Different Signals of Magnetic Resonance Imaging and Ultrasound from Substantia Nigra in Parkinson's Disease and Control - Is Iron the Cause?

• Authors: K. Szlachta , K. Sadowski , R. Kuliński , J. Gałązka-Friedman , A. Friedman
• Languages of publication: EN

Abstracts

EN

Motor symptoms of Parkinson's disease are caused by a progressive degeneration of substantia nigra, a small structure located deep in the brain. The cause of this process is unknown but may be related to iron mediated oxidative stress. The aim of this study was to understand the mechanism of the change of magnetic resonance and ultrasound signals found in patients with Parkinson's disease, which were attributed by several authors to an important increase of the concentration of iron in substantia nigra. USG and MRI measurements were performed on phantoms simulating human brain to which high amounts of iron were introduced. The USG signal was unaffected by insertion of iron-loaded ferritin, while it was by insertion of glial tissue. Injections of iron-loaded ferritin and iron ions to the phantoms decreased T_2 relaxation time. Our results suggest that the observed change of the signal from Parkinsonian brains is probably due to a proliferation of glia and not to an increase of the concentration of iron.

Keywords

EN

87.19.L-

Discipline

• 87.19.L-: Neuroscience

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 2
• Pages: 454-456

Dates

published

2012-02

Contributors

author

K. Szlachta

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

K. Sadowski

• Department of Neurology, Medical University in Warsaw, Warsaw, Poland

author

R. Kuliński

• Department of Nuclear Medicine and Magnetic Resonance, Bródno Regional Hospital, Warsaw, Poland

author

J. Gałązka-Friedman

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

A. Friedman

• Department of Neurology, Medical University in Warsaw, Warsaw, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.121.454