Correspondence to Frances M. Platt: [email protected]; Barry Boland: [email protected]; or Aarnoud C. van der Spoel: [email protected] Abbreviations used in this paper: CNS, central nervous system; LSD, lysosomal storage disease; NPC, Niemann-Pick type C. Lysosomal storage disorders: A brief overview Inborn errors of metabolism are a common cause of inherited disease (Burton, 1998), of...

Protective protein/cathepsin A (PPCA) is a pleiotropic lysosomal enzyme that complexes with beta-galactosidase and neuraminidase, and possesses serine carboxypeptidase activity. Its deficiency in man results in the neurodegenerative lysosomal storage disorder galactosialidosis (GS). The mouse model of this disease resembles the human early onset phenotype and results in severe nephropathy and a...

Fucosidosis is a rare lysosomal storage disorder caused by the inherited deficiency of the lysosomal hydrolase α-L-fucosidase, which leads to an impaired degradation of fucosylated glycoconjugates. Here, we report the generation of a fucosidosis mouse model, in which the gene for lysosomal α-L-fucosidase (Fuca1) was disrupted by gene targeting. Homozygous knockout mice completely lack α-L-fucos...

Mucopolysaccharidosis VII (MPS VII) is a lysosomal storage disease caused by deficient beta-glucuronidase (GUSB) activity. Accumulation of glycosaminoglycans (GAGs) in bone, cartilage, and synovium likely contributes to reduced mobility in untreated MPS VII individuals. We previously reported that neonatal intravenous injection of a retroviral vector (RV) expressing canine GUSB resulted in hepa...

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...

Gaucher Disease (GD) is the most common type of Lysosomal Storage Disorder and it is divided into three distinct subtypes. The authors here report four different cases of Gaucher Disease, with varying clinical manifestations, and the diagnosis of each established by the low level of Beta-Glucosidase enzyme as well as genetic DNA testing. The study also highlights the importance of early diagnos...

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...

Niemann-Pick Diseases (NPD) is lysosomal storage diseases caused by Acid Sphingo Myelinase (ASM) deficiency, which catalyzes the hydrolysis of Myelin

Phospholipidosis is an adverse effect caused by numerous cationic amphiphilic drugs and can affect many cell types. It is characterized by the excess accumulation of phospholipids and is most reliably identified by electron microscopy of cells revealing the presence of lamellar inclusion bodies. The development of phospholipidosis can cause a delay in the drug development process, and the impor...