Location | Phenotype |
Phenotype MIM number |
Inheritance |
Phenotype mapping key |
Gene/Locus |
Gene/Locus MIM number |
---|---|---|---|---|---|---|
17p13.1 | {Basal cell carcinoma 7} | 614740 | Autosomal dominant | 3 | TP53 | 191170 |
A number sign (#) is used with this entry because of evidence that susceptibility to basal cell carcinoma-7 (BCC7) is influenced by variation in the TP53 gene (191170) on chromosome 17p13.
For a general phenotypic description and a discussion of genetic heterogeneity of basal cell carcinoma, see BCC1 (605462).
To identify risk variants for cutaneous basal cell carcinoma, Stacey et al. (2011) performed a genomewide association study of 16 million SNPs identified through whole-genome sequencing of 457 Icelanders. They imputed genotypes for 41,675 Illumina SNP chip-typed Icelanders and their relatives. In the discovery phase, the strongest signal came from rs78378222C (191170.0041) (odds ratio (OR) = 2.36, p = 5.2 x 10(-17)), which has a frequency of 0.0192 in the Icelandic population. Stacey et al. (2011) then confirmed this association in non-Icelandic samples (OR = 1.75, p = 0.0060; overall OR = 2.16, p = 2.2 x 10(-20)). rs78378222 is in the 3-prime untranslated region of TP53 (191170) and changes the AATAAA polyadenylation signal to AATACA, resulting in impaired 3-prime-end processing of TP53 mRNA. Investigation of other tumor types identified associations of this SNP with prostate cancer (see 176807) (OR = 1.44, p = 2.4 x 10(-6)), glioma (OR = 2.35, p = 1.0 x 10(-5)), and colorectal adenoma (see 608812) (OR = 1.39, p = 1.6 x 10(-4)). There was no observed effect for breast cancer (see 114480).
Stacey, S. N., Sulem, P., Jonasdottir, A., Masson, G., Gudmundsson, J., Gudbjartsson, D. F., Magnusson, O. T., Gudjonsson, S. A., Sigurgeirsson, B., Thorisdottir, K., Ragnarsson, R., Benediktsdottir, K. R., and 92 others. A germline variant in TP53 polyadenylation signal confers cancer susceptibility. Nature Genet. 43: 1098-1103, 2011. [PubMed: 21946351] [Full Text: https://doi.org/10.1038/ng.926]