This cohort study examines neutralizing antibodies against the SARS-CoV-2 Omicron variant (BA.1) after the second and third doses of the BNT162b2 mRNA vaccine among Danish adults.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9107029 | PMC |
http://dx.doi.org/10.1001/jamanetworkopen.2022.12073 | DOI Listing |
BMC Infect Dis
December 2024
KEMRI-Wellcome Trust Research Programme, P.O. Box 230, Kilifi, Kenya.
Increased immune evasion by emerging and highly mutated SARS-CoV-2 variants is a key challenge to the control of COVID-19. The majority of these mutations mainly target the spike protein, allowing the new variants to escape the immunity previously raised by vaccination and/or infection by earlier variants of SARS-CoV-2. In this study, we investigated the neutralizing capacity of antibodies against emerging variants of interest circulating between May 2023 and October 2024 using sera from representative samples of the Kenyan population.
View Article and Find Full Text PDFImmunol Rev
December 2024
Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California, USA.
The SARS-CoV-2 spike (S) protein has undergone significant evolution, enhancing both receptor binding and immune evasion. In this review, we summarize ongoing efforts to develop antibodies targeting various epitopes of the S protein, focusing on their neutralization potency, breadth, and escape mechanisms. Antibodies targeting the receptor-binding site (RBS) typically exhibit high neutralizing potency but are frequently evaded by mutations in SARS-CoV-2 variants.
View Article and Find Full Text PDFSci Rep
December 2024
School of Dentistry, University of California Los Angeles, 10833 Le Conte Ave., 73-022 CHS, Los Angeles, CA, 90095-1668, USA.
We developed a 4-parameter clinical assay using Electric Field Induced Release and Measurement (EFIRM) technology to simultaneously assess SARS-CoV-2 RNA (vRNA), nucleocapsid antigen, host binding (BAb) and neutralizing antibody (NAb) levels from a drop of saliva with performance that equals or surpasses current EUA-approved tests. The vRNA and antigen assays achieved lower limit of detection (LOD) of 100 copies/reaction and 3.5 TCID₅₀/mL, respectively.
View Article and Find Full Text PDFAntibodies (Basel)
December 2024
Animal and Human Health Program, International Livestock Research Institute, Nairobi P.O. Box 30709, Kenya.
Background: Immune correlates of protection are ideal tools to predict treatment or vaccine efficacy. However, the accuracy of the immune correlate and the capability to robustly predict the outcome of a vaccine candidate are determined by the performance of the in vitro immunoassay used. Several sporozoite seroneutralization assays have previously been used to assess antibody functional activities; however, a common limitation has been the need for fresh material, target cells and sporozoites, and operator-to-operator bias.
View Article and Find Full Text PDFVirulence
December 2025
The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China.
Live herpesvirus-vectored vaccines are critical in veterinary medicine, but they can sometimes offer insufficient protection due to suboptimal antigen expression or localization. Encephalomyocarditis virus (EMCV) is a significant zoonotic threat, with VP1 protein as a key immunogen on its capsid. To enhance immunogenicity, we explored the use of recombinant pseudorabies virus (rPRV) as a vaccine vector against EMCV.
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