Imaging of neuroinflammation in migraine with aura: A [11C]PBR28 PET/MRI study.

Albrecht DS., Mainero C., Ichijo E., Ward N., Granziera C., Zürcher NR., Akeju O., Bonnier G., Price J., Hooker JM., Napadow V., Loggia ML., Hadjikhani N.

OBJECTIVE: To determine if migraine with aura is associated with neuroinflammation, which has been suggested by preclinical models of cortical spreading depression (CSD) as well as imaging of human pain conditions. METHODS: Thirteen migraineurs with aura and 16 healthy controls received integrated PET/MRI brain scans with [11C]PBR28, a radioligand that binds to the 18 kDa translocator protein, a marker of glial activation. Standardized uptake value ratio (SUVR) was compared between groups, and regressed against clinical variables, using region of interest and whole-brain voxelwise analyses. RESULTS: Compared to healthy controls, migraineurs demonstrated SUVR elevations in nociceptive processing areas (e.g., thalamus and primary/secondary somatosensory and insular cortices) as well as in areas previously shown to be involved in CSD generation (visual cortex). SUVR levels in frontoinsular cortex, primary/secondary somatosensory cortices, and basal ganglia were correlated with frequency of migraine attacks. CONCLUSIONS: These findings demonstrate that migraine with aura is associated with neuroimmune activation/neuroinflammation, and support a possible link between CSD and glial activation, previously observed in animals.

DOI

10.1212/WNL.0000000000007371

Type

Journal article

Journal

Neurology

Publication Date

23/04/2019

Volume

92

Pages

e2038 - e2050

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