-19 may provide a novel safe and effective therapeutic tool to mitigate the severity of coronavirus disease 2019 (COVID-19) including the different variants of concern identified so far.
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Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.