Biological Activities of the Essential Oil from Erigeron floribundus
Riccardo Petrelli,
Giuseppe Orsomando,
Leonardo Sorci,
Filippo Maggi,
Farahnaz Ranjbarian,
Prosper C. Biapa Nya,
Dezemona Petrelli,
Luca A. Vitali,
Giulio Lupidi,
Luana Quassinti,
Massimo Bramucci,
Anders Hofer,
Loredana Cappellacci
Affiliations
Riccardo Petrelli
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Giuseppe Orsomando
Department of Clinical Sciences, Section of Biochemistry, Polytechnic University of Marche, Ancona 60131, Italy
Leonardo Sorci
Department of Clinical Sciences, Section of Biochemistry, Polytechnic University of Marche, Ancona 60131, Italy
Filippo Maggi
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Farahnaz Ranjbarian
Department of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
Prosper C. Biapa Nya
Laboratory of Medicinal Plant Biochemistry, Food Science and Nutrition, Department of Biochemistry, Faculty of Sciences, University of Dschang, PO Box 67, Dschang, Cameroon
Dezemona Petrelli
School of Biosciences and Veterinary Medicine, University of Camerino, Camerino 62032, Italy
Luca A. Vitali
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Giulio Lupidi
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Luana Quassinti
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Massimo Bramucci
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Anders Hofer
Department of Medical Biochemistry and Biophysics, Umeå University, Umeå 90187, Sweden
Loredana Cappellacci
School of Pharmacy, University of Camerino, Camerino 62032, Italy
Erigeron floribundus (Asteraceae) is an herbaceous plant widely used in Cameroonian traditional medicine to treat various diseases of microbial and non-microbial origin. In the present study, we evaluated the in vitro biological activities displayed by the essential oil obtained from the aerial parts of E. floribundus, namely the antioxidant, antimicrobial and antiproliferative activities. Moreover, we investigated the inhibitory effects of E. floribundus essential oil on nicotinate mononucleotide adenylyltransferase (NadD), a promising new target for developing novel antibiotics, and Trypanosoma brucei, the protozoan parasite responsible for Human African trypanosomiasis. The essential oil composition was dominated by spathulenol (12.2%), caryophyllene oxide (12.4%) and limonene (8.8%). The E. floribundus oil showed a good activity against Staphylococcus aureus (inhibition zone diameter, IZD of 14 mm, minimum inhibitory concentration, MIC of 512 µg/mL). Interestingly, it inhibited the NadD enzyme from S. aureus (IC50 of 98 µg/mL), with no effects on mammalian orthologue enzymes. In addition, T. brucei proliferation was inhibited with IC50 values of 33.5 µg/mL with the essential oil and 5.6 µg/mL with the active component limonene. The essential oil exhibited strong cytotoxicity on HCT 116 colon carcinoma cells with an IC50 value of 14.89 µg/mL, and remarkable ferric reducing antioxidant power (tocopherol-equivalent antioxidant capacity, TEAC = 411.9 μmol·TE/g).
