Comparative analysis at one- and six-months post-vaccination showed modest reduction in S1-RBD IgG antibody and NAb titers against B.1, Alpha, Beta and Delta variants in heterologous and homologous vaccine recipients groups. However, significant reduction in NAb titers against Omicron in vaccinees’ sera post-six months underlines need for cautious prospective follow-up.
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http://dx.doi.org/10.1093/jtm/taac033 | DOI Listing |
Int J Antimicrob Agents
January 2025
Clinical Pharmacology Research Center, Huashan Hospital, Fudan University, Shanghai, China; National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Research ward, Huashan Hospital, Fudan University, Shanghai, China. Electronic address:
Development of neutralizing monoclonal antibody (nAb) is a strategy for treatment of infections caused by SARS-CoV-2. This study evaluated the pharmacokinetics (PK) and pharmacodynamics (PD) of HFB30132A, a fully human nAb targeting SARS-CoV-2 spike protein receptor binding domain, in healthy subjects. Randomized, double-blind, placebo-controlled phase I trial was performed in healthy Chinese and US subjects, respectively.
View Article and Find Full Text PDFPediatr Infect Dis J
November 2024
National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD.
Background: Following maternal COVID-19 vaccination, the persistence of antibodies in sera and breast milk for mothers and infants is not well characterized. We sought to describe the persistence of antibodies through 2 months after delivery in maternal and infant serum and breast milk following maternal COVID-19 mRNA vaccination and to examine differences by receipt of booster dose during pregnancy or postpartum.
Methods: This is a prospective cohort study with enrollment from July 2021 to January 2022 at 9 US academic sites.
Vaccines (Basel)
December 2024
Department of Microbiology, Immunology and Parasitology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA.
Background: A goal of mucosal human immunodeficiency virus type 1 (HIV-1) vaccines is to generate mucosal plasma cells producing polymeric IgA (pIgA)-neutralizing antibodies at sites of viral entry. However, vaccine immunogens capable of eliciting IgA neutralizing antibodies (nAbs) that recognize tier 2 viral isolates have not yet been identified.
Methods: To determine if stabilized native-like HIV-1 envelope (Env) trimers could generate IgA nAbs, we purified total IgA and IgG from the banked sera of six rhesus macaques that had been found in a previous study to develop serum nAbs after subcutaneous immunization with BG505.
Front Immunol
January 2025
Polpharma Biologics S.A., Gdansk, Poland.
Background: Biosimilar natalizumab (biosim-NTZ) is the first biosimilar monoclonal antibody of reference natalizumab (ref-NTZ) for treatment of relapsing forms of multiple sclerosis (MS). Within the totality of evidence for demonstration of biosimilarity, immunogenicity assessments were performed in healthy subjects and patients with relapsing-remitting MS (RRMS) to confirm a matching immunogenicity profile between biosim-NTZ and ref-NTZ.
Methods: Immunogenicity of biosim-NTZ versus ref-NTZ was evaluated in two pivotal clinical studies.
Background: Current HIV prophylactic vaccines evaluate HIV Env as purified proteins. CD40.HIVRI.
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