Glutathione S-transferase omega-1 modifies age-at-onset of Alzheimer disease and Parkinson disease.
We previously reported genetic linkage of loci controlling age-at-onset in Alzheimer disease (AD) and Parkinson's disease (PD) to a 15 cM region on chromosome 10q. Given the large number of genes in this initial starting region, we applied the process of 'genomic convergence' to prioritize and reduce the number of candidate genes for further analysis. As our second convergence factor we performed gene expression studies on hippocampus obtained from AD patients and controls. Analysis revealed that four of the genes [stearoyl-CoA desaturase; NADH-ubiquinone oxidoreductase 1 beta subcomplex 8; protease, serine 11; and glutathione S-transferase, omega-1 (GSTO1)] were significantly different in their expression between AD and controls and mapped to the 10q age-at-onset linkage region, the first convergence factor. Using 2814 samples from our AD dataset (1773 AD patients) and 1362 samples from our PD dataset (635 PD patients), allelic association studies for age-at-onset effects in AD and PD revealed no association for three of the candidates, but a significant association was found for GSTO1 (P=0.007) and a second transcribed member of the GST omega class, GSTO2 (P=0.005), located next to GSTO1. The functions of GSTO1 and GSTO2 are not well understood, but recent data suggest that GSTO1 maybe involved in the post-translational modification of the inflammatory cytokine interleukin-1beta. This is provocative given reports of the possible role of inflammation in these two neurodegenerative disorders.
Li
Yi-Ju
YJ
Department of Medicine, Center for Human Genetics, Institute for Genome Science and Policy, Duke University Medical Center, Box 3445, Durham, NC 27710, USA. yiju.li@duke.edu
Oliveira
Sofia A
SA
Xu
Puting
P
Martin
Eden R
ER
Stenger
Judith E
JE
Scherzer
Clemens R
CR
Hauser
Michael A
MA
Scott
William K
WK
Small
Gary W
GW
Nance
Martha A
MA
Watts
Ray L
RL
Hubble
Jean P
JP
Koller
William C
WC
Pahwa
Rajesh
R
Stern
Mathew B
MB
Hiner
Bradley C
BC
Jankovic
Joseph
J
Goetz
Christopher G
CG
Mastaglia
Frank
F
Middleton
Lefkos T
LT
Roses
Allen D
AD
Saunders
Ann M
AM
Schmechel
Donald E
DE
Gullans
Steven R
SR
Haines
Jonathan L
JL
Gilbert
John R
JR
Vance
Jeffery M
JM
Pericak-Vance
Margaret A
MA
Hulette
Christine
C
Welsh-Bohmer
Kathleen A
KA
D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000201:enzymology* / Q000235:genetics; D002874:Chromosome Mapping; D002879:Chromosomes, Human, Pair 10; D005260:Female; D005982:Glutathione Transferase / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D015810:Linkage Disequilibrium; D008126:Lod Score; D008297:Male; D008875:Middle Aged; D020411:Oligonucleotide Array Sequence Analysis; D010300:Parkinson Disease / Q000201:enzymology* / Q000235:genetics; D020641:Polymorphism, Single Nucleotide
C490476:GSTO1 protein, human; D005982:Glutathione Transferase