Effect of dietary Polyphenon E and EGCG on lung tumorigenesis in A/J Mice.
Pharm Res
; 27(6): 1066-71, 2010 Jun.
Article
em En
| MEDLINE
| ID: mdl-20112129
ABSTRACT
PURPOSE:
To compare the chemopreventive efficacy of Polyphenon E (Poly E), (-)-epigallocatechin-3-gallate (EGCG) and Polyphenon E without EGCG (Poly E-EGCG) on the development of benzo(a)pyrene (B(a)P)-induced lung tumors in A/J mice.METHODS:
Female A/J mice were given a single intraperitoneal injection of B(a)P (100 mg/kg body weight). One week after B(a)P injection, animals received AIN-76A purified powder diet containing 0.975% (wt/wt) EGCG, 0.525% (wt/wt) Poly E-EGCG or 1.5% (wt/wt) Poly E for 24 weeks or control diet with no additives.RESULTS:
Poly E treatment significantly decreased tumor multiplicity by 52% and tumor load by 64%, while EGCG and Poly E-EGCG did not significantly inhibit lung tumor multiplicity. EGCG was more stable in a complex mixture (Poly E) than as a pure compound.CONCLUSION:
EGCG was ineffective when administered by diet likely due to its instability. Thus, EGCG's efficacy on mice lung tumorigenesis requires the presence of other tea catechins.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Catequina
/
Anticarcinógenos
/
Pulmão
/
Neoplasias Pulmonares
Limite:
Animals
Idioma:
En
Revista:
Pharm Res
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Estados Unidos