The ultra-rare lysosomal diseases collectively affect 1 in 3,000 individuals and are responsible for significant morbidity and disability. The Lysosomal Disease Network (LDN) has created a community of clinical investigators, patient advocacy groups (PAG), and other interested parties, to become a synergistic research and educational consortium advocating advancement of treatment for these diseases. In the past three decades, lysosomal diseases have been a test bed for some of the most innovative therapeutic modalities. In the past 4 years of NIH funding, the LDN has accelerated knowledge acquisition in the field - with 33 MyNCBI cited publications, and 12 more in press/review/preparation-and furthered the development of therapeutic options. For the next 5 years, this proposal describes 9 longitudinal studies of natural history and/or treatment, and 5 pilot studies for novel ideas under the central theme of "discovery in ultra-orphan diseases". Because central nervous system (CNS) disease is the most difficult to treat and measure, there is a major emphasis on quantitative analysis of CNS structure, function and biomarkers for relevant conditions: mucopolysaccharidoses (MPS), mucolipidosis IV, Batten disease, gangliosidoses (Tay-Sachs, Sandhoff and GM1 gangliosidosis diseases), globoid cell leukodystrophy. Projects will (a) evaluate immune modulatory factors affecting treatment response in Pompe disease;(b) assess bone disease in MPS, (c) correlate renal structure and function in Fabry disease;(d) search for undiagnosed Fabry disease in high-risk populations;(e) determine outcomes of newborn screening for Krabbe disease;and (f) shorten the diagnostic odyssey. Productivity is assured by a new performance-based model, with proposals initially vetted for rigorous statistical significance, and reimbursement to investigators governed by DMCC data submission. In addition, this network: (a) supports two postdoctoral fellows each year;(b) organizes a scientific meeting "WORLD Symposium" published annually (February, Molecular Genetics &Metabolism);and (c) a didactic course for experts, "Lysosomes 101". Global communication is provided by a list-serve with more than 3,000 subscribers, webinars, and the website

Public Health Relevance

The combined and integrated efforts of the Lysosomal Disease Network focus limited resources toward creating a network of centers with expertise in these diseases in order to solve major challenges in diagnosis, disease management, and therapy. Solutions to these problems will have direct impact on patients suffering from lysosomal diseases, with important implications for medical practice and individual quality-of-life.

National Institute of Health (NIH)
National Institute of Neurological Disorders and Stroke (NINDS)
Specialized Center--Cooperative Agreements (U54)
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Special Emphasis Panel (ZTR1-CI-8 (01))
Program Officer
Morris, Jill A
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University of Minnesota Twin Cities
Schools of Medicine
United States
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Mauer, Michael; Glynn, Emily; Svarstad, Einar et al. (2014) Mosaicism of podocyte involvement is related to podocyte injury in females with Fabry disease. PLoS One 9:e112188
Rumsey, Robin K; Rudser, Kyle; Delaney, Kathleen et al. (2014) Acquired autistic behaviors in children with mucopolysaccharidosis type IIIA. J Pediatr 164:1147-1151.e1
Schiffmann, Raphael; Forni, Sabrina; Swift, Caren et al. (2014) Risk of death in heart disease is associated with elevated urinary globotriaosylceramide. J Am Heart Assoc 3:e000394
Polgreen, Lynda E; Thomas, William; Fung, Ellen et al. (2014) Low bone mineral content and challenges in interpretation of dual-energy X-ray absorptiometry in children with mucopolysaccharidosis types I, II, and VI. J Clin Densitom 17:200-6
Polgreen, Lynda E; Thomas, William; Orchard, Paul J et al. (2014) Effect of recombinant human growth hormone on changes in height, bone mineral density, and body composition over 1-2 years in children with Hurler or Hunter syndrome. Mol Genet Metab 111:101-6
Stevenson, David A; Rudser, Kyle; Kunin-Batson, Alicia et al. (2014) Biomarkers of bone remodeling in children with mucopolysaccharidosis types I, II, and VI. J Pediatr Rehabil Med 7:159-65
Prater, Sean N; Banugaria, Suhrad G; Morgan, Claire et al. (2014) Letter to the Editors: Concerning "CRIM-negative Pompe disease patients with satisfactory clinical outcomes on enzyme replacement therapy" by Al Khallaf et al. J Inherit Metab Dis 37:141-3
Schiffmann, Raphael; Mayfield, Joan; Swift, Caren et al. (2014) Quantitative neuroimaging in mucolipidosis type IV. Mol Genet Metab 111:147-51
Wang, Raymond Y; Braunlin, Elizabeth A; Rudser, Kyle D et al. (2014) Carotid intima-media thickness is increased in patients with treated mucopolysaccharidosis types I and II, and correlates with arterial stiffness. Mol Genet Metab 111:128-32
Ahmed, Alia; Whitley, Chester B; Cooksley, Renee et al. (2014) Neurocognitive and neuropsychiatric phenotypes associated with the mutation L238Q of the *-L-iduronidase gene in Hurler-Scheie syndrome. Mol Genet Metab 111:123-7

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