Role of Serotonin and Noradrenaline in the Rapid Antidepressant Action of Ketamine

Depression is a chronic and debilitating illness that interferes severely with many human behaviors, and is the leading cause of disability in the world. There is data suggesting that deficits in serotonin neurotransmission can contribute to the development of depression. Indeed, >90% of prescribed antidepressant drugs act by increasing serotonergic transmission at the synapse. However, this increase is offset by a negative feedback operating at the level of the cell body of the serotonin neurons in the raphe nuclei. In the present work, we demonstrate: first, the intracortical infusion of ketamine induced an antidepressant-like effect in the forced swim test, comparable to that produced by systemic ketamine; second, systemic and intracortical ketamine increased serotonin and noradrenaline efflux in the prefrontal cortex, but not in the dorsal raphe nucleus; third, systemic and intracortical administration of ketamine increased the efflux of glutamate in the prefrontal cortex and dorsal raphe nucleus; fourth, systemic ketamine did not alter the functionality of 5-HT1A receptors in the dorsal raphe nucleus. Taken together, these findings suggest that the antidepressant-like effects of ketamine are caused by the stimulation of the prefrontal projection to the dorsal raphe nucleus and locus coeruleus caused by an elevated glutamate in the medial prefrontal cortex, which would stimulate release of serotonin and noradrenaline in the same area. The impact of both monoamines in the antidepressant response to ketamine seems to have different time frames.Funding: This work was supported by the Instituto de Salud Carlos III, Subdirección General del Evaluación y Fomento de la Investigación (FIS Grants PI13-00038 and PI16-00217) that were cofunded by the European Regional Development Fund (“A way to build Europe”). Funding from the Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) is also acknowledged. We also acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI)

Historia-historias de la lectura : XXIV Jornadas de Estudios Históricos Locales - XVII Jornadas de Historia de la Educación de los Países de Lengua Catalan

En el título, los términos 'Història' e 'Històries' están separados por una barra inclinadaLa temática de las jornadas se centra en el análisis de la dimensión educativa de la lectura a lo largo de la historia, y se desarrolla alrededor de los siguientes ejes temáticos: enseñar y aprender a leer; espacios y contextos para la lectura y su fomento; las lecturas educativas y la lectura y la educación como a elementos de debate y reflexión.La temàtica de les jornades se centra en l'anàlisi de la dimensió educativa de la lectura al llarg de la història, i es desenvolupa al voltant dels eixos temàtics següents: ensenyar i aprendre a llegir; espais i contextos per a la lectura i el seu foment; les lectures educatives i la lectura i l'educació com a elements de debat i reflexió.BalearesUniversitat de les Illes Balears. Redined Balears; Edifici Guillem Cifre de Colonya. Ctra. de Valldemossa, Km 7,5; 07122 Palma de Mallorca; +34971172792; +34971173190; [email protected]