NDLI: Isolation and Structural Elucidation of Compounds from Pleiocarpa bicarpellata and Their In Vitro Antiprotozoal Activity

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Isolation and Structural Elucidation of Compounds from Pleiocarpa bicarpellata and Their In Vitro Antiprotozoal Activity

Content Provider	MDPI
Author	Luis, Quirós-Guerrero Pascal, Mäser Kilicaslan, Ozlem Sevik Cretton, Sylvian Bella, Merveilles A. Kaiser, Marcel Ndongo, Joseph T. Cuendet, Muriel
Copyright Year	2022
Description	Species of the genus Pleiocarpa are used in traditional medicine against fever and malaria. The present study focuses on the isolation and identification of bioactive compounds from P. bicarpellata extracts, and the evaluation of their antiprotozoal activity. Fractionation and isolation combined to LC-HRMS/MS-based dereplication provided 16 compounds: seven indole alkaloids, four indoline alkaloids, two secoiridoid glycosides, two iridoid glycosides, and one phenolic glucoside. One of the quaternary indole alkaloids (7) and one indoline alkaloid (15) have never been reported before. Their structures were elucidated by analysis of spectroscopic data, including 1D and 2D NMR experiments, UV, IR, and HRESIMS data. The absolute configurations were determined by comparison of the experimental and calculated ECD data. The extracts and isolated compounds were evaluated for their antiprotozoal activity towards Trypanosoma brucei rhodesiense, Trypanosoma cruzi, Leishmania donovani, and Plasmodium falciparum, as well as for their cytotoxicity against rat skeletal myoblast L6 cells. The dichloromethane/methanol (1:1) root extract showed strong activity against P. falciparum $(IC_{50}$ value of 3.5 µg/mL). Among the compounds isolated, tubotaiwine (13) displayed the most significant antiplasmodial activity with an $IC_{50}$ value of 8.5 µM and a selectivity index of 23.4. Therefore, P. bicarpallata extract can be considered as a source of indole alkaloids with antiplasmodial activity.
Starting Page	2200
e-ISSN	14203049
DOI	10.3390/molecules27072200
Journal	Molecules
Issue Number	7
Volume Number	27
Language	English
Publisher	MDPI
Publisher Date	2022-03-28
Access Restriction	Open
Subject Keyword	Molecules Integrative and Complementary Medicine Pleiocarpa Dereplication Alkaloids Antiprotozoal Activity Malaria
Content Type	Text
Resource Type	Article

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