In vitro and in vivo antimalarial activity of puberulic acid and its new analogs, viticolins A–C, produced by Penicillium sp. FKI-4410
- 10 November 2010
- journal article
- Published by Springer Science and Business Media LLC in The Journal of Antibiotics
- Vol. 64 (2), 183-188
- https://doi.org/10.1038/ja.2010.124
Abstract
In the course of screening for antimalarial agents, five tropolone compounds were isolated from the culture broth of Penicillium sp. FKI-4410. Two were known compounds, puberulic acid and stipitatic acid. Three were new analogs of puberulic acid, designated viticolins A–C. Among them, puberulic acid exhibited potent antimalarial inhibition, with IC50 values of 0.01 μg ml−1 against chloroquine-sensitive and -resistant Plasmodium falciparum strains in vitro. Furthermore, puberulic acid showed weak cytotoxicity against human MRC-5 cells, with an IC50 value of 57.2 μg ml−1. The compound also demonstrated a therapeutic effect in vivo, which compared well against the currently used antimalarial drugs, and thus shows promise as a leading candidate for development into a new antimalarial compound.Keywords
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