New biological insights on the link between radiation exposure and breast cancer risk.
J Mammary Gland Biol Neoplasia
; 18(1): 3-13, 2013 Mar.
Article
em En
| MEDLINE
| ID: mdl-23325014
ABSTRACT
Radiation exposure is a well-documented risk factor for breast cancer in women. Compelling epidemiological evidence in different exposed populations around the world demonstrate that excess breast cancer increases with radiation doses above 10 cGy. Both frequency and type of breast cancer are affected by prior radiation exposure. Many epidemiological studies suggest that radiation risk is inversely related to age at exposure; exposure during puberty poses the greatest risk while exposures past the menopause appear to carry very low risk. These observations are supported by experimental studies in mice and rats, which together provide the basis for the pubertal 'window of susceptibility' hypothesis for carcinogenic exposure. One line of experimental investigation suggests that the pubertal epithelium is more sensitive because DNA damage responses are less efficient, an other suggests that radiation affects stem cells self-renewal. A recent line of investigation suggests that the irradiated microenvironment mediates cancer risk. Studying the biological basis for radiation effects provides potential routes for protection in vulnerable populations, which include survivors of childhood cancers, as well as insights into the biology for certain types of sporadic cancer.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
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Prevencao_e_fatores_de_risco
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Agentes_cancerigenos
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Saude_da_mulher
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Mama
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Tipos_de_cancer
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Mama
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Outros_tipos
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
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Saúde da Mulher
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Glândulas Mamárias Humanas
Tipo de estudo:
Etiology_studies
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Risk_factors_studies
Limite:
Animals
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Female
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Humans
Idioma:
En
Revista:
J Mammary Gland Biol Neoplasia
Assunto da revista:
NEOPLASIAS
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos