PTCH codon 1315 polymorphism and risk for nonmelanoma skin cancer

The British Journal of Dermatology
A AsplundF Pontén

Abstract

The PTCH tumour suppressor gene is involved in the development of nearly all basal cell carcinomas (BCCs) of the skin and a fraction of squamous cell carcinomas (SCCs). A nonconservative Pro/Leu nucleotide polymorphism within PTCH exon 23 at codon 1315 was recently reported to be potentially important for the development of breast epithelial cell cancers. Objectives Accordingly, the status of PTCH codon 1315 was analysed for a possible association with the development of nonmelanoma skin cancers (NMSCs) in a pilot study. Because skin cancer risk is affected by specific population-dependent phenotypes such as skin and hair colour, codon 1315 was also analysed for normal allele frequency variation in human populations having differing extents of eumelanin vs. phaeomelanin. The single nucleotide polymorphism in codon 1315 of the human PTCH gene was analysed in genomic DNA from six different populations comprising 472 blood samples and from 170 patients in four different categories with NMSC. Polymerase chain reaction and pyrosequencing were used to determine the allele frequencies. Allelic loss was furthermore determined in tumours following microdissection. The Pro/Pro genotype frequency ranged from 30% to 65% between populations...Continue Reading

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Related Concepts

Pigmented Basal Cell Carcinoma
Squamous Cell Carcinoma
Sense Codon
Neoplasm Proteins
Pilot Projects
Hormone Receptors, Cell Surface
Malignant Neoplasm of Skin
Skin Pigmentation
Nested Polymerase Chain Reaction
Loss of Heterozygosity

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