Pathophysiological and clinical aspects of iron chelation therapy in MDS

Norbert Gattermann1

  • 1Department of Hematology, Oncology and Clinical Immunology, Heinrich-Heine-University, Düsseldorf, Germany. gattermann@med.uni-duesseldorf.de

Insights

Patients with myelodysplastic syndromes (MDS) often develop iron overload from transfusions and increased iron absorption. This review covers iron overload

Area of Science:

  • Hematology
  • Oncology
  • Iron Metabolism

Background:

  • Myelodysplastic syndromes (MDS) frequently lead to transfusion dependence and subsequent iron overload.
  • Ineffective erythropoiesis in MDS also increases dietary iron absorption, exacerbating iron overload.
  • Clinical complications and survival impact of iron overload in MDS are less understood than in thalassemia.

Purpose of the Study:

  • To review the adverse effects of transfusional iron overload in myelodysplastic syndromes.
  • To discuss risks of iron-induced oxidative stress and diagnostic tools for iron overload.
  • To outline current iron chelation therapies and the role of labile plasma iron (LPI) monitoring.

Main Methods:

  • Literature review synthesizing current knowledge on iron overload in MDS.
  • Analysis of risks associated with iron accumulation and oxidative stress.
  • Evaluation of diagnostic methods and therapeutic strategies, including iron chelation.

Main Results:

  • Transfusional iron overload is a significant complication in MDS patients.
  • Iron overload contributes to oxidative stress and potential clinical complications.
  • Various diagnostic tools and iron chelators are available for management.

Conclusions:

  • Effective management of iron overload is crucial for patients with MDS.
  • Iron chelation therapy and monitoring labile plasma iron (LPI) are key strategies.
  • Further research is needed to fully elucidate the impact of iron overload on MDS survival.

Related Concept Videos

Chronic Kidney Disease II: Clinical Manifestations01:24

Chronic Kidney Disease II: Clinical Manifestations

Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
The Periodic Table and Organismal Elements00:57

The Periodic Table and Organismal Elements

OverviewElements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally-occurring, and fewer still are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.The Periodic Table Provides Information...
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
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...
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
Therapeutic Drug Monitoring: Affecting Factors01:29

Therapeutic Drug Monitoring: Affecting Factors

Therapeutic Drug Monitoring (TDM) is the clinical practice of measuring specific drug levels in a patient's blood or body tissues to manage and optimize therapy. TDM is crucial for drugs with narrow therapeutic windows, like warfarin and phenytoin, where incorrect doses can lead to treatment failure or severe side effects. This monitoring ensures the dosage administered is within a safe and effective range. The factors affecting therapeutic drug monitoring include:Patient-Specific Factors:a.