Neuroinflammation in bipolar disorder - A [(11)C]-(R)-PK11195 positron emission tomography study.
Brain Behav Immun
; 40: 219-25, 2014 Aug.
Article
em En
| MEDLINE
| ID: mdl-24703991
ABSTRACT
BACKGROUND:
The "monocyte-T-cell theory of mood disorders" regards neuroinflammation, i.e. marked activation of microglia, as a driving force in bipolar disorder. Microglia activation can be visualized in vivo using [(11)C]-(R)-PK11195 PET. Indirect evidence suggests the hippocampus as a potential focus of neuroinflammation in bipolar disorder. We aim to determine if there is increased [(11)C]-(R)-PK11195 binding to activated microglia in the hippocampus of patients with bipolar I disorder when compared to healthy controls. MATERIAL ANDMETHODS:
Fourteen patients with bipolar I disorder and eleven healthy controls were included in the analyses. Dynamic 60-min PET scans were acquired after the injection of [(11)C]-(R)-PK11195. All subjects underwent psychiatric interviews as well as an MRI scan, which was used for anatomic co-registration in the data analysis. The data from the PET scans was analyzed with a two-tissue-compartment model to calculate the binding potential, using the metabolite-corrected plasma and blood curve as input.RESULTS:
A significantly increased [(11)C]-(R)-PK11195 binding potential, which is indicative of neuroinflammation, was found in the right hippocampus of the patients when compared to the healthy controls (1.66 (CI 1.45-1.91) versus 1.33 (CI 1.16-1.53); p=0.033, respectively). Although the same trend was observed in the left hippocampus, this difference was not statistically significant.CONCLUSION:
This study is the first to demonstrate the presence of focal neuroinflammation in the right hippocampus in bipolar I disorder.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Transtorno Bipolar
/
Encefalite
/
Hipocampo
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article