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Related Experiment Videos

The porphyrias, appropriate test selection.

J Thomas Hindmarsh1

  • 1Division of Biochemistry, The Ottawa Hospital, and Department of Pathology and Laboratory Medicine, The University of Ottawa, Canada. jhindmarsh@ottawahospital.on.ca

Clinica Chimica Acta; International Journal of Clinical Chemistry
|July 10, 2003
PubMed
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Diagnosing porphyrias is challenging. Current methods rely on measuring porphyrin metabolites, as advanced genetic testing is limited to specialized labs.

Area of Science:

  • Biochemistry
  • Genetics
  • Clinical Diagnostics

Background:

  • Porphyria diagnosis is complex, relying on clinical signs and measuring porphyrin metabolites in bodily fluids.
  • Current diagnostic approaches for porphyrias involve a range of techniques, from basic biochemical assays to genetic investigations.

Purpose of the Study:

  • To present an algorithm for diagnosing porphyrias.
  • To outline current diagnostic capabilities and limitations for porphyrias.

Main Methods:

  • Biochemical measurement of aminolevulinic acid (ALA) and porphobilinogen (PBG).
  • Enzymatic assays.
  • Investigation of genetic abnormalities.

Main Results:

  • Enzyme measurements are often impractical outside specialized settings.

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  • Genetic studies are becoming the standard for complex cases but are restricted to research laboratories.
  • Metabolite measurement remains the primary diagnostic tool for most clinical chemists.

    • Conclusions:

    • Clinical chemists predominantly use porphyrin metabolite measurements for porphyria diagnosis.
    • An algorithm for metabolite-based diagnosis is proposed.