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Abstract #1710

Validation of Diffusion MRI Biomarkers of Peripheral Nerve Degeneration in ALS

Margaret M. McCann1,2, Ethan Mathew1,3, Alberto Fuentes1, Samuel G. Ferrante1, Charles Quarles4, Richard D. Dortch1, and Gregory Turner1
1Translational Neuroscience, Barrow Neurological Institute, Phoenix, AZ, United States, 2Biomedical Sciences, Creighton University, Omaha, NE, United States, 3School of Biological and Health System Engineering, Arizona State University, Phoenix, AZ, United States, 4Cancer Systems Imaging, University of Texas MD Anderson Cancer Center, Houston, TX, United States

Synopsis

Keywords: Nerves, Diffusion Tensor ImagingALS is a fatal, neurodegenerative disease that affects motor neurons. Assessment of disease progression is difficult and relies on tests that lack specificity/responsiveness. While imaging biomarkers may meet this need, previous work has focused on the motor neurons or skeletal muscles, with nerves that form the link between these tissues being largely understudied. Previous studies suggest DTI in human nerves may be sensitive to nerve degeneration in ALS and here we sought to validate these measures in a rat model. Preliminary findings showed a progressive decrease in FA, which correlated to the onset of motor neuron loss and muscle wasting.

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