Abstract #2903

GluCEST imaging: a relevant biomarker of Huntington’s disease.

Jérémy Pépin^1,2, Laetitia Francelle^1,2, Maria-Angeles Carillo-de Sauvage^1,2, Huu Phuc Nguyen^3,4, Nicole El Massioui^5,6, Valérie Doyère^5,6, Emmanuel Brouillet^1,2, and Julien Flament^1,7

¹CEA/DSV/I2BM/MIRCen, Fontenay-aux-Roses, France, ²CNRS Université Paris-Saclay UMR 9199, Fontenay-aux-Roses, France, ³Institute of Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany, ⁴Centre for Rare Diseases, University of Tuebingen, Tuebingen, Germany, ⁵Paris-Saclay Institute of Neuroscience, Université Paris-Sud, UMR 9197, Orsay, France, ⁶Centre National de la Recherche Scientifique, Orsay, France, ⁷INSERM UMS 27, Fontenay-aux-Roses, France

Huntington’s disease (HD) is an inherited neurodegenerative disease characterized by motor, cognitive and psychiatric symptoms. As glutamate has been shown to be a potential biomarker of neurodegenerative diseases, we used Chemical Exchange Saturation Transfer imaging of glutamate (gluCEST) to map cerebral glutamate distribution in mouse and rat models of HD. A decrease of [Glu] was measured in the striatum by MRS and gluCEST. In addition, good spatial resolution of gluCEST over MRS allowed identification of other afflicted brain regions such as corpus callosum. These results demonstrate the potential of gluCEST in providing relevant biomarkers of HD in the whole brain.

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