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Chinese yam polysaccharide induces the differentiation and natural antibody secretion of IgM B cells to prevent Aeromonas hydrophila infection in grass carp.
Int J Biol Macromol
January 2025
National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China. Electronic address:
Chinese yam polysaccharide (CYP) is an effective immunostimulant, however, its efficacy in grass carp, an important commercial fish species in Asia, remains untested. Here, our study evaluated the immunostimulatory effects of CYP on IgM B cells in vitro and on humoral immunity and immune defense against Aeromonas hydrophila infection in vivo. In vitro stimulation experiments showed that CYP could induce the secretion of IgM antibodies, because it could stimulate the proliferation and differentiation of head kidney IgM B cells.
View Article and Find Full Text PDFhemocyanin as a novel natural immunostimulant in mammals.
Front Immunol
January 2025
Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner", (INIBIOLP), Universidad Nacional de La Plata (UNLP) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), La Plata, Argentina.
Introduction: Gastropod hemocyanins are potent immunostimulants in mammals, a trait associated with their large molecular size and unusual glycosylation patterns. While the hemocyanin from the marine snail keyhole limpet (KLH), has been widely studied and successfully employed as a carrier/adjuvant in several immunological applications, as well as a non-specific immunostimulant for bladder cancer treatment, few other gastropod hemocyanins have been biochemically and immunologically characterized. In this work, we investigated the immunogenic properties of the hemocyanin from (PcH), an invasive south American freshwater snail.
View Article and Find Full Text PDFMorpho-functional characterisation of cœlomocytes in the aquacultivated sea cucumber Holothuria scabra: from cell diversity to transcriptomic immune response.
Fish Shellfish Immunol
January 2025
Biology of Marine Organisms and Biomimetics Unit, Research Institute for Biosciences, University of Mons (UMONS), 7000 Mons, Belgium; Laboratory of Cellular and Molecular Immunology, GIGA Research, University of Liège, 4000 Liège, Belgium.
Holothuria scabra is one of the most valuable species of sea cucumber owing to its exploitation as a seafood product. This study aims to describe the main molecular and cellular actors in the immunology of the holothuroid H. scabra.
View Article and Find Full Text PDFImmunogenicity and vaccine efficacy of -derived extracellular vesicles as a novel vaccine candidate.
Virulence
December 2025
Functional Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, Republic of Korea.
(APP) is a significant pathogen in the swine industry, leading to substantial economic losses and highlighting the need for effective vaccines. This study evaluates the potential of APP-derived extracellular vesicles (APP-EVs) as a vaccine candidate compared to the commercial Coglapix vaccine. APP-EVs, isolated using tangential flow filtration (TFF) and cushioned ultracentrifugation, exhibited an average size of 105 nm and a zeta potential of -17.
View Article and Find Full Text PDFBrucella abortus transcriptional regulator ArsR6 inhibits host pyroptosis via BAB_RS28760 by triggering the endoplasmic reticulum stress pathway.
Int Immunopharmacol
February 2025
College of Animal Science and Technology, Shihezi University, Shihezi, China. Electronic address:
Pyroptosis, which is accompanied by inflammatory responses, is critical for pathogen clearance. However, the mechanism through which Brucella evades host pyroptosis remains unclear. The transcriptional regulator ArsR6 maintains bacterial intracellular homeostasis and possibly influences host cell death.
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