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- Phenolic profile, cytotoxicity and in vitro antioxidant and enzyme inhibitory properties of the edible halophyte Sarcocornia fruticosa from southeastern TunisiaPublication . Harboub, Nesrine; Mighri, Hedi; Bennour, Naima; Guerreiro Pereira, Catarina Alexandra; Fernandes, Eliana; Castañeda-Loaiza, Viana; Custódio, Luísa; Abdellaoui, Raoudha; Akrout, AhmedThis work aims to boost the sustainable valorization of the edible halophyte Sarcocornia fruticosa (L.) A.J. Scott ( Amaranthaceae ) from Southern Tunisia by assessing its potential as a source of bioactive components. To achieve this, hydroethanolic extracts of S. fruticosa, , collected from two distinct Tunisian biomes (Zarzis: SFZ and Djerba: SFDJ), were profiled for total phenolic, flavonoid, and condensed tannin contents, as well as for individual phenolic composition by HPLC-ESI-MS. Then, the extracts were evaluated for in vitro antioxidant properties via complementary methods and for in vitro inhibition of enzymes related to Alzheimer's disease (acetylcholinesterase: AChE, and butyrylcholinesterase: BuChE), type 2 diabetes (alpha-glucosidase and alpha-amylase), and hyper- pigmentation and food oxidation (tyrosinase). Finally, they were assessed for acute in vitro toxicity. Our findings identified thirteen phenolic compounds, with rutin being the predominant compound and its content being nearly twice as high in SFZ than in SFDJ (1224.51 and 643.61 mg/kg DW, respectively). Salvianolic acid B was also reported for the first time in Sarcocornia genus. The extracts exhibited notable ferric reducing antioxidant power (FRAP), with SFZ displaying an effective median concentration (EC50) 50 ) value of 0.97 mg/mL. They also showed promising inhibitory effects on acetylcholinesterase (>40%) and tyrosinase (>50%), without any cytotoxicity. The Zarzis ecotype in particular displayed superior bioactive properties, making it an excellent candidate for future cultivation trials under saline conditions, with potentially valuable economic outcomes for the region. These findings highlight the potential of S. fruticosa as a source of functional ingredients with nutraceutical and therapeutic applications.
- Antioxidant activity, enzyme inhibition, photoprotection, cytotoxicity, and phytochemical profiling of sea lavender (Limonium algarvense Erben) seed extracts for dermo-cosmetic usePublication . Lescano, Leonardo; Cziáky, Zoltán; Kurt-Celep, İnci; Zengin, Gökhan; Fernandes, Eliana; Trentin, Riccardo; Guerreiro Pereira, Catarina Alexandra; Custódio, Luísa; Rodrigues, Maria JoãoDespite sea lavender being a medicinal species, research on its seeds' biological properties and chemical composition is unexplored. Thus, this study evaluated the effect of different extraction solvents on the biological activities and chemical profile of greenhouse-cultivated sea lavender seeds, aiming at their potential use as a dermo-cosmetic ingredient. Therefore, ethyl acetate, acetone, ethanol, and water extracts were examined for their antioxidant activity, enzyme inhibition, photoprotection, and cytotoxicity, followed by phytochemical analysis through spectrophotometric methods, further detailed by Ultrahigh-Performance Liquid Chromatography Coupled with Electrospray Ionization Mass/Mass Spectrometry (UHPLC-Esi-MS/MS).ResultsThe water extract demonstrated significant antioxidant activity, evidenced by low half maximal effective concentration (EC50) values in scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2 '-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals, reducing iron and chelating copper (296, 478, 230 and 678 mu g/mL, respectively). The ethanol extract was more effective in inhibiting cosmetic-related enzymes, particularly elastase and hyaluronidase (2.18 and 3.21 mu g/mL, respectively). The water and acetone extracts had the highest sun protection factors (23.2 and 18.9, respectively). All the extracts had nil to weak cytotoxicity (70-120% cell viability) towards mammalian cell lines. The water extract had the highest phenolics and condensed tannins (115 and 78.30 mg/g extract, respectively), while the ethanol contained the most flavonoids (62.73 mg/g extract). UHPLC-ESI-MS/MS analysis identified ethyl gallate, myricetin, rutin, and quercetin as major components of the ethanol extract, whereas myricetin-O-rutinoside isomers are predominant in the water extract.ConclusionsThese findings highlight the potential of greenhouse-cultivated sea lavender seeds as potential dermo-cosmetic ingredients, with ethanol and water extracts demonstrating superior biological activities and chemical profiles, significantly contributing to general skin health and protection.