Argentilactone Molecular Targets in Paracoccidioides brasiliensis Identified by Chemoproteomics.

Authors:
Lilian Cristiane Baeza
Lilian Cristiane Baeza
State University of Maringá
Brazil
Lucilia Kato
Lucilia Kato
Federal University of Goiás
Brazil
Clayton Luiz Borges
Clayton Luiz Borges
Laboratório de Biologia Molecular
Maristela Pereira
Maristela Pereira
Laboratório de Biologia Molecular
Brazil

Antimicrob Agents Chemother 2018 Nov 24;62(11). Epub 2018 Oct 24.

Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil

Paracoccidioidomycosis (PCM) is the cause of many deaths from systemic mycoses. The etiological agents of PCM belong to the genus, which is restricted to Latin America. The infection is acquired through the inhalation of conidia that primarily lodge in the lungs and may disseminate to other organs and tissues. The treatment for PCM is commonly performed via the administration of antifungals such as amphotericin B, co-trimoxazole, and itraconazole. The antifungal toxicity and side effects, in addition to their long treatment times, have stimulated research for new bioactive compounds. Argentilactone is a compound that was isolated from the Brazilian savanna plant , and it has been suggested to be a potent antifungal, inhibiting the dimorphism of and the enzymatic activity of isocitrate lyase, a key enzyme of the glyoxylate cycle. This work was developed due to the importance of elucidating the putative mode of action of argentilactone. The chemoproteomics approach via affinity chromatography was the methodology used to explore the interactions between proteins and argentilactone. A total of 109 proteins were identified and classified functionally. The most representative functional categories were related to amino acid metabolism, energy, and detoxification. Argentilactone inhibited the enzymatic activity of malate dehydrogenase, citrate synthase, and pyruvate dehydrogenase. Furthermore, argentilactone induces the production of reactive oxygen species and inhibits the biosynthesis of cell wall polymers.

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Source
http://dx.doi.org/10.1128/AAC.00737-18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6201122PMC
November 2018
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