Many lysosomal storage diseases are characterized by an increased urinary excretion of glycoconjugates and oligosaccharides that are characteristic for the underlying enzymatic defect. Here, we have used capillary high-performance anion-exchange chromatography (HPAEC) hyphenated to mass spectrometry to analyze free oligosaccharides from urine samples of patients suffering from the lysosomal sto...

Correspondence to: Dr Perry Elliott, The Heart Hospital, 16–18 Westmoreland Street, London, W1G 8PH, UK; [email protected] __________________________ L ysosomal storage disorders (LSD) comprise a group of more than 40 diseases caused by a deficiency of lysosomal enzymes, membrane transporters or other proteins involved in lysosomal biology. The predominant inheritance pattern is autosomal...

BACKGROUND The potential association of dermal melanocytosis with lysosomal storage disease in infancy is an uncommonly known and poorly understood entity. OBSERVATIONS We describe 2 infants with extensive dermal melanocytosis in association with GM1 gangliosidosis type 1 and Hurler syndrome, respectively. A literature analysis revealed 37 additional cases. Clinically, dermal melanocytosis as...

Purpose To describe the ocular findings in a patient with fucosidosis, a rare inborn lysosomal storage disease. Observations A 14 year-old female presented with angiokeratomas corporis diffusum, coarse facial features, poor verbal skills, hearing impairment and mild developmental delay. A lysosomal storage enzyme screen confirmed absent activity of α-l-fucosidase consistent with a diagnosis o...

Clearance of cellular debris is a critical feature of the developing nervous system, as evidenced by the severe neurological consequences of lysosomal storage diseases in children. An important developmental process, which generates considerable cellular debris, is synapse elimination, in which many axonal branches are pruned. The fate of these pruned branches is not known. Here, we investigate...

The lysosomal system is the main intracellular mechanism for the catabolism of naturally occurring endogenous and exogenous macromolecules and the subsequent recycling of their constituent monomeric components. It also plays an important part in processing essential metabolites. A genetic defect in a protein responsible for maintaining the lysosomal system results in the accumulation within lys...

Lysosomal storage is the most common cause of neurodegenerative brain disease in preadulthood. However, the underlying cellular mechanisms that lead to neuronal dysfunction are unknown. Here, we report that loss of Drosophila benchwarmer (bnch), a predicted lysosomal sugar carrier, leads to carbohydrate storage in yolk spheres during oogenesis and results in widespread accumulation of enlarged ...

Glycoproteins containing the mannose 6-phosphate (Man-6-P) modification represent a class of proteins of considerable biomedical importance. They include over sixty different soluble lysosomal hydrolases and accessory proteins, deficiencies of which result in over forty different known human genetic diseases. In addition, there are patients with lysosomal storage diseases of unknown etiology an...

A defective efflux of free sialic acid from the lysosomal compartment has been found in the clinically heterogeneous group of sialic acid storage disorders. Using radiolabeled sialic acid (NeuAc) as a substrate, we have recently detected and characterized a proton-driven carrier for sialic acid in the lysosomal membrane from rat liver. This carrier also recognizes and transports other acidic mo...