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Platelet adhesiveness and aggregation. II. Surface sialic acid, glycoprotein: N-acetylneuraminic acid transferase, and neuraminidase of human blood platelets.
H B Bosmann
Biochimica et biophysica acta, 279(3), 456-474 (1972-10-25)
Takahiro Yonekawa et al.
Brain : a journal of neurology, 137(Pt 10), 2670-2679 (2014-07-27)
Patients with GNE myopathy, a progressive and debilitating disease caused by a genetic defect in sialic acid biosynthesis, rely on supportive care and eventually become wheelchair-bound. To elucidate whether GNE myopathy is treatable at a progressive stage of the disease...
N L O'Regan et al.
Parasite immunology, 36(12), 713-720 (2014-08-16)
Helminths induce strong regulatory and T helper 2-type responses, whereby antibody-derived host protection and regulation are essential components. Lymphatic filariasis is an immune-mediated spectral disease that manifests as two main clinical outcomes: chronic pathology or asymptomatic infection. These outcomes depend...
Juliana H F Yeung et al.
Biochemistry, 52(51), 9177-9186 (2013-12-04)
Aspergillus fumigatus is an airborne fungal pathogen. We previously cloned and characterized an exo-sialidase from A. fumigatus and showed that it preferred 2-keto-3-deoxynononic acid (KDN) as a substrate to N-acetylneuraminic acid (Neu5Ac). The purpose of this study was to investigate...
S-H Sheldon Tai et al.
Virus research, 210, 126-132 (2015-08-08)
Neuraminidase inhibitors (NAIs), including the most frequently prescribed oral therapeutic oseltamivir, play a critical role in the control of severe influenza virus (IFV) infections. However, recent reports of spread of an oseltamivir-resistant H1N1 pandemic strain in individuals who have never...
Kannan Tharakaraman et al.
Cell, 153(7), 1475-1485 (2013-06-12)
Of the factors governing human-to-human transmission of the highly pathogenic avian-adapted H5N1 virus, the most critical is the acquisition of mutations on the viral hemagglutinin (HA) to "quantitatively switch" its binding from avian to human glycan receptors. Here, we describe...
Sasirekha Ramani et al.
Journal of virology, 87(13), 7255-7264 (2013-04-26)
Naturally occurring bovine-human reassortant rotaviruses with a P[11] VP4 genotype exhibit a tropism for neonates. Interaction of the VP8* domain of the spike protein VP4 with sialic acid was thought to be the key mediator for rotavirus infectivity. However, recent...
Youngsoo Sohn et al.
BMB reports, 46(3), 157-162 (2013-03-27)
Human α-galactosidase A (GLA) has been used in enzyme replacement therapy for patients with Fabry disease. We expressed recombinant GLA from Chinese hamster ovary cells with very high productivity. When compared to an approved GLA (agalsidase beta), its size and...
Bärbel S Blaum et al.
Nature chemical biology, 11(1), 77-82 (2014-11-18)
The serum protein complement factor H (FH) ensures downregulation of the complement alternative pathway, a branch of innate immunity, upon interaction with specific glycans on host cell surfaces. Using ligand-based NMR, we screened a comprehensive set of sialylated glycans for...
Serhan Sakarya et al.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica, 122(10), 941-950 (2014-03-19)
Helicobacter pylori is a major causative agent of gastritis and peptic ulcer disease and is an established risk factor for gastric malignancy. Antibiotic combination therapy can eradicate H. pylori. As these same regimens can evoke adverse effects and resistance, new alternative...
Guilherme L Sassaki et al.
Biochemistry, 52(41), 7217-7230 (2013-09-11)
Differential interactions between influenza A virus protein hemagglutinin (HA) and α2→3 (avian) or α2→6 (human) sialylated glycan receptors play an important role in governing host specificity and adaptation of the virus. Previous analysis of HA-glycan interactions with trisaccharides showed that...
Masamichi Nagae et al.
The Journal of biological chemistry, 288(47), 33784-33796 (2013-10-09)
Polysialic acid is a linear homopolymer of α2-8-linked sialic acids attached mainly onto glycoproteins. Cell surface polysialic acid plays roles in cell adhesion and differentiation events in a manner that is often dependent on the degree of polymerization (DP). Anti-oligo/polysialic...
Koji Yamada
Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 122(12), 1133-1143 (2003-01-04)
Glycosphingolipids (GSLs), together with glycopeptides, are typical constitutents of various cell membranes in a wide variety of organisms. In particular, it is known that GSLs have numerous physiological functions due to variations in the sugar chain, in spite of the...
J Baumkötter et al.
Human genetics, 71(2), 155-159 (1985-01-01)
Increased amounts of free sialic acid were found in body fluids, leukocytes, cultured fibroblasts, and liver tissue of a four-year-old boy with mental retardation, ataxia, and clinical and radiologic findings of a mild mucopolysaccharidosis. A diagnosis of Salla disease was...
Chen Chen et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 969, 171-180 (2014-09-01)
One challenge facing the purification of therapeutic glycoproteins by affinity chromatography is creating ligands specific for the glycan moiety. Affinity chromatography of glycoproteins is currently conducted with immobilized lectins or boronates, although biomimetic ligands could present a more desirable option....
Simon Fillatreau
European journal of immunology, 44(5), 1276-1280 (2014-04-05)
Antibodies are well known for their role in humoral immunity, and their prominent involvement in the protection afforded by successful vaccines against infections. A less appreciated function of antibodies is their capacity to dampen the autoimmune responses associated with some...
T A Timofeeva et al.
Voprosy virusologii, 58(1), 24-27 (2013-06-22)
The influenza virus hemagglutinin (HA) is an envelope virus glycoprotein responsible for the attachment of the virus particles to cells via binding terminal sialic acid residues of cell surface oligosaccharides. In our previous works on influenza A virus escape mutants...
Emma R Job et al.
PloS one, 8(3), e59623-e59623 (2013-04-02)
Members of the pentraxin family, including PTX3 and serum amyloid P component (SAP), have been reported to play a role in innate host defence against a range of microbial pathogens, yet little is known regarding their antiviral activities. In this...
Che C Colpitts et al.
Journal of virology, 88(14), 7806-7817 (2014-05-03)
Primary attachment to cellular glycans is a critical entry step for most human viruses. Some viruses, such as herpes simplex virus type 1 (HSV-1) and hepatitis C virus (HCV), bind to heparan sulfate, whereas others, such as influenza A virus...
Wei Zhang et al.
Journal of virology, 87(10), 5949-5958 (2013-03-22)
Influenza A virus uses sialic acids as cell entry receptors, and there are two main receptor forms, α2,6 linkage or α2,3 linkage to galactose, that determine virus host ranges (mammalian or avian). The receptor binding hemagglutinins (HAs) of both 1918...
Sébastien Blaise et al.
Diabetes, 62(11), 3807-3816 (2013-08-08)
Although it has long been established that the extracellular matrix acts as a mechanical support, its degradation products, which mainly accumulate during aging, have also been demonstrated to play an important role in cell physiology and the development of cardiovascular...
Chiguang Feng et al.
Journal of immunology (Baltimore, Md. : 1950), 191(9), 4828-4837 (2013-09-27)
We previously reported that removal of sialyl residues primed PBMCs to respond to bacterial LPS stimulation in vitro. Therefore, we speculated that prior desialylation can sensitize the host to generate an enhanced inflammatory response upon exposure to a TLR ligand...
A Brusque et al.
Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas, 34(2), 227-231 (2001-02-15)
Levels of methylmalonic acid (MMA) comparable to those of human methylmalonic acidemia were achieved in blood (2-2.5 mmol/l) and brain (1.35 umol/g) of rats by administering buffered MMA, pH 7.4, subcutaneously twice a day from the 5th to the 28th...
Yang-Yang Han et al.
Biochemical pharmacology, 86(9), 1254-1262 (2013-08-22)
Antibacterial peptides (ABPs) with cancer-selective toxicity have received much more attention as alternative chemotherapeutic agents in recent years. However, the basis of their anticancer activity remains unclear. The modification of cell surface glycosylation is a characteristic of cancer cells. The...
Nhung Huynh et al.
Biochemistry, 52(47), 8570-8579 (2013-10-25)
N-Acetylneuraminate lyases (NALs) or sialic acid aldolases catalyze the reversible aldol cleavage of N-acetylneuraminic acid (Neu5Ac, the most common form of sialic acid) to form pyruvate and N-acetyl-d-mannosamine. Although equilibrium favors sialic acid cleavage, these enzymes can be used for...
Vanessa Escuret et al.
The Journal of infectious diseases, 210(8), 1260-1269 (2014-05-06)
Influenza B viruses with a novel I221L substitution in neuraminidase (NA) conferring high-level resistance to oseltamivir were isolated from an immunocompromised patient after prolonged oseltamivir treatment. Enzymatic characterization of the NAs (Km, Ki) and the in vitro fitness of viruses...
Reshmi Parameswaran et al.
The Journal of experimental medicine, 210(4), 805-819 (2013-03-13)
The development of resistance to chemotherapy is a major cause of relapse in acute lymphoblastic leukemia (ALL). Though several mechanisms associated with drug resistance have been studied in detail, the role of carbohydrate modification remains unexplored. Here, we investigated the...
Ahmed Abdal Dayem et al.
PloS one, 10(3), e0121610-e0121610 (2015-03-26)
Influenza is an infectious respiratory disease with frequent seasonal epidemics that causes a high rate of mortality and morbidity in humans, poultry, and animals. Influenza is a serious economic concern due to the costly countermeasures it necessitates. In this study...
Saori Yoneda et al.
PloS one, 9(6), e99263-e99263 (2014-06-05)
Fusobacterium nucleatum is a ubiquitous member of the human oral flora and is associated with the development of periodontitis and a variety of other types of polymicrobial infections of the mucosa. In the oral cavity, this species is one of...
H Watzlawick et al.
The Biochemical journal, 277 ( Pt 3), 753-758 (1991-08-01)
Galactoglycoprotein is a unique human plasma protein [76% carbohydrate (23% N-acetylneuraminic acid, 20% galactose, 3% mannose, 1% fucose and 29% N-acetylgalactosamine plus N-acetylglucosamine) and 24% polypeptide, a single polypeptide chain of about 200 amino acid residues that is high in...
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