Longitudinal Study of Bone and Endocrine Disease
Ontology highlight
ABSTRACT: Mucopolysaccharidoses (MPS) I, II, and VI are a group of rare, lysosomal storage diseases in which certain enzymes are missing that are normally required for breaking down specific complex carbohydrates. Deficiencies in these enzymes result in the build-up of toxic substances in various tissues and cause damage to the body's organs. In the past, children diagnosed with MPS I, II, or VI frequently died in early to late childhood. Recent advances in treatments including hematopoietic cell transplantation (HCT) and enzyme replacement therapy (ERT) have been helping children with these disorders live into adulthood. The long term-course of the disease is now unknown. Unfortunately, severe skeletal disease persists for most individuals despite current therapies. This is a longitudinal study of 50 children and adults with MPS I, II, and VI. Study participants will be evaluated every year for up to 3 years. The purpose of this study is to document the progression of skeletal disease and identify biomarkers that either predict disease severity or could be used as therapeutic targets. This information is needed to:
REPOSITORIES: dbGaP
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| phs000019.v1.p1 | EGA
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2020-07-01 | GSE130088 | GEO
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| phs001328 | dbGaP
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| phs000017.v3.p1 | EGA
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| phs000430.v1.p1 | EGA
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2024-07-22 | GSE224136 | GEO
Project description:Lysosomal storage disorders (LSDs) are a group of inherited metabolic disorders . A subgroup of LSDs is called Mucopolysaccharidoses (MPS), where accumulation of glycosaminoglycans causes a progressive degenerative disorder. The central nervous system (CNS) is particularly impacted with developmental delays, neurological regression, and early mortality. Current treatments are often insufficient to fully address the clinical need. Here we report the use of microglia derived from healthy human induced pluripotent stem cells (hiPSCs) as a potential one-time, allogeneic off-the-shelf cell therapy for several MPS. iPSC-derived microglia, termed MG01 , are replete with wild-type levels of lysosomal enzymes and we show that MG01 can deliver the functional enzyme into four different MPS knockout cell lines via mannose-6-phosphate receptor-mediated endocytosis in vitro. We then show that a single administration of MG01 provides sufficient enzyme to prevent behavioral deficits in two different animal models of MPS, efficacious to at least eight months after transplantation.
2024-07-22 | GSE222969 | GEO
Project description:The aim of the present project is to assess the effects of the chronic diseases and their associated treatments chronic paediatric diseases (CPD), to further understand their impact on physical fitness for public health perspectives. This is an innovative approach in the treatment of chronic paediatric diseases . This project should yield results that help improving treatments for children and adolescents with chronic paediatric diseases throughout physical activity as therapy, reduced pain, fatigue and inflammation, and improvement in physical fitness and life quality. The originality and novelty of this project is to combine architectural, functional and metabolic components of skeletal muscle to further understand the impact of chronic paediatric diseases as a function of treatment, disease activity and maturation status (prepubertal, pubertal or post pubertal).
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Project description:Sanfilippo syndrome childhood dementia, also known as mucopolysaccharidosis type III (MPS III), is a rare inherited lysosomal storage disorder. Subtypes of MPS III are caused by deficiencies in one of four enzymes required for degradation of the glycosaminoglycan heparan sulfate (HS). An inability to degrade HS leads to progressive neurodegeneration and death in the second or third decades of life. Knowledge of MPS III pathogenesis is incomplete, and no effective therapies exist. We generated the hypomorphic mutations sgshS387Lfs, nagluA603Efs and hgsnatG577Sfsin the endogenous zebrafish genes orthologous to human SGSH, NAGLU, and HGSNAT that are loci for mutations causing MPS III subtypes MPS IIIA, B and C respectively. Our models display the primary MPS III disease signature of significant brain accumulation of HS, while behavioural analyses support hyperactivity phenotypes. Brain transcriptome analysis revealed changes related to lysosomal, glycosaminoglycan, immune system and iron homeostasis biology in all three models but also distinct differences in brain transcriptome state between models. The transcriptome analysis also indicated marked disturbance of the oligodendrocyte cell state in the brains of MPS IIIA, B and C zebrafish, supporting that effects on this cell type are an early and consistent characteristic of MPS III. Overall, our zebrafish models recapture key characteristics of the human disease and phenotypes seen in mouse models. Our models will allow exploitation of the zebrafish’s extreme fecundity and accessible anatomy to dissect the pathological mechanisms both common and divergent between the MPS IIIA, B, and C subtypes.
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