Document Type
Article (Restricted)
Publication Date
1-1-2009
Abstract
A 96-well filtration-based 5-HT1A receptor-radioligand binding assay was optimized and adapted to carry out a bioassay-guided fractionation of the methanol extract of the bark of Popowia odoardi Diels(Annonaceae). This purification led to the isolation of two compounds identified as O-methyldauricine (1)and popisidine (2), which bind competitively to 5-HT 1A receptors at high concentrations with K ivalues of 4.5 and 5.8 μM, with [ 3 H]8-OH-DPAT as the radioligand. These results suggest that both of these bisbenzyltetrahydroisoquinoline alkaloids influence the activity of 5-HT 1A receptors through competitive binding as agonists or antagonists and may possess anxiolytic and anti-depressive effects.
Keywords
Alkaloid, Annonaceae, 5-hydroxytryptamine Receptor, O-methyldauricine, Popowia Odoardi, Popisidine
Divisions
fac_med
Publication Title
Pharmaceutical Biology
Volume
47
Issue
12
Publisher
Taylor & Francis
Additional Information
Address for Correspondence: L. Y. Chung, Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia. Tel.: +603 79674971; Fax: +603 79674964; E-mail: chungly@um.edu.my