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Rosewood oil induces sedation and inhibits compound action potential in rodents
Authors:Reinaldo Nóbrega de Almeida  Demétrius Antonio Machado Araújo  Juan Carlos Ramos Gonçalves  Fabrícia Costa Montenegro  Damião Pergentino de Sousa  José Roberto Leite  Rita Mattei  Marco Antonio Campana Benedito  José Gilberto Barbosa de Carvalho  Jader Santos Cruz  José Guilherme Soares Maia
Institution:1. Laboratório de Tecnologia Farmacêutica, Universidade Federal da Paraíba (LTF/UFPB), 58051-900 João Pessoa, PB, Brazil;2. Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), 04023-000 São Paulo, SP, Brazil;3. Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31901-970 Belo Horizonte, MG, Brazil;4. Faculdade de Engenharia Química, Universidade Federal do Pará (FEQ/UFPA), 66075-900 Belém, PA, Brazil
Abstract:

Aim of the study

Aniba rosaeodora is an aromatic plant which has been used in Brazil folk medicine due to its sedative effect. Therefore, the purpose of the present study was to evaluate the sedative effect of linalool-rich rosewood oil in mice. In addition we sought to investigate the linalool-rich oil effects on the isolated nerve using the single sucrose-gap technique.

Materials and methods

Sedative effect was determined by measuring the potentiation of the pentobarbital-induced sleeping time. The compound action potential amplitude was evaluated as a way to detect changes in excitability of the isolated nerve.

Results

The results showed that administration of rosewood oil at the doses of 200 and 300 mg/kg significantly decreased latency and increased the duration of sleeping time. On the other hand, the dose of 100 mg/kg potentiated significantly the pentobarbital action decreasing pentobarbital latency time and increasing pentobarbital sleeping time. In addition, the effect of linalool-rich rosewood oil on the isolated nerve of the rat was also investigated through the single sucrose-gap technique. The amplitude of the action potential decreased almost 100% when it was incubated for 30 min at 100 μg/ml.

Conclusions

From this study, it is suggested a sedative effect of linalool-rich rosewood oil that could, at least in part, be explained by the reduction in action potential amplitude that provokes a decrease in neuronal excitability.
Keywords:Essential oil  Rosewood oil  Hypnotic action  Aniba rosaeodora  Compound action potential
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