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Malaria: Factors affecting disease severity, immune evasion mechanisms, and reversal of immune inhibition to enhance vaccine efficacy.
PLoS Pathog
January 2025
Malaria Functional Genomics Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Disease, National Institutes of Health, Rockville, Maryland, United States of America.
Malaria is a complex parasitic disease caused by species of Plasmodium parasites. Infection with the parasites can lead to a spectrum of symptoms and disease severity, influenced by various parasite, host, and environmental factors. There have been some successes in developing vaccines against the disease recently, but the vaccine efficacies require improvement.
View Article and Find Full Text PDFAtypical memory B cells from natural malaria infection produced broadly neutralizing antibodies against Plasmodium vivax variants.
PLoS Pathog
January 2025
Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand.
Expansion of atypical memory B cells (aMBCs) was demonstrated in malaria-exposed individuals. To date, the generation of P. vivax-specific aMBCs and their function in protective humoral immune responses is unknown.
View Article and Find Full Text PDFDevelopment of highly sensitive lateral flow immunoassay using PdNPs for detection of Plasmodium species.
Clin Chim Acta
January 2025
ARKRAY Healthcare Pvt. Ltd., Plot No. 336, 338, 340, Rd Number 3, GIDC, Sachin, 394230 Surat, Gujarat, India.
A lateral flow immunoassay (LFIA) employing palladium nanoparticles (PdNPs) labelled with antibodies has been innovatively designed for the precise detection of Plasmodium falciparum pLDH and HRPII antigen. This study focuses on development of LFIA based on PdNPs detection system to substantially enhance the visual detectability (vLOD), achieving an impressive 12 parasites/microliter (p/µl) vLOD in comparison with conventional system represented 50 p/µl vLOD. The research introduces a novel amplification system that not only heightens the sensitivity of LFIA but also maintains intense coloration.
View Article and Find Full Text PDFtranscription factor AP2-06B is mutated at high frequency in Southeast Asia but does not associate with drug resistance.
Front Cell Infect Microbiol
January 2025
National Health Commission Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, China.
Introduction: A continuing challenge for malaria control is the ability of to develop resistance to antimalarial drugs. Members within the transcription factor family AP2 regulate the growth and development of the parasite, and are also thought to be involved in unclear aspects of drug resistance. Here we screened for single nucleotide polymorphisms (SNPs) within the AP2 family and identified 6 non-synonymous mutations within AP2-06B (PF3D7_0613800), with allele frequencies greater than 0.
View Article and Find Full Text PDFValidation of a multiplexed immunoassay for immunological analysis of pre erythrocytic malaria vaccines.
NPJ Vaccines
January 2025
Jenner Institute, University of Oxford, and the NIHR Oxford Biomedical Research Centre, Oxford, OX3 7DQ, UK.
The primary immunological readout for clinical trials of R21/MatrixM™ malaria vaccine, is total IgG antibody specific to the central four amino acid NANP repeat region of the circumsporozoite protein. A multiplexed assay, which includes NANP, was developed and validated for four antigens representing components of the R21 immunogen. Initial assay optimisation included validation of the HBsAg international standard.
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