Estudo clínico Escitalopram versus Eletroterapia no Tratamento da Depressão (ELECT-TDCS)
racional e desenho de estudo de um ensaio de não inferioridade, de três braços, placebo-controlado
Palavras-chave:
Transtorno depressivo maior, Terapia por estimulação elétrica, Citalopram, Ensaio clínico controlado aleatório, Marcadores biológicosResumo
CONTEXTO E OBJETIVO: O transtorno depressivo maior (TDM) é uma condição psiquiátrica comum, tratada com me-dicamentos antidepressivos, os quais são limitados devido à refratariedade e efeitos adversos. Descrevemos o racional e o desenho do Estudo Clínico Escitalopram versus Eletroterapia no Tratamento da Depressão (ELECT-TDCS), que in-vestiga um tratamento não farmacológico, conhecido como estimulação transcraniana por corrente contínua (ETCC). DESENHO E LOCAL: Ensaio de fase III, randomizado, de não inferioridade, de três braços, placebo-controlado, em execução em São Paulo, Brasil. MÉTODOS: O estudo compara a eficácia da ETCC ativa/pílula placebo, ETCC simulada/escitalopram 20 mg/dia e ETCC simulada/pílula placebo durante 10 semanas, randomizando 240 pacientes em uma proporção 3:3:2, res-pectivamente. O objetivo principal é demostrar que a ETCC não é inferior ao escitalopram com uma margem de não inferioridade de pelo menos 50% do efeito de escitalopram em relação ao placebo. Como objetivos secun-dários, investigamos biomarcadores como polimorfismos genéticos, marcadores séricos, excitabilidade cortical motora, variabilidade da frequência cardíaca e neuroimagem. RESULTADOS: Provar que ETCC é igualmente eficaz a antidepressivos teria um tremendo impacto na psiquiatria clíni-ca, uma vez que a ETCC é praticamente isenta de efeitos adversos. Sua facilidade de uso, portabilidade e preço baixo são outras características atraentes para uso na atenção primária e secundária de saúde. A investigação multimodal de biomarcadores também contribuirá para a compreensão dos mecanismos de ação antidepressivos da ETCC. CONCLUSÃO: Os nossos resultados podem introduzir uma nova técnica no arsenal terapêutico do tratamento da depressão. REGISTRO DE ENSAIO CLÍNICO: ClinicalTrials.Gov NCT01894815.
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