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Related Experiment Videos

Selective urinary screening for mucopolysaccharidoses.

P P Dembure1, J E Drumheller, S M Barr

  • 1Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322.

Clinical Biochemistry
|February 1, 1990
PubMed
Summary
This summary is machine-generated.

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Improved methods for analyzing urinary glycosaminoglycans (GAGs) efficiently screen for mucopolysaccharidoses. These quantitative and qualitative analyses are economical, efficient, and suitable for clinical use.

Area of Science:

  • Biochemistry
  • Clinical Chemistry
  • Genetics

Background:

  • Mucopolysaccharidoses are rare genetic disorders.
  • Accurate and efficient screening methods are crucial for early diagnosis.
  • Current diagnostic methods can be time-consuming and expensive.

Purpose of the Study:

  • To modify and improve existing methods for analyzing urinary glycosaminoglycans (GAGs).
  • To establish efficient screening protocols for mucopolysaccharidoses.
  • To evaluate the clinical utility of the improved methods.

Main Methods:

  • Spectrophotometric measurement of alcian blue complex formation for quantitative GAG analysis.
  • Qualitative analysis using thin-layer chromatography with alternating solvent systems.

Related Experiment Videos

  • Establishment of normal GAG excretion ranges using 120 urine samples.
  • Application of methods to 2057 urine samples over 4 years.

    • Main Results:

    • Six patients with abnormal urinary GAG excretion showed significantly higher levels (mean 50.5 ± 20.6 mg GAG/mmol creatinine) compared to controls (mean 3.4 ± 2.9).
    • Thin-layer chromatography successfully identified specific excess GAGs, aiding in the selection of confirmatory enzyme assays.
    • Six cases of mucopolysaccharidoses were diagnosed prospectively.

    Conclusions:

    • The improved quantitative and qualitative methods for urinary GAG analysis are economical and efficient.
    • These methods are suitable for routine clinical use in screening for mucopolysaccharidoses.
    • Early and accurate diagnosis of mucopolysaccharidoses is facilitated by these screening techniques.