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Urinary acid mucopolysaccharides in multiple sulfatase deficiency (mucosulfatidosis)
Abstract:
Urinary acid mucopolysaccharides (AMPS) excretion was investigated in a Japanese case with Multiple Sulfatase Deficiency (MSD) (Mucosulfatidosis). The patient excreted AMPS 4 to 5 times more (as carbazoluronic acid) than controls. The cellulose acetate gel electrophoresis clearly indicated two major AMPS which co-migrated with heparan sulfate and chondroitin sulfate A/C. Enzymic digestion with chondroitinase AC and ABC, and by testicular hyaluronidase plus amino sugar analysis also confirmed that our case excreted heparan sulfate and chondroitin sulfate A/C. These findings suggest that there are heterogeneities of urinary AMPS excretion among cases with MSD.
Insights
Urinary acid mucopolysaccharides (AMPS) are elevated in Multiple Sulfatase Deficiency (MSD). This study identifies specific AMPS types, heparan sulfate and chondroitin sulfate A/C, in a Japanese MSD patient, suggesting varied excretion patterns.
Area of Science:
- Biochemistry
- Genetics
- Metabolic Disorders
Background:
- Multiple Sulfatase Deficiency (MSD), also known as Mucosulfatidosis, is a rare genetic disorder.
- MSD is characterized by the combined deficiency of multiple sulfatase enzymes, leading to the accumulation of sulfated glycosaminoglycans.
- Understanding the specific patterns of mucopolysaccharide excretion is crucial for diagnosing and managing MSD.
Observation:
- A Japanese patient diagnosed with Multiple Sulfatase Deficiency (MSD) was studied.
- Urinary acid mucopolysaccharides (AMPS) levels were measured and compared to healthy controls.
- Qualitative and quantitative analyses were performed on the excreted AMPS.
Findings:
- The patient exhibited significantly elevated urinary AMPS excretion, 4 to 5 times higher than controls.
- Cellulose acetate gel electrophoresis identified two major AMPS fractions co-migrating with heparan sulfate and chondroitin sulfate A/C.
- Enzymatic digestion and biochemical analyses confirmed the presence of heparan sulfate and chondroitin sulfate A/C in the patient's urine.
Implications:
- The findings indicate that urinary AMPS excretion profiles can vary among individuals with MSD.
- This heterogeneity in AMPS excretion may have diagnostic or prognostic significance.
- Further research into these variations could lead to a more refined understanding of MSD pathophysiology.