Increased fibrillar amyloid-{beta} burden in normal individuals with a family history of late-onset Alzheimer's.
Having a parent affected with late-onset Alzheimer's disease (LOAD) is a major risk factor among cognitively normal (NL) individuals. This (11)C-Pittsburgh Compound B (PiB)-PET study examines whether NL individuals with LOAD parents show increased fibrillar amyloid-beta (Abeta) deposition, a hallmark of Alzheimer's disease (AD) pathology and whether there are parent-of-origin effects. Forty-two 50- to 80-year-old NL persons were examined with PiB-PET. These individuals included 14 NL subjects with a maternal family history (FH) of LOAD (FHm), 14 NL subjects with a paternal FH (FHp), and 14 NL subjects with a negative family history of any dementia (FH-). Statistical parametric mapping and automated regions-of-interest were used to compare cerebral-to-cerebellar PiB standardized uptake value ratios, reflecting fibrillar Abeta burden, across groups. FH groups did not differ in age, gender, education, and apolipoprotein E (ApoE) status. NL FHm subjects showed higher PiB retention in AD-affected anterior and posterior cingulate cortex (PCC), precuneus, parietal, temporal, occipital, and frontal cortices, right basal ganglia, and thalamus, compared with FH- and FHp subjects. FHp subjects showed increased PiB retention in the PCC and frontal cortex, intermediate between FHm and FH- subjects. Results remained significant after controlling for age, gender, education, and ApoE status. Children of parents with LOAD, particularly those with affected mothers, have increased fibrillar Abeta load in AD-vulnerable regions compared with controls, perhaps accounting for the known increased risk for AD. Present findings may motivate further research on familial transmission and parent-of-origin effects in LOAD.
Mosconi
Lisa
L
New York University School of Medicine, New York, NY 10016, USA. lisa.mosconi@med.nyu.edu
Rinne
Juha O
JO
Tsui
Wai H
WH
Berti
Valentina
V
Li
Yi
Y
Wang
Huiyu
H
Murray
John
J
Scheinin
Noora
N
Någren
Kjell
K
Williams
Schantel
S
Glodzik
Lidia
L
De Santi
Susan
S
Vallabhajosula
Shankar
S
de Leon
Mony J
MJ
D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000000981:diagnostic imaging / Q000235:genetics* / Q000378:metabolism* / Q000473:pathology; D000682:Amyloid / Q000737:chemistry* / Q000378:metabolism*; D016229:Amyloid beta-Peptides / Q000737:chemistry* / Q000378:metabolism*; D000814:Aniline Compounds; D052160:Benzothiazoles; D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology; D002250:Carbon Radioisotopes; D016022:Case-Control Studies; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D013844:Thiazoles
C475519:2-(4'-(methylamino)phenyl)-6-hydroxybenzothiazole; D000682:Amyloid; D016229:Amyloid beta-Peptides; D000814:Aniline Compounds; D052160:Benzothiazoles; D002250:Carbon Radioisotopes; D019275:Radiopharmaceuticals; D013844:Thiazoles