A number of reports have appeared in literature calling attention to the depletion of essential metal ions during chelation therapy on β-thalassaemia patients. We present a speciation study to determine how the iron chelators used in therapy interfere with the homeostatic equilibria of essential metal ions. This work includes a thorough analysis of the pharmacokinetic properties of the chelating agents currently in clinical use, of the amounts of iron, copper and zinc available in plasma for chelation, and of all the implied complex formation constants. The results of the study show that a significant amount of essential metal ions is complexed whenever the chelating agent concentration exceeds the amount necessary to coordinate all disposable iron—a frequently occurring situation during chelation therapy. On the contrary, copper and zinc do not interfere with iron chelation, except for a possible influence of copper on iron speciation during deferiprone treatment.
A Speciation Study on the Perturbing Effects of Iron Chelators on the Homeostasis of Essential Metal Ions / Crisponi, G; Nurchi, Vm; CRESPO ALONSO, M; Sanna, Gavino; Zoroddu, Maria Antonietta; Biesuz, M; Alberti, R.. - In: PLOS ONE. - ISSN 1932-6203. - 10:7(2015). [10.1371/journal.pone.0133050]
A Speciation Study on the Perturbing Effects of Iron Chelators on the Homeostasis of Essential Metal Ions
SANNA, Gavino;ZORODDU, Maria Antonietta;
2015-01-01
Abstract
A number of reports have appeared in literature calling attention to the depletion of essential metal ions during chelation therapy on β-thalassaemia patients. We present a speciation study to determine how the iron chelators used in therapy interfere with the homeostatic equilibria of essential metal ions. This work includes a thorough analysis of the pharmacokinetic properties of the chelating agents currently in clinical use, of the amounts of iron, copper and zinc available in plasma for chelation, and of all the implied complex formation constants. The results of the study show that a significant amount of essential metal ions is complexed whenever the chelating agent concentration exceeds the amount necessary to coordinate all disposable iron—a frequently occurring situation during chelation therapy. On the contrary, copper and zinc do not interfere with iron chelation, except for a possible influence of copper on iron speciation during deferiprone treatment.File | Dimensione | Formato | |
---|---|---|---|
pone.0133050.pdf
accesso aperto
Tipologia:
Versione editoriale (versione finale pubblicata)
Licenza:
Creative commons
Dimensione
1.13 MB
Formato
Adobe PDF
|
1.13 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.