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Neurosci Lett ; 715: 134606, 2020 01 10.
Artigo em Inglês | MEDLINE | ID: mdl-31693929

RESUMO

Methamphetamine (MA), a synthetic derivate of amphetamine, has become a major drug of abuse worldwide. This study investigated the effect of binge-like MA dosing (4 x 4 mg/kg, s.c., 2 h (h) apart) at a range of different time points (from 2 h to 7 days after treatment) on brain-derived neurotrophic factor (BDNF) levels and its receptors, TrkB and p75NTR. BDNF levels were significantly increased in the frontal cortex from 2 to 36 h after treatment, returning to normal within 48 h after treatment. In the striatum, BDNF expression was increased at 12 and 24 h after binge-like MA treatment and had returned to normal at 36 h. Increased expression of the TrkB receptor was observed in the frontal cortex at 2, 24 and 48 h after MA treatment and in the striatum at 24 and 48 h after the MA regimen. A significant increase in the p75NTR receptor was also noted in the striatum but not the frontal cortex, and it was less pronounced than the effect on TrkB receptor expression. These findings show that the binge-like regimen of MA affects expression of BDNF and its receptors, particularly the TrkB receptor, in a time and region dependent manner, and highlights the importance of the frontal cortex and the striatum in the response following MA binge-like dosing.


Assuntos
Comportamento Aditivo/metabolismo , Fator Neurotrófico Derivado do Encéfalo/biossíntese , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Metanfetamina/administração & dosagem , Receptor trkB/biossíntese , Animais , Estimulantes do Sistema Nervoso Central/administração & dosagem , Esquema de Medicação , Masculino , Ratos , Ratos Sprague-Dawley , Fatores de Tempo
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