Pérez de la Mora M, Aguilar-García A, Ramon-Frías T, Ramírez-Ramírez R, Méndez-Franco J, Rambert F, Fuxe K
Department of Biophysics, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City.
Neurosci Lett. 1999 Jan 15;259(3):181-5. doi: 10.1016/s0304-3940(98)00905-7.
The effects of the vigilance promoting drug modafil were studied ex vivo (100 mg/kg; i.p.) and in vitro (10-1000 microM modafinil) on the synthesis of [3H]gamma-aminobutyric acid ([3H]GABA) and [3H]glutamate from [3H]glutamine within the rat hypothalamus. No effects of modafinil were observed on the overall synthesis of these neurotransmitters nor, in vitro (1-33 microM modafinil) on other parameters related to the compartmentalization of their synthesis (glutamate decarboxylase and phosphate-activated glutaminase activities, and [3H]glutamine uptake). It is suggested on these grounds, that the modafinil-induced reductions and increases in regional GABA and glutamate extracellular levels respectively using in vivo microdialysis may be a consequence of an indirect effect of modafinil on these neurons.
