title: Platelet-activating factor (PAF) receptor-binding antagonist activity of Malaysian medicinal plants.
abstract: Forty-nine methanol extracts of 37 species of Malaysian medicinal plants were investigated for their inhibitory effects on platelet-activating factor (PAF) binding to rabbit platelets, using 3H-PAF as a ligand. Among them, the extracts of six Zingiberaceae species (Alpinia galanga Swartz., Boesenbergia pandurata Roxb., Curcuma ochorrhiza Val., C. aeruginosa Roxb., Zingiber officinale Rosc. and Z. zerumbet Koenig.), two Cinnamomum species (C. altissimum Kosterm. and C. pubescens Kochummen.), Goniothalamus malayanus Hook. f. Momordica charantia Linn. and Piper aduncum L. are potential sources of new PAF antagonists, as they showed significant inhibitory effects with IC50 values ranging from 1.2 to 18.4 microg ml(-1).
authors.affiliation: Department of Pharmacy, Faculty of Allied Health Sciences, University Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia. ibj@medic.ukm.my
authors.forename: I
authors.initials: I
authors.lastname: Jantan
authors.forename: I A A
authors.initials: IA
authors.lastname: Rafi
authors.forename: J
authors.initials: J
authors.lastname: Jalil
mesh_terms: D000818:Animals; D005638:Fruit; D020128:Inhibitory Concentration 50; D008296:Malaysia; D008519:Medicine, Traditional; D008517:Phytotherapy; D024301:Plant Bark; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D018547:Plant Stems; D010972:Platelet Activating Factor / Q000037:antagonists & inhibitors*; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D011485:Protein Binding; D011817:Rabbits; D043562:Receptors, G-Protein-Coupled / Q000378:metabolism; D027343:Rhizome; D012639:Seeds; D030521:Zingiberaceae
chemical_list: D010936:Plant Extracts; D010972:Platelet Activating Factor; D010975:Platelet Aggregation Inhibitors; D043562:Receptors, G-Protein-Coupled