ABSTRACT
El GHB, una droga popularmente conocida como «éxtasis líquido», es una sustancia con potencial de abuso. Entre los posibles efectos secundarios descritos tras su consumo continuado se han referido amnesia y deterioro de la memoria. Además, estudios recientes indican la existencia de neurotoxicidad en determinadas regiones cerebrales tras su tratamiento prolongado. El objetivo de este trabajo fue evaluar el efecto de la administración subcrónica de GHB ((10 y 100 mg/kg) sobre la memoria de trabajo espacial y los reflejos sensoriales y motores en ratas machos, utilizando el laberinto de agua de Morris y una batería de tests sensoriomotores, respectivamente. Los resultados indicaron que los animales tratados con 10 mg/kg de GHB presentaban una mayor latencia de escape durante la fase de adquisición en los días primeros y terceros de pruebas, respecto al grupo control (p<0.05), así como un deterioro del reflejo de «grasping» con las dos dosis de GHB empleadas (p<0.01). Numerosos estudios indican que la corteza prefrontal medial funciona como un sustrato neuronal crucial en la memoria de trabajo y en el reflejo de «grasping». Estos resultados sugieren que la administración prolongada de GHB podría alterar la estructura y/o función de la corteza prefrontal medial, así como sus interconexiones con otras estructuras relevantes en los procesos cognitivos y neurológicos evaluados
GHB, a popularly known drug as «liquid ecstasy», is a substance with abuse potential. Among the possible described side-effects after the continued consumption of GHB are amnesia and deterioration of memory. Likewise, recent studies indicate the existence of neurotoxicity in certain brain regions after its prolonged treatment. The aim of this study was to examine the effect of the subchronic administration of GHB (10 and 100 mg/kg) on spatial memory and sensoriomotor reflexes in male rats, using the Morris water maze and a battery of sensoriomotor tests, respectively. The results indicated that animals treated with GHB (10 mg/kg) showed a greater latency of escape during the phase of acquisition in the days first and third of tests, as compared with the control group (p<0.05), as well as a deterioration of grasping reflex with the two doses of GHB (p<0.01). Numerous studies indicated that the medial prefrontal cortex is a crucial neuronal substrate in the working memory and grasping reflex modulation. These results suggest that prolonged administration of GHB could alter structure and/or function of the medial prefrontal cortex, as well as its interconnections with other brain regions involved in the evaluated cognitive and neurological processes
Subject(s)
Animals , Rats , Designer Drugs/pharmacokinetics , Memory , 3-Hydroxybutyric Acid/pharmacokinetics , Amnesia/chemically induced , Memory Disorders/chemically induced , Neurotoxicity Syndromes , Rats, WistarABSTRACT
GHB, a popularly known drug as "liquid ecstasy", is a substance with abuse potential. Among the possible described side-effects after the continued consumption of GHB are amnesia and deterioration of memory. Likewise, recent studies indicate the existence of neurotoxicity in certain brain regions after its prolonged treatment. The aim of this study was to examine the effect of the subchronic administration of GHB (10 and 100 mg/kg) on spatial memory and sensoriomotor reflexes in male rats, using the Morris water maze and a battery of sensoriomotor tests, respectively. The results indicated that animals treated with GHB (10 mg/kg) showed a greater latency of escape during the phase of acquisition in the days first and third of tests, as compared with the control group (p<0.05), as well as a deterioration of grasping reflex with the two doses of GHB (p<0.01). Numerous studies indicated that the medial prefrontal cortex is a crucial neuronal substrate in the working memory and grasping reflex modulation. These results suggest that prolonged administration of GHB could alter structure and/or function of the medial prefrontal cortex, as well as its interconnections with other brain regions involved in the evaluated cognitive and neurological processes.
