Lucie Barateau, Anis Krache, Alexandre Da Costa, Michel Lecendreux, Rachel Debs, Sofiene Chenini, Nicolas Arlicot, Patrick Vourc'h, Elisa Evangelista, Mathieu Alonso, Anne-Sophie Salabert, Stein Silva, Séverine Béziat, Isabelle Jaussent, Denis Mariano-Goulart, Pierre Payoux, Yves Dauvilliers
BACKGROUND AND OBJECTIVES: Narcolepsy type 1 (NT1) is due to the loss of hypothalamic neurons that produce orexin (ORX), by a suspected immune-mediated process. Rare postmortem studies are available and failed to detect any inflammation in the hypothalamic region, but these brains were collected years after the first symptoms. In vivo studies close to disease onset are lacking. We aimed to explore microglia density in the hypothalamus and thalamus in NT1 compared with controls using [18 F]DPA-714 PET and to study in NT1 the relationships between microglia density in the hypothalamus and in other regions of interest (ROIs) with disease duration, severity, and ORX levels...
May 2024: Neurology