Circadian Clock Control by Polyamine Levels through a Mechanism that Declines with Age.
Cell Metab
; 22(5): 874-85, 2015 Nov 03.
Article
en En
| MEDLINE
| ID: mdl-26456331
ABSTRACT
Polyamines are essential polycations present in all living cells. Polyamine levels are maintained from the diet and de novo synthesis, and their decline with age is associated with various pathologies. Here we show that polyamine levels oscillate in a daily manner. Both clock- and feeding-dependent mechanisms regulate the daily accumulation of key enzymes in polyamine biosynthesis through rhythmic binding of BMAL1CLOCK to conserved DNA elements. In turn, polyamines control the circadian period in cultured cells and animals by regulating the interaction between the core clock repressors PER2 and CRY1. Importantly, we found that the decline in polyamine levels with age in mice is associated with a longer circadian period that can be reversed upon polyamine supplementation in the diet. Our findings suggest a crosstalk between circadian clocks and polyamine biosynthesis and open new possibilities for nutritional interventions against the decay in clock's function with age.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Poliaminas
/
Proteínas CLOCK
/
Factores de Transcripción ARNTL
/
Criptocromos
/
Proteínas Circadianas Period
Tipo de estudio:
Prognostic_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Cell Metab
Asunto de la revista:
METABOLISMO
Año:
2015
Tipo del documento:
Article
País de afiliación:
Israel