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Title: Repeated doses of methylone, a new drug of abuse, induce changes in serotonin and dopamine systems in the mouse
Author: López-Arnau, Raúl
Martínez-Clemente, José
Abad, Sonia
Pubill Sánchez, David
Camarasa García, Jordi
Escubedo Rafa, Elena
Keywords: Drogues
Efectes fisiològics
Escorça cerebral
Lòbul frontal
Hipocamp (Cervell)
Drugs of abuse
Physiological effect
Cerebral cortex
Frontal lobe
Hippocampus (Brain)
Issue Date: 5-Apr-2014
Publisher: Springer Verlag
Abstract: Rationale Methylone, a new drug of abuse sold as"bath salts' has similar effects to ecstasy or cocaine. Objective We have investigated changes in dopaminergic and serotoninergic markers, indicative of neuronal damage, induced by methylone in the frontal cortex, hippocampus and striatum of mice and according two different treatment schedules. Methods Methylone was given subcutaneously to male Swiss CD1 mice and at an ambient temperature of 26ºC. Treatment A: three doses of 25 mg/Kg at 3.5 h interval between doses for two consecutive days. Treatment B: four doses of 25 mg/Kg at 3 h interval in one day. Results Repeated methylone administration induced hyperthermia and a significant loss in body weight. Following treatment A, methylone induced transient dopaminergic (frontal cortex) and serotoninergic (hippocampus) impairment. Following treatment B, transient dopaminergic (frontal cortex) and serotonergic (frontal cortex and hippocampus) changes 7 days after treatment were found. We found evidence of astrogliosis in the CA1 and the dentate gyrus of the hippocampus following treatment B. The animals also showed an increase in immobility time in the forced swim test, pointing to a depressive-like behavior. In cultured cortical neurons, methylone (for 24 and 48 h) did not induce a remarkable cytotoxic effect. Conclusions The neural effects of methylone differ depending upon the treatment schedule. Neurochemical changes elicited by methylone are apparent when administered at an elevated ambient temperature, four times per day at 3 h intervals, which is in accordance with its short half-life.
Note: Versió postprint del document publicat a:
It is part of: Psychopharmacology, 2014, vol. 231, num. 16, p. 3119-3129
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ISSN: 0033-3158
Appears in Collections:Articles publicats en revistes (Farmacologia, Toxicologia i Química Terapèutica)

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