Unveiling the Iron-Dopamine Link in Schizophrenia: Insights from QSM MRI and PET Imaging

Highlight

• Schizophrenia is associated with reduced non-neuromelanin-bound brain iron in the substantia nigra and ventral tegmental area (SN-VTA).
• Lower magnetic susceptibility indicating decreased iron correlates with elevated striatal dopamine synthesis measured by [18F]-DOPA PET.
• These findings support a mechanistic link between brain iron deficiency and hyperdopaminergia in schizophrenia pathology, particularly in early-course patients.
• The study leveraged quantitative susceptibility mapping (QSM) MRI, neuromelanin-sensitive MRI (NM-MRI), diffusion tensor imaging (DTI), and PET to dissect iron, neuromelanin, and myelin contributions.

Study Background