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| RICHTER,HANS G; TORRES-FARFÁN,CLAUDIA; ROJAS-GARCÍA,PEDRO P; CAMPINO,CARMEN; TORREALBA,FERNANDO; SERÓN-FERRÉ,MARÍA. |
| The circadian time-keeping system ensures predictive adaptation of individuals to the reproducible 24-h day/night alternations of our planet by generating the 24-h (circadian) rhythms found in hormone release and cardiovascular, biophysical and behavioral functions, and others. In mammals, the master clock resides in the suprachiasmatic nucleus (SCN) of the hypothalamus. The molecular events determining the functional oscillation of the SCN neurons with a period of 24-h involve recurrent expression of several clock proteins that interact in complex transcription/translation feedback loops. In mammals, a glutamatergic monosynaptic pathway originating from the retina regulates the clock gene expression pattern in the SCN neurons, synchronizing them to the... |
| Tipo: Journal article |
Palavras-chave: Biological rhythms; Circadian timing system; Clock genes; Melatonin. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000100003 |
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| Pedrazzoli,Mario; Secolin,Rodrigo; Esteves,Luiz Otávio Bastos; Pereira,Danyella Silva; Koike,Bruna Del Vechio; Louzada,Fernando Mazzili; Lopes-Cendes,Iscia; Tufik,Sergio. |
| Several studies have shown that mutations and polymorphisms in clock genes are associated with abnormal circadian parameters in humans and also with more subtle non-pathological phenotypes like chronotypes. However, there have been conflicting results, and none of these studies analyzed the combined effects of more than one clock gene. Up to date, association studies in humans have focused on the analysis of only one clock gene per study. Since these genes encode proteins that physically interact with each other, combinations of polymorphisms in different clock genes could have a synergistic or an inhibitory effect upon circadian phenotypes. In the present study, we analyzed the combined effects of four polymorphisms in four clock genes (Per2, Per3, Clock... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clock genes; Gene interaction; Morningness-eveningness; Sleep; Circadian rhythm. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400005 |
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