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Abstract #0661

In vivo mapping of sodium homeostasis disturbances in individual ALS patients: a brain 23Na MRI study

Aude-Marie Grapperon1,2, Mohamed Mounir El Mendili2, Adil Maarouf2, Jean-Philippe Ranjeva2, Maxime Guye2, Annie Verschueren1, Shahram Attarian1, and Wafaa Zaaraoui2
1APHM, Hò‚pital de la Timone, Referral Centre for Neuromuscular Diseases and ALS, Marseille, France, 2Aix Marseille Univ, CNRS, CRMBM-CEMEREM, Marseille, France

Synopsis

Keywords: Other Neurodegeneration, Neurodegeneration, non-proton; sodium; ALS

Motivation: ALS is a neurodegenerative disease leading to progressive motor deficit and death within few years. There is an unmet need to identify non-invasive biomarkers at the individual level to predict disease progression.

Goal(s): To study disease severity at the individual level in ALS by mapping abnormal sodium homeostasis using brain 23Na-MRI.

Approach: 27 ALS patients were explored by brain 23Na-MRI. Individual map of abnormal total sodium concentration (TSC) was computed for each patient compared to a local database of 62 controls.

Results: This study mapping sodium homeostasis disturbances at the individual level in ALS patients evidenced association between TSC increase and disease severity.

Impact: This pilot study mapping sodium homeostasis disturbances at the individual level in ALS patients through 23Na-MRI evidenced association between TSC increase and disease severity and may be a future biomarker to help stratifying patients and evaluating new therapeutics.

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Keywords