Iron metabolism and its detection through MRI in parkinsonian disorders: a systematic review

Area of Science:

• Neuroscience
• Radiology
• Neurology

Background:

• Iron deposition in the brain increases with age and is implicated in neurodegenerative diseases like Parkinson's disease (PD).
• The precise role of iron overload in dopaminergic neuronal death in PD remains unclear.
• Accurate assessment of brain iron content is crucial for understanding PD progression.

Purpose of the Study:

• To review and summarize current data on brain iron deposition in Parkinson's disease.
• To discuss the potential link between iron overload and neurodegeneration in PD.
• To highlight the utility of MRI techniques in assessing brain iron.

Main Methods:

• Review of existing literature on brain iron in PD.
• Discussion of magnetic resonance imaging (MRI) techniques for iron detection.
• Focus on T2*-weighted gradient-echo (GRE) and susceptibility-weighted imaging (SWI) sequences.

Main Results:

• Brain iron accumulation is a recognized feature in PD.
• MRI, particularly T2*-GRE and SWI, are valuable tools for visualizing iron in basal ganglia.
• Further research is needed to establish causality between iron overload and neuronal death in PD.

Conclusions:

• Brain iron deposition is a significant factor in Parkinson's disease.
• Advanced MRI techniques offer promising methods for evaluating brain iron.
• Understanding iron's role is key to unraveling PD pathogenesis.