Building a database for brain 18 kDa translocator protein imaged using [11 C]PBR28 in healthy subjects

Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism
Soumen PaulMasahiro Fujita

Abstract

Translocator protein 18 kDa (TSPO) has been widely imaged as a marker of neuroinflammation using several radioligands, including [11C]PBR28. In order to study the effects of age, sex, and obesity on TSPO binding and to determine whether this binding can be accurately assessed using fewer radio high-performance liquid chromatography (radio-HPLC) measurements of arterial blood samples, we created a database of 48 healthy subjects who had undergone [11C]PBR28 scans (23 high-affinity binders (HABs) and 25 mixed-affinity binders (MABs), 20 F/28 M, age: 40.6 ± 16.8 years). After analysis by Logan plot using 23 metabolite-corrected arterial samples, total distribution volume ( VT) was found to be 1.2-fold higher in HABs across all brain regions. Additionally, the polymorphism plot estimated nondisplaceable uptake ( VND) as 1.40 mL · cm-3, which generated a specific-to-nondisplaceable ratio ( BPND) of 1.6 ± 0.6 in HABs and 1.1 ± 0.6 in MABs. VT increased significantly with age in nearly all regions and was well estimated with radio-HPLC measurements from six arterial samples. However, VT did not correlate with body mass index and was not affected by sex. These results underscore which patient characteristics should be accounted for dur...Continue Reading

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Citations

Jun 4, 2019·European Journal of Nuclear Medicine and Molecular Imaging·Paolo Zanotti-FregonaraJoseph C Masdeu
May 30, 2019·Molecular Psychiatry·D S AlbrechtM L Loggia
Aug 1, 2019·European Journal of Nuclear Medicine and Molecular Imaging·Jouni TuiskuSimon Cervenka
Jan 13, 2021·European Journal of Nuclear Medicine and Molecular Imaging·Erik NutmaBenjamin B Tournier
Aug 1, 2021·Clinical and Experimental Immunology·Wissam BeainoAlbert D Windhorst

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SPSS Statistics
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PNEURO
SPSS
GraphPad
Ichise
SPM
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