Parkinson's disease (PD) is associated with aberrant innate immune responses, including microglial activation and infiltration of peripheral myeloid cells into the central nervous system (CNS). Methods to investigate innate immune activation in PD are limited and have not yet elucidated key interactions between neuroinflammation and peripheral inflammation. Translocator protein 18 kDa (TSPO) PET is a widely evaluated imaging approach for studying activated microglia and peripheral myeloid lineage cells in vivo but has yet to be fully explored in PD.
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