Metabolic incorporation of azide- or alkyne-modified sialic acids into the cellular glycosylation pathway enables the study of sialoglycan expression, localization, and trafficking via bioorthogonal chemistry. Herein, we report that such modifications of the sialic acid sugar can have a profound influence on their hydrolysis by neuraminidases (sialidase). Azidoacetyl (Az)-modified sialic acids ...

Sialic acid and glucuronic acid are monocarboxylated monosaccharides, which are normally present in sugar side chains of glycoproteins, glycolipids, and glycosaminoglycans. After degradation of these compounds in lysosomes, the free monosaccharides are released from the lysosome by a specific membrane transport system. This transport system is deficient in the human hereditary lysosomal sialic ...

Atherogenic modification of low-density lipoprotein (LDL) plays a crucial role in the pathogenesis of atherosclerosis, as modified LDL, but not native LDL, induces pronounced accumulation of cholesterol and lipids in the arterial wall. It is likely that LDL particles undergo multiple modifications in human plasma: desialylation, changes in size and density, acquisition of negative electric char...

BACKGROUND Sialic acid, a key component of both human milk oligosaccharides and neural tissues, may be a conditional nutrient during periods of rapid brain growth. OBJECTIVE We tested the hypothesis that variations in the sialic acid content of a formula milk would influence early learning behavior and gene expression of enzymes involved in sialic acid metabolism in piglets. DESIGN Piglets ...

background: several changes in serum biochemical factors occur in acute myocardial infarction (ami). recently alterations in serum levels of homocysteine (hcy), sialic acid (sa) and high sensitive c-reactive protein (hs-crp) has been attended as risk factors and index for prediction. this study was aimed to show the alterations in these factors and their relationships in ami. methods: thirty fo...

Background: It has been recently established that serum sialic acid is a potent cardiovascular and renal risk factor in the general population and elevated in diabetic type 2 patients. This study was designed to assess the coexistence of frequently documented risk factors of diabetic nephropathy with serum sialic acid. Methods: A total of 100 diabetic patients (50 with and 50 without nephropath...

N-Acetylneuraminic acid is the most prominent sialic acid in eukaryotes. The structural diversity of sialic acid is exploited by viruses, bacteria, and toxins and by the sialoglycoproteins and sialoglycolipids involved in cell-cell recognition in their highly specific recognition and binding to cellular receptors. The physiological precursor of all sialic acids is N-acetyl D-mannosamine (ManNAc...