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Phenolic profiling and in vitro bioactivity of Moringa oleifera leaves as affected by different extraction solvents
Scopus
Toplam 122 atıf DOI
In this work the (poly)-phenolic profile of Moringa oleifera leaves was comprehensively investigated through untargeted metabolomics, following a homogenizer-assisted extraction (HAE) using three solvent systems, i.e. methanol (HAE-1), methanol-water 50:50 v/v (HAE-2) and ethyl acetate (HAE-3). This approach allowed to putatively annotate 291 compounds, recording mainly flavonoids and phenolic acids. Thereafter, antioxidant capacity, antimicrobial activity and enzyme inhibition were assayed in the different extracts. HAE-1 extract showed the highest total phenolic content (31.84 mg/g), followed by HAE-2 (26.95 mg/g) and HAE-3 (14.71 mg/g). In addition, HAE-1 and HAE-2 extracts exhibited an expressive activity against Bacillus cereus and Listeria innocua. The HAE-2 leaf extract was characterized by the highest DPPH and ABTS values (being 49.55 and 45.26 mgTE/g), while ferric reducing antioxidant power was found to be higher in HAE-1 (58.26 mgTE/g). Finally, the enzyme inhibitory effects of M. oleifera leaf extracts were investigated against five enzymes, namely acetylcholinesterase (AChE), butyrylcholinesterase (BChE), tyrosinase, α-amylase and α-glucosidase. All of the tested extracts exhibited inhibitory effects on AChE and BChE with a higher activity for HAE-3 and HAE-1, whilst HAE-1 showed the higher impact on tyrosinase, glucosidase and amylase activities. Taken together, these findings suggest that M. oleifera leaf extracts are a good source of bioactive polyphenols with a potential use in food and pharma industries.
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A UHPLC-QTOF-MS screening provides new insights into the phytochemical composition and biological properties of six Consolida species from Turkey
Scopus
Havuzumuzda 5 atıf almış
The genus Consolida is one of the most important within the Ranunculaceae family and several members of this genus contain important biologically active compounds, such as phenolics and alkaloids. The present study attempts for the first time to assess the biological properties and phytochemical constituents of six Consolida species (C. glandulosa (Boiss. & A. Huet) Bornm, C. hellospontica (Boiss.) Chater, C. raveyi (Boiss.) Schrödinger, C. regalis (Boiss.) Schrödinger, C. staminosa P.H. Davis & Sorger and C. stenocarpa (P.H. Davis & M. Hossain) P.H. Davis) growing in Turkey. A comprehensive phytochemical profiling of the different species was achieved by using an ultra-high-performance liquid chromatography-quadrupole time-of-flight (UHPLC-QTOF) mass spectrometry, targeting polyphenols and diterpene alkaloids. Also, the in vitro antioxidant assays (2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), ferric reducing antioxidant power (FRAP), cupric reducing antioxidant capacity (CUPRAC), metal chelating and phosphomolybdenum) and enzyme inhibition (cholinesterases, tyrosinase, α-amylase, and α-glucosidase) potentials of the different Consolida methanolic extracts were evaluated. The UHPLC-QTOF profiling revealed 492 compounds, being 236 flavonoids, 93 phenolic acids, 78 tyrosol derivatives, 49 diterpene alkaloids, 29 lignans, and 7 stilbenes. The cumulative phenolic content ranged from 17.65 mg Eq./g for C. staminosa up to 43.04 mg Eq./g for C. glandulosa, whilst the total diterpene alkaloids content was exclusively found in C. glandulosa extracts (3.53 mg Eq./g). Consolida regalis (58. 61 mg trolox equivalent (TE)/g for DPPH and 65.38 mg TE/g for ABTS) and C. stenocarpa (46.81 mg TE/g for DPPH and 78.12 mg TE/g for ABTS) exhibited the highest anti-radical abilities, while the best reducing power values were recorded for C. glandulosa (129.46 mg TE/g for CUPRAC and 77.01 mg TE/g for FRAP) and C. raveyi (124.56 mg TE/g for CUPRAC and 78.36 mg TE/g for FRAP). Also, following the cholinesterases inhibition assays, C. hellospontica and C. glandulosa exhibited the highest inhibitory effects. Regarding tyrosinase inhibitory effects, C. raveyi showed the highest value, being 126.60 mg kojic acid equivalent (KAE)/g, followed by C. glandulosa (125.82 mg KAE/g) and C. stenocarpa (123.09 mg KAE/g). Besides, Consolida staminosa showed potential inhibition against α-amylase, but low glucosidase inhibitory properties. Therefore, the present findings could provide a starting point for further investigations to promote the industrial exploitation of these species with the aim of designing novel phyto-pharmaceuticals.
Atıf Yapan Makale Bilgileri
Kurumlar (6)
Aksaray Üniversitesi
Aksaray, Turkey
Duy Tan University
Da Nang, Viet Nam
Selçuk Üniversitesi
Selçuklu, Turkey
Università Cattolica del Sacro Cuore, Campus di Piacenza e Cremona
Piacenza, Italy
University of Belgrade
Belgrade, Serbia
University of Mauritius
Reduit, Mauritius