Phytochemicals in Plant Cell Cultures Editorial Advisory Board
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Western Red Cedar Report
Forintek Canada Corp. Western Division 2665 East Mall Vancouver, BC V6T 1W5 Maximizing Natural Durability of Western Red-cedar: Beyond Thujaplicins by Jean Clark Bob Daniels Paul Morris Mycological Technologist Wood Chemistry Analyst Group Leader Durability and Protection Durability and Protection Durability and Protection Prepared for March 2004 Recipient Agreement Number: R04-013 Research Program Date: March 2004 C. R. Daniels Janet Ingram Jean Cook Acting Project Leader Reviewed Department Manager Maximizing Natural Durability of Western Red-cedar: Beyond Thujaplicins Confidential Summary Western red-cedar (WRC, Thuja plicata Donn ex D. Don) wood was extracted sequentially with six solvents using two extraction methods. The extracts were prepared for subsequent bioassay and analysed by high performance liquid chromatography for known bioactive compound concentrations. To focus identification of the extractives on those with bioactive properties, it was necessary to develop a micro-bioassay that would allow the biological activity of the unknown compounds present to be determined using minute quantities of each extracted constituent. The initial proposed technique utilised the loss of birefringence that occurs when decay fungi disrupt the crystalline cellulose structure as wood decays. Microtome sections of perishable sapwood were treated with microgram amounts of T. plicata heartwood compounds prior to exposure to decay fungi. The efficacy of the applied extract was then to be measured relative to the birefringence loss in untreated pine sapwood. Validation of the technique required standardisation of a number of variables. Over 600 thin sections of ponderosa pine sapwood were cut and exposed to three different fungi, plus non-infected controls, under varying conditions of section thickness and orientation, media and growth conditions, viz, on grids or sterile microscope slides, with and without cover-slips, and with and without supplemental nitrogen, for six different incubation periods. -
Glycosides Pharmacognosy Dr
GLYCOSIDES PHARMACOGNOSY DR. KIBOI Glycosides Glycosides • Glycosides consist of a sugar residue covalently bound to a different structure called the aglycone • The sugar residue is in its cyclic form and the point of attachment is the hydroxyl group of the hemiacetal function. The sugar moiety can be joined to the aglycone in various ways: 1.Oxygen (O-glycoside) 2.Sulphur (S-glycoside) 3.Nitrogen (N-glycoside) 4.Carbon ( Cglycoside) • α-Glycosides and β-glycosides are distinguished by the configuration of the hemiacetal hydroxyl group. • The majority of naturally-occurring glycosides are β-glycosides. • O-Glycosides can easily be cleaved into sugar and aglycone by hydrolysis with acids or enzymes. • Almost all plants that contain glycosides also contain enzymes that bring about their hydrolysis (glycosidases ). • Glycosides are usually soluble in water and in polar organic solvents, whereas aglycones are normally insoluble or only slightly soluble in water. • It is often very difficult to isolate intact glycosides because of their polar character. • Many important drugs are glycosides and their pharmacological effects are largely determined by the structure of the aglycone. • The term 'glycoside' is a very general one which embraces all the many and varied combinations of sugars and aglycones. • More precise terms are available to describe particular classes. Some of these terms refer to: 1.the sugar part of the molecule (e.g. glucoside ). 2.the aglycone (e.g. anthraquinone). 3.the physical or pharmacological property (e.g. saponin “soap-like ”, cardiac “having an action on the heart ”). • Modern system of naming glycosides uses the termination '-oside' (e.g. sennoside). • Although glycosides form a natural group in that they all contain a sugar unit, the aglycones are of such varied nature and complexity that glycosides vary very much in their physical and chemical properties and in their pharmacological action. -
Chemistry, Spectroscopic Characteristics and Biological Activity of Natural Occurring Cardiac Glycosides
IOSR Journal of Biotechnology and Biochemistry (IOSR-JBB) ISSN: 2455-264X, Volume 2, Issue 6 Part: II (Sep. – Oct. 2016), PP 20-35 www.iosrjournals.org Chemistry, spectroscopic characteristics and biological activity of natural occurring cardiac glycosides Marzough Aziz DagerAlbalawi1* 1 Department of Chemistry, University college- Alwajh, University of Tabuk, Saudi Arabia Abstract:Cardiac glycosides are organic compounds containing two types namely Cardenolide and Bufadienolide. Cardiac glycosides are found in a diverse group of plants including Digitalis purpurea and Digitalis lanata (foxgloves), Nerium oleander (oleander),Thevetiaperuviana (yellow oleander), Convallariamajalis (lily of the valley), Urgineamaritima and Urgineaindica (squill), Strophanthusgratus (ouabain),Apocynumcannabinum (dogbane), and Cheiranthuscheiri (wallflower). In addition, the venom gland of cane toad (Bufomarinus) contains large quantities of a purported aphrodisiac substance that has resulted in cardiac glycoside poisoning.Therapeutic use of herbal cardiac glycosides continues to be a source of toxicity today. Recently, D.lanata was mistakenly substituted for plantain in herbal products marketed to cleanse the bowel; human toxicity resulted. Cardiac glycosides have been also found in Asian herbal products and have been a source of human toxicity.The most important use of Cardiac glycosides is its affects in treatment of cardiac failure and anticancer agent for several types of cancer. The therapeutic benefits of digitalis were first described by William Withering in 1785. Initially, digitalis was used to treat dropsy, which is an old term for edema. Subsequent investigations found that digitalis was most useful for edema that was caused by a weakened heart. Digitalis compounds have historically been used in the treatment of chronic heart failure owing to their cardiotonic effect. -
Plant Terpenes – Hongjie Zhang, Minghua Qiu, Yegao Chen, Jinxiong Chen, Yun Sun, Cuifang Wang, Harry H.S
PHYTOCHEMISTRY AND PHARMACOGNOSY – Plant Terpenes – Hongjie Zhang, Minghua Qiu, Yegao Chen, Jinxiong Chen, Yun Sun, Cuifang Wang, Harry H.S. Fong PLANT TERPENES Hongjie Zhang Program for Collaborative Research in the Pharmaceutical Sciences, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, the University of Illinois at Chicago, Illinois 60612, USA Minghua Qiu State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 P. R. China Yegao Chen Department of Chemistry, Yunnan Normal University, Kunming 650092, P. R. China Jinxiong Chen, State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 P. R. China Yun Sun State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 P. R. China Cuifang Wang State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 P. R. China Harry H.S. Fong Program for Collaborative Research in the Pharmaceutical Sciences, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, the University of Illinois at Chicago, Illinois 60612, USA Keywords: Terpenes, Plants, Secondary Metabolites, Biological Activities, Biosynthetic Pathway. Contents 1. IntroductionUNESCO – EOLSS 2. Hemiterpenes 3. MonoterpenesSAMPLE CHAPTERS 4. Sesquiterpenes 5. Diterpenes 6. Sesterterpenes 7. Triterpenes 8. Polyterpenes 9. Conclusions Glossary Bibliography Biographical Sketch ©Encyclopedia of Life Support Systems (EOLSS) PHYTOCHEMISTRY AND PHARMACOGNOSY – Plant Terpenes – Hongjie Zhang, Minghua Qiu, Yegao Chen, Jinxiong Chen, Yun Sun, Cuifang Wang, Harry H.S. Fong Summary Terpenoids are hydrocarbon natural products based on five-carbon (isoprene) units as their building blocks, numbering more than 30,000 molecules having been discovered to-date. -
Effect of Thujaplicins on the Promoter Activities of the Human SIRT1 And
A tica nal eu yt c ic a a m A r a c t Uchiumi et al., Pharmaceut Anal Acta 2012, 3:5 h a P DOI: 10.4172/2153-2435.1000159 ISSN: 2153-2435 Pharmaceutica Analytica Acta Research Article Open Access Effects of Thujaplicins on the Promoter Activities of the Human SIRT1 and Telomere Maintenance Factor Encoding Genes Fumiaki Uchiumi1,2, Haruki Tachibana3, Hideaki Abe4, Atsushi Yoshimori5, Takanori Kamiya4, Makoto Fujikawa3, Steven Larsen2, Asuka Honma4, Shigeo Ebizuka4 and Sei-ichi Tanuma2,3,6,7* 1Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan 2Research Center for RNA Science, RIST, Tokyo University of Science, Noda-shi, Chiba-ken, Japan 3Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan 4Hinoki Shinyaku Co., Ltd, 9-6 Nibancho, Chiyoda-ku, Tokyo 102-0084, Japan 5Institute for Theoretical Medicine, Inc., 4259-3 Nagatsuda-cho, Midori-ku, Yokohama 226-8510, Japan 6Genome and Drug Research Center, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan 7Drug Creation Frontier Research Center, RIST, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan Abstract Resveratrol (Rsv) has been shown to extend the lifespan of diverse range of species to activate sirtuin (SIRT) family proteins, which belong to the class III NAD+ dependent histone de-acetylases (HDACs).The protein de- acetylating enzyme SIRT1 has been implicated in the regulation of cellular senescence and aging processes in mammalian cells. However, higher concentrations of this natural compound cause cell death. -
A Phytochemical Investigation of Two South African Plants: Strophanthus Speciosus and Eucomis Montana
UNIVERSITY OF KWAZULU-NATAL A PHYTOCHEMICAL INVESTIGATION OF TWO SOUTH AFRICAN PLANTS WITH THE SCREENING OF EXTRACTIVES FOR BIOLOGICAL ACTIVITY By ANDREW BRUCE GALLAGHER B. Sc Honours (cum laude) (UKZN) Submitted in fulfilment of the requirements for the degree of Master of Science In the School of Biological and Conservation Science and The School of Chemistry University of KwaZulu-Natal, Howard College campus Durban South Africa 2006 ABSTRACT Two South African medicinal plants, Strophanthus speciosus and Eucomis montana, were investigated phytochemically. From Strophanthus speciosus a cardenolide, neritaloside, was isolated, whilst Eucomis montana yielded three homoisoflavanones, 3,9- dihydroeucomin, 4' -demethyl-3,9-dihydroeucomin, and 4' -demethyl-5-0-methyl-3,9- dihydroeucomin. The structures were elucidated on the basis of spectroscopic data. The homoisoflavanones were screened for anti-inflammatory activity usmg a chemiluminescent luminol assay, modified for microplate usage. All of the homoisoflavanones exhibited good inhibition of chemiluminescence, with ICso values for 3,9-dihydroeucomin, 4' -demethyl-3,9-dihydroeucomin, and 4' -demethyl-5-0-methyl-3,9- dihydroeucomin being 14mg/mL, 7 mg/mL, and 13mg/mL respectively. The ICso value of 4'-demethyl-3,9-dihydroeucomin compared favourably with the NSAID control (meloxicam), which had an ICso of 6mg/mL. Neritaloside was not screened for biological activity as the yield of 14.4mg was insufficient for the muscle-relaxant screen for which it was intended. An assay for antioxidant/free radical scavenging activity was also performed. All the compounds had excellent antioxidant/free radical scavenging activity, with percentage inhibition of the reaction being 92%, 96%, and 94% for 3,9-dihydroeucomin, 4' demethyl-3,9-dihydroeucomin, and 4'-demethyl-5-0-methyl-3,9-dihydroeucomin respectively at a concentration of 10mg/mL. -
TERPENES : Structural Classification and Biological Activities
IOSR Journal Of Pharmacy And Biological Sciences (IOSR-JPBS) e-ISSN:2278-3008, p-ISSN:2319-7676. Volume 16, Issue 3 Ser. I (May – June 2021), PP 25-40 www.Iosrjournals.Org TERPENES : structural classification and biological activities Florence Déclaire Mabou1*, Irma Belinda Nzeuwa Yossa2 1Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 96 Dschang, Cameroon 2Department of Pharmaceutical Sciences, Faculty of Medicine and Pharmaceutical Sciences, University of Dschang, P.O. Box 96 Dschang, Cameroon Corresponding author : (F.D. Mabou) Abstract Terpenes is a large group of compounds found in flowers, stems, leaves, roots and other parts of numerous plant species. They are built up from isoprene units with the general formula (C5H8)n. They can be grouped into classes according to the number of isoprene units (n) in the molecule: hemiterpenes (C5H8), monoterpenes (C10H16), sesquiterpenes (C15H24), diterpenes (C20H32), triterpenes (C30H48), tetraterpenes (C40H64), and polyterpenes (C5H8)n. Most of the terpenoids with the variation in their structures are biologically active and are used worldwide for the treatment of many diseases. Many terpenoids inhibited different human cancer cells and are used as anticancer drugs such as Taxol and its derivatives. Many flavorings and nice fragrances are consisting on terpenes because of its nice aroma. Terpenes and its derivatives are used as antimalarial drugs such as artemisinin and related compounds. Meanwhile, terpenoids play a diverse role in the field of foods, drugs, cosmetics, hormones, vitamins, and so on. This chapterprovides classification, biological activities and distribution of terpenes isolated currently from different natural sources. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 04-05-2021 Date of Acceptance: 17-05-2021 --------------------------------------------------------------------------------------------------------------------------------------- I. -
FORINTEK CANADA CORP, Western Region 6620 N.W, Marine Drive Vancouver, B.C
FORINTEK CANADA CORP, Western Region 6620 N.W, Marine Drive Vancouver, B.C. V6T 1X2 RADIAL DISTRIBUTION OF THUJAPLICINS AND THUJIC ACID IN OLD-GROWTH AND SECOND-GROWTH WESTERN RED CEDAR (THUJA PLICATA DONN) by J.R, Nault July 1986 Project No, 04-55-43-010 J,R. Nault R.M, Kellogg Research Scientist Manager Wood Science Department Wood Science Department NOTICE This report is an internal Forintek document, for release only by permission of Forintek Canada Corp. This distribution does not constitute publication. The report is not to be copied for, or circulated to, persons or parties other than those agreed to by Forintek. Also, this report is not to be cited, in whole or in part, unless prior permission is secured from Forintek Canada Corp. Neither Forintek Canada Corp., nor its members, nor any other persons acting on its behalf, make any warranty, express or implied, or assume any legal responsibility or liability for the completeness of any information, apparatus, product or process disclosed, or represent that the use of the disclosed information would not infringe upon privately owned rights. Any reference in this report to any specific commercial product, process or service by tradename, trademark, manufacturer or otherwise does not necessarily constitute or imply its endorsement by Forintek Canada Corp. or any of its members. SUMMARY A capillary column gas chromatographic method for analyzing thujaplicins and related chemicals in extractive mixtures of Thuja plicata Donn was developed. The method involved derivatization of the extracts with diazomethane to form a complex mixture of methyl ethers and methyl esters. -
Cardenolide Biosynthesis in Foxglove1
Review 491 Cardenolide Biosynthesis in Foxglove1 W. Kreis2,k A. Hensel2, and U. Stuhlemmer2 1 Dedicated to Prof. Dr. Dieter He@ on the occasion of his 65th birthday 2 Friedrich-Alexander-Universität Erlangen, Institut für Botanik und Pharmazeutische Biologie, Erlangen, Germany Received: January 28, 1998; Accepted: March 28, 1998 Abstract: The article reviews the state of knowledge on the genuine cardiac glycosides present in Digitalis species have a biosynthesis of cardenolides in the genus Digitalis. It sum- terminal glucose: these cardenolides have been termed marizes studies with labelled and unlabelled precursors leading primary glycosides. After harvest or during the controlled to the formulation of the putative cardenolide pathway. Alter- fermentation of dried Digitalis leaves most of the primary native pathways of cardenolide biosynthesis are discussed as glycosides are hydrolyzed to yield the so-called secondary well. Special emphasis is laid on enzymes involved in either glycosides. Digitalis cardenolides are valuable drugs in the pregnane metabolism or the modification of cardenolides. medication of patients suffering from cardiac insufficiency. In About 20 enzymes which are probably involved in cardenolide therapy genuine glycosides, such as the lanatosides, are used formation have been described "downstream" of cholesterol, as well as compounds obtained after enzymatic hydrolysis including various reductases, oxido-reductases, glycosyl trans- and chemical saponification, for example digitoxin (31) and ferases and glycosidases as well as acyl transferases, acyl es- digoxin, or chemical modification of digoxin, such as metildig- terases and P450 enzymes. Evidence is accumulating that car- oxin. Digitalis lanata Ehrh. and D.purpurea L are the major denolides are not assembled on one straight conveyor belt but sources of the cardiac glycosides most frequently employed in instead are formed via a complex multidimensional metabolic medicine. -
Plant Toxins: Poison Or Therapeutic?
COLUMNS CHIMIA 2020, 74, No. 5 421 doi:10.2533/chimia.2020.421 Chimia 74 (2020) 421–422 © Swiss Chemical Society Chemical Education A CHIMIA Column Topics for Teaching: Chemistry in Nature Plant Toxins: Poison or Therapeutic? Catherine E. Housecroft* *Correspondence: Prof. C. E. Housecroft, E-mail: [email protected], Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 24a, CH-4058 Basel, Abstract: Many plants that are classed as poisonous also have therapeutic uses, and this is illustrated using members of the Drimia and Digitalis genera which are sources of cardiac glyco- sides. Keywords: Cardiac glycoside · Education · Plants · Stereochemistry · Toxins Earlier in this series of Chemical Education Columns, we in- troduced glycosides when describing anthocyanins.[1] In the pres- ent article, we focus on cardiac glycosides which are compounds Fig. 1. Digitalis lutea (small yellow foxglove). Edwin C. Constable 2019 that stimulate the heart. Scheme 1 shows the basic building blocks of the two main classes of cardiac glycosides: bufadienolides and altissima (tall white squill, Fig. 2) which is widely distributed in cardenolides. The prefix card- stems from the Greek for heart the savanna and open scrubland of sub-Saharan Africa. D. mar- (καρδια, kardiá), while buf- originates from the fact that toads itima (sea, maritime or red squill) grows in coastal regions of (genus Bufo) are one of the major sources of these compounds.[2] the Mediterranean, and its medicinal properties were described The ending -enolide refers to the lactone unit (a cyclic carboxylic as early as 1500 BCE. In the Indian subcontinent, the expecto- ester, top right in each structure in Scheme 1). -
Quo Vadis Cardiac Glycoside Research?
toxins Review Quo vadis Cardiac Glycoside Research? Jiˇrí Bejˇcek 1, Michal Jurášek 2 , VojtˇechSpiwok 1 and Silvie Rimpelová 1,* 1 Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 5, Prague 6, Czech Republic; [email protected] (J.B.); [email protected] (V.S.) 2 Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, Technická 3, Prague 6, Czech Republic; [email protected] * Correspondence: [email protected]; Tel.: +420-220-444-360 Abstract: AbstractCardiac glycosides (CGs), toxins well-known for numerous human and cattle poisoning, are natural compounds, the biosynthesis of which occurs in various plants and animals as a self-protective mechanism to prevent grazing and predation. Interestingly, some insect species can take advantage of the CG’s toxicity and by absorbing them, they are also protected from predation. The mechanism of action of CG’s toxicity is inhibition of Na+/K+-ATPase (the sodium-potassium pump, NKA), which disrupts the ionic homeostasis leading to elevated Ca2+ concentration resulting in cell death. Thus, NKA serves as a molecular target for CGs (although it is not the only one) and even though CGs are toxic for humans and some animals, they can also be used as remedies for various diseases, such as cardiovascular ones, and possibly cancer. Although the anticancer mechanism of CGs has not been fully elucidated, yet, it is thought to be connected with the second role of NKA being a receptor that can induce several cell signaling cascades and even serve as a growth factor and, thus, inhibit cancer cell proliferation at low nontoxic concentrations. -
The Science of Flavonoids the Science of Flavonoids
The Science of Flavonoids The Science of Flavonoids Edited by Erich Grotewold The Ohio State University Columbus, Ohio, USA Erich Grotewold Department of Cellular and Molecular Biology The Ohio State University Columbus, Ohio 43210 USA [email protected] The background of the cover corresponds to the accumulation of flavonols in the plasmodesmata of Arabidopsis root cells, as visualized with DBPA (provided by Dr. Wendy Peer). The structure corresponds to a model of the Arabidopsis F3 'H enzyme (provided by Dr. Brenda Winkel). The chemical structure corresponds to dihydrokaempferol. Library of Congress Control Number: 2005934296 ISBN-10: 0-387-28821-X ISBN-13: 978-0387-28821-5 ᭧2006 Springer ScienceϩBusiness Media, Inc. All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer ScienceϩBusiness Media, Inc., 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed in the United States of America (BS/DH) 987654321 springeronline.com PREFACE There is no doubt that among the large number of natural products of plant origin, debatably called secondary metabolites because their importance to the eco- physiology of the organisms that accumulate them was not initially recognized, flavonoids play a central role.