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Related Concept Videos

Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
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Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...
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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Related Experiment Video

Updated: Jul 14, 2026

Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron
05:36

Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron

Published on: February 23, 2024

Recent developments in iron chelation therapy.

H Cario1, G Janka-Schaub, G Janssen

  • 1Klinik für Kinder- und Jugendmedizin, Universitätsklinikum Ulm, Eythstrasse 24, 89075 Ulm. holger.cario@uniklinik-ulm.de

Klinische Padiatrie
|May 26, 2007
PubMed
Summary

Iron overload can now be treated with three chelating agents: desferrioxamine (DFO), deferiprone (DFP), and deferasirox (DSX). New methods like cardiac MRI assess treatment effectiveness, improving patient outcomes.

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Area of Science:

  • Hematology
  • Pharmacology
  • Medical Imaging

Background:

  • Secondary hemosiderosis treatment has evolved since 1962, initially relying on desferrioxamine (DFO) via subcutaneous infusion.
  • The development of oral iron chelators, like deferiprone (DFP), faced challenges but is now used for thalassemia major.
  • Recent advancements include new iron overload assessment methods and novel chelating agents, improving patient care.

Purpose of the Study:

  • To review the progress in iron chelation therapy for secondary hemosiderosis.
  • To highlight the efficacy of different chelating agents, including oral options.
  • To discuss the impact of new assessment methods on treatment strategies.

Main Methods:

  • Review of clinical research and drug development in iron chelation.
  • Utilizing cardiac T2 (*) MRI to assess myocardial siderosis.
  • Analysis of clinical trials comparing DFO, DFP, and deferasirox (DSX).

Main Results:

  • Cardiac T2 (*) MRI studies suggest deferiprone (DFP) is superior to desferrioxamine (DFO) for myocardial siderosis.
  • Combination therapy with DFO and DFP shows additive/synergistic effects for iron elimination.
  • Deferasirox (DSX) demonstrates good efficacy and tolerability in transfusional hemosiderosis.

Conclusions:

  • Patients now have a choice of three chelating agents: DFO, DFP, and DSX.
  • Tailored treatment strategies can lead to improved life expectancy and quality of life.
  • Ongoing research, particularly long-term studies on DSX, will further define optimal iron overload management.