Individuals at ultra-high risk for psychosis and those with schizophrenia exhibited increased microglial activity compared with healthy controls, suggesting a link between neuroinflammation and psychosis.
“While the pathoetiology of schizophrenia is not fully understood, there is increasing evidence for the involvement of neuroinflammatory processes. Microglia are the resident immune cells of the [central nervous system], and several lines of evidence indicate microglial involvement in the pathology of psychosis,” Peter S. Bloomfield, MSc, of Imperial College London, and colleagues wrote.
Researchers used second-generation radioligand [11C]PBR28 and positron emission tomography (PET) imaging to assess whether microglial activity is increased in unmedicated individuals at ultra-high risk for psychosis or those with schizophrenia after controlling for the rs6971 polymorphism in the gene encoding the 18kD translocator-protein. The primary outcome was total gray matter [11C]PBR28 binding ratio which represented microglial activity.
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