Abstract

Mucopolysaccharidoses (MPS) are a heterogeneous group of disorders that results in the absence or deficiency of lysosomal enzymes, leading to an inappropriate storage of glycosaminoglycans (GAGs) in various tissues of the body such as bones, cartilage, heart valves, arteries, upper airways, cornea, teeth, liver and nervous system. Clinical manifestations can become progressively exacerbated with age and affect their quality of life. Developments in advanced supportive treatment options such as enzyme replacement therapy (ERT), hematopoietic stem cell transplantation (HSCT) may have improved patients' life span. Adult MPS patients require specialist clinical surveillance long-term. In many cases, in addition to the MPS-related health problems, they may develop age-related complications. Considering the complexity of their clinical manifestations and lack of guidelines on the management of adult MPS disorders, multispecialty and multidisciplinary teams' care is essential to diagnose and treat health problems that are likely to be encountered. This review presents non-cardiac clinical manifestations, their pathophysiology, management and long-term outcomes in adult MPS patients.

Highlights

  • Mucopolysaccharidoses (MPS) are a heterogeneous group of disorders that results in the absence or deficiency of lysosomal enzymes, leading to an inappropriate storage of glycosaminoglycans (GAGs) in various tissues of the body such as bones, cartilage, heart valves, arteries, upper airways, cornea, teeth, liver, and nervous system [1] (Table 1).This results in alterations in cellular metabolism, which in turn leads to a range of manifestations that become progressively exacerbated with age

  • This review presents a detailed account of common non-cardiac clinical manifestations, their pathophysiology, management and long-term outcomes in adult MPS patients

  • Diagnostic and therapeutic developments lead to improved longevity in adult MPS patients

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Summary

Introduction

Mucopolysaccharidoses (MPS) are a heterogeneous group of disorders (type I, II, III, IV, VI, and VII) that results in the absence or deficiency of lysosomal enzymes, leading to an inappropriate storage of glycosaminoglycans (GAGs) in various tissues of the body such as bones, cartilage, heart valves, arteries, upper airways, cornea, teeth, liver, and nervous system [1] (Table 1).This results in alterations in cellular metabolism, which in turn leads to a range of manifestations that become progressively exacerbated with age. Mucopolysaccharidoses (MPS) are a heterogeneous group of disorders (type I, II, III, IV, VI, and VII) that results in the absence or deficiency of lysosomal enzymes, leading to an inappropriate storage of glycosaminoglycans (GAGs) in various tissues of the body such as bones, cartilage, heart valves, arteries, upper airways, cornea, teeth, liver, and nervous system [1] (Table 1). The MPS can affect multiple organ systems, affecting cognitive function and eventually resulting in severe debilitating and life limiting morbidity and premature death [5]. MPS I Hurler (H) MPS I Hurler-Scheie (H-S) MPS I Scheie (S) 0.11–1.67; AR

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