Abstract
Penicillium janthinellum, isolated as an endophytic fungus from fruits of Melia azedarach, was cultivated over 20 days on ground and autoclaved white corn, where the known polyketides citrinin, emodin, 1,6,8-trihydroxy-3-hydroxymethylanthraquinone, and a new modified anthraquinone, named janthinone, were produced and isolated by classical chromatographic procedures and identified by MS and 1D and 2D NMR spectroscopic data. The antibacterial properties of these polyketides were investigated. Citrinin inhibited 100% of Leishmania growth after 48h at a concentration of 40 mg mL-1.
Highlights
Endophytic microorganisms are isolated from internal plant tissue and can be present even at the cell level.[1,2] The biochemistry of these associations is a fascinating and novel field of research
Species of Penicillium isolated from this host plant have shown the ability to produce chemically interesting and biologically active compounds.[5,6,7]
The compounds 1-2 (Figure 1) were obtained from methanol extracts of the biomass produced by P. janthinellum on white-corn
Summary
Andrey M. do Rosário Marinhoa, Edson Rodrigues-Filho.*,a, Maria da Luz R. Penicillium janthinellum, isolado como um fungo endofítico dos frutos de Melia azedarach, foi cultivado por 20 dias em milho branco triturado e autoclavado, onde os policetídeos conhecidos citrinina, emodina, 1,6,8-triidróxi-3-hidroximetilantraquinona, e uma nova antraquinona modificada, denominada janthinona, foram produzidos e isolados por procedimentos cromatográficos clássicos e identificados por extensivos estudos espectroscópicos, principalmente RMN 1D e 2D e EM. Citrinina foi ensaiada pela primeira vez contra Leishmania e inibiu 100% o crescimento de cepas depois de 48h a uma concentração de 40 μg mL-1. Penicillium janthinellum, isolated as an endophytic fungus from fruits of Melia azedarach, was cultivated over 20 days on ground and autoclaved white corn, where the known polyketides citrinin, emodin, 1,6,8-trihydroxy-3-hydroxymethylanthraquinone, and a new modified anthraquinone, named janthinone, were produced and isolated by classical chromatographic procedures and identified by MS and 1D and 2D NMR spectroscopic data. Citrinin inhibited 100% of Leishmania growth after 48h at a concentration of 40 μg mL-1
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