Oleamide modulates memory in rats.
Oleamide is a recently described lipid, obtained from the cerebrospinal fluid of sleep-deprived cats. It has been observed that oleamide possesses several biological effects, such as sleep induction, and immunological suppression as well as serotonin and gamma-aminobutyric acid receptors activation. In addition, oleamide also binds to the cannabinoid receptors. In this study, we have observed that oleamide facilitates memory extinction in a passive avoidance paradigm, reduces core temperature and pain perception, but does not affect significantly locomotion. These results suggest that oleamide modulates memory processes. However, we do not know if oleamide impairs the retrieval of the memory associated to the "not go" behavior, or facilitates the fast re-learning of the "go" behavior. In addition, since these effects are also induced by marijuana and anandamide, it is very likely that oleamide may be affecting the cerebral cannabinoid system to induce its effects.
Murillo-Rodríguez
E
E
Grupo de Neurociencias, Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, A Postal 70-250 Mexico, D. F. 04510, Mexico.
Giordano
M
M
Cabeza
R
R
Henriksen
S J
SJ
Méndez Díaz
M
M
Navarro
L
L
Prospéro-García
O
O
D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects; D001831:Body Temperature / Q000187:drug effects; D002186:Cannabinoids / Q000378:metabolism; D004597:Electroshock; D006993:Hypnotics and Sedatives / Q000494:pharmacology*; D008297:Male; D008568:Memory / Q000187:drug effects*; D009829:Oleic Acids / Q000494:pharmacology*; D017288:Pain Threshold / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
D002186:Cannabinoids; D006993:Hypnotics and Sedatives; D009829:Oleic Acids; D012701:Serotonin; D005680:gamma-Aminobutyric Acid; C029407:oleylamide