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Effects of aging on 5-HT(2A) R binding: a HRRT PET study with and without partial volume corrections.

Authors :
Uchida H
Chow TW
Mamo DC
Kapur S
Mulsant BH
Houle S
Pollock BG
Graff-Guerrero A
Uchida, Hiroyuki
Chow, Tiffany W
Mamo, David C
Kapur, Shitij
Mulsant, Benoit H
Houle, Sylvain
Pollock, Bruce G
Graff-Guerrero, Ariel
Source :
International Journal of Geriatric Psychiatry; Dec2011, Vol. 26 Issue 12, p1300-1308, 9p
Publication Year :
2011

Abstract

<bold>Objective: </bold>We explored whether prior findings of reduction in serotonin 2A receptor (5-HT(2A) R) binding with age could be replicated and whether high resolution research tomography (HRRT) for positron emission tomography could compensate for partial volume effects in the presence of age-related brain atrophy, which has been a traditional concern for radioligand PET studies in the elderly. <bold>Methods: </bold>We derived 5-HT(2A) R nondisplaceable binding potentials (BP(ND) ) in frontal, temporal, anterior-cingulate, insula, caudate and putamen volumes of interest (VOIs) for 28 healthy subjects (mean ± SD age = 43.9 ± 17.0 years, range: 19-78 years) using HRRT. Partial volume correction (PVC) was performed in the VOI analysis. <bold>Results: </bold>The 5-HT(2A) R BP(ND) s decreased with age, a relationship best described by an exponential-decay regression. The BP(ND) s were found to be consistent before and after PVC, with an intra-class correlation coefficient of 0.84 and 95% confidence interval = 0.78-0.88. <bold>Conclusions: </bold>These new findings update current knowledge, in that the aging process is not always uniform across the life span and suggest that PVC may not be necessary with HRRT in healthy subjects. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08856230
Volume :
26
Issue :
12
Database :
Complementary Index
Journal :
International Journal of Geriatric Psychiatry
Publication Type :
Academic Journal
Accession number :
104596996
Full Text :
https://doi.org/10.1002/gps.2682