Circadian and photic regulation of ERK, JNK and p38 in the hamster SCN.
Circadian rhythms are entrained by light-activated signal transduction pathways in the biological clock. Among these, circadian and photic control of mouse suprachiasmatic ERK MAP kinase activation has been reported. In this paper we extend these results to hamsters and to the two other major members of the MAPK family: JNK and p38. The three kinases are rhythmically phosphorylated under light-dark and constant conditions, with maximal values during the day or subjective day. Light pulses during the subjective night induce rapid activation of the three enzymes, suggesting that the three MAP kinases might be implicated in mammalian photic entrainment.
Pizzio
Gastón A
GA
Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 180, Bernal (B1876BXD) Pcia. de Buenos Aires, Buenos Aires, Argentina.
Hainich
Ernesto C
EC
Ferreyra
Gabriela A
GA
Coso
Omar A
OA
Golombek
Diego A
DA
D000818:Animals; D015153:Blotting, Western; D002940:Circadian Rhythm / Q000502:physiology*; D006224:Cricetinae; D008027:Light; D008647:Mesocricetus; D020928:Mitogen-Activated Protein Kinases / Q000096:biosynthesis*; D010766:Phosphorylation; D010775:Photic Stimulation; D013493:Suprachiasmatic Nucleus / Q000502:physiology*; D048051:p38 Mitogen-Activated Protein Kinases
D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases