Related Experiment Videos
p53 gene mutations in skin cancers with underlying disorders
T Kanekura1, T Kanzaki, S Kanekura
1Department of Dermatology, Kagoshima University Faculty of Medicine, Japan.
Journal of Dermatological Science
|May 1, 1995
Summary
p53 gene mutations are common in human cancers. This study found limited p53 mutations in skin cancers, suggesting UV light is not always crucial, especially with underlying skin disorders.
Area of Science:
- Oncology
- Genetics
- Dermatology
Background:
- Mutations in the p53 tumor suppressor gene are frequent in human cancers.
- A link between p53 gene mutations and ultraviolet (UV) light exposure is established in skin cancers from sun-exposed areas.
Purpose of the Study:
- To investigate p53 gene mutations in various skin cancers.
- To explore the role of UV radiation in p53 mutations in the context of specific skin conditions.
Main Methods:
- Genomic DNA from 12 skin cancers (8 basal cell carcinomas, 4 squamous cell carcinomas) was analyzed.
- Polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and DNA sequencing were used to screen exons 5-9 of the p53 gene.
Main Results:
- A single p53 gene mutation was detected in one squamous cell carcinoma arising from actinic keratosis.
- The identified mutation (GCC to CCC at codon 159, exon 5) resulted in an alanine to proline amino acid change.
- This specific mutation did not align with previously reported UV mutagenesis patterns.
Conclusions:
- p53 gene mutations and UV exposure are important in some skin cancer development.
- Their role may be less critical in skin cancers associated with underlying skin disorders.