Antifungal and antioxidant activity of fatty acid methyl esters from vegetable oils.

Submitted by Nuzia Santos ([email protected]) on 2018-03-22T15:22:36Z No. of bitstreams: 1 Antifungal and antioxidant activity of fatty acid methyl esters from vegetable oils.pdf: 632690 bytes, checksum: 042a1b2676ed88146463bd92d80209e8 (MD5)Approved for entry into archive by Nuzia Santos ([email protected]) on 2018-03-22T15:56:44Z (GMT) No. of bitstreams: 1 Antifungal and antioxidant activity of fatty acid methyl esters from vegetable oils.pdf: 632690 bytes, checksum: 042a1b2676ed88146463bd92d80209e8 (MD5)Made available in DSpace on 2018-03-22T15:56:44Z (GMT). No. of bitstreams: 1 Antifungal and antioxidant activity of fatty acid methyl esters from vegetable oils.pdf: 632690 bytes, checksum: 042a1b2676ed88146463bd92d80209e8 (MD5) Previous issue date: 2017Universidade Federal de São João Del Rei. Divinópolis, MG, BrazilUniversidade Federal de São João Del Rei. Divinópolis, MG, BrazilUniversidade Federal de São João Del Rei. Divinópolis, MG, BrazilUniversidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, BrazilUniversidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, BrazilUniversidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, BrazilFundação Oswaldo Cruz. Instituto Rene Rachou. René Rachou. Belo Horizonte, MG, BrazilUniversidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, BrazilUniversidade Federal de São João Del Rei. Divinópolis, MG, BrazilFatty acid methyl esters (FAMEs) were obtained from vegetable oils of soybean, corn and sunflower. The current study was focused on evaluating the antifungal activity of FAMEs mainly against Paracoccidioides spp., as well as testing the interaction of these compounds with commercial antifungal drugs and also their antioxidant potential. FAMEs presented small IC50 values (1.86-9.42 μg/mL). All three FAMEs tested showed antifungal activity against isolates of Paracoccidioides spp. with MIC values ranging from 15.6-500 µg/mL. Sunflower FAMEs exhibited antifungal activity that extended also to other genera, with an MIC of 15.6 μg/mL against Candida glabrata and C. krusei and 31.2 μg/mL against C. parapsilosis. FAMEs exhibited a synergetic effect with itraconazole. The antifungal activity of the FAMEs against isolates of Paracoccidioides spp. is likely due to the presence of methyl linoleate, the major compound present in all three FAMEs. The results obtained indicate the potential of FAMEs as sources for antifungal and antioxidant activity

In vitro cytotoxic, antifungal, trypanocidal and leishmanicidal activities of acetogenins isolated from Annona cornifolia A. St. -Hil. (Annonaceae)

Annona cornifolia A. St. -Hil. is a small annual perennial tree found in the Brazilian savannah; their green fruit is popularly used in the treatment of ulcers. The acetogenins isolated from the seeds of Annona cornifolia previously showed to possess antioxidant activity. In continuation of our investigations on the biological activities of acetogenins, four binary mixtures and ten pure adjacent bis-tetrahydrofuran annonaceous acetogenins were evaluated: the cytotoxic (against three human tumor cell lines), antifungal (against Paracoccidioides brasiliensis), trypanocidal (against Trypanosoma cruzi) and leishmanicidal (against Leishmania amazonensis) activities. Acetogenins presented cytotoxic activity confirming their potential use in anti-cancer therapy. Regarding leishmanicidal and trypanocidal activities, an inhibition of 87% of L. amazonensis amastigotes and 100% of T. cruzi amastigotes and trypomastigotes was observed, when tested at the concentration of 20 µg mL–1. Moreover, six acetogenins showed more activity against all the three tested isolates of P. brasiliensis than trimethoprim-sulfamethoxazole, a drug used for treating paracoccidioidomycosis. Thus, acetogenins may be an alternative in treating a number of diseases that have a huge impact on millions of people worldwide. This paper reports for the first time the antifungal, leishmanicidal and trypanocidal activities for these acetogenins

Antibacterial activity of Lamiaceae plant extracts in clinical isolates of multidrug-resistant bacteria

ABSTRACT The antibacterial activity of plant extracts of the Lamiaceae family was evaluated against clinical isolates of multi-resistant Gram-negative bacteria by broth microdilution technique. Promising results were obtained considering that all extracts were active for at least two bacterial species with MIC ranging from 0.5 to 2.0 mg/mL