Assuntos
Carcinoma Basocelular/metabolismo , Carcinoma de Células Escamosas/metabolismo , Reparo do DNA , Anemia de Fanconi/genética , Regulação Neoplásica da Expressão Gênica , Melanoma/metabolismo , Neoplasias Cutâneas/metabolismo , Regulação para Cima , Carcinoma Basocelular/genética , Carcinoma de Células Escamosas/genética , Dano ao DNA , Proteína do Grupo de Complementação C da Anemia de Fanconi/metabolismo , Proteína do Grupo de Complementação D2 da Anemia de Fanconi/metabolismo , Proteína do Grupo de Complementação L da Anemia de Fanconi/metabolismo , Proteínas de Grupos de Complementação da Anemia de Fanconi/genética , Humanos , Melanoma/genética , Análise de Sequência com Séries de Oligonucleotídeos , Neoplasias Cutâneas/genética , Raios UltravioletaRESUMO
BACKGROUND: UV radiation is a risk factor for nonmelanoma skin cancer (NMSC). The relation between DNA damage and oncogenesis suggests that diminished DNA repair capacity (DRC) is involved in tumorigenesis. OBJECTIVE: The purpose of this study was to test the hypothesis that a low DRC is a susceptibility factor for the development of NMSC in Puerto Rico. METHODS: A case-control retrospective clinical study was done to compare the age-adjusted DRC in participants with and without NMSC. DRC was measured using a host cell reactivation assay with a luciferase reporter gene irradiated with UV light and transfected into human peripheral lymphocytes. An epidemiologic questionnaire was used to solicit risk factors. RESULTS: The mean (+/-2 SE) DRC of 177 control patients without skin cancer was 8.6% +/- 0.7. Participants (280) with NMSC had a 42% lower DRC (5.0% +/- 0.3). CONCLUSION: A low DRC is a susceptibility factor for NMSC.