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J Fungi (Basel). 2018 Jun 12;4(2). pii: E70. doi: 10.3390/jof4020070.

Antiplasmodial Properties and Cytotoxicity of Endophytic Fungi from Symphonia globulifera (Clusiaceae).

Author information

1
Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, 237 Yaoundé, Cameroon. atebaterence@yahoo.fr.
2
Department of Biochemistry, Faculty of Science, University of Yaoundé I, Cameroon; P.O. Box 812, 237 Yaoundé, Cameroon. toghueo.rufin@yahoo.fr.
3
Department of Chemistry, Faculty of Science, University of Bamenda, P.O. Box 39, 237 Bambili, Cameroon. aawantu@gmail.com.
4
Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, 237 Yaoundé, Cameroon. brice_mbaning@yahoo.fr.
5
Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, P.O. Box 100131, D-33501 Bielefeld, Germany. sebastian.gohlke@uni-bielefeld.de.
6
International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India. dsahal@gmail.com.
7
Departamento de Química-Universidade Federal de São Carlos-CP 676, São Carlos-SP 13565-905, Brazil. edinho@pq.cnpq.br.
8
Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, 237 Yaoundé, Cameroon. etsamo@yahoo.fr.
9
Department of Biochemistry, Faculty of Science, University of Yaoundé I, Cameroon; P.O. Box 812, 237 Yaoundé, Cameroon. fabrice.boyom@fulbrightmail.org.
10
Department of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, P.O. Box 100131, D-33501 Bielefeld, Germany. norbert.sewald@uni-bielefeld.de.
11
Department of Chemistry, Higher Teacher Training College, University of Yaoundé 1, P.O. Box 47, 237 Yaoundé, Cameroon. lentabruno@yahoo.fr.

Abstract

There is continuing need for new and improved drugs to tackle malaria, which remains a major public health problem, especially in tropical and subtropical regions of the world. Natural products represent credible sources of new antiplasmodial agents for antimalarial drug development. Endophytes that widely colonize healthy tissues of plants have been shown to synthesize a great variety of secondary metabolites that might possess antiplasmodial benefits. The present study was carried out to evaluate the antiplasmodial potential of extracts from endophytic fungi isolated from Symphonia globulifera against a chloroquine-resistant strain of Plasmodium falciparum (PfINDO). Sixty-one fungal isolates with infection frequency of 67.77% were obtained from the bark of S. globulifera. Twelve selected isolates were classified into six different genera including Fusarium, Paecilomyces, Penicillium, Aspergillus, Mucor, and Bipolaris. Extracts from the 12 isolates were tested against PfINDO, and nine showed good activity (IC50 < 10 &mu;g&middot;mL&minus;1) with three fungi including Paecilomyces lilacinus (IC50 = 0.44 &mu;g&middot;mL&minus;1), Penicillium janthinellum (IC50 = 0.2 &mu;g&middot;mL&minus;1), and Paecilomyces sp. (IC50 = 0.55 &mu;g&middot;mL&minus;1) showing the highest promise. These three isolates were found to be less cytotoxic against the HEK293T cell line with selectivity indices ranging from 24.52 to 70.56. Results from this study indicate that endophytic fungi from Symphonia globulifera are promising sources of hit compounds that might be further investigated as novel drugs against malaria. The chemical investigation of active extracts is ongoing.

KEYWORDS:

Symphonia globulifera; antiplasmodial IC50; chloroquine-resistant Plasmodium falciparum; endophytic fungi; malaria; selectivity index

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