Bioguided isolation of antiplasmodial secondary metabolites from Persea americana Mill. (Lauraceae)

Author:

Waleguele Christine Claire12,Tchuente Tchuenmogne Marthe Aimée3,Fotsing Fongang Yannick Stéphane4,Ngatchou Jules1,Kezetas Bankeu Jean Jules5ORCID,Ngouela Augustin Silvère1,Tsamo Etienne1,Sewald Norbert6ORCID,Krause Rui Werner Maçedo2ORCID,Lenta Bruno Ndjakou7

Affiliation:

1. Department of Organic Chemistry , Faculty of Science, University of Yaoundé I , P.O. Box 812 , Yaoundé , Cameroon

2. Department of Chemistry , Rhodes University , P.O. Box 94 , Grahamstown/Makhanda 6140 , South Africa

3. Department of Chemistry , Faculty of Science, University of Dschang , P.O. Box 67 , Dschang , Cameroon

4. Department of Chemistry , Higher Teachers’ Training College, University of Maroua , P.O. Box 55 , Maroua , Cameroon

5. Department of Chemistry , Faculty of Science, The University of Bamenda , P.O. Box 39 , Bambili , Cameroon

6. Department of Chemistry , Bielefeld University , P.O. Box 100131, 33501 Bielefeld , Germany

7. Department of Chemistry , Higher Teacher Training College, University of Yaoundé I , P.O. Box 47 , Yaoundé , Cameroon

Abstract

Abstract The antiplasmodium assay-guided investigation of the roots, stem bark, and leaves of Persea americana Mill. led to the isolation of a new fatty alcohol, perseatriol (1), along with six known compounds (2–7). Their structures were elucidated based on the analysis of their NMR and MS data. All crude extracts and fractions exhibited good antiplasmodial activity on Plasmoduim falciparum 3D7 with IC50 values ranging from 0.76 to 10.5 μg/mL; they also displayed cytotoxicity against HeLa cells with low selectivity indexes (SIs). A preliminary Plasmodium lactate dehydrogenase (pLDH) assay was also performed on the isolated compounds. 9,9′-Di-O-feruloyl-5,5′-dimethoxysecoisolariciresinol (4) turned out to be non-toxic and displayed the best activities on P. falciparum with an IC50 value of 0.05 μM, comparable to the reference drug chloroquine with an IC50 value of 0.03 μM. Furthermore, besides compound 4, this work reports the first isolation of lutein (2) and scopoletin (3) from P. americana. The crude extracts of roots, stem bark, and leaves of P. americana, their fractions and compounds completely suppressed the growth of P. falciparum. The observed activity supports the use of P. americana in folk medicine for the treatment of malaria.

Publisher

Walter de Gruyter GmbH

Subject

General Biochemistry, Genetics and Molecular Biology

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