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Interaction between Ferastral and plasma factors.

J Fielding, V Doney

    Scandinavian Journal of Haematology. Supplementum
    |January 1, 1977
    PubMed
    Summary
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    Magnesium carbonate adsorbs smaller Ferastral molecules, which more readily donate iron to transferrin. This suggests smaller iron-poly (sorbitol-gluconic acid) complex species are absorbed faster after intramuscular injection.

    Area of Science:

    • Pharmacokinetics
    • Biochemistry
    • Drug Delivery

    Background:

    • Ferastral (iron-poly (sorbitol-gluconic acid) complex) is an intramuscular iron preparation.
    • Understanding its absorption and iron donation to transferrin is crucial for clinical use.

    Purpose of the Study:

    • To investigate the adsorption characteristics of Ferastral by magnesium carbonate.
    • To correlate adsorption with iron donation to transferrin and molecular size.
    • To elucidate the relationship between Ferastral absorption rate and molecular species.

    Main Methods:

    • Ferastral solutions (aqueous and serum) were incubated with magnesium carbonate.
    • Adsorption extent was measured.
    • Iron donation to transferrin was assessed.

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  • Molecular species were inferred based on adsorption and iron donation.

    • Main Results:

    • Complete adsorption of Ferastral in aqueous solution by magnesium carbonate.
    • Partial adsorption of Ferastral in serum solution.
    • Adsorption removed the fraction of Ferastral that readily donates iron to transferrin.
    • This fraction is suggested to be smaller molecular species.

    Conclusions:

    • Magnesium carbonate adsorption differentiates Ferastral fractions based on iron donation potential.
    • Smaller molecular species of Ferastral are likely responsible for rapid iron transfer to transferrin.
    • These findings help explain serum iron and Ferastral concentration dynamics post-intramuscular injection.