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Related Experiment Videos

Milk could decrease the bioavailability of 6-mercaptopurine.

G E Rivard1, K T Lin, J M Leclerc

  • 1Centre de Recherche Pediatrique, Hôpital Sainte-Justine, Montréal, Québec, Canada.

The American Journal of Pediatric Hematology/Oncology
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

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Cow's milk significantly degrades 6-mercaptopurine (6-MP), a crucial drug for childhood leukemia. Boiling milk prevents this degradation, potentially improving 6-MP therapy effectiveness.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Pediatric Oncology

Background:

  • The bioavailability of 6-mercaptopurine (6-MP) in children with acute lymphoblastic leukemia (ALL) is highly variable.
  • Xanthine oxidase (XO) in cow's milk can inactivate 6-MP, reducing its therapeutic efficacy.
  • XO converts 6-MP into inactive metabolites like 6-thiouric acid (6-TUA).

Purpose of the Study:

  • To investigate the impact of cow's milk on 6-MP stability.
  • To explore methods for preserving 6-MP integrity during oral administration.
  • To identify factors influencing 6-MP degradation by xanthine oxidase.

Main Methods:

  • Incubation of 6-MP with pasteurized cow's milk at 37°C for 30 minutes.
  • Assessing 6-MP degradation after incubation with raw and boiled milk.

Related Experiment Videos

  • Evaluating the effect of gastric juice, folic acid, and allopurinol on 6-MP stability in milk.

    • Main Results:

    • Pasteurized cow's milk transformed approximately 30% of a clinically relevant 6-MP concentration into 6-TUA.
    • Boiling milk for 5 minutes completely prevented the degradation of 6-MP.
    • Folic acid and allopurinol demonstrated significant inhibition of 6-MP degradation by milk at relevant concentrations.

    Conclusions:

    • Cow's milk, due to xanthine oxidase, can significantly reduce the bioavailability of 6-MP.
    • Boiling milk eliminates its 6-MP-degrading activity, suggesting a practical method to improve drug delivery.
    • Folic acid and allopurinol show potential as adjuncts to mitigate 6-MP inactivation by milk.