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Breast milk delivery of an engineered dimeric IgA protects neonates against rotavirus.
Mucosal Immunol
January 2025
Weill Cornell Medicine Department of Pediatrics, Division of Infectious Disease, New York, NY, USA. Electronic address:
Dimeric IgA (dIgA) is the dominant antibody in many mucosal tissues. It is actively transported onto mucosal surfaces as secretory IgA (sIgA) which plays an integral role in protection against enteric pathogens, particularly in young children. Therapeutic strategies that deliver engineered, potently neutralizing antibodies directly into the infant intestine through breast milk could provide enhanced antimicrobial protection for neonates.
View Article and Find Full Text PDFIgA class switching enhances neutralizing potency against SARS-CoV-2 by increased antibody hinge flexibility.
Antiviral Res
January 2025
School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China; Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education; Shenzhen Key Laboratory of Pathogenic Microbes and Biosafety. Electronic address:
IgA antibodies are critical components of the mucosal immune barrier, providing essential first-line defense against viral infections. In this study, we investigated the impact of antibody class switching on neutralization efficacy by engineering recombinant antibodies of different isotypes (IgA1, IgG1) with identical variable regions from SARS-CoV-2 convalescent patients. A potent, broad-spectrum neutralizing monoclonal antibody CAV-C65 exhibited a ten-fold increase in neutralization potency upon switching from IgG1 to IgA1 monomer.
View Article and Find Full Text PDFEnhancing quality and yield of recombinant secretory IgA antibodies in Nicotiana benthamiana by endoplasmic reticulum engineering.
Plant Biotechnol J
January 2025
Institute of Plant Biotechnology and Cell Biology, Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna, Austria.
The production of complex multimeric secretory immunoglobulins (SIgA) in Nicotiana benthamiana leaves is challenging, with significant reductions in complete protein assembly and consequently yield, being the most important difficulties. Expanding the physical dimensions of the ER to mimic professional antibody-secreting cells can help to increase yields and promote protein folding and assembly. Here, we expanded the ER in N.
View Article and Find Full Text PDFAlterations in Gut Microbiome-Host Relationships After Immune Perturbation in Patients With Multiple Sclerosis.
Neurol Neuroimmunol Neuroinflamm
March 2025
Yale School of Medicine Department of Neurology, New Haven, CT.
Background And Objectives: Gut microbial symbionts have been shown to influence the development of autoimmunity in multiple sclerosis (MS). Emerging research points to an important relationship between the microbial-IgA interface and MS pathophysiology. IgA-secreting B cells are observed in the MS brain, and shifts in gut bacteria-IgA binding have been described in some patients with MS.
View Article and Find Full Text PDFThe beneficial effect of adding belimumab in severe and refractory IgA nephropathy: a case report.
Pediatr Nephrol
January 2025
Department of Nephrology, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China.
IgA nephropathy (IgAN) is one of the most common primary glomerular diseases worldwide and is the most common cause of chronic kidney disease (CKD) in China. It lacks recommended treatment in refractory IgAN after conventional therapy. Belimumab, a recombinant human IgG-1λ monoclonal antibody that inhibits the B lymphocyte stimulator, is recommended to treat active lupus nephritis.
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