Do MDM2 SNP309 and TP53 R72P interact in breast cancer susceptibility? A large pooled series from the breast cancer association consortium.
Association studies in large series of breast cancer patients can be used to identify single-nucleotide polymorphisms (SNP) contributing to breast cancer susceptibility. Previous studies have suggested associations between variants in TP53 (R72P) and MDM2 (SNP309) and cancer risk. Data from molecular studies suggest a functional interaction between these genes. We therefore investigated the effect of TP53 R72P and MDM2 SNP309 on breast cancer risk and age at onset of breast cancer in a pooled series of 5,191 cases and 3,834 controls from the Breast Cancer Association Consortium (BCAC). Breast cancer risk was not found to be associated with the combined variant alleles [odds ratio (OR), 1.00; 95% confidence interval (95% CI), 0.81-1.23]. Estimated ORs were 1.01 (95% CI, 0.93-1.09) per MDM2 SNP309 allele and 0.98 (95% CI, 0.91-1.04) for TP53 R72P. Although we did find evidence for a 4-year earlier age at onset for carriers of both variant alleles in one of the breast cancer patient series of the BCAC (the German series), we were not able to confirm this effect in the pooled analysis. Even so, carriers of both variant alleles did not have different risk estimates for bilateral or estrogen receptor-positive breast cancer. In conclusion, in this large collaborative study, we did not find an association of MDM2 SNP309 and TP53 R72P, separately or in interaction, with breast cancer. This suggests that any effect of these two variants would be very small and possibly confined to subgroups that were not assessed in our present study.
Schmidt
Marjanka K
MK
Netherlands Cancer Institute, Amsterdam, the Netherlands.
Reincke
Scarlett
S
Broeks
Annegien
A
Braaf
Linde M
LM
Hogervorst
Frans B L
FB
Tollenaar
Rob A E M
RA
Johnson
Nichola
N
Fletcher
Olivia
O
Peto
Julian
J
Tommiska
Johanna
J
Blomqvist
Carl
C
Nevanlinna
Heli A
HA
Healey
Catherine S
CS
Dunning
Alison M
AM
Pharoah
Paul D P
PD
Easton
Douglas F
DF
Dörk
Thilo
T
Van't Veer
Laura J
LJ
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000235:genetics* / Q000378:metabolism; D016022:Case-Control Studies; D005260:Female; D016158:Genes, p53 / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006801:Humans; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D051736:Proto-Oncogene Proteins c-mdm2 / Q000235:genetics*; D011960:Receptors, Estrogen / Q000096:biosynthesis
D011960:Receptors, Estrogen; C497206:MDM2 protein, human; D051736:Proto-Oncogene Proteins c-mdm2