Orexin A immunoreactivity and preproorexin mRNA in the brain of Zucker and WKY rats.
Neuroreport
; 12(3): 459-64, 2001 Mar 05.
Article
en En
| MEDLINE
| ID: mdl-11234746
ABSTRACT
The primary role of the orexins was originally believed to be appetite regulation, but is now believed to be the regulation of sleep, arousal and locomotor activity. Orexin A immunoreactivity (orexin A-IR) and prepro-orexin mRNA were measured in the CNS of obese and lean Zucker rats. There were no differences in orexin A-IR or prepro-orexin mRNA levels between obese and lean Zucker rats. The orexins are therefore unlikely to be important in this model of obesity. Levels of orexin A-IR and prepro-orexin mRNA were measured in the CNS of Wistar-Kyoto (WKY) rats, which are hypoactive and have abnormal sleep architecture. Compared to Wistar rats, WKY rats had significantly lower orexin A-IR (with differences of up to 100% in some brain regions) and prepro-orexin mRNA levels. These observations suggest that the sleep and activity phenotype of the WKY strain may be related to orexin deficiency and that this strain may be a useful model of partial orexin deficiency.
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Bases de datos:
MEDLINE
Asunto principal:
Precursores de Proteínas
/
Neuropéptidos
/
Química Encefálica
/
Proteínas Portadoras
/
Péptidos y Proteínas de Señalización Intracelular
Idioma:
En
Revista:
Neuroreport
Año:
2001
Tipo del documento:
Article
País de afiliación:
Reino Unido