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Suarez AFL, Tirador ADG, Villorente ZM, Bagarinao CF, Sollesta JVN, Dumancas GG, Sun Z, Zhan ZQ, Saludes JP, Dalisay DS. The Isorhamnetin-Containing Fraction of Philippine Honey Produced by the Stingless Bee Tetragonula biroi Is an Antibiotic against Multidrug-Resistant Staphylococcus aureus. Molecules 2021; 26:1688. [PMID: 33802916 PMCID: PMC8002709 DOI: 10.3390/molecules26061688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/26/2021] [Accepted: 03/05/2021] [Indexed: 12/27/2022] Open
Abstract
Honey exhibits antibacterial and antioxidant activities that are ascribed to its diverse secondary metabolites. In the Philippines, the antibacterial and antioxidant activities, as well as the bioactive metabolite contents of the honey, have not been thoroughly described. In this report, we investigated the in vitro antibacterial and antioxidant activities of honey from Apis mellifera and Tetragonula biroi, identified the compound responsible for the antibacterial activity, and compared the observed bioactivities and metabolite profiles to that of Manuka honey, which is recognized for its antibacterial and antioxidant properties. The secondary metabolite contents of honey were extracted using a nonionic polymeric resin followed by antibacterial and antioxidant assays, and then spectroscopic analyses of the phenolic and flavonoid contents. Results showed that honey extracts produced by T. biroi exhibits antibiotic activity against Staphylococcal pathogens as well as high antioxidant activity, which are correlated to its high flavonoid and phenolic content as compared to honey produced by A. mellifera. The bioassay-guided fractionation paired with Liquid Chromatography Mass Spectrometry (LCMS) and tandem MS analyses found the presence of the flavonoid isorhamnetin (3-methylquercetin) in T. biroi honey extract, which was demonstrated as one of the compounds with inhibitory activity against multidrug-resistant Staphylococcus aureus ATCC BAA-44. Our findings suggest that Philippine honey produced by T. biroi is a potential nutraceutical that possesses antibiotic and antioxidant activities.
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Affiliation(s)
- Angelica Faith L. Suarez
- Center for Chemical Biology and Biotechnology (C2B2), University of San Agustin, Iloilo City 5000, Philippines; (A.F.L.S.); (A.D.G.T.)
| | - April Dawn G. Tirador
- Center for Chemical Biology and Biotechnology (C2B2), University of San Agustin, Iloilo City 5000, Philippines; (A.F.L.S.); (A.D.G.T.)
| | - Zenith M. Villorente
- Maridan Industries, Inc., Jaro, Iloilo City 5000, Philippines; (Z.M.V.); (C.F.B.); (J.V.N.S.)
| | - Cathrina F. Bagarinao
- Maridan Industries, Inc., Jaro, Iloilo City 5000, Philippines; (Z.M.V.); (C.F.B.); (J.V.N.S.)
| | - Jan Vincent N. Sollesta
- Maridan Industries, Inc., Jaro, Iloilo City 5000, Philippines; (Z.M.V.); (C.F.B.); (J.V.N.S.)
| | - Gerard G. Dumancas
- Department of Mathematics and Physical Sciences, Louisiana State University at Alexandria, Alexandria, LA 71302, USA;
- Balik Scientist Program, Philippine Council for Health Research and Development (PCHRD), Department of Science and Technology, Bicutan, Taguig City 1631, Philippines;
| | - Zhe Sun
- Shimadzu Asia Pacific (SAP), Singapore Science Park I, Singapore 118264, Singapore; (Z.S.); (Z.Q.Z.)
| | - Zhao Qi Zhan
- Shimadzu Asia Pacific (SAP), Singapore Science Park I, Singapore 118264, Singapore; (Z.S.); (Z.Q.Z.)
| | - Jonel P. Saludes
- Balik Scientist Program, Philippine Council for Health Research and Development (PCHRD), Department of Science and Technology, Bicutan, Taguig City 1631, Philippines;
- Center for Natural Drug Discovery and Development (CND3), University of San Agustin, Iloilo City 5000, Philippines
- Department of Chemistry, College of Liberal Arts, Sciences, and Education, University of San Agustin, Iloilo City 5000, Philippines
| | - Doralyn S. Dalisay
- Center for Chemical Biology and Biotechnology (C2B2), University of San Agustin, Iloilo City 5000, Philippines; (A.F.L.S.); (A.D.G.T.)
- Balik Scientist Program, Philippine Council for Health Research and Development (PCHRD), Department of Science and Technology, Bicutan, Taguig City 1631, Philippines;
- Department of Biology, College of Liberal Arts, Sciences, and Education, University of San Agustin, Iloilo City 5000, Philippines
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