TERT Promoter Mutations in Skin Cancer: The Effects of Sun Exposure and X-Irradiation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Helena Populo (Autor) Outra; Paula Boaventura (Autor) Outra; Joao Vinagre (Autor) Outra; Rui Batista (Autor) Outra; Adelia Mendes (Autor) Outra; Regina Caldas (Autor) Outra; Joana Pardal (Autor) Outra; Filomena Azevedo (Autor) Outra; Mrinalini Honavar (Autor) Outra; Isabel Guimaraes (Autor) Outra; Lopes, JM (Autor) FMUP; Manuel Sobrinho Simoes (Autor) Outra; Paula Soares (Autor) FMUP

Revista

Título: Journal of Investigative Dermatology

Vol. 134

Páginas: 2251-2257

ISSN: 0022-202X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 104 Citações

Scopus - 106 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina clínica

Outras Informações

ID Authenticus: P-009-MRN

DOI: 10.1038/jid.2014.163

Abstract (EN): The reactivation or reexpression of telomerase (TERT) is a widespread feature of neoplasms. TERT promoter mutations were recently reported that were hypothesized to result from UV radiation. In this retrospective study, we assessed TERT promoter mutations in 196 cutaneous basal cell carcinomas (BCCs), including 102 tumors from X-irradiated patients, 94 tumors from patients never exposed to ionizing radiation treatment, and 116 melanomas. We sought to evaluate the effects of UV and X-ray irradiation on TERT mutation frequency. TERT mutations were detected in 27% of BCCs from X-irradiated patients, 51% of BCCs from nonirradiated patients, and 22% of melanoma patients. TERT mutations were significantly increased in non-X-irradiated BCC patients compared with X-irradiated BCC patients; the mutations also presented a different mutation signature. In nonirradiated patients, TERT mutations were more frequent in BCCs of sun-exposed skin, supporting a possible causative role of UV radiation. In melanoma, TERT promoter mutations were generally restricted to intermittent sun-exposed areas and were associated with nodular and superficial spreading subtypes, increased thickness, ulceration, increased mitotic rate, and BRAFV600E mutations. Our results suggest that various carcinogenic factors may cause distinct TERT promoter mutations in BCC and that TERT promoter mutations might be associated with a poorer prognosis in melanoma.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7