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Piccolo V, Maisto M, Schiano E, Iannuzzo F, Keivani N, Manuela Rigano M, Santini A, Novellino E, Carlo Tenore G, Summa V. Phytochemical investigation and antioxidant properties of unripe tomato cultivars (Solanum lycopersicum L.). Food Chem 2024; 438:137863. [PMID: 37980871 DOI: 10.1016/j.foodchem.2023.137863] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 09/10/2023] [Accepted: 10/24/2023] [Indexed: 11/21/2023]
Abstract
Unripe tomatoes are among the main waste produced during tomato cultivation and processing. In this study, unripe tomatoes from seven different Italian cultivars have been investigated to evaluate their nutraceutical potential. Phytochemical investigation allowed shedding light on the identification of seventy-five bioactive compounds. The highest amount of polyphenolic and glycoalkaloids along with the high level of antioxidant activities was found in the Datterini tomatoes variety. The peculiarity of this variety is the high chlorogenic acid content, being ten times higher compared to the other cultivars examined. Moreover, the total α-tomatine amount has been found substantially higher (34.699 ± 1.101 mg/g dry weight) with respect to the other tomato varieties analyzed. Furthermore, the cultivars metabolomic profiles were investigated with the PCA approach. Based on Datterini cultivar's metabolomic profile, its waste-recovery could represent a good option for further added value products in pharmaceutical and nutraceutical areas with a high α-tomatine content.
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Affiliation(s)
- Vincenzo Piccolo
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Maria Maisto
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Elisabetta Schiano
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Fortuna Iannuzzo
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Niloufar Keivani
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Maria Manuela Rigano
- Department of Agricultural Sciences, University of Napoli Federico II, Via Università 100, 80055 Portici, Italy
| | - Antonello Santini
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Ettore Novellino
- Department of Medicine and Surgery, University Cattolica del Sacro Cuore, Largo Francesco Vito, 00168 Roma, Italy
| | - Gian Carlo Tenore
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Vincenzo Summa
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy.
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Bie S, Zhao S, Cai S, Yi J, Zhou L. The profiles of free, esterified and insoluble-bound phenolics in peach juice after high pressure homogenization and evaluation of their antioxidant capacities, cytoprotective effect, and inhibitory effects on α-glucosidase and dipeptidyl peptidase-Ⅳ. Food Chem X 2024; 21:101092. [PMID: 38223527 PMCID: PMC10784678 DOI: 10.1016/j.fochx.2023.101092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 01/16/2024] Open
Abstract
The phenolic profiles, antioxidant capacities, cytoprotective effect, and α-glucosidase and DPP-IV inhibitory capacity of free (FP), esterified (EP) and insoluble-bound (IBP) phenolic fractions in 'Lijiang snow' peach juice after high pressure homogenization (HPH) were investigated, and the molecular docking was used to explore the enzyme inhibition mechanism. HPH increased total phenolic and total flavonoid contents in three fractions without changing compositions. The IC50 of radicals scavenged by three fractions were all reduced by HPH. The best inhibition on intracellular ROS production were found for phenolic fractions after HPH at 300 MPa, with ROS levels ranged within 95.26-119.16 %. HPH at 300 MPa reduced the apoptosis rates of FP and EP by 16.52 % and 9.33 %, respectively. All phenolic fractions showed effective inhibition on α-glucosidase and DPP-IV by formation of hydrogen bonding and van der Waals forces. This study explored the feasibility of HPH to enhance the phenolics and bioactivity of peach juice.
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Affiliation(s)
- Shenke Bie
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
- Yunnan Engineering Research Center for Fruit & Vegetable Products, Kunming, Yunnan Province 650500, China
- International Green Food Processing Research and Development Center of Kunming City, Kunming, Yunnan Province 650500, China
- Yunnan Key Laboratory for Food Advanced Manufacturing, 650500 Kunming, China
| | - Shuai Zhao
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
- Yunnan Engineering Research Center for Fruit & Vegetable Products, Kunming, Yunnan Province 650500, China
- International Green Food Processing Research and Development Center of Kunming City, Kunming, Yunnan Province 650500, China
- Yunnan Key Laboratory for Food Advanced Manufacturing, 650500 Kunming, China
| | - Shengbao Cai
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
- Yunnan Engineering Research Center for Fruit & Vegetable Products, Kunming, Yunnan Province 650500, China
- International Green Food Processing Research and Development Center of Kunming City, Kunming, Yunnan Province 650500, China
- Yunnan Key Laboratory for Food Advanced Manufacturing, 650500 Kunming, China
| | - Junjie Yi
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
- Yunnan Engineering Research Center for Fruit & Vegetable Products, Kunming, Yunnan Province 650500, China
- International Green Food Processing Research and Development Center of Kunming City, Kunming, Yunnan Province 650500, China
- Yunnan Key Laboratory for Food Advanced Manufacturing, 650500 Kunming, China
| | - Linyan Zhou
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
- Yunnan Engineering Research Center for Fruit & Vegetable Products, Kunming, Yunnan Province 650500, China
- International Green Food Processing Research and Development Center of Kunming City, Kunming, Yunnan Province 650500, China
- Yunnan Key Laboratory for Food Advanced Manufacturing, 650500 Kunming, China
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Baiano A, De Gianni A, Previtali MA, Del Nobile MA, Novello V, de Palma L. Effects of defoliation on quality attributes of Nero di Troia (Vitis vinifera L.) grape and wine. Food Res Int 2015; 75:260-269. [PMID: 28454955 DOI: 10.1016/j.foodres.2015.06.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 05/28/2015] [Accepted: 06/03/2015] [Indexed: 11/19/2022]
Abstract
Field studies were conducted in Puglia (Italy) to evaluate the influence of defoliation around cluster zones on grape and wine quality. Nero di Troia grapes were subjected to four different treatments: N: no leaf removal; E: leaf removal in the area of the clusters along the east side (at complete veraison); E/W: leaf removal in the area of the clusters along the east and west side (at complete veraison); and F: almost complete leaf removal along the west side (at complete veraison) and at pre-harvest also along the east side. Grapes of defoliated vines generally showed higher sugar content, lower titratable acidity, total flavonoids, flavonoids different from anthocyanins, and total phenolic content than grapes from non-defoliated vines while their total anthocyanin concentration was not affected by defoliation at a significant level. Concerning wines, alcohol content, residual soluble solids, different forms of anthocyanins but also volatile acidity were generally higher in samples from defoliated vines. Differences were also highlighted among the defoliation treatments: the best results in terms of dry matter, sugar and alcohol content were observed in the samples submitted to the more severe defoliation as a consequence of the higher light availability and berry temperature. Concerning the concentration of the individual phenolics, significant differences were highlighted for: caffeic and caftaric acids, peonidin- and malvidin-3-p-coumaroylglucoside, which were higher in the E wines; quercetin-3-glucoside, galactoside, and rhamnoside, and procyanidins, which were higher in F wines.
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Affiliation(s)
- Antonietta Baiano
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy.
| | - Antonio De Gianni
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
| | - Maria Assunta Previtali
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
| | - Matteo Alessandro Del Nobile
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
| | - Vittorino Novello
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, University of Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy
| | - Laura de Palma
- Dipartimento di Scienze Agrarie, degli Alimenti e dell'Ambiente, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
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Kiprovski B, Mikulic-Petkovsek M, Slatnar A, Veberic R, Stampar F, Malencic D, Latkovic D. Comparison of phenolic profiles and antioxidant properties of European Fagopyrum esculentum cultivars. Food Chem 2015; 185:41-7. [PMID: 25952839 DOI: 10.1016/j.foodchem.2015.03.137] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 03/20/2015] [Accepted: 03/23/2015] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to investigate composition and content of phenolic compounds in seeds of common buckwheat (Fagopyrum esculentum Moench) cultivars from Western, Central and Southeastern Europe grown in the Balkan area, and to compare them with cultivars from the Balkan. Mostly detected hydroxycinnamic acids in seeds of the investigated cultivars were caffeic and chlorogenic acid derivatives. More than ten different flavanols were detected in the investigated seeds, based on which all tested buckwheat cultivars were divided into two groups: those with high propelargonidins (epiafzelechin-epicatechin) and those with high procyanidins contents. 'Novosadska' had the highest level of phenolic acids, proanthocyanidins, flavones and most of the flavonols. However, 'Bosna 1' and 'Bosna 2' were highlighted with the greatest rutin content (up to 46 times higher than in other cultivars). All buckwheat cultivars had quite high antioxidant capacity (more than 80% of neutralized radicals), yet, 'Novosadska', 'Godijevo', 'Spacinska 1' and 'Bamby' excelled.
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Affiliation(s)
- Biljana Kiprovski
- University of Novi Sad, Faculty of Agriculture, Department of Field and Vegetable Crops, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
| | - Maja Mikulic-Petkovsek
- University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Chair for Fruit, Wine and Vegetable Growing, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Ana Slatnar
- University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Chair for Fruit, Wine and Vegetable Growing, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Robert Veberic
- University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Chair for Fruit, Wine and Vegetable Growing, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Franci Stampar
- University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Chair for Fruit, Wine and Vegetable Growing, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Djordje Malencic
- University of Novi Sad, Faculty of Agriculture, Department of Field and Vegetable Crops, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
| | - Dragana Latkovic
- University of Novi Sad, Faculty of Agriculture, Department of Field and Vegetable Crops, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
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Suriano S, Alba V, Tarricone L, Di Gennaro D. Maceration with stems contact fermentation: effect on proanthocyanidins compounds and color in Primitivo red wines. Food Chem 2015; 177:382-9. [PMID: 25660901 DOI: 10.1016/j.foodchem.2015.01.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/08/2015] [Accepted: 01/09/2015] [Indexed: 11/28/2022]
Abstract
Three Primitivo (Vitis vinifera, cv.) red wines were microvinified by means of different winemaking technologies: no stem-contact fermentation destemming 100% of grapes (D100); stem-contact fermentation destemming 75%, 50% of grapes (D75-D50) respectively. The objectives of this work were to improve proanthocyanidins content in wine, to monitor the relationships between anthocyanins/tannins and to detect the effects on the polymerization state of polyphenols after 12 months storage of wines. D100 showed higher anthocyanins content but lower color intensity and phenolic compounds content with respect to the theses D75 and D50, the last two showing lower anthocyanins content due their partial adsorption by grape stems during the fermentation. D75 gave the best results in terms of anthocyanins/color intensity balance and showed a better wine tannin component with respect to D50. Moreover after 12 months storage D50 reached a more advanced and stable polymerization state of colored pigments than the other wines.
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Affiliation(s)
- Serafino Suriano
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per l'Uva da Tavola e la Vitivinicoltura in Ambiente Mediterraneo, Cantina Sperimentale di Barletta, Via Vittorio Veneto 26, 76121 Barletta, Italy.
| | - Vittorio Alba
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per l'Uva da Tavola e la Vitivinicoltura in Ambiente Mediterraneo, Via Casamassima 148, 70010 Turi, BA, Italy.
| | - Luigi Tarricone
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per l'Uva da Tavola e la Vitivinicoltura in Ambiente Mediterraneo, Cantina Sperimentale di Barletta, Via Vittorio Veneto 26, 76121 Barletta, Italy.
| | - Domenico Di Gennaro
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Unità di Ricerca per l'Uva da Tavola e la Vitivinicoltura in Ambiente Mediterraneo, Cantina Sperimentale di Barletta, Via Vittorio Veneto 26, 76121 Barletta, Italy.
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Kanno H, Kawakami Z, Tabuchi M, Mizoguchi K, Ikarashi Y, Kase Y. Protective effects of glycycoumarin and procyanidin B1, active components of traditional Japanese medicine yokukansan, on amyloid β oligomer-induced neuronal death. J Ethnopharmacol 2015; 159:122-128. [PMID: 25446602 DOI: 10.1016/j.jep.2014.10.058] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Yokukansan, a traditional Japanese (Kampo) medicine, is composed of seven medicinal herbs, and has been traditionally used to treat neurosis, insomnia, and night crying and irritability in children. Yokukansan and its constituent herbs, Glycyrrhiza and Uncaria Hook, have recently been shown to have protective effects against amyloid β (Aβ) oligomer-induced apoptosis by suppressing the activation of caspase-3 in primary cultured neurons. The aim of the present study was to identify the effective components of Glycyrrhiza and Uncaria Hook against Aβ oligomer-induced neurotoxicity. We also attempted to clarify the mechanisms by which yokukansan and these herbs, as well as their components, suppressed the activation of caspase-3 in Aβ oligomer-treated neurons. MATERIALS AND METHODS Rat primary cultured cortical neurons were treated with Aβ oligomer (3 μM). The protective effects of 16 components derived from Glycyrrhiza or Uncaria Hook against Aβ oligomer-induced neurotoxicity were determined using the MTT reduction assay 48 h after the treatment. The suppressive effects of the test substances, i.e., yokukansan, Glycyrrhiza, Uncaria Hook, and screened components, on the Aβ oligomer-induced activation of caspase-3(/7) were evaluated using the caspase-Glo assay 48 h after the Aβ oligomer treatment. The suppressive effects of the test substances on the activation of caspase-8 and -9, both of which are located upstream of caspase-3, were also examined 24h after the Aβ oligomer treatment. RESULTS Two of the 16 components tested, glycycoumarin derived from Glycyrrhiza and procyanidin B1 derived from Uncaria Hook, significantly inhibited Aβ oligomer-induced neuronal death in a dose-dependent manner. Glycyrrhiza, Uncaria Hook, and yokukansan significantly suppressed the Aβ oligomer-induced activation of caspase-3 as well as caspase-8 and -9. Glycycoumarin also suppressed the activation of caspase-3, but not caspase-8 and -9. Procyanidin B1 suppressed the activation of caspase-3, -8, and -9. CONCLUSIONS Our results demonstrated that glycycoumarin and procyanidin B1 had ameliorative effects on Aβ oligomer-induced neurotoxicity. The neuroprotective effects of glycycoumarin are thought to be due to the attenuated activation of caspase-3, but not caspase-8 or -9. Procyanidin B1, as well as yokukansan, Glycyrrhiza, and Uncaria Hook, may attenuate the activation of caspase-3 by inhibiting that of caspase-8 and -9.
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Affiliation(s)
- Hitomi Kanno
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan.
| | - Zenji Kawakami
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan
| | - Masahiro Tabuchi
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan
| | - Kazushige Mizoguchi
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan
| | - Yasushi Ikarashi
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan
| | - Yoshio Kase
- Tsumura Research Laboratories, Kampo Scientific Strategies Division, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan
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Wittenauer J, Mäckle S, Sußmann D, Schweiggert-Weisz U, Carle R. Inhibitory effects of polyphenols from grape pomace extract on collagenase and elastase activity. Fitoterapia 2015; 101:179-87. [PMID: 25598188 DOI: 10.1016/j.fitote.2015.01.005] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/06/2015] [Accepted: 01/08/2015] [Indexed: 12/24/2022]
Abstract
Breakdown and disorganization of extracellular matrix proteins like collagen, fibronectin and elastin are main characteristics of skin aging due to the enhanced activation of proteolytic enzymes such as collagenases and elastases. Inhibition of their enzymatic activities by natural plant compounds might be a promising approach to prevent extrinsic skin aging. Especially polyphenols are supposed to interact with those enzymes due to their molecular nature. In our investigation, extracts of pomace from Riesling grapes were analyzed for their inhibitory properties on collagenase as well as elastase. Crude grape pomace extract showed a dose-dependent inhibitory activity against both enzymes with IC50-values of 20.3μg/ml and 14.7μg/ml for collagenase and elastase activity, respectively. The extracts were fractionated into four fractions containing phenolic compounds differing in chemical structure and polarity. Except for the stilbene containing fraction, all other fractions showed inhibitory effects on both enzyme activities. The most pronounced impact was found for the hydrophilic low molecular weight polyphenols containing the free phenolic acids. In particular, gallic acid showed considerable inhibition values. EGCG was used as a positive control and showed a dose-dependent inhibition of collagenase activity (IC50=0.9mM).
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Affiliation(s)
- Judith Wittenauer
- Fraunhofer Institute for Process Engineering and Packaging, Department of Process Development for Plant Raw Materials, Giggenhauser Str. 35, D-85354 Freising, Germany; Hohenheim University, Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology, Garbenstraße 25, D-70599 Stuttgart, Germany.
| | - Sonja Mäckle
- Fraunhofer Institute for Process Engineering and Packaging, Department of Process Development for Plant Raw Materials, Giggenhauser Str. 35, D-85354 Freising, Germany; Hohenheim University, Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology, Garbenstraße 25, D-70599 Stuttgart, Germany
| | - Daniela Sußmann
- Fraunhofer Institute for Process Engineering and Packaging, Department of Process Development for Plant Raw Materials, Giggenhauser Str. 35, D-85354 Freising, Germany
| | - Ute Schweiggert-Weisz
- Fraunhofer Institute for Process Engineering and Packaging, Department of Process Development for Plant Raw Materials, Giggenhauser Str. 35, D-85354 Freising, Germany
| | - Reinhold Carle
- Hohenheim University, Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology, Garbenstraße 25, D-70599 Stuttgart, Germany; King Abdulaziz University, Biological Science Department, Faculty of Science, P.O. Box 80257, Jeddah 21589, Saudi Arabia
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Phansalkar RS, Nam JW, Chen SN, McAlpine JB, Napolitano JG, Leme A, Vidal CM, Aguiar T, Bedran-Russo AK, Pauli GF. A galloylated dimeric proanthocyanidin from grape seed exhibits dentin biomodification potential. Fitoterapia 2015; 101:169-78. [PMID: 25542682 DOI: 10.1016/j.fitote.2014.12.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/12/2014] [Accepted: 12/16/2014] [Indexed: 11/22/2022]
Abstract
Grape seeds are a rich source of polyphenols, especially proanthocyanidins (PACs), and are also known for the presence of galloylated oligomeric PACs (OPACs). The present study focuses on the phytochemical methodology for grape seed (O)PACs and their potential role as dentin biomodifiers to be used in restorative and reparative dentistry. A new method using centrifugal partition chromatography (CPC) was developed for the preparative separation of the grape seed (O)PACs. Orthogonal phytochemical profiling of the resulting CPC fractions was performed using C18 and diol HPLC, normal phase HPTLC, and IT-TOF MS analysis. A galloylated procyanidin dimer (1) was isolated from a CPC fraction in order to evaluate its potential to enhance dentin bio-mechanical properties. Moreover, it helped to evaluate the impact of the galloyl moiety on the observed bioactivity. Structure elucidation was performed using ESI-MS, 1D and 2D NMR analyses. For the first time, (1)H iterative full spin analysis (HiFSA) was performed on this type of molecule, enabling a detailed proton chemical shift and coupling constant assignment. The CPC fractions as well as 1 showed promising results in the dentin stiffness bioassay and indicate that they may be used as dental intervention biomaterial.
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