Aspartyglucosaminuria (AGU) is a lysosomal storage disease with autosomal recessive inheritance that is caused by deficient activity of aspartylglucosaminidase (AGA), a lysosomal enzyme belonging to the newly described enzyme family of N-terminal hydrolases. An AGU mouse model was generated by targeted disruption of the AGA gene designed to mimic closely one human disease mutation. These homozy...

Defective catabolite export from lysosomes results in lysosomal storage diseases in humans. Mutations in the cystine transporter gene CTNS cause cystinosis, but other lysosomal amino acid transporters are poorly characterized at the molecular level. Here, we identified the Caenorhabditis elegans lysosomal lysine/arginine transporter LAAT-1. Loss of laat-1 caused accumulation of lysine and argin...

Lysosomes are organelles central to degradation and recycling processes in animal cells. Whether lysosomal activity is coordinated to respond to cellular needs remains unclear. We found that most lysosomal genes exhibit coordinated transcriptional behavior and are regulated by the transcription factor EB (TFEB). Under aberrant lysosomal storage conditions, TFEB translocated from the cytoplasm t...

The lysosomal system comprises a specialized network of organelles crucial for the sorting, digestion, recycling and secretion of cellular components. With their content of hydrolytic enzymes, lysosomes regulate the degradation of a multitude of substrates that reach these organelles via the biosynthetic or the endocytic route. Gene defects that affect one or more of these hydrolases lead to LS...

Fabry disease is an X-linked lysosomal storage disorder caused by pathogenic variants in the GLA gene leading to a deficiency of enzyme alpha-galactosidase A (α-Gal A). Multiple organ systems are implicated disease, most severely cardiac, kidney, and central nervous systems. In this brief review, we will focus on kidney system involvement.

Gaucher disease is the most common lysosomal storage disease. It is caused by the defective activity of acid β-glucosidase, which results in the accumulation of lipid glucocerebroside in macrophages throughout the body. In this case report we describe the case of a young adult woman with splenomegaly as the primary manifestation of this pathology. This is a case of type 1 Gaucher disease becaus...

Lysosomal storage disorders (LSDs) are inherited diseases characterized by progressive intracellular accumulation of undigested macromolecules within the cell due to specific lysosomal defects. Lysosomal storage results in a global impairment ofmany lysosome‐dependent pathways (e.g. autophagy and endocytosis), leading to cellular dysfunction and death (Ballabio &Gieselmann, 2009). LSD patients ...

In continued efforts to develop enzymatic assays for lysosomal storage diseases appropriate for newborn screening laboratories we have synthesized novel and specific enzyme substrates for Maroteaux-Lamy (MPS VI) and Morquio A (MPS IVA) diseases. The sulfated monosaccharide derivatives were found to be converted to product by the respective enzyme in blood from healthy patients but not by blood ...

how to cite this article: alaei mr. preinatal types of niemann-pick disease type c. iran j child neurol. 2015 autumn;9:4(suppl.1): 12. pls see pdf.

Received December 15, 2003 Abstract In this article, we review specific therapies that tackle the basic biochemical defects of lysosomal storage diseases. These include bone marrow transplantation, substrate deprivation therapy, enzyme replacement therapy and enzyme enhancement therapy. We particularly update the progress of development of enzyme replacement therapy, which plays a major role in...