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Title: Antimalarial and cytotoxic activities of pregnene-type steroidal alkaloids from Holarrhena pubescens roots
Authors: Sarot Cheenpracha
Pannakorn Boapun
Thunwadee Limtharakul (née Ritthiwigrom)
Surat Laphookhieo
Stephen G. Pyne
Keywords: Agricultural and Biological Sciences
Biochemistry, Genetics and Molecular Biology
Issue Date: 25-Nov-2017
Abstract: © 2017 Informa UK Limited, trading as Taylor & Francis Group The phytochemical investigation of an alkaloidal extract of Holarrhena pubescens roots led to the isolation and identification of a new pregnene-type alkaloid, mokluangin D (1), together with nine known steroidal alkaloids (2–10). The structure of the new metabolite was determined on the basis of spectroscopic analyses including 1D- and 2D-NMR spectroscopy and mass spectrometry. Compounds 3 and 4 showed potent antimalarial activity against Plasmodium falciparum K1 stain with IC50values of 1.2 and 2.0 μM, respectively, and showed weak cytotoxic activity against the NCI-H187 cell line with IC50values of 27.7 and 30.6 μM, respectively. The substituent groups at C-3 and the carbonyl group at C-18 are important for the activity against the P. falciparum K1 stain.
ISSN: 14786427
Appears in Collections:CMUL: Journal Articles

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