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Related Experiment Videos

A single sample saliva test to determine acetylator phenotype

A D Hutchings1, P A Routledge

  • 1Department of Pharmacology and Therapeutics, University of Wales College of Medicine, Cardiff, UK.

British Journal of Clinical Pharmacology
|November 1, 1996
PubMed
Summary

This study compared acetylator phenotyping using plasma versus saliva acetylisoniazid to isoniazid ratios. Saliva analysis offers a simple, non-invasive alternative for accurately assessing acetylator status.

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Area of Science:

  • Pharmacology
  • Clinical Chemistry
  • Biochemistry

Background:

  • Acetylator phenotype influences drug metabolism.
  • Isoniazid acetylation is a common phenotyping method.
  • Plasma-based phenotyping requires invasive blood collection.

Purpose of the Study:

  • To compare acetylator phenotyping using plasma and saliva.
  • To evaluate saliva as a non-invasive alternative for phenotyping.
  • To determine the agreement between plasma and saliva acetylisoniazid/isoniazid ratios.

Main Methods:

  • Oral administration of isoniazid (200mg) to 154 subjects.
  • Measurement of acetylisoniazid to isoniazid (AcINH/INH) ratios in plasma and saliva at 3 hours.
  • Comparison of phenotyping results based on plasma and saliva ratios.

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Main Results:

  • High agreement (one exception) between plasma and saliva phenotyping.
  • Plasma fast acetylators (ratio > 1.5) identified 68/154 subjects.
  • Saliva AcINH/INH ratios showed excellent correlation with plasma ratios.

Conclusions:

  • Saliva acetylisoniazid/isoniazid ratio is a reliable indicator of acetylator status.
  • Saliva phenotyping provides a simple, non-invasive alternative to plasma analysis.
  • This method can simplify acetylator status determination in clinical settings.