Abstract
The bioassay-guided fractionation of the ethyl acetate extract of the fungus Cochliobolus sp. highlighted leishmanicidal activity and allowed for anhydrocochlioquinone A (ANDC-A) isolation. MS, 1D and 2D NMR spectra of this compound were in agreement with those published in the literature. ANDC-A exhibited leishmanicidal activity with EC50 value of 22.4 µg/mL (44 μM) and, when submitted to the microdilution assay against Gram-positive and Gram-negative bacteria, showed a minimal inhibitory concentration against Staphylococcus aureus ATCC 25295 of 128 μg/mL (248.7 μM). It was also active against five human cancer cell lines, showing IC50 values from 5.4 to 20.3 μM. ANDC-A demonstrated a differential selectivity for HL-60 (SI 5.5) and THP-1 (SI 4.3) cell lines in comparison with Vero cells and was more selective than cisplatin and doxorubicin against MCF-7 cell line in comparison with human peripheral blood mononuclear cells. ANDC-A was able to eradicate clonogenic tumour cells at concentrations of 20 and 50 μM and induced apoptosis in all tumour cell lines at 20 μM. These results suggest that ANDC-A might be used as a biochemical tool in the study of tumour cells biochemistry as well as an anticancer agent with durable effects on tumours.
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The authors acknowledge Caryne Margotto Bertollo and Daniela Nabak Bueno for technical assistance. This work was supported by the Fundação Oswaldo Cruz (RPT10A), Fundação de Amparo à Pesquisa do Estado de Minas Gerais (CBB - APQ-00145-12-296841) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (472175/2012-2).
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Campos, F.F., Ramos, J.P., De Oliveira, D.M. et al. In vitro leishmanicidal, antibacterial and antitumour potential of anhydrocochlioquinone A obtained from the fungus Cochliobolus sp.. J Biosci 42, 657–664 (2017). https://doi.org/10.1007/s12038-017-9718-1
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DOI: https://doi.org/10.1007/s12038-017-9718-1