6533b858fe1ef96bd12b6349
RESEARCH PRODUCT
Polyphenol Characterization, Antioxidant and Skin Whitening Properties of Alnus cordata Stem Bark
Valeria D'angeloDomenico TrombettaFrancesco Maria RaimondoAntonella SmeriglioMarcella DenaroMaria Paola Germanòsubject
AntioxidantOxygen radical absorbance capacityDPPHmedicine.medical_treatmentTrolox equivalent antioxidant capacityBioengineeringAlnus cordata; antimelanogenic activity; Betulaceae; mushroom tyrosinase; polyphenols; RP-LC-DAD analysis; zebrafish; Alnus; Animals; Antioxidants; Biphenyl Compounds; Enzyme Inhibitors; Monophenol Monooxygenase; Picrates; Plant Bark; Plant Extracts; Polyphenols; Skin; ZebrafishAlnus01 natural sciencesBiochemistryAntioxidantschemistry.chemical_compoundPicratesmedicineAnimalsFood scienceEnzyme InhibitorsMolecular BiologyIC50ZebrafishSkinbiologyMonophenol MonooxygenasePlant Extracts010405 organic chemistryBiphenyl CompoundsPolyphenolsSkin whiteningGeneral ChemistryGeneral Medicinebiology.organism_classificationAlnus cordata0104 chemical sciences010404 medicinal & biomolecular chemistrychemistryPolyphenolPlant BarkMolecular Medicinedescription
In this study, we investigated the phenolic composition of the crude extract (MeOH 80 %) of Alnus cordata (Loisel.) Duby stem bark (ACE) and its antioxidant and skin whitening properties. RP-LC-DAD analysis showed a high content of hydroxycinnamic acids (47.64 %), flavanones (26.74 %) and diarylheptanoids (17.69 %). Furthermore, ACE exhibited a dose-dependent antioxidant and free-radical scavenging activity, expressed as half-maximal inhibitory concentration (IC50 ): Oxygen radical absorbance capacity (ORAC, IC50 1.78 μg mL-1 )>Trolox equivalent antioxidant capacity (TEAC, IC50 3.47 μg mL-1 )>2,2-Diphenyl-1-picrylhydrazyl (DPPH, IC50 5.83 μg mL-1 )>β-carotene bleaching (IC50 11.58 μg mL-1 )>Ferric reducing antioxidant power (FRAP, IC50 17.28 μg mL-1 ). Moreover, ACE was able to inhibit in vitro tyrosinase activity (IC50 77.44 μg mL-1 ), l-DOPA auto-oxidation (IC50 39.58 μg mL-1 ) and in an in vivo model it exhibited bleaching effects on the pigmentation of zebrafish embryos (72 h post fertilization) without affecting their development and survival. In conclusion, results show that A. cordata stem bark may be considered a potential source of agents for the treatment of skin disorders due to its bleaching properties and favorable safety profiles, associated to a good antioxidant power.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-08-28 |