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Thesis of Potentially Sweet Dihydrochalcone Glycosides
University of Bath PHD The synthesis of potentially sweet dihydrochalcone glycosides. Noble, Christopher Michael Award date: 1974 Awarding institution: University of Bath Link to publication Alternative formats If you require this document in an alternative format, please contact: [email protected] General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Download date: 05. Oct. 2021 THE SYNTHESIS OF POTBTTIALLY SWEET DIHYDROCHALCOITB GLYCOSIDES submitted by CHRISTOPHER MICHAEL NOBLE for the degree of Doctor of Philosophy of the University of Bath. 1974 COPYRIGHT Attention is drawn to the fact that copyright of this thesis rests with its author.This copy of the the sis has been supplied on condition that anyone who con sults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be pub lished without the prior written consent of the author. -
Dr. Duke's Phytochemical and Ethnobotanical Databases Chemicals Found in Glycyrrhiza Uralensis
Dr. Duke's Phytochemical and Ethnobotanical Databases Chemicals found in Glycyrrhiza uralensis Activities Count Chemical Plant Part Low PPM High PPM StdDev Refernce Citation 0 1-METHOXY-FICIFOLINOL Root 3.4 -- 0 18-ALPHA- Root -- GLYCYRRHETINIC-ACID 0 18-ALPHA-GLYCYRRHIZIN Root 200.0 -- 0 18-ALPHA-HYDROXY- Rhizome -- GLYCYRRHETATE 0 18-BETA- Root -- GLYCYRRHETINIC-ACID 0 2',4',5-TRIHYDROXY-7- Root -- METHOXY-8-ALPHA- ALPHA-DIMETHYL-ALLYL-3- ARYLCOUMARIN 0 2',4',7-TRIHYDROXY-3'- Root -- GAMMA-GAMMA- DIMETHYL-ALLYL-3- ARYLCOUMARIN 0 2,3-DIHYDRO- Root -- ISOLIQUIRITIGENIN 0 2-METHYL-7- Root Chemical Constituents of HYDROXYISOFLAVONE Oriental Herbs (3 diff. books) 0 22-BETA-ACETYL- Root -- GLABRIC-ACID 0 24-HYDROXYGLABROLIDE Root -- 0 24- Root -- HYDROXYGLYCYRRHETIC- ACID-METHYL-ESTER 0 28- Root Chemical Constituents of HYDROXYGLYCYRRHETIC- Oriental Herbs (3 diff. books) ACID 0 3-ACETYL- Root -- GLYCYRRHETIC-ACID 0 3-BETA-24-DIHYDROXY- Root -- OLEAN-11,13(18)-DIEN-30- OIC-ACID-METHYL-ESTER 0 3-BETA- Root -- FORMYLGLABROLIDE 0 3-O-METHYLGLYCYROL Root -- 0 3-OXO-GLYCYRRHETIC- Root -- ACID 0 4',7-DIHYDROXYFLAVONE Root 240.0 -- 0 4'-O-(BETA-D-APIO-D- Root 120000.0 -- FURANOSYL-(1,2)-BETA-D- GLUCOPYRANOSYL)- LIQUIRITIGENIN Activities Count Chemical Plant Part Low PPM High PPM StdDev Refernce Citation 0 5-O-METHYLGLYCYROL Root -- 0 6''-O-ACETYL-LIQUIRITIN Root -- 0 8-C-PRENYL-ERIODICTYOL Root 13.0 -- 0 APIGENIN-6,8-DI-C- Root -- GLUCOSIDE 1 APIOGLYCYRRHIZIN Root 100.0 -1.0 -- 0 APIOISOLIQUIRITIN Root -- 0 APIOLIQUIRITIN Root -- 1 ARABOGLYCYRRHIZIN Root 600.0 1.0 -- 2 ARSENIC Root 0.3 -0.19476716146558964 Chen, H.C. -
Flavonoid Glucodiversification with Engineered Sucrose-Active Enzymes Yannick Malbert
Flavonoid glucodiversification with engineered sucrose-active enzymes Yannick Malbert To cite this version: Yannick Malbert. Flavonoid glucodiversification with engineered sucrose-active enzymes. Biotechnol- ogy. INSA de Toulouse, 2014. English. NNT : 2014ISAT0038. tel-01219406 HAL Id: tel-01219406 https://tel.archives-ouvertes.fr/tel-01219406 Submitted on 22 Oct 2015 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Last name: MALBERT First name: Yannick Title: Flavonoid glucodiversification with engineered sucrose-active enzymes Speciality: Ecological, Veterinary, Agronomic Sciences and Bioengineering, Field: Enzymatic and microbial engineering. Year: 2014 Number of pages: 257 Flavonoid glycosides are natural plant secondary metabolites exhibiting many physicochemical and biological properties. Glycosylation usually improves flavonoid solubility but access to flavonoid glycosides is limited by their low production levels in plants. In this thesis work, the focus was placed on the development of new glucodiversification routes of natural flavonoids by taking advantage of protein engineering. Two biochemically and structurally characterized recombinant transglucosylases, the amylosucrase from Neisseria polysaccharea and the α-(1→2) branching sucrase, a truncated form of the dextransucrase from L. Mesenteroides NRRL B-1299, were selected to attempt glucosylation of different flavonoids, synthesize new α-glucoside derivatives with original patterns of glucosylation and hopefully improved their water-solubility. -
Identification of Key Transporters Mediating Uptake of Aconitum
RSC Advances View Article Online PAPER View Journal | View Issue Identification of key transporters mediating uptake of aconitum alkaloids into the liver and kidneys and Cite this: RSC Adv.,2019,9,16136 the potential mechanism of detoxification by active ingredients of liquorice Yufei He, †a Ze Wang,†b Weidang Wu,c Ying Xie,d Zihong Wei,c Xiulin Yi,c Yong Zeng,c Yazhuo Li *c and Changxiao Liu*ac Aconite as a commonly used herb has been extensively applied in the treatment of rheumatoid arthritis, as pain relief, as well as for its cardiotonic actions. Aconitum alkaloids have been shown to be the most potent ingredients in aconite, in terms of efficacy against disease, but they are also highly toxic. Apart from neurological and cardiovascular toxicity exposed, the damage to hepatocytes and nephrocytes with long-term use of aconitum alkaloids should also be carefully considered. This study attempted to investigate the critical role of uptake transporters mediating the transport of aconitum alkaloids into the Creative Commons Attribution-NonCommercial 3.0 Unported Licence. liver and the kidneys. The resulting data revealed that hOATP1B1, 1B3, hOCT1 and hOAT3 were mainly involved in the uptake of aconitum alkaloids. Additionally, the inhibitory effects of bioactive ingredients of liquorice on uptake transporters were screened and further confirmed by determining the IC50 values. The in vitro study suggested that liquorice might lower the toxicity of aconite by reducing its exposure in the liver and/or kidneys through inhibition of uptake transporters. Eventually, the in vivo study was indicative of detoxification of liquorice by decreasing the exposure of aconitine as representative compound in liver after co-administration, even though the exposure in kidney altered was less Received 16th January 2019 significant. -
Insecticidal and Antifungal Chemicals Produced by Plants
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Archive Ouverte en Sciences de l'Information et de la Communication Insecticidal and antifungal chemicals produced by plants: a review Isabelle Boulogne, Philippe Petit, Harry Ozier-Lafontaine, Lucienne Desfontaines, Gladys Loranger-Merciris To cite this version: Isabelle Boulogne, Philippe Petit, Harry Ozier-Lafontaine, Lucienne Desfontaines, Gladys Loranger- Merciris. Insecticidal and antifungal chemicals produced by plants: a review. Environmental Chem- istry Letters, Springer Verlag, 2012, 10 (4), pp.325 - 347. 10.1007/s10311-012-0359-1. hal-01767269 HAL Id: hal-01767269 https://hal-normandie-univ.archives-ouvertes.fr/hal-01767269 Submitted on 29 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - NonCommercial| 4.0 International License Version définitive du manuscrit publié dans / Final version of the manuscript published in : Environmental Chemistry Letters, 2012, n°10(4), 325-347 The final publication is available at www.springerlink.com : http://dx.doi.org/10.1007/s10311-012-0359-1 Insecticidal and antifungal chemicals produced by plants. A review Isabelle Boulogne 1,2* , Philippe Petit 3, Harry Ozier-Lafontaine 2, Lucienne Desfontaines 2, Gladys Loranger-Merciris 1,2 1 Université des Antilles et de la Guyane, UFR Sciences exactes et naturelles, Campus de Fouillole, F- 97157, Pointe-à-Pitre Cedex (Guadeloupe), France. -
GRAS Notice (GRN) No.901, Glucosyl Hesperidin
GRAS Notice (GRN) No. 901 https://www.fda.gov/food/generally-recognized-safe-gras/gras-notice-inventory ~~~lECTV!~ITJ) DEC 1 2 20,9 OFFICE OF FOOD ADDITI\/c SAFETY tnC Vanguard Regulator~ Services, Inc 1311 Iris Circle Broomfield, CO, 80020, USA Office: + 1-303--464-8636 Mobile: +1-720-989-4590 Email: [email protected] December 15, 2019 Dennis M. Keefe, PhD, Director, Office of Food Additive Safety HFS-200 Food and Drug Administration 5100 Paint Branch Pkwy College Park, MD 20740-3835 Re: GRAS Notice for Glucosyl Hesperidin Dear Dr. Keefe: The attached GRAS Notification is submitted on behalf of the Notifier, Hayashibara Co., ltd. of Okayama, Japan, for Glucosyl Hesperidin (GH). GH is a hesperidin molecule modified by enzymatic addition of a glucose molecule. It is intended for use as a general food ingredient, in food. The document provides a review of the information related to the intended uses, manufacturing and safety of GH. Hayashibara Co., ltd. (Hayashibara) has concluded that GH is generally recognized as safe (GRAS) based on scientific procedures under 21 CFR 170.30(b) and conforms to the proposed rule published in the Federal Register at Vol. 62, No. 74 on April 17, 1997. The publically available data and information upon which a conclusion of GRAS was made has been evaluated by a panel of experts who are qualified by scientific training and experience to assess the safety of GH under the conditions of its intended use in food. A copy of the Expert Panel's letter is attached to this GRAS Notice. -
Antioxidant and Anti-Inflammatory Activity of Citrus Flavanones Mix
antioxidants Article Antioxidant and Anti-Inflammatory Activity of Citrus Flavanones Mix and Its Stability after In Vitro Simulated Digestion Marcella Denaro †, Antonella Smeriglio *,† and Domenico Trombetta Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci, 98168 Messina, Italy; [email protected] (M.D.); [email protected] (D.T.) * Correspondence: [email protected]; Tel.: +39-090-676-4039 † Both authors contributed equally. Abstract: Recently, several studies have highlighted the role of Citrus flavanones in counteracting oxidative stress and inflammatory response in bowel diseases. The aim of study was to identify the most promising Citrus flavanones by a preliminary antioxidant and anti-inflammatory screening by in vitro cell-free assays, and then to mix the most powerful ones in equimolar ratio in order to investigate a potential synergistic activity. The obtained flavanones mix (FM) was then subjected to in vitro simulated digestion to evaluate the availability of the parent compounds at the intestinal level. Finally, the anti-inflammatory activity was investigated on a Caco-2 cell-based model stimulated with interleukin (IL)-1β. FM showed stronger antioxidant and anti-inflammatory activity with respect to the single flavanones, demonstrating the occurrence of synergistic activity. The LC-DAD-ESI- MS/MS analysis of gastric and duodenal digested FM (DFM) showed that all compounds remained unchanged at the end of digestion. As proof, a superimposable behavior was observed between FM and DFM in the anti-inflammatory assay carried out on Caco-2 cells. Indeed, it was observed that both FM and DFM decreased the IL-6, IL-8, and nitric oxide (NO) release similarly to the reference Citation: Denaro, M.; Smeriglio, A.; anti-inflammatory drug dexamethasone. -
Enhanced Protection of Biological Membranes During Lipid Peroxidation
International Journal of Molecular Sciences Article Enhanced Protection of Biological Membranes during Lipid Peroxidation: Study of the Interactions between Flavonoid Loaded Mesoporous Silica Nanoparticles and Model Cell Membranes Lucija Mandi´c 1, Anja Sadžak 1 , Vida Strasser 1, Goran Baranovi´c 2, Darija Domazet Jurašin 1 , Maja Dutour Sikiri´c 1 and Suzana Šegota 1,* 1 Ruđer Boškovi´cInstitute, Division of Physical Chemistry, 10000 Zagreb, Croatia; [email protected] (L.M.); [email protected] (A.S.); [email protected] (V.S.); [email protected] (D.D.J.); [email protected] (M.D.S.) 2 Ruđer Boškovi´cInstitute, Division of Organic Chemistry and Biochemistry, 10000 Zagreb, Croatia; [email protected] * Correspondence: [email protected]; Tel.: +385-1-456-1185 Received: 14 April 2019; Accepted: 30 May 2019; Published: 1 June 2019 Abstract: Flavonoids, polyphenols with anti-oxidative activity have high potential as novel therapeutics for neurodegenerative disease, but their applicability is rendered by their poor water solubility and chemical instability under physiological conditions. In this study, this is overcome by delivering flavonoids to model cell membranes (unsaturated DOPC) using prepared and characterized biodegradable mesoporous silica nanoparticles, MSNs. Quercetin, myricetin and myricitrin have been investigated in order to determine the relationship between flavonoid structure and protective activity towards oxidative stress, i.e., lipid peroxidation induced by the addition of hydrogen peroxide and/or Cu2+ ions. Among investigated flavonoids, quercetin showed the most enhanced and prolonged protective anti-oxidative activity. The nanomechanical (Young modulus) measurement of the MSNs treated DOPC membranes during lipid peroxidation confirmed attenuated membrane damage. -
Increasing Hesperetin Bioavailability by Modulating Intestinal Metabolism and Transport
Walter Brand Walter Increasing hesperetin bioavailabiliy by modulating intestinal metabolism and transport and metabolism intestinal by modulating bioavailabiliy hesperetin Increasing Increasing hesperetin bioavailability by modulating intestinal metabolism and transport Walter Brand Boekomslag Walter.indd 1 15-4-2010 8:51:54 Increasing hesperetin bioavailability by modulating intestinal metabolism and transport Walter Brand Thesis committee Thesis supervisors Prof. dr. ir. Ivonne M.C.M. Rietjens Professor of Toxicology Wageningen University Prof. dr. Gary Williamson Professor of Functional Food University of Leeds, UK Prof. dr. Peter J. van Bladeren Professor of Toxico-kinetics and Biotransformation Wageningen University Other members Prof. dr. Martin van den Berg, Institute for Risk Assessment Sciences, Utrecht Dr. Peter C.H. Hollman, RIKILT, Wageningen Prof. dr. Frans G.M. Russel, Radboud University Nijmegen Prof. dr. Renger F. Witkamp, Wageningen University This research was conducted under the auspices of the Graduate School VLAG Increasing hesperetin bioavailability by modulating intestinal metabolism and transport Walter Brand Thesis submitted in fulfilment of the requirements for the degree of doctor at Wageningen University by the authority of Rector Magnificus Prof. dr. M.J. Kroppf, in the presence of the Thesis Committee appointed by the Academic Board to be defended in public on Friday 28 May 2010 at 4 p.m. in the Aula Title: Increasing hesperetin bioavailability by modulating intestinal metabolism and transport 168 pages -
Simultaneous Determination and Pharmacokinetic Characterization
molecules Article Simultaneous Determination and Pharmacokinetic Characterization of Glycyrrhizin, Isoliquiritigenin, Liquiritigenin, and Liquiritin in Rat Plasma Following Oral Administration of Glycyrrhizae Radix Extract You Jin Han 1, Bitna Kang 2, Eun-Ju Yang 1, Min-Koo Choi 2,* and Im-Sook Song 1,* 1 College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Korea; [email protected] (Y.J.H.); [email protected] (E.-J.Y.) 2 College of Pharmacy, Dankook University, Cheon-an 31116, Korea; [email protected] * Correspondence: [email protected] (I.-S.S.); [email protected] (M.-K.C.); Tel.: +82-53-950-8575 (I.-S.S.); +82-41-550-1432 (M.-K.C.) Academic Editors: In-Soo Yoon and Hyun-Jong Cho Received: 12 April 2019; Accepted: 9 May 2019; Published: 10 May 2019 Abstract: Glycyrrhizae Radix is widely used as herbal medicine and is effective against inflammation, various cancers, and digestive disorders. We aimed to develop a sensitive and simultaneous analytical method for detecting glycyrrhizin, isoliquiritigenin, liquiritigenin, and liquiritin, the four marker components of Glycyrrhizae Radix extract (GRE), in rat plasma using liquid chromatography-tandem mass spectrometry and to apply this analytical method to pharmacokinetic studies. Retention times for glycyrrhizin, isoliquiritigenin, liquiritigenin, and liquiritin were 7.8 min, 4.1 min, 3.1 min, and 2.0 min, respectively, suggesting that the four analytes were well separated without any interfering peaks around the peak elution time. The lower limit of quantitation was 2 ng/mL for glycyrrhizin and 0.2 ng/mL for isoliquiritigenin, liquiritigenin, and liquiritin; the inter- and intra-day accuracy, precision, and stability were less than 15%. -
Assembly of a Novel Biosynthetic Pathway for Production of the Plant Flavonoid Fisetin in Escherichia Coli
Downloaded from orbit.dtu.dk on: Oct 06, 2021 Assembly of a novel biosynthetic pathway for production of the plant flavonoid fisetin in Escherichia coli Stahlhut, Steen Gustav; Siedler, Solvej; Malla, Sailesh; Harrison, Scott James; Maury, Jerome; Neves, Ana Rute; Förster, Jochen Published in: Metabolic Engineering Link to article, DOI: 10.1016/j.ymben.2015.07.002 Publication date: 2015 Document Version Publisher's PDF, also known as Version of record Link back to DTU Orbit Citation (APA): Stahlhut, S. G., Siedler, S., Malla, S., Harrison, S. J., Maury, J., Neves, A. R., & Förster, J. (2015). Assembly of a novel biosynthetic pathway for production of the plant flavonoid fisetin in Escherichia coli. Metabolic Engineering, 31, 84-93. https://doi.org/10.1016/j.ymben.2015.07.002 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Metabolic Engineering 31 (2015) 84–93 Contents lists available at ScienceDirect Metabolic Engineering journal homepage: www.elsevier.com/locate/ymben Assembly of a novel biosynthetic pathway for production of the plant flavonoid fisetin in Escherichia coli Steen G. -
Identification and Validation of Metabolic Markers for Adulteration
H OH metabolites OH Article Identification and Validation of Metabolic Markers for Adulteration Detection of Edible Oils Using Metabolic Networks Xinjing Dou 1,2, Liangxiao Zhang 1,3,4,* , Xiao Wang 1,2, Ruinan Yang 1,2, Xuefang Wang 1,4, Fei Ma 1,3, Li Yu 1,4, Jin Mao 1,5 , Hui Li 1,5, Xiupin Wang 1,4 and Peiwu Li 1,3,4,5 1 Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; [email protected] (X.D.); [email protected] (X.W.); [email protected] (R.Y.); [email protected] (X.W.); [email protected] (F.M.); [email protected] (L.Y.); [email protected] (J.M.); [email protected] (H.L.); [email protected] (X.W.); [email protected] (P.L.) 2 Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China 3 Laboratory of Quality and Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture and Rural Affairs, Wuhan 430062, China 4 Quality Inspection and Test Center for Oilseed Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China 5 Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China * Correspondence: [email protected] Received: 19 January 2020; Accepted: 28 February 2020; Published: 29 February 2020 Abstract: Food adulteration is a challenge faced by consumers and researchers. Due to DNA fragmentation during oil processing, it is necessary to discover metabolic markers alternative to DNA for adulteration detection of edible oils. However, the contents of metabolic markers vary in response to various factors, such as plant species, varieties, geographical origin, climate, and cultivation measures.