Blocking and suppressing mechanisms of chemoprevention by dietary constituents.
Toxicol Lett
; 112-113: 499-505, 2000 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-10720772
ABSTRACT
Many dietary constituents are chemopreventive in animal models, and experiments with cultured cells are revealing various potential mechanisms of action. Compounds classified as blocking agents can prevent, or greatly reduce, initiation of carcinogenesis, while suppressing agents affect later stages of the process by reducing cell proliferation. Many compounds have both types of activity. Blocking mechanisms include alteration of drug metabolising activities and scavenging of reactive oxygen species. Mechanisms which suppress tumorigenesis often involve modulation of signal transduction pathways, leading to altered gene expression, cell cycle arrest or apoptosis. As our knowledge of how these dietary components affect cell biochemistry improves, so the likelihood of success in chemoprevention trials and in provision of dietary advice to the general population to optimise the chances of preventing disease is increased.
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Base de dados:
MEDLINE
Assunto principal:
Dieta
/
Neoplasias
Limite:
Humans
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article