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Increased Subcortical Sodium Levels in Patients with Progressive Supranuclear Palsy.

Jannik Prasuhn1,2,3, Martin Göttlich2,3, Sinja S Großer1,2,3

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Total and intracellular-weighted sodium imaging (23Na-MRI) shows increased brainstem sodium in progressive supranuclear palsy (PSP) patients, correlating with disease severity. This technique aids in diagnosing PSP and understanding neurodegeneration.

Keywords:
23Na-MRIPSPheteronuclear MRIneurodegenerationprogressive supranuclear palsy

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Area of Science:

  • Neuroimaging
  • Neurology
  • Biophysics

Background:

  • Progressive supranuclear palsy (PSP) is a severe neurodegenerative disease.
  • Investigating neurodegeneration in vivo is crucial for understanding PSP.
  • Total and intracellular-weighted sodium imaging (23Na-MRI) is an emerging technique for in vivo neuroimaging.

Purpose of the Study:

  • To evaluate the utility of 23Na-MRI in patients with PSP.
  • To identify specific sodium changes associated with PSP pathophysiology.
  • To correlate sodium levels with disease severity in PSP.

Main Methods:

  • Recruited 10 PSP patients and 20 healthy controls.
  • Performed neurological examinations and structural MRI.
  • Conducted total and intracellular-weighted 23Na-MRI on all subjects.
  • Utilized voxel-wise and region-of-interest (ROI) analyses.

Main Results:

  • Voxel-wise analysis revealed increased brainstem total sodium content in PSP patients.
  • Increased brainstem sodium levels correlated significantly with PSP disease severity.
  • ROI-wise analysis identified additional sodium alterations in PSP-implicated brain regions.

Conclusions:

  • 23Na-MRI offers significant advantages for diagnosing PSP.
  • This imaging modality provides complementary insights into PSP-related neurodegenerative changes.
  • 23Na-MRI can help elucidate the underlying pathophysiology of PSP.