The effect of orally feeding 15000 I.U. of vitamin A during 15 days to male rats of the Wistar strain was studied on the sialic acid and hexosamine contents of the salivary glands. Sialic acid and hexosamine contents in the submandibular and sublingual salivary glands showed a decrease while those for the parotid salivary gland did not alter.
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Nat Commun
December 2024
Center for Vaccines and Immunology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.
Parainfluenza virus 3 (PIV3) infection poses a substantial risk to vulnerable groups including infants, the elderly, and immunocompromised individuals, and lacks effective treatments or vaccines. This study focuses on targeting the hemagglutinin-neuraminidase (HN) protein, a structural glycoprotein of PIV3 critical for viral infection and egress. With the objective of targeting these activities of HN, we identified eight neutralizing human monoclonal antibodies (mAbs) with potent effects on viral neutralization, cell-cell fusion inhibition, and complement deposition.
View Article and Find Full Text PDFFront Immunol
December 2024
School of Biosciences and Bio21 Molecular Science and Biotechnology Institute, Faculty of Science, The University of Melbourne, Melbourne, VIC, Australia.
Seminal fluid provides for the carriage and nutrition of sperm, but also modulates immunity to prevent allo-rejection of sperm by the female. Immune suppression by seminal fluid has been associated with extracellular vesicles, originally termed prostasomes, which contain CD52, a glycosylated glycophosphoinositol-anchored peptide released from testicular epithelial cells. Previously, we reported that human T cell-derived CD52, bound to the danger-associated molecular pattern protein, high mobility group box 1 (HMGB1), suppresses T cell function via the inhibitory sialic acid-binding immunoglobulin-like lectin-10 (Siglec-10) receptor.
View Article and Find Full Text PDFVirol Sin
December 2024
Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea. Electronic address:
Influenza, a highly contagious respiratory infectious disease caused by an influenza virus, is a threat to public health worldwide. Avian influenza viruses (AIVs) have the potential to cause the next pandemic by crossing the species barrier through mutation of viral genome. Here, we investigated the pathogenicity of AIVs obtained from South Korea and Mongolia during 2018-2019 by measuring viral titers in the lungs and extrapulmonary organs of mouse models.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
International Joint Research Laboratory for Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, Henan, China; School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, Henan, China. Electronic address:
Chinese hamster ovary (CHO) cells are the most widely used platform for recombinant therapeutic protein (RTP) production. Traditionally, the development of CHO cell lines has mainly depended on random integration of transgenes into the genome, which is not conducive to stable long-term expression. Cytidine monophosphate N-acetylneuraminic acid hydroxylase (CMAH) is expressed in CHO cells and produces N-hydroxyacetylneuraminic acid, which may cause a human immune response.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India. Electronic address:
Sialic acid, a negatively charged nine-carbon monosaccharide, is mainly located at the terminal end of glycan chains on glycoproteins and glycolipids of cell surface and most secreted proteins. Elevated levels of sialylated glycans have been known as a hallmark in numerous cancers. As a result, sialic acid acts as a useful and accessible cancer biomarker for early cancer detection and monitoring the disease development during cancer treatment which is crucial in elevating the survival rate.
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