Category Ranking

98%

Total Visits

921

Avg Visit Duration

2 minutes

Citations

20

Article Abstract

The RTS,S/AS02A malaria vaccine is based on the Plasmodium falciparum circumsporozoite protein (PfCSP), which is O-fucosylated on the sporozoite surface. We determined whether RTS,S/AS02A-induced immunoglobulin G (IgG) antibodies recognize vaccine-like nonfucosylated PfCSP better than native-like fucosylated PfCSP. Similar to previous vaccine trials, RTS,S/AS02A vaccination induced high anti-PfCSP IgG levels associated with malaria protection. IgG recognition of nonfucosylated and fucosylated PfCSP was equivalent, suggesting that PfCSP fucosylation does not affect antibody recognition. Clinical Trials Registration. NCT00197041.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11491836PMC
http://dx.doi.org/10.1093/infdis/jiad471DOI Listing

Publication Analysis

Top Keywords

rtss/as02a malaria
8
native-like fucosylated
8
plasmodium falciparum
8
falciparum circumsporozoite
8
fucosylated pfcsp
8
pfcsp
5
malaria vaccine-induced
4
igg
4
vaccine-induced igg
4
igg responses
4

Similar Publications

Aim: The review summarizes the recent empirical evidence on the efficacy, safety, and community perception of malaria vaccines in Africa.

Methods: Academic Search Complete, African Journals Online, CINAHL, Medline, PsychInfo, and two gray literature sources were searched in January 2023, and updated in June 2023. Relevant studies published from 2012 were included.

View Article and Find Full Text PDF

The RTS,S/AS02A malaria vaccine is based on the Plasmodium falciparum circumsporozoite protein (PfCSP), which is O-fucosylated on the sporozoite surface. We determined whether RTS,S/AS02A-induced immunoglobulin G (IgG) antibodies recognize vaccine-like nonfucosylated PfCSP better than native-like fucosylated PfCSP. Similar to previous vaccine trials, RTS,S/AS02A vaccination induced high anti-PfCSP IgG levels associated with malaria protection.

View Article and Find Full Text PDF

Transcriptional changes induced by candidate malaria vaccines and correlation with protection against malaria in a human challenge model.

Vaccine

September 2015

London School of Hygiene & Tropical Medicine, London W1CE 7HT, UK; The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Churchill Hospital, Oxford OX3 7LJ, UK.

Introduction: The complexity of immunity to malaria is well known, and clear correlates of protection against malaria have not been established. A better understanding of immune markers induced by candidate malaria vaccines would greatly enhance vaccine development, immunogenicity monitoring and estimation of vaccine efficacy in the field. We have previously reported complete or partial efficacy against experimental sporozoite challenge by several vaccine regimens in healthy malaria-naïve subjects in Oxford.

View Article and Find Full Text PDF

RTS,S malaria antigen is weakly immunogenic as such and needs to be formulated with an adjuvant to improve the magnitude and duration of the immune responses to RTS,S. Two Adjuvant Systems, AS01 and AS02 were evaluated during the development of the RTS,S vaccine. The evaluation included non-clinical studies in rabbits to evaluate the local intramuscular tolerance following administration on a single occasion, and the local and systemic effects following repeated administrations of RTS,S/AS01 or RTS,S/AS02 formulations.

View Article and Find Full Text PDF

This phase II, randomized, double-blind study evaluated the immunogenicity of RTS,S vaccines containing Adjuvant System AS01 or AS02 as compared with non-adjuvanted RTS,S in healthy, malaria-naïve adults (NCT00443131). Thirty-six subjects were randomized (1:1:1) to receive RTS,S/AS01, RTS,S/AS02, or RTS,S/saline at months 0, 1, and 2. Antibody responses to Plasmodium falciparum circumsporozoite (CS) and hepatitis B surface (HBs) antigens were assessed and cell-mediated immune responses evaluated by flow cytometry using intracellular cytokine staining on peripheral blood mononuclear cells.

View Article and Find Full Text PDF