search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


African Journal of Traditional, Complementary and Alternative Medicines
African Ethnomedicines Network
ISSN: 0189-6016
Vol. 2, No. 3, 2005, pp. 222-232
Bioline Code: tc05023
Full paper language: English
Document type: Research Article
Document available free of charge

African Journal of Traditional, Complementary and Alternative Medicines, Vol. 2, No. 3, 2005, pp. 222-232

 en ACUTE TOXICITTY AND SLEEP-WAKE EEG ANALYSIS OF STACHTARPHETA CAYENNENSIS check for this species in other resources (VERBENACEAE) IN RODENTS
M. A. Akanmu, G. Olayiwola, O. E. Ukponmwan, K. Honda

Abstract

This study was carried out in order to establish the scientific basis of the reported ethno-medicinal use of Stachytarpheta cayennensis check for this species in other resources (Verbanaceae) as sedative drug. The acute toxicity and barbituric-hypnotic test of the total aqueous (TASC), 50% ethanol (SCCR) and butanol (SCBT), ethylacetate (SCEA) fractions of dried leaves of S. cayennensis were studied in male rats and mice. The effect of systemic administration of TASC on sleep architecture in rats was also evaluated in Sprague-Dawley rats that were chronically implanted with electrodes for electroencephalogram (EEG) and electromyogram (EMG) recording. The acute toxicity test revealed no lethal effect with doses of SCCR (up to 2000 mg/kg) per oral in rats and doses of TASC (up to 1000 mg/kg and 95 mg/kg) systemically in rats and mice respectively. The extracts significantly (p<0.01) potentiated phenobarbital-induced hypnosis by reducing sleep latency and increasing sleeping time in a dose-dependent manner. Systemic nocturnal administration of single doses (250 and 500 mg/kg) 30 minutes before the onset of dark period of TASC significantly (p<0.05) increased total sleep time, time spent in non-rapid eye movement (NREM) sleep during the 6-h recording period while its effect on REM sleep was biphasic with the higher dose administered. The aqueous extract of Stachytarpheta cayennensis showed profound effects on sleep-wake stages suggesting the potential sedative effects.

Keywords
Stachytarpheta cayennensis; acute toxicity; barbituric-hypnotic test; Wake; NREM sleep; REM sleep

 
© Copyright 2005 - African Journal Traditional, Complementary and Alternative Medicines
Alternative site location: http://journals.sfu.ca/africanem/index.php/ajtcam

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2017, Site last up-dated on 16-Oct-2017.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil