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Mucopolysaccharidosis I, II, and VI: Brief review and guidelines for treatment
Roberto Giugliani1, Andressa Federhen, Maria Verônica Muñoz Rojas
1, Rede MPS Brasil Brazil.
Abstract:
Mucopolysaccharidoses (MPS) are rare genetic diseases caused by the deficiency of one of the lysosomal enzymes involved in the glycosaminoglycan (GAG) breakdown pathway. This metabolic block leads to the accumulation of GAG in various organs and tissues of the affected patients, resulting in a multisystemic clinical picture, sometimes including cognitive impairment. Until the beginning of the XXI century, treatment was mainly supportive. Bone marrow transplantation improved the natural course of the disease in some types of MPS, but the morbidity and mortality restricted its use to selected cases. The identification of the genes involved, the new molecular biology tools and the availability of animal models made it possible to develop specific enzyme replacement therapies (ERT) for these diseases. At present, a great number of Brazilian medical centers from all regions of the country have experience with ERT for MPS I, II, and VI, acquired not only through patient treatment but also in clinical trials. Taking the three types of MPS together, over 200 patients have been treated with ERT in our country. This document summarizes the experience of the professionals involved, along with the data available in the international literature, bringing together and harmonizing the information available on the management of these severe and progressive diseases, thus disclosing new prospects for Brazilian patients affected by these conditions.
Insights
Mucopolysaccharidoses (MPS) are rare genetic disorders treated with enzyme replacement therapy (ERT). Brazilian centers have treated over 200 patients with MPS I, II, and VI using ERT, offering new hope.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Mucopolysaccharidoses (MPS) are rare genetic lysosomal storage diseases.
- Deficiency in glycosaminoglycan (GAG) breakdown leads to GAG accumulation and multisystemic complications.
- Historically, treatment was supportive; bone marrow transplantation had limited application due to risks.
Purpose of the Study:
- To summarize the experience of Brazilian medical centers with enzyme replacement therapy (ERT) for MPS I, II, and VI.
- To harmonize information on managing these progressive genetic diseases.
- To present new prospects for Brazilian patients undergoing ERT.
Main Methods:
- Review of clinical trial data and patient treatment experience in Brazil.
- Synthesis of international literature on MPS management.
- Focus on ERT for MPS types I, II, and VI.
Main Results:
- Over 200 patients with MPS I, II, and VI have been treated with ERT across Brazil.
- Significant experience has been gained in ERT administration and patient management.
- ERT has emerged as a viable therapeutic option for these rare genetic disorders.
Conclusions:
- Enzyme replacement therapy (ERT) represents a significant advancement in managing MPS I, II, and VI.
- Brazilian medical centers possess substantial experience in ERT for MPS patients.
- This collective experience offers improved therapeutic prospects for individuals with these rare genetic conditions.
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