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Kerbab K, Sansone F, Zaiter L, Esposito T, Celano R, Franceschelli S, Pecoraro M, Benayache F, Rastrelli L, Picerno P, Aquino RP, Mencherini T. Halimium halimifolium: From the Chemical and Functional Characterization to a Nutraceutical Ingredient Design. Planta Med 2019; 85:1024-1033. [PMID: 31261420 DOI: 10.1055/a-0953-6007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Halimium halimifolium (Hh) is a shrub used in Algerian folk medicine to treat gastrointestinal pain. An UHPLC-PDA-ESI/MSn method was developed to identify the metabolic profile of the traditionally used infusion (Hh-A) from the aerial parts. The structures of flavanols were confirmed by NMR analysis after the isolation procedure from a hydrohalcolic extract (Hh-B) that also allowed for the identification of phenolic acids, an aryl butanol glucoside, and different derivatives of quercetin, myricetin, and kaempferol. Tiliroside isomers were the chemical markers of Hh-A and Hh-B (54.33 and 36.00 mg/g, respectively). Hh-A showed a significant scavenging activity both against the radicals 1,1-diphenyl-2-picrylhydrazyl and 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (EC50 = 10.49 µg/mL and TEAC value = 1.98 mM Trolox/mg infusion) and the lipopolysaccharide-induced reactive oxygen species release in A375 and HeLa cells. Moreover, the antihyperglycemic properties, by inhibiting the α-amylase and α-glucosidase enzymes (IC50 = 0.82 mg/mL and 25.01 µg/mL, respectively), were demonstrated. To upgrade the therapeutic effect, a microencapsulation process is proposed as a strategy to optimize stability, handling, and delivery of bioactive components, avoiding the degradation and loss of the biological efficacy after oral intake. Hh-loaded microparticles were designed using cellulose acetate phthalate as the enteric coating material and spray drying as a production process. The results showed a satisfactory process yield (67.9%), encapsulation efficiency (96.7%), and micrometric characteristics of microparticles (laser-scattering, fluorescent, and scanning electron microscopy). In vitro dissolution studies (USPII-pH change method) showed that Hh-loaded microparticles are able to prevent the release and degradation of the bioactive components in the gastric tract, releasing them into the intestinal environment.
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Affiliation(s)
- Khawla Kerbab
- Unité de recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques (VARENBIOMOL), Département de Chimie, Faculté des Sciences Exactes, Université Constantine 1, Constantine, Algérie
| | | | - Lahcene Zaiter
- Unité de recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques (VARENBIOMOL), Département de Chimie, Faculté des Sciences Exactes, Université Constantine 1, Constantine, Algérie
| | - Tiziana Esposito
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Rita Celano
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | | | - Michela Pecoraro
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Fadila Benayache
- Unité de recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques (VARENBIOMOL), Département de Chimie, Faculté des Sciences Exactes, Université Constantine 1, Constantine, Algérie
| | - Luca Rastrelli
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Patrizia Picerno
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
| | - Rita P Aquino
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
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Kerbab K, Mekhelfi T, Zaiter L, Benayache S, Benayache F, Picerno P, Mencherini T, Sansone F, Aquino RP, Rastrelli L. Chemical composition and antioxidant activity of a polar extract of Thymelaea microphylla Coss. et Dur. Nat Prod Res 2014; 29:671-5. [PMID: 25422072 DOI: 10.1080/14786419.2014.979422] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Thymelaea microphylla Coss. et Dur. (Thymelaeaceae) is a rare medicinal plant endemic to Algeria. In order to continue our studies on this species, herein we report the isolation and characterisation of 20 compounds from a hydroalcoholic extract (EtOH-H2O 7:3) of the aerial parts. They include monoterpene glucosides (1-3), phenolic acid derivatives (4, 8 and 9), phenylpropanoid glucosides (5 and 6), flavonoids (7, 10 and 11), a benzyl alcohol glucoside (12), ionol glucosides (13-16), lignans (17-19) and a bis-coumarin (20). All the structures were elucidated by spectroscopic methods including 1D and 2D NMR experiments, as well as ESI-MS analysis. Moreover, the extract of T. microphylla showed a significant and concentration-dependent free radical-scavenging activity in vitro, correlated to the presence of phenolic and chlorogenic acid derivatives (8, 9 and 4).
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Affiliation(s)
- Khawla Kerbab
- a Unité de recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques (VARENBIOMOL), Université Constantine 1 , Route de Aïn El Bey, Constantine , Algérie
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