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Liu L, Li J, Zhang L, Wei S, Qin Z, Liang D, Ding B, Chen H, Song W. Conformational changes of tyrosinase caused by pentagalloylglucose binding: Implications for inhibitory effect and underlying mechanism. Food Res Int 2022; 157:111312. [DOI: 10.1016/j.foodres.2022.111312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/24/2022] [Accepted: 04/26/2022] [Indexed: 11/25/2022]
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Skowrońska W, Granica S, Czerwińska ME, Osińska E, Bazylko A. Sambucus nigra L. leaves inhibit TNF-α secretion by LPS-stimulated human neutrophils and strongly scavenge reactive oxygen species. JOURNAL OF ETHNOPHARMACOLOGY 2022; 290:115116. [PMID: 35182667 DOI: 10.1016/j.jep.2022.115116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Sambucus nigra (elderberry) leaves were used in folk medicine to treat skin inflammations, ulcers, burns or boils, as well as to treat wounds, including infected and chronic ones. For centuries, elderberry leaves have been used mainly in eastern and southern Europe, as well as in western Asia. AIM OF THE STUDY The study aimed to investigate the anti-inflammatory and antioxidant activity of four different extracts, such as aqueous and ethanolic prepared at room temperature and the solvent's boiling point, from the leaves of elderberry. MATERIALS AND METHODS The effect of extracts both on the secretion of cytokines (TNF-α, IL-1β, and IL-8) and reactive oxygen species (ROS) by neutrophils stimulated with bacteria-derived products was investigated. The cytotoxicity of extracts was analyzed by staining with propidium iodide measured by flow cytometry. The anti-inflammatory activity of extracts was also investigated through their influence on lipoxygenase activity. The antioxidant properties, including scavenging superoxide anion, hydrogen peroxide, nitric oxide, and 2,2-diphenyl-1-picrylhydrazyl radical were investigated in cell-free systems. The total content of phenolic compounds was tested using the Folin-Ciocalteu reagent. The qualitative and quantitative determination of the content of individual phenolic acids and flavonoids was performed by HPLC-DAD-MSn and HPLC-DAD method, respectively. RESULTS Elderberry leaves extracts turned out to affect the inflammatory response of neutrophils by inhibiting the secretion of TNF-α and ROS. The ethanolic and aqueous extracts at a concentration of 50 μg × mL-1 reduce the secretion of TNF-α by approximately 40% and 10%, respectively. ROS secretion was decreased by around 50% for all extracts at concentration of 5 μg × mL-1. All the extracts were able to inhibit the activity of lipoxygenase. The ethanolic extracts were characterized by a higher content of phenolic compounds and a higher antioxidant activity, especially against nitric oxide, compared to the aqueous extracts. CONCLUSIONS Our research has confirmed that elderberry leaves are a plant material with anti-inflammatory activity, especially against reactive oxygen species, and a potentially rich source of antioxidants. Preliminary analyses performed in this study could be the first step in confirming the traditional use of elderberry leaves in relieving inflammation.
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Affiliation(s)
- Weronika Skowrońska
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland.
| | - Sebastian Granica
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland; Microbiota Lab, Centre of Preclinical Studies, Medical University of Warsaw, Banacha 1b, 02-097, Warsaw, Poland.
| | - Monika E Czerwińska
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland; Centre for Preclinical Research, Medical University of Warsaw, Banacha 1b, 02-097, Warsaw, Poland.
| | - Ewa Osińska
- Institute of Horticulture Sciences, Department of Vegetable and Medicinal Plants, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776, Warsaw, Poland.
| | - Agnieszka Bazylko
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland.
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Chemical Characteristics and Antioxidant Activity of Arctostaphylos uva-ursi L. Spreng. at the Southern Border of the Geographical Range of the Species in Europe. Molecules 2021; 26:molecules26247692. [PMID: 34946773 PMCID: PMC8707569 DOI: 10.3390/molecules26247692] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 01/28/2023] Open
Abstract
The bearberry (Arctostaphylos uva-ursi L. Spreng.) is a source of herbal material—bearberry leaf (Uvae ursi folium), which is highly valued and sought by pharmaceutical and cosmetic industries. For many years, leaves of this plant have been used in traditional medicine as a diuretic, antimicrobial, and anti-inflammatory agent for various diseases of the urogenital tract. The bearberry has also been proposed as a natural antioxidant additive due to the high contents of phenolic compounds in its leaves. The study was focused on characterization of the basic phytochemical composition and antioxidant activity of extracts derived from bearberry leaves collected from plants located at the southern border of the geographical range of the species in Europe. The investigated herbal material is characterized by a different chemical profile compared to the chemical profiles of bearberry found in other parts of the continent. Bearberry extracts from plants growing in two different habitat types—heathlands and pine forests showed a wide range of variation, especially in the concentration of hyperoside, corilagin, and methylartutin and the total flavonoid contents. In addition to arbutin, bearberry can be a valuable source of phenolic compounds, which are mainly responsible for the antioxidant properties of extracts. The high content of phenols and high values of antioxidant parameters indicate a high potential of bearberry leaves to be used as a powerful natural source of antioxidants in herbal preparations. Therefore, the A. uva-ursi populations can be a source of plant material for pharmaceutical, cosmetic, and food industries.
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Shawky EM, Elgindi MR, Ibrahim HA, Baky MH. The potential and outgoing trends in traditional, phytochemical, economical, and ethnopharmacological importance of family Onagraceae: A comprehensive review. JOURNAL OF ETHNOPHARMACOLOGY 2021; 281:114450. [PMID: 34314807 DOI: 10.1016/j.jep.2021.114450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/04/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Onagraceae is a widely distributed family of flowering plants comprises about 17 genera and more than 650 species of herbs, shrubs, and trees. Onagraceae also common as willowherb family or evening primrose family is divided into two subfamilies; Ludwigioideae (mainly genus; Ludwigia) and Onagroideae. Family Onagraceae is characterized by its numerous traditional uses as treatment of hormonal imbalances, urinary system ailments, prostate health maintenance, and antimicrobial effects. AIM OF THE STUDY This review aims to introduce a holistic overview on the phytochemical composition, economical importance and ethnopharmacological value of different species of family Onagraceae. MATERIALS AND METHODS Literature review was performed using different data bases such as PubMed, Web of Science, Google Scholar and Reaxys searching for articles focused on phytochemical composition, bioactivity and ethnopharmacological history of Onagraceae species. RESULTS Different species of Onagraceae were reported to have a great variety of phytochemicals including flavonoids, tannins, phenolic acids, triterpenoids, saponins, and volatile/fixed oils. Onagraceae exhibited several health benefits and pharmacological activities including anti-inflammatory, antiarthritic and analgesic, antioxidant, cytotoxic, antidiabetic, and antimicrobial. CONCLUSIONS Family Onagraceae is an extremely important family with diverse phytochemical composition which enriches their pharmacological importance and hence it's commercial and economical value.
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Affiliation(s)
- Enas M Shawky
- Department of Pharmacognosy, Faculty of Pharmacy, Egyptian Russian University. Badr City, 11829, Cairo, Egypt
| | - Mohamed R Elgindi
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Haitham A Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Mostafa H Baky
- Department of Pharmacognosy, Faculty of Pharmacy, Egyptian Russian University. Badr City, 11829, Cairo, Egypt.
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Guo S, Meng J, Cao Z, Yang Y, He D, Gu D. A rational route based on liquid-liquid-refining extraction and high-speed counter-current chromatography for separation of target compound from Toona sinensis. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.104125] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Phytochemicals in Malignant Pleural Mesothelioma Treatment-Review on the Current Trends of Therapies. Int J Mol Sci 2021; 22:ijms22158279. [PMID: 34361048 PMCID: PMC8348618 DOI: 10.3390/ijms22158279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/24/2021] [Accepted: 07/28/2021] [Indexed: 12/15/2022] Open
Abstract
Malignant pleural mesothelioma (MPM) is a rare but highly aggressive tumor of pleura arising in response to asbestos fibers exposure. MPM is frequently diagnosed in the advanced stage of the disease and causes poor prognostic outcomes. From the clinical perspective, MPM is resistant to conventional treatment, thus challenging the therapeutic options. There is still demand for improvement and sensitization of MPM cells to therapy in light of intensive clinical studies on chemotherapeutic drugs, including immuno-modulatory and targeted therapies. One way is looking for natural sources, whole plants, and extracts whose ingredients, especially polyphenols, have potential anticancer properties. This comprehensive review summarizes the current studies on natural compounds and plant extracts in developing new treatment strategies for MPM.
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Arnold F, Muzzio N, Patnaik SS, Finol EA, Romero G. Pentagalloyl Glucose-Laden Poly(lactide- co-glycolide) Nanoparticles for the Biomechanical Extracellular Matrix Stabilization of an In Vitro Abdominal Aortic Aneurysm Model. ACS APPLIED MATERIALS & INTERFACES 2021; 13:25771-25782. [PMID: 34030437 DOI: 10.1021/acsami.1c05344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The suppression of abdominal aortic aneurysm (AAA) growth by nonsurgical therapy is currently not an option, and AAA is considered an irreversible destructive disease. The formation and development of AAA is associated with the progressive deterioration of the aortic wall. Infiltrated macrophages and resident vascular smooth muscle cells oversecrete matrix metalloproteinases (MMPs), which cause the loss of crucial aortic extracellular matrix (ECM) components, thus weakening the aortic wall. Stabilization of the aortic ECM could enable the development of novel therapeutic options for preventing and reducing AAA progression. In the present work, we studied the biochemical and biomechanical interactions of pentagalloyl glucose (PGG) on mouse C2C12 myoblast cells. PGG is a naturally occurring ECM-stabilizing polyphenolic compound that has been studied in various applications, including vascular health, with promising results. With its known limitations of systemic administration, we also studied the administration of PGG when encapsulated within poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs). Treatment with collagenase and elastase enzymes was used to mimic a pathway of degenerative effects seen in the pathogenesis of human AAA. PGG and PLGA(PGG) NPs were added to enzyme-treated cells in either a suppressive or preventative scenario. Biomolecular interactions were analyzed through cell viability, cell adhesion, reactive oxygen species (ROS) production, and MMP-2 and MMP-9 secretion. Biomechanical properties were studied through atomic force microscopy and quartz crystal microbalance with dissipation. Our results suggest that PGG or PLGA(PGG) NPs caused minor to no cytotoxic effects on the C2C12 cells. Both PGG and PLGA(PGG) NPs showed reduction in ROS and MMP-2 secretion if administered after enzymatic ECM degradation. A quantitative comparison of Young's moduli showed a significant recovery in the elastic properties of the cells treated with PGG or PLGA(PGG) NPs after enzymatic ECM degradation. This work provides preliminary support for the use of a pharmacological therapy for AAA treatment.
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Affiliation(s)
- Frances Arnold
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Nicolas Muzzio
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Sourav S Patnaik
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Ender A Finol
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Gabriela Romero
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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Mainka M, Czerwińska ME, Osińska E, Ziaja M, Bazylko A. Screening of Antioxidative Properties and Inhibition of Inflammation-Linked Enzymes by Aqueous and Ethanolic Extracts of Plants Traditionally Used in Wound Healing in Poland. Antioxidants (Basel) 2021; 10:antiox10050698. [PMID: 33925100 PMCID: PMC8146166 DOI: 10.3390/antiox10050698] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/22/2021] [Accepted: 04/25/2021] [Indexed: 12/16/2022] Open
Abstract
A wide range of plant-derived preparations have been used against skin inflammatory disorders and as wound healing agents in traditional medicine. The purpose of the study was to determine the antioxidant activity of aqueous and 70% ethanolic extracts from eleven species of plants traditionally used in Poland to treat inflammatory skin diseases. The ability of extracts to scavenge 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), hydrogen peroxide (H2O2), and superoxide anion (O2•−), was studied. In non-cellular studies, an analysis of the anti-inflammatory effect on the activity of enzymes, such as hyaluronidase (HYAL) and lipoxygenase (LOX), was also performed. The chemical profiles of the most active extracts were achieved by applying the UHPLC-DAD-MSn method, and the sum of polyphenols in all tested extracts was determined by the colorimetric method with the Folin–Ciocalteu reagent. The scope of the extracts’ influence on enzyme activity was significantly lower than their antioxidant activity. All extracts have shown high activity in free radical scavenging against DPPH. The ethanolic extracts have shown high potential to scavenge H2O2. The study of composition showed that the main components of the tested extracts were flavonoids, such as luteolin, apigenin, kaempferol, and quercetin derivatives, as well as caffeoylquinic acids, caffeic acid, and its conjugates.
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Affiliation(s)
- Marta Mainka
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Warsaw Medical University, Banacha 1, 02-097 Warsaw, Poland; (M.M.); (M.E.C.)
| | - Monika E. Czerwińska
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Warsaw Medical University, Banacha 1, 02-097 Warsaw, Poland; (M.M.); (M.E.C.)
| | - Ewa Osińska
- Department of Vegetable and Medicinal Plants, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776 Warsaw, Poland;
| | - Maria Ziaja
- Institute of Physical Culture Studies, Rzeszów University, Cicha 2a, 35-326 Rzeszów, Poland;
| | - Agnieszka Bazylko
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Warsaw Medical University, Banacha 1, 02-097 Warsaw, Poland; (M.M.); (M.E.C.)
- Correspondence:
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Ko HH, Chang YT, Kuo YH, Lin CH, Chen YF. Oenothera laciniata Hill Extracts Exhibits Antioxidant Effects and Attenuates Melanogenesis in B16-F10 Cells via Downregulating CREB/MITF/Tyrosinase and Upregulating p-ERK and p-JNK. PLANTS 2021; 10:plants10040727. [PMID: 33917957 PMCID: PMC8068348 DOI: 10.3390/plants10040727] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 04/06/2021] [Indexed: 01/14/2023]
Abstract
Oenothera laciniata Hill is a perennial herb traditionally used to alleviate inflammatory complications. This study investigated the antioxidant and anti-melanogenic activities of O. laciniata. The methanolic extract (OLM) of O. laciniata and its different fractions, including ethyl acetate (OLEF), n-butanol (OLBF), and water (OLWF) fractions, were prepared. Antioxidant activities were evaluated by total phenolic content, the radical-scavenging effect on 2,2-diphenyl-1-picrylhydrazyl (DPPH•), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS+•), and superoxide anion (O2−•), reducing capacity, and metal chelating ability. OLM and its fractions exhibited potent antioxidant activity in these in vitro assays, with a correlation between radical-scavenging activity and total phenolic content. OLM and its fractions inhibited the mushroom tyrosinase activity superior to the reference control, ascorbic acid. In B16-F10 melanoma cells, OLM and its fractions significantly decreased melanin production and tyrosinase activity. Mechanistic investigations revealed that OLM and its fractions inhibited tyrosinase and TRP-2 expressions via downregulating MITF and phosphorylated CREB and differentially inducing ERK or JNK phosphorylation. Additionally, OLM and its fractions caused no significant cytotoxicity towards B16-F10 or skin fibroblast cells at concentrations used in these cellular assays. These findings demonstrated the potential of O. laciniata extracts as the ideal skin protective agent with dual antioxidant and anti-melanogenic activities.
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Affiliation(s)
- Horng-Huey Ko
- Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (H.-H.K.); (Y.-T.C.)
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yeo-Tzu Chang
- Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (H.-H.K.); (Y.-T.C.)
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 40402, Taiwan;
- Chinese Medicine Research Center, China Medical University, Taichung 40402, Taiwan
- Department of Biotechnology, Asia University, Taichung 41354, Taiwan
| | - Chia-Hsuan Lin
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Yih-Fung Chen
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Correspondence: ; Tel.: +886-7-3121101 (ext. 2765)
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Polyphenol Extract from Evening Primrose ( Oenothera paradoxa) Inhibits Invasion Properties of Human Malignant Pleural Mesothelioma Cells. Biomolecules 2020; 10:biom10111574. [PMID: 33228230 PMCID: PMC7699585 DOI: 10.3390/biom10111574] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/10/2020] [Accepted: 11/18/2020] [Indexed: 01/10/2023] Open
Abstract
Extracts from the defatted evening primrose (Oenothera paradoxa Hudziok) seeds are the source of a range of stable polyphenolic compounds, including ellagic acid, gallic acid, and catechin. Our studies evaluate, for the first time, the influence of evening primrose isopropanol extract (EPE) on malignant pleural mesothelioma (MPM) cells. MPM is rarely diagnosed, its high aggressiveness and frequently noted chemoresistance limit its treatment schemes and it is characterized by low prognostic features. Here, we demonstrate that EPE inhibited MPM growth in a dose-dependent manner in cells with increased invasion properties. Moreover, EPE treatment resulted in cell cycle arrest in the G2/M phase and increased apoptosis in invasive MPM cell lines. Additionally, EPE strongly limited invasion and MMP-7 secretion in MPM cancer cells. Our original data provide evidence about the potential anti-invasive effects of EPE in MPM therapy treatment.
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Zhang L, Liu Y, Hu X, Xu M, Wang Y. Studies on interactions of pentagalloyl glucose, ellagic acid and gallic acid with bovine serum albumin: A spectroscopic analysis. Food Chem 2020; 324:126872. [DOI: 10.1016/j.foodchem.2020.126872] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/10/2020] [Accepted: 04/18/2020] [Indexed: 01/09/2023]
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12
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Najarzadeh Z, Mohammad-Beigi H, Nedergaard Pedersen J, Christiansen G, Sønderby TV, Shojaosadati SA, Morshedi D, Strømgaard K, Meisl G, Sutherland D, Skov Pedersen J, Otzen DE. Plant Polyphenols Inhibit Functional Amyloid and Biofilm Formation in Pseudomonas Strains by Directing Monomers to Off-Pathway Oligomers. Biomolecules 2019; 9:E659. [PMID: 31717821 PMCID: PMC6920965 DOI: 10.3390/biom9110659] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/19/2019] [Accepted: 10/23/2019] [Indexed: 02/07/2023] Open
Abstract
Self-assembly of proteins to β-sheet rich amyloid fibrils is commonly observed in various neurodegenerative diseases. However, amyloid also occurs in the extracellular matrix of bacterial biofilm, which protects bacteria from environmental stress and antibiotics. Many Pseudomonas strains produce functional amyloid where the main component is the highly fibrillation-prone protein FapC. FapC fibrillation may be inhibited by small molecules such as plant polyphenols, which are already known to inhibit formation of pathogenic amyloid, but the mechanism and biological impact of inhibition is unclear. Here, we elucidate how polyphenols modify the self-assembly of functional amyloid, with particular focus on epigallocatechin gallate (EGCG), penta-O-galloyl-β-d-glucose (PGG), baicalein, oleuropein, and procyanidin B2. We find EGCG and PGG to be the best inhibitors. These compounds inhibit amyloid formation by redirecting the aggregation of FapC monomers into oligomeric species, which according to small-angle X-ray scattering (SAXS) measurements organize into core-shell complexes of short axis diameters 25-26 nm consisting of ~7 monomers. Using peptide arrays, we identify EGCG-binding sites in FapC's linker regions, C and N-terminal parts, and high amyloidogenic sequences located in the R2 and R3 repeats. We correlate our biophysical observations to biological impact by demonstrating that the extent of amyloid inhibition by the different inhibitors correlated with their ability to reduce biofilm, highlighting the potential of anti-amyloid polyphenols as therapeutic agents against biofilm infections.
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Affiliation(s)
- Zahra Najarzadeh
- Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran;
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
| | - Hossein Mohammad-Beigi
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
| | - Jannik Nedergaard Pedersen
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
| | - Gunna Christiansen
- Department of Biomedicine-Medical Microbiology and Immunology, Aarhus University, 8000 Aarhus C, Denmark;
| | - Thorbjørn Vincent Sønderby
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
| | - Seyed Abbas Shojaosadati
- Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran;
| | - Dina Morshedi
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box: 1417863171, Tehran, Iran;
| | - Kristian Strømgaard
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen Ø, Denmark;
| | - Georg Meisl
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK;
| | - Duncan Sutherland
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
| | - Jan Skov Pedersen
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Daniel E. Otzen
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, 8000 Aarhus C, Denmark; (H.M.-B.); (J.N.P.); (T.V.S.); (D.S.)
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Polyphenol Composition of Extracts of the Fruits of Laserpitium Krapffii Crantz and Their Antioxidant and Cytotoxic Activity. Antioxidants (Basel) 2019; 8:antiox8090363. [PMID: 31480628 PMCID: PMC6769964 DOI: 10.3390/antiox8090363] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/19/2019] [Accepted: 08/27/2019] [Indexed: 12/02/2022] Open
Abstract
During inflammation, reactive oxygen species (ROS) are produced in large amounts, causing oxidative stress. Several studies confirm that plant extracts rich in phenolic compounds may inhibit ROS production. For that reason, the aim of this work is the qualitative and quantitative analysis of phenolic acids and flavonoids in the etheric (LAEN) and methanolic (LAM) extracts of the fruits of Laserpitium krapffii Crantz, as well as their antioxidative and cytotoxic properties. Liquid chromatography–electrospray tandem mass spectroscopy (LC-ESI-MS/MS) enabled the identification of 12 phenolic acids and nine flavonoids. Both tested extracts scavenged ROS in a concentration-dependent manner. Stronger activity was observed for the methanolic extract. The cytotoxic effect of both extracts in increasing concentrations on five types of cancer cell lines was also investigated. The cytotoxicity was estimated using trypan blue vital staining. It was found that the analyzed extracts induced the apoptosis of the cells of all the tested cell lines. In conclusion, our results present that the fruits of L. krapffii can be a source of valuable compounds with protective effects against oxidative damage.
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Mikolajczyk TP, Nosalski R, Skiba DS, Koziol J, Mazur M, Justo-Junior AS, Kowalczyk P, Kusmierczyk Z, Schramm-Luc A, Luc K, Maffia P, Graham D, Kiss AK, Naruszewicz M, Guzik TJ. 1,2,3,4,6-Penta-O-galloyl-β-d-glucose modulates perivascular inflammation and prevents vascular dysfunction in angiotensin II-induced hypertension. Br J Pharmacol 2019; 176:1951-1965. [PMID: 30658013 PMCID: PMC6534792 DOI: 10.1111/bph.14583] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 10/26/2018] [Accepted: 12/02/2018] [Indexed: 12/16/2022] Open
Abstract
Background and Purpose Hypertension is a multifactorial disease, manifested by vascular dysfunction, increased superoxide production, and perivascular inflammation. In this study, we have hypothesized that 1,2,3,4,6‐penta‐O‐galloyl‐β‐d‐glucose (PGG) would inhibit vascular inflammation and protect from vascular dysfunction in an experimental model of hypertension. Experimental Approach PGG was administered to mice every 2 days at a dose of 10 mg·kg−1 i.p during 14 days of Ang II infusion. It was used at a final concentration of 20 μM for in vitro studies in cultured cells. Key Results Ang II administration increased leukocyte and T‐cell content in perivascular adipose tissue (pVAT), and administration of PGG significantly decreased total leukocyte and T‐cell infiltration in pVAT. This effect was observed in relation to all T‐cell subsets. PGG also decreased the content of T‐cells bearing CD25, CCR5, and CD44 receptors and the expression of both monocyte chemoattractant protein 1 (CCL2) in aorta and RANTES (CCL5) in pVAT. PGG administration decreased the content of TNF+ and IFN‐γ+ CD8 T‐cells and IL‐17A+ CD4+ and CD3+CD4−CD8− cells. Importantly, these effects of PGG were associated with improved vascular function and decreased ROS production in the aortas of Ang II‐infused animals independently of the BP increase. Mechanistically, PGG (20 μM) directly inhibited CD25 and CCR5 expression in cultured T‐cells. It also decreased the content of IFN‐γ+ CD8+ and CD3+CD4−CD8− cells and IL‐17A+ CD3+CD4−CD8− cells. Conclusion and Implication PGG may constitute an interesting immunomodulating strategy in the regulation of vascular dysfunction and hypertension. Linked Articles This article is part of a themed section on Immune Targets in Hypertension. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.12/issuetoc
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Affiliation(s)
- Tomasz P Mikolajczyk
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.,Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Ryszard Nosalski
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland.,Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Dominik S Skiba
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Joanna Koziol
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Magdalena Mazur
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Amauri S Justo-Junior
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Paulina Kowalczyk
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Warsaw, Poland
| | - Zofia Kusmierczyk
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Warsaw, Poland
| | - Agata Schramm-Luc
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Kevin Luc
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Pasquale Maffia
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.,Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK.,Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Delyth Graham
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Anna K Kiss
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Warsaw, Poland
| | - Marek Naruszewicz
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Warsaw, Poland
| | - Tomasz J Guzik
- Department of Internal and Agricultural Medicine, Jagiellonian University Medical College, Krakow, Poland.,Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
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Li FJ, Liu Y, Yuan Y, Yang B, Liu ZM, Huang LQ. Molecular interaction studies of acetylcholinesterase with potential acetylcholinesterase inhibitors from the root of Rhodiola crenulata using molecular docking and isothermal titration calorimetry methods. Int J Biol Macromol 2017. [DOI: 10.1016/j.ijbiomac.2017.06.066] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Munir R, Semmar N, Farman M, Ahmad NS. An updated review on pharmacological activities and phytochemical constituents of evening primrose (genus Oenothera ). Asian Pac J Trop Biomed 2017. [DOI: 10.1016/j.apjtb.2017.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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17
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Tian R, Ding Y, Peng YY, Lu N. Inhibition of Myeloperoxidase- and Neutrophil-Mediated Hypochlorous Acid Formation in Vitro and Endothelial Cell Injury by (-)-Epigallocatechin Gallate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:3198-3203. [PMID: 28361543 DOI: 10.1021/acs.jafc.7b00631] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Myeloperoxidase (MPO) plays important roles in various diseases through its unique chlorinating activity to catalyze excess hypochlorous acid (HOCl) formation. Epidemiological studies indicate an inverse correlation between plant polyphenol consumption and the incidence of cardiovascular diseases. Here we showed that (-)-epigallocatechin gallate (EGCG), the main flavonoid present in green tea, dose-dependently inhibited MPO-mediated HOCl formation in vitro (chlorinating activities of MPO: 50.2 ± 5.7% for 20 μM EGCG versus 100 ± 5.6% for control, P < 0.01). UV-vis spectral and docking studies indicated that EGCG bound to the active site (heme) of MPO and resulted in the accumulation of compound II, which was unable to produce HOCl. This flavonoid also effectively inhibited HOCl generation in activated neutrophils (HOCl formation: 65.0 ± 5.6% for 20 μM EGCG versus 100 ± 6.2% for control, P < 0.01) without influencing MPO and Nox2 release and superoxide formation, suggesting that EGCG specifically inhibited MPO but not NADPH oxidase activity in activated neutrophils. Moreover, EGCG inhibited MPO (or neutrophil)-mediated HOCl formation in human umbilical vein endothelial cells (HUVEC) culture and accordingly protected HUVEC from MPO (or neutrophil)-induced injury (P < 0.05, all cases), although it did not induce cytotoxicity to HUVEC (P > 0.05, all cases). Our results indicate that dietary EGCG is an effective and specific inhibitor of MPO activity and may participate in the regulation of immune responses at inflammatory sites.
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Affiliation(s)
- Rong Tian
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Green Chemistry in Jiangxi Province, and College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, China
| | - Yun Ding
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Green Chemistry in Jiangxi Province, and College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, China
| | - Yi-Yuan Peng
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Green Chemistry in Jiangxi Province, and College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, China
| | - Naihao Lu
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Green Chemistry in Jiangxi Province, and College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, China
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Granica S, Kłębowska A, Kosiński M, Piwowarski JP, Dudek MK, Kaźmierski S, Kiss AK. Effects of Geum urbanum L. root extracts and its constituents on polymorphonuclear leucocytes functions. Significance in periodontal diseases. JOURNAL OF ETHNOPHARMACOLOGY 2016; 188:1-12. [PMID: 27139570 DOI: 10.1016/j.jep.2016.04.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 04/13/2016] [Accepted: 04/20/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Geum urbanum L. (wood avens) root infusions and decoctions have been used externally for reducing the bleeding and inflammation of gums (gingivitis), and mucous membranes. AIM OF THE STUDY Taking into account that primed and hyperactivated neutrophils are an important factor in the transition from gingivitis to periodontitis, we investigated the effects of phytochemically characterised (HPLC-DAD-MS(n)) extracts of different polarity from Geum urbanum root on oxidative burst, elastase, metalloproteinase 9 (MMP-9), interleukin 8 (IL-8) and 1β (IL-1β), tumour necrosis factor (TNF-α) release, expression of adhesion molecules (CD62L and CD11b) and delayed apoptosis in stimulated neutrophils. As gemin A is a dominating compound in a raw material, so we considered its activity in parallel with the positive control quercetin. MATERIALS AND METHODS The extracts were characterised by HPLC-DAD- MS(n) method. The inhibition of ROS production by stimulated neutrophils was determined using luminol dependent chemiluminescence method. The effect on MMP-9, IL-1β, TNF-α and IL-8 production by neutrophils was measured by enzyme-linked immunosorbent assay (ELISA). Neutrophil elastase release was established spectrophotometrically. The expression of adhesion molecules and the apoptosis of neutrophils was analyzed with flow cytometry. RESULTS The main compounds detected in the extract belong mainly to the group of ellagitannin: pedunculagin, stachyurin, casuarynin and gemin A, and ellagic acid derivatives. Procyanidins and one complex tannin were found as minor compounds. Gemin A significantly affected the functions of stimulated neutrophils by reducing the surface expression of CD11b, and inhibiting the release of reactive oxygen species, and proteases (elastase, MMP-9), chemokines and cytokines (interleukins IL-8, IL-1β). Interestingly, gemin A stimulated the release of TNF-α, which may be one of the stimulators of apoptosis of neutrophil cells. The primary aqueous extract, the ethyl acetate and the butanolic fractions, all containing the highest level of gemin A, have exerted similar but weaker activity. CONCLUSION The modulating effect on the neutrophils function of extracts, and its main constituent gemin A, support the traditional use of this plant material in cavity inflammation including mucositis, gingivitis and periodontosis.
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Affiliation(s)
- Sebastian Granica
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland
| | - Agnieszka Kłębowska
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland
| | - Michał Kosiński
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland
| | - Jakub P Piwowarski
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland
| | - Marta K Dudek
- Physical Chemistry Department, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland; Centre of Molecular and Macromolecular Studies PAS, Sienkiewicza 112, Lodz 90-363, Poland
| | - Sławomir Kaźmierski
- Centre of Molecular and Macromolecular Studies PAS, Sienkiewicza 112, Lodz 90-363, Poland
| | - Anna K Kiss
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
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A strategy for screening active lead compounds and functional compound combinations from herbal medicines based on pharmacophore filtering and knockout/knockin chromatography. J Chromatogr A 2016; 1456:176-86. [DOI: 10.1016/j.chroma.2016.06.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 11/19/2022]
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20
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Determination of in vitro antioxidant and UV-protecting activity of aqueous and ethanolic extracts from Galinsoga parviflora and Galinsoga quadriradiata herb. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 149:189-95. [DOI: 10.1016/j.jphotobiol.2015.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/21/2015] [Accepted: 06/13/2015] [Indexed: 11/20/2022]
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Dual stimulus-dependent effect of Oenothera paradoxa extract on the respiratory burst in human leukocytes: suppressing for Escherichia coli and phorbol myristate acetate and stimulating for formyl-methionyl-leucyl-phenylalanine. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:764367. [PMID: 25298860 PMCID: PMC4178919 DOI: 10.1155/2014/764367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 08/15/2014] [Indexed: 12/14/2022]
Abstract
Although a growing body of evidence suggests that plant polyphenols can modulate human immune responses, their simultaneous action on monocyte and neutrophil oxidative burst is currently poorly understood. Based on the hypothesis that various polyphenols contained in plant extracts might affect the oxidative burst of phagocytes, we evaluated the effects of ethanolic O. paradoxa extract polyphenols on monocyte and neutrophil oxidative burst in vitro activated by different stimuli, including opsonized bacteria E. coli, phorbol 12-myristate 13-acetate (PMA), and formyl-methionyl-leucyl-phenylalanine (fMLP). Samples were analyzed by the dihydrorhodamine flow cytometry assay. Our results showed that the extract repressed significantly and dose-dependently reactive oxygen species production in both cell types stimulated with E. coli and PMA (P < 0.05) and its inhibitory efficiency was stimulus- and cell-type-dependent. Interestingly, there was significant stimulatory effect of the extract on bursting phagocytes induced by fMLP (P < 0.05). Additionally, several flavonoids and phenolic compounds as well as penta-galloyl-β-(D)-glucose (PGG), the representative of hydrolyzable tannins, were identified in the 60% extract by high-performance liquid chromatography (HPLC) coupled to electrospray ionization in negative ion mode. In summary, the ethanolic O. paradoxa extract, rich in flavonoids and phenolic compounds, exhibits dual stimulus-dependent effect on the respiratory burst in human leukocytes; hence, it might affect immune responses in humans.
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Ratz-Łyko A, Arct J, Herman A, Pytkowska K, Majewski S. The effect of enzymatic hydrolysis on the biological properties ofOenothera biennis,Borago officinalisandNigella sativaseedcake by-products from oil pressing. Int J Food Sci Technol 2014. [DOI: 10.1111/ijfs.12475] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Ratz-Łyko
- Department of Cosmetics Chemistry; Academy of Cosmetics and Health Care; Podwale 13 00-252 Warsaw Poland
| | - Jacek Arct
- Department of Cosmetics Chemistry; Academy of Cosmetics and Health Care; Podwale 13 00-252 Warsaw Poland
| | - Anna Herman
- Department of Cosmetics Chemistry; Academy of Cosmetics and Health Care; Podwale 13 00-252 Warsaw Poland
| | - Katarzyna Pytkowska
- Department of Cosmetics Chemistry; Academy of Cosmetics and Health Care; Podwale 13 00-252 Warsaw Poland
| | - Sławomir Majewski
- Department of Dermatology and Venereology; Medical University of Warsaw; Koszykowa 82 A 02-008 Warsaw Poland
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Bazylko A, Piwowarski JP, Filipek A, Bonarewicz J, Tomczyk M. In vitro antioxidant and anti-inflammatory activities of extracts from Potentilla recta and its main ellagitannin, agrimoniin. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:222-227. [PMID: 23811215 DOI: 10.1016/j.jep.2013.06.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 06/06/2013] [Accepted: 06/12/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Potentilla recta is one of the numerous cinquefoil species growing in Poland. It is used in traditional medicine e.g. in the treatment of skin inflammation. AIM OF THE STUDY The purpose of the present study is to evaluate antioxidant and anti-inflammatory activities of extracts and subfractions of the P. recta herb (obtained by using solvents of different polarity) in in vitro systems as well as to examine their chemical composition. MATERIALS AND METHODS Antioxidant activities of the extracts, subfractions and agrimoniin were evaluated using DPPH and three other radicals (O2(-), H2O2, and HClO) generated in cell-free systems. Anti-hyaluronidase activity was measured by using the turbidimetric method. Inhibition of lipoxidase activity was measured spectrophotometrically, using linoleic acid as a substrate. The composition of the most active subfraction was determined using the HPLC-DAD-MS(n) method. RESULTS All tested samples showed scavenging activity against all the examined reactive species in a concentration-dependent manner. The highest scavenging activity against DPPH, H2O2 and HClO was observed in the ethyl acetate subfraction (PRE3) (SC50 ± SEM [μg/mL]: 25.39 ± 2.49, 1.79 ± 0.25 and 8.52 ± 1.16 respectively). It was only in the xanthine/xanthine oxidase system that the antioxidation potential of the diethyl ether subfraction (PRE2) (SC50 ± SEM [μg/mL]: 6.59 ± 1.33) was higher than that of the subfraction PRE3 (SC50 ± SEM [μg/mL]: 8.57 ± 1.37). Also, in the studies of lipoxidase and hyaluronidase inhibition activity the strongest effect was observed for PRE3, with IC50 [μg/mL] = 86.31 ± 5.46, and 12.99 ± 1.31, respectively. The chromatographic method (HPTLC-DPPH) revealed that the principal substance responsible for the activity, is a tannin like compound. Isolated agrimoniin showed significant reactive oxygen species scavenging activity and significant enzyme inhibition activity (including xanthine oxidase inhibition activity). Agrimoniin exerted the strongest scavenging activity against H2O2 (SC50 ± SEM [μM]: 0.20 ± 0.01). This compound also significantly inhibited the enzymatic activity of lipoxidase (IC50 [μM] = 36.47 ± 1.29), and, particularly, of hyaluronidase (IC50 [μM] = 2.65 ± 0.40). CONCLUSIONS The strong scavenging activity against H2O2, and the inhibition of the enzymatic activity of lipoxidase, and particularly, hyaluronidase observed for the tested subfractions and agrimoniin, partly explain the beneficial effects of P. recta in treatment of skin inflammation.
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Affiliation(s)
- Agnieszka Bazylko
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Warsaw Medical University, ul. Banacha 1, 02097 Warsaw, Poland.
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Jaszewska E, Soin M, Filipek A, Naruszewicz M. UVA-induced ROS generation inhibition by Oenothera paradoxa defatted seeds extract and subsequent cell death in human dermal fibroblasts. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 126:42-6. [PMID: 23892189 DOI: 10.1016/j.jphotobiol.2013.07.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 06/28/2013] [Accepted: 07/01/2013] [Indexed: 10/26/2022]
Abstract
UVA radiation stimulates the production of reactive oxygen species (ROS), which react with lipids, proteins and other intracellular molecules leading to oxidative stress, cellular damage and ultimately cell death. There is, therefore, a growing need for substances exhibiting antioxidant activity, which may support repair mechanisms of the skin. This study evaluates the protective effect of the aqueous Oenothera paradoxa Hudziok defatted seeds extract, rich in polyphenolic compounds, against UVA (25 and 50J/cm(2))-induced changes in normal human dermal fibroblasts (NHDFs). The tested extract (0.1-10μg/ml) has decreased, in a concentration-dependent fashion, the UVA-induced release of lactate dehydrogenase (LDH) into the culture medium, the ROS production (with the use of 2',7'-dichlorodihydrofluorescein diacetate) and lipid peroxidation (utilizing redox reactions with ferrous ions) as compared to the control cells (incubated without the extract). Moreover, the extract increased the number of viable (calcein positive) cells decreasing the number of cells in late apoptosis (annexin V-FITC and propidium iodide positive). Thus our results show that O. paradoxa defatted seeds extract may be beneficial for the prevention of UVA skin damage.
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Affiliation(s)
- Edyta Jaszewska
- Department of Pharmaceutical Care, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Poland
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Lewandowska U, Szewczyk K, Owczarek K, Hrabec Z, Podsędek A, Koziołkiewicz M, Hrabec E. Flavanols from evening primrose (Oenothera paradoxa) defatted seeds inhibit prostate cells invasiveness and cause changes in Bcl-2/Bax mRNA ratio. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:2987-2998. [PMID: 23451794 DOI: 10.1021/jf304269x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, we assessed the influence of an evening primrose flavanol preparation (EPFP) on proliferation and invasiveness of human prostate cancer cells (DU 145) and immortalized prostate epithelial cells (PNT1A). We report for the first time that EPFP reduces DU 145 cell proliferation (IC50 = 97 μM GAE for 72 h incubation) and invasiveness (by 24% versus control at 75 μM GAE). EPFP strongly inhibited PNT1A invasiveness in a concentration-dependent manner (by 67% versus control at 75 μM GAE) and did not cause a reduction in their proliferation. Furthermore, EPFP inhibited the activities of MMP-2 and MMP-9 secreted to culture medium by PNT1A cells by 84% and 34% versus control at 100 μM GAE, respectively. In the case of DU 145, MMP-9 activity at 100 μM GAE was reduced by 37% versus control. Moreover, the evening primrose seed flavanols suppressed the expression of selected genes (MMP-1, MMP-9, MMP-14, c-Fos, c-Jun, and VEGF) and also caused favorable changes in Bcl-2/Bax mRNA ratio which render DU 145 cells more sensitive to apoptosis-triggering agents. An additional confirmation of the proapoptotic activity of EPFP toward DU 145 was visualization of characteristic apoptotic bodies by DAPI staining. In conclusion, this study suggests that EPFP may increase apoptosis and reduce angiogenesis of prostate cancer cells.
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Affiliation(s)
- Urszula Lewandowska
- Department of Medical Enzymology, Medical University of Lodz , Mazowiecka 6/8, 92-215 Lodz, Poland.
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Granica S, Czerwińska ME, Piwowarski JP, Ziaja M, Kiss AK. Chemical composition, antioxidative and anti-inflammatory activity of extracts prepared from aerial parts of Oenothera biennis L. and Oenothera paradoxa Hudziok obtained after seeds cultivation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:801-810. [PMID: 23311638 DOI: 10.1021/jf304002h] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the present study we investigated the chemical composition of extracts prepared from aerial parts of Oenothera paradoxa Hudziok and Oenothera biennis L. and their antioxidative and anti-inflammatory activities. Ultra high pressure liquid chromatography (UHPLC)-DAD-MS/MS studies showed that both extracts contain a wide variety of polyphenols (39 identified constituents) among which macrocyclic ellagitannin turned out to be the main constituent. During the in vitro studies, using noncellular models, both extracts scavenged reactive oxygen species (ROS) in a concentration-dependent manner, and the lowest SC(50) values were obtained for O(2)(-) and H(2)O(2). Both extracts inhibited ROS production by stimulated human neutrophils. The stronger activity in the case of formyl-met-leu-phenylalanine stimulation suggests that both extracts may act through the receptor-dependent pathway. O. paradoxa extract and O. biennis extract exhibited anti-inflammatory activity by the inhibition of hyaluronidase and lipoxygenase in a concentration-dependent manner. The stronger activity of O.biennis extract toward lipoxygenase may be explained by its higher oenothein B content.
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Affiliation(s)
- Sebastian Granica
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Warsaw, Poland.
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Inhibition by polyphenolic phytochemicals and sulfurous compounds of the formation of 8-chloroguanosine mediated by hypochlorous acid, human myeloperoxidase, and activated human neutrophils. Biosci Biotechnol Biochem 2012; 76:2208-13. [PMID: 23221717 DOI: 10.1271/bbb.120482] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hypochlorous acid (HOCl) produced by myeloperoxidase (MPO) of activated neutrophils can react with nucleic acid bases to form chlorinated nucleosides such as 8-chloroguanosine (Cl-Guo). Chlorination is enhanced by nicotine. We investigated the effects of various natural antioxidants including polyphenolic phytochemicals on the formation of Cl-Guo by HOCl in the presence and the absence of nicotine. Polyphenols, including catechins, curcumin, resveratrol, silibinin, and sulfurous compound α-lipoic acid, were found to inhibit both HOCl- and human MPO-induced Cl-Guo formation dose-dependently. Among the test compounds, (-)-epigallocatechin gallate (EGCG) showed the strongest inhibitory effect. Cl-Guo formation, mediated by activated human neutrophils in the presence of nicotine, was inhibited by EGCG, silibinin, and α-lipoic acid. These results suggest that polyphenols and sulfurous compounds have the potential to inhibit the induction of nucleobase damage mediated by chlorination, with possible application to reducing DNA damage associated with inflammation and cigarette-smoke inhalation.
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Kiss AK, Filipek A, Żyżyńska‐Granica B, Naruszewicz M. Effects of Penta‐
O
‐galloyl‐β‐D‐glucose on Human Neutrophil Function: significant Down‐Regulation of L‐selectin Expression. Phytother Res 2012; 27:986-92. [DOI: 10.1002/ptr.4822] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/19/2012] [Accepted: 07/23/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Anna K. Kiss
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy Medical University of Warsaw Poland
| | - Agnieszka Filipek
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy Medical University of Warsaw Poland
| | - Barbara Żyżyńska‐Granica
- Department of General and Nutritional Biochemistry, Faculty of Health Sciences Medical University of Warsaw Poland
| | - Marek Naruszewicz
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy Medical University of Warsaw Poland
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Kiss AK, Naruszewicz M. Polyphenolic compounds characterization and reactive nitrogen species scavenging capacity of Oenothera paradoxa defatted seed extracts. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Kiss AK, Kapłon-Cieślicka A, Filipiak KJ, Opolski G, Naruszewicz M. Ex vivo effects of an Oenothera paradoxa extract on the reactive oxygen species generation and neutral endopeptidase activity in neutrophils from patients after acute myocardial infarction. Phytother Res 2011; 26:482-7. [PMID: 22488795 DOI: 10.1002/ptr.3585] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 05/05/2011] [Accepted: 05/11/2011] [Indexed: 12/31/2022]
Abstract
Oxidative stress induced by reactive oxygen species (ROS) is considered to play an important part in the aetiology of coronary heart disease. Apart from ROS, neutrophils are a source of neutral endopeptidase (NEP) that inactivates protective natriuretic peptides. The aim of the present study was to evaluate the in vitro ROS generation and inhibition of NEP activity in neutrophils obtained from healthy volunteers and from patients after acute myocardial infarction (AMI) by an aqueous extract of Oenothera paradoxa. Neutrophils isolated from AMI patients showed two-fold higher ROS generation compared with cells from healthy donors, especially in the lucigenin-enhanced luminescence model, which suggests intensive O₂⁻ generation. The addition of O. paradoxa extract at concentrations of 0.2, 2 and 20 µg/mL resulted in a significant reduction in ROS generation. The extracellular NEP activity was higher in patients after AMI compared with healthy individuals (15.0 ± 0.9 versus 10.3 ± 0.5 nmol AMC/10(6) cells/60 min; p = 0.001). The addition of O. paradoxa extract at concentrations of 20, 50 and 100 µg/mL resulted in a significant reduction in NEP activity in both groups. O. paradoxa extract appears to be an interesting candidate for supplementation in the prevention of cardiovascular diseases.
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Affiliation(s)
- Anna K Kiss
- Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097, Warsaw, Poland
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Dobreva MA, Frazier RA, Mueller-Harvey I, Clifton LA, Gea A, Green RJ. Binding of pentagalloyl glucose to two globular proteins occurs via multiple surface sites. Biomacromolecules 2011; 12:710-5. [PMID: 21250665 DOI: 10.1021/bm101341s] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction between pentagalloyl glucose (PGG) and two globular proteins, bovine serum albumin (BSA) and ribulose-1,5-bisphosphate carboxylase oxygenase (rubisco), was investigated by isothermal titration calorimetry (ITC). ITC data fit to a binding model consisting of two sets of multiple binding sites, which reveal similarities in the mode of binding of PGG to BSA and rubisco. In both cases, the interaction is characterized by a high number of binding sites, which suggests that binding occurs by a surface adsorption mechanism that leads to coating of the protein surface, which promotes aggregation and precipitation of the PGG-protein complex. This model was confirmed by turbidimetry analysis of the PGG-BSA interaction. Analysis of tryptophan fluorescence quenching during the interaction of PGG with BSA suggests that binding of PGG leads to some conformational changes that are energetically closer to the unfolded state of the BSA structure, because small red shifts in the resulting emission spectra were observed.
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Affiliation(s)
- Marina A Dobreva
- Chemistry and Biochemistry Laboratory, Animal Science Research Group, Department of Agriculture, University of Reading, P.O. Box 236, 1 Earley Gate, Reading, RG6 6AT, United Kingdom
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