Insight in glioma susceptibility through an analysis of 6p22.3, 12p13.33-12.1, 17q22-23.2 and 18q23 SNP genotypes in familial and non-familial glioma.
The risk of glioma has consistently been shown to be increased twofold in relatives of patients with primary brain tumors (PBT). A recent genome-wide linkage study of glioma families provided evidence for a disease locus on 17q12-21.32, with the possibility of four additional risk loci at 6p22.3, 12p13.33-12.1, 17q22-23.2, and 18q23. To identify the underlying genetic variants responsible for the linkage signals, we compared the genotype frequencies of 5,122 SNPs mapping to these five regions in 88 glioma cases with and 1,100 cases without a family history of PBT (discovery study). An additional series of 84 familial and 903 non-familial cases were used to replicate associations. In the discovery study, 12 SNPs showed significant associations with family history of PBT (P < 0.001). In the replication study, two of the 12 SNPs were confirmed: 12p13.33-12.1 PRMT8 rs17780102 (P = 0.031) and 17q12-21.32 SPOP rs650461 (P = 0.025). In the combined analysis of discovery and replication studies, the strongest associations were attained at four SNPs: 12p13.33-12.1 PRMT8 rs17780102 (P = 0.0001), SOX5 rs7305773 (P = 0.0001) and STKY1 rs2418087 (P = 0.0003), and 17q12-21.32 SPOP rs6504618 (P = 0.0006). Further, a significant gene-dosage effect was found for increased risk of family history of PBT with these four SNPs in the combined data set (P(trend) <1.0 × 10(-8)). The results support the linkage finding that some loci in the 12p13.33-12.1 and 17q12-q21.32 may contribute to gliomagenesis and suggest potential target genes underscoring linkage signals.
Dan L Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
Yanhong
Y
Liu
Beatrice S
BS
Melin
Preetha
P
Rajaraman
Zhaoming
Z
Wang
Martha
M
Linet
Sanjay
S
Shete
Christopher I
CI
Amos
Ching C
CC
Lau
Michael E
ME
Scheurer
Spiridon
S
Tsavachidis
Georgina N
GN
Armstrong
Richard S
RS
Houlston
Fay J
FJ
Hosking
Elizabeth B
EB
Claus
Jill
J
Barnholtz-Sloan
Rose
R
Lai
Dora
D
Il'yasova
Joellen
J
Schildkraut
Siegal
S
Sadetzki
Christoffer
C
Johansen
Jonine L
JL
Bernstein
Sara H
SH
Olson
Robert B
RB
Jenkins
Daniel
D
LaChance
Nicholas A
NA
Vick
Margaret
M
Wrensch
Faith
F
Davis
Bridget J
BJ
McCarthy
Ulrika
U
Andersson
Patricia A
PA
Thompson
Stephen
S
Chanock
Melissa L
ML
Bondy
D000293:Adolescent; D000328:Adult; D001932:Brain Neoplasms / Q000235:genetics*; D002874:Chromosome Mapping; D005260:Female; D020022:Genetic Predisposition to Disease; D005910:Glioma / Q000235:genetics*; D006239:Haplotypes; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide