Specific and non-specific binding of a tracer for the translocator-specific protein in schizophrenia: an [11C]-PBR28 blocking study.

ABSTRACT:

Objective

The mitochondrial 18-kDa translocator protein (TSPO) is expressed by activated microglia and positron emission tomography enables the measurement of TSPO levels in the brain. Findings in schizophrenia have shown to vary depending on the outcome measure used and this discrepancy in TSPO results could be explained by lower non-displaceable binding (V_ND) in schizophrenia, which could obscure increases in specific binding. In this study, we have used the TSPO ligand XBD173 to block the TSPO radioligand [¹¹C]-PBR28 and used an occupancy plot to quantify V_ND in patients with schizophrenia.

Methods

A total of 7 patients with a diagnosis of schizophrenia were recruited for this study. Each patient received two separate PET scans with [

SUBMITTER: Marques TR 

PROVIDER: S-EPMC8440284 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature