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A comprehensive characterization of polyphenols by LC-ESI-QTOF-MS from geopropolis and their antibacterial, antioxidant and antiproliferative effects. | LitMetric
The geopropolis is a unique type of propolis produced by some stingless bee species. This product is known in folk medicine for its pharmacological properties, mainly antimicrobial and antioxidant, but there are few scientific studies that prove these properties. The objective of this study was to evaluate the phenolic composition and the antimicrobial, antioxidant and antiproliferative activities of geopropolis. The phenolic characterization of the geopropolis ethanolic extract was evaluated by LC-ESI-QTOF-MS. The antimicrobial activity was carried out against Gram-positive (including multiresistant microorganisms), negative and yeast. The synergistic effect was evaluated in association with Sulfamethoxazole + Trimethoprim. DPPH, ABTS, FRAP, ORAC and HPLC on-line were used to evaluate the antioxidant activity. Antiproliferative activity was assessed by the sulforhodamine B assay. Flavonoids and phenolic acids were identified in the extract, which showed promising antimicrobial activity, partially synergistic effect and antioxidant activity.
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