Life span, cancer and non-cancer diseases in mouse exposed to a continuous very low dose of gamma-irradiation.
Int J Radiat Biol
; 78(9): 845-55, 2002 Sep.
Article
en En
| MEDLINE
| ID: mdl-12428925
ABSTRACT
PURPOSE:
To analyse the life-span and pathologies of mice living under a continuous very low-dose gamma-irradiation. MATERIAL ANDMETHODS:
We exposed 300 C57B1/6J female mice, 3 weeks old, to 10 cGy year(-1) gamma-rays while 300 control mice lived in the same room. Irradiation was delivered continuously by thorium nitrate. We kept all the animals until natural death and performed autopsy.RESULTS:
No difference was observed in life-span (mean lifespan +/-SE 805.2 +/- 9.62 days for controls and 815 +/- 9.57 days for irradiated mice), weight curves or food intake. At autopsy, cancer was present in 40.9% of controls and 37.9% of irradiated mice. They were mainly represented by lymphomas (23.7 and 24.9%) and histiocytic sarcomas (12.6 and 8.7%, respectively, for controls and irradiated mice). Vascular diseases occurred in 24.1% of controls and 23% of irradiated mice. Infections were present at autopsy in 14.1 and 12.3%, respectively, of controls and irradiated animals. No statistical difference was observed at the end of the experiment for cancer or non-cancer diseases between the two groups.CONCLUSION:
Continuous 10 cGy year(-1) gamma-irradiation had no adverse effect on malignant or non-malignant diseases in this strain of mouse.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedad
/
Rayos gamma
/
Longevidad
/
Neoplasias Inducidas por Radiación
Tipo de estudio:
Etiology_studies
Límite:
Animals
Idioma:
En
Revista:
Int J Radiat Biol
Asunto de la revista:
RADIOLOGIA
Año:
2002
Tipo del documento:
Article
País de afiliación:
Francia