The effect of a water-dispersible beta-carotene formulation on the prevention of age-related lymphoid neoplasms in mice.
Anticancer Res
; 22(2A): 883-8, 2002.
Article
em En
| MEDLINE
| ID: mdl-12014666
ABSTRACT
There is currently a great interest in the efficiency of micronutrients against age-associated disorders. The present study aimed to evaluate the efficacy of beta-carotene on the incidence of lymphoid neoplasia, a fatal pathology associated with OFI mouse ageing. Beta-carotene, given as a water-dispersible preparation to 8-month-old mice, on a four month follow-up study, significantly reduced the incidence of neoplasm (12.5% versus 50% for controls). Evaluation of the parameters of oxidative stress showed a highly-significant reduction of the antioxidant defenses in the liver of cancer mice when compared to healthy controls (78% decrease in GSH-Px activity and 47% decrease of the ratio GSH/GSSG). Liver GSH-Px activity was 35% higher in old than in young mice, which correlated with higher (41%) plasma Se level. In conclusion beta-carotene improved the antioxidant status of the mice, causing a 4.5-fold increase in the liver GSH/GSSG ratio, an effect which was probably responsible for the lowered incidence of neoplasia observed.
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Base de dados:
MEDLINE
Assunto principal:
Envelhecimento
/
Anticarcinógenos
/
Beta Caroteno
/
Linfoma
/
Antioxidantes
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article