1
|
Mittas D, Spitaler U, Bertagnoll M, Oettl S, Gille E, Schwaiger S, Stuppner H. Identification and structural elucidation of bioactive compounds from Scirpoides holoschoenus. PHYTOCHEMISTRY 2022; 200:113241. [PMID: 35597313 DOI: 10.1016/j.phytochem.2022.113241] [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: 01/17/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
Phytochemical investigations of dichloromethane and methanol extracts of roots and rhizomes of Scirpoides holoschoenus afforded 21 stilbenes, six flavonoids, six ferulic acid derivatives and four diterpenes. Among these constituents, six stilbenes, one flavonoid, one diterpene and two ferulic acid derivatives, represent previously unreported natural products. Structure elucidation was performed by HRESI-MS, NMR, GC-MS, and ECD data evaluation. The monoprenylated flavonoid (sophoraflavanone B) and all isolated stilbene oligomers (trans-scirpusin B, scirpusin A, cassigarol E, cyperusphenol B, cyperusphenol D, passiflorinol A, cyperusphenol A and mesocyperusphenol A) showed strong inhibitory activities on spore germination of two Botrytis cinerea strains isolated from field-infected grape berries and apple fruits compared to the reference controls resveratrol, piceid, and fenhexamid at a test concentration of 2.0 mM. For sophoraflavanone B and cyperusphenol A, the EC50 values were determined by concentration response curves and resulted in values of 0.35 mM and 0.53 mM, respectively. The data suggest that stilbene oligomers but also prenylated flavonoids should be examined further to gain more information on their antimicrobial activity and might be a suitable addition to chemical fungicides on the market to combat gray mold.
Collapse
Affiliation(s)
- Domenic Mittas
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, 6020, Austria
| | - Urban Spitaler
- Institute for Plant Health, Laimburg Research Center, Laimburg 6, Pfatten (Vadena), 39040, Italy
| | - Michaela Bertagnoll
- Institute for Plant Health, Laimburg Research Center, Laimburg 6, Pfatten (Vadena), 39040, Italy
| | - Sabine Oettl
- Institute for Plant Health, Laimburg Research Center, Laimburg 6, Pfatten (Vadena), 39040, Italy
| | - Elvira Gille
- National Institute for Research and Development of Biological Sciences-Bucharest, CCB Stejarul Piatra Neamt, Alexandru cel Bun no. 6, Piatra Neamt, 610004, Romania
| | - Stefan Schwaiger
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, 6020, Austria.
| | - Hermann Stuppner
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck, 6020, Austria
| |
Collapse
|
2
|
Deng R, Li W, Berhow MA, Jander G, Zhou S. Phenolic sucrose esters: evolution, regulation, biosynthesis, and biological functions. PLANT MOLECULAR BIOLOGY 2022; 109:369-383. [PMID: 33783685 DOI: 10.1007/s11103-021-01142-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Phenolic sucrose esters (PSEs) are a diverse group of specialized metabolites that are present in several angiosperm lineages. Phylogenetic reconstruction and structural variation suggest that these metabolites may have evolved independently in monocots and dicots. Constitutive variation in PSE abundance across plant organs and developmental stages is correlated with transcriptional regulation of the upstream phenylpropanoid pathway, whereas pathogen induction is regulated by stress-related phytohormones such as ethylene. Shared structural features of PSEs indicate that their biosynthesis may involve one or more hydroxycinnamoyl transferases and BAHD acetyltransferases, which could be identified by correlative analyses of multi-omics datasets. Elucidation of the core biosynthetic pathway of PSEs will be essential for more detailed studies of the biological function of these compounds and their potential medicinal and agricultural applications.
Collapse
Affiliation(s)
- Renyu Deng
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 440307, China
| | - Wei Li
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 440307, China
| | - Mark A Berhow
- Functional Foods Research Unit, Agricultural Research Service, USDA, National Center for Agricultural Utilization Research, 1815 N, University Street, Peoria, IL, 61604, USA
| | - Georg Jander
- Boyce Thompson Institute, Ithaca, NY, 14853, USA
| | - Shaoqun Zhou
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 440307, China.
| |
Collapse
|
3
|
A New Rotenoid Derivative from the Aerial Part of Boerhavia erecta. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03646-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Shabbir S, Khan S, Kazmi MH, Fatima I, Malik A, Inamullah F, Tareen RB. Brahucins A and B, new triterpene lactones from Spiraea brahuica. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:1037-1042. [PMID: 33307789 DOI: 10.1080/10286020.2020.1839431] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 06/12/2023]
Abstract
Brahucins A (1) and B (2), the new oleanane-type triterpene lactones, have been isolated from the EtOAc-soluble fraction of Spiraea brahuica Boiss, along with betulinic acid (3), oleanolic acid (4), 3-O-(β-D-glucopyranosyl) oleanolic acid (5), vanillic acid (6) and caffeic acid (7), reported for the first time from this species. The structures of these compounds were elucidated by spectroscopic studies including MS, IR, 1D and 2D NMR.
Collapse
Affiliation(s)
- Sundus Shabbir
- Department of Applied Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Sadia Khan
- Department of Applied Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Mehdi Hassan Kazmi
- Department of Applied Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Itrat Fatima
- International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Abdul Malik
- International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Farah Inamullah
- International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | | |
Collapse
|
5
|
Ngo NTN, Lai NTDDT, Le HC, Nguyen LTT, Trinh BTD, Nguyen HD, Pham PD, Dang SV, Nguyen LHD. Chemical constituents of Aglaia elaeagnoidea and Aglaia odorata and their cytotoxicity. Nat Prod Res 2021; 36:1494-1502. [PMID: 33703953 DOI: 10.1080/14786419.2021.1893723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Two new rocaglamides, 8b-O-5-oxohexylrocaglaol (1) and elaeagnin (2), together with twelve known compounds, were isolated from the bark of Aglaia elaeagnoidea and the whole tree of A. odorata. Their structures were determined using spectroscopic methods, mainly 1D and 2D NMR. Cytotoxic activity against HepG2 human liver cancer cells of the isolated compounds was evaluated in vitro using the SRB assay. Three rocaglamide derivatives, dehydroaglaiastatin (13), 8b-O-5-oxohexylrocaglaol (1) and rocaglaol (5), exhibited significant effects with IC50 values of 0.69, 4.77 and 7.37 µM, respectively.
Collapse
Affiliation(s)
- Ngoc T N Ngo
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngan T D D T Lai
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hao C Le
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Le-Thu T Nguyen
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Binh T D Trinh
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hiep D Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Phuoc D Pham
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Son V Dang
- Institute of Tropical Biology, VAST, Ho Chi Minh City, Vietnam
| | - Lien-Hoa D Nguyen
- Faculty of Chemistry, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| |
Collapse
|
6
|
Meng XH, Yang YJ, Gong Y, Zhu Y. Chemical constituents of the roots of Scorzonera divaricata and their chemotaxonomic significance. BIOCHEM SYST ECOL 2020. [DOI: 10.1016/j.bse.2020.104135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
7
|
|
8
|
Abstract
Four new octadecanoid derivatives (1-4) including a pair of enantiomers (1/2), along with 12 known analogues (5-16), were isolatedfrom the seeds of Ipomoea nil. Their structures were determined by detailed spectroscopic analyses and comparison with reported data of structurally related compounds, with the absolute configurations of 1 and 2 being assigned by an in situ dimolybdenum ECD method. Our bioassays revealed that these isolates did not show ABTS radical scavenging activity while 10 and 13 displayed better α-glucosidase inhibitory activity than the positive control acarbose (IC50 167.7 ± 1.55 μmol·L-1), with IC50 of 92.73 ± 3.12 and 11.39 ± 2.18μmol·L-1, respectively.
Collapse
|
9
|
Begum AS, Verma S, Sahai M, Asai T, Hara N, Fujimoto Y. Hyosmin, a New Lignan from Hyoscyamus Niger L. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823406779173497] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hyosmin (1) a new lignan has been isolated from the seeds of Hyoscyamus niger L. (Solanaceae), and its structure shown to be the 3-{[(2 R)-2-carbomethoxy-2-hydroxy]ethyl}benzoate ester of {(2 R,3 S,4 S)-2-(4-hydroxy-3-methoxyphenyl)-3-hydroxymethyl-4-[(4-hydroxy-3-methoxyphenyl)methyl]tetrahydrofuran
Collapse
Affiliation(s)
- Ahil Sajeli Begum
- Department of Pharmaceutics, IT, Banaras Hindu University, Varanasi 221005, India
| | - Shweta Verma
- Department of Medicinal Chemistry, IMS, Banaras Hindu University, Varanasi 221005, India
| | - Mahendra Sahai
- Department of Medicinal Chemistry, IMS, Banaras Hindu University, Varanasi 221005, India
| | - Teigo Asai
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Noriyuki Hara
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yoshinori Fujimoto
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| |
Collapse
|
10
|
Chang CI, Hsu CM, Li TS, Huang SD, Lin CC, Yen CH, Chou CH, Cheng HL. Constituents of the stem of Cucurbita moschata exhibit antidiabetic activities through multiple mechanisms. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.06.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
|
11
|
Evaluation of the Antihyperuricemic Activity of Phytochemicals from Davallia formosana by Enzyme Assay and Hyperuricemic Mice Model. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:873607. [PMID: 24883071 PMCID: PMC4026843 DOI: 10.1155/2014/873607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/17/2022]
Abstract
Abnormal serum urate levels are recognized as a critical factor in the progression of several chronic diseases. To evaluate the antihyperuricemic effect of Davallia formosana, the inhibitory activities of 15 isolated phytochemicals, including five novel compounds of 6,8-dihydroxychromone-7-C-β-d-glucopyranoside (1), 6,8,3′,4′-tetrahydroxyflavanone-7-C-β-d-glucopyranoside (2), 6,8,4′-trihydroxyflavanone-7-C-β-d-glucopyranoside (3), 8-(2-pyrrolidinone-5-yl)-catechin-3-O-β-d-allopyranoside (4), and epiphyllocoumarin-3-O-β-d-allopyranoside (5), were examined against xanthine oxidase (XOD) and in a potassium oxonate-(PTO-) induced acute hyperuricemic mice model. The results indicated that compounds 3 and 5 significantly inhibited XOD activity in vitro and reduced serum uric acid levels in vivo. This is the first report providing new insights into the antihyperuricemic activities of flavonoid glycosides which can possibly be developed into potential hypouricemic agents.
Collapse
|
12
|
Dong SH, Liu J, Ge YZ, Dong L, Xu CH, Ding J, Yue JM. Chemical constituents from Brucea javanica. PHYTOCHEMISTRY 2013; 85:175-184. [PMID: 23009875 DOI: 10.1016/j.phytochem.2012.08.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 05/20/2012] [Accepted: 08/24/2012] [Indexed: 06/01/2023]
Abstract
Fourteen apotirucallane-type triterpenoids, named brujavanones A-N, were isolated from the twigs of Brucea javanica, along with four known quassinoids and seven known lignans from the seeds of B. javanica. Their structures were elucidated on the basis of extensive spectroscopic data analysis. The structure of a previously reported triterpenoid, bruceajavanin C, was revised as its C-21 epimer. The cytotoxic activities of triterpenoids and quassinoids against two human tumor cell lines, HL-60 and A-549, were evaluated, but all the compounds were inactive (IC₅₀>10 μM).
Collapse
Affiliation(s)
- Shi-Hui Dong
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
13
|
Chen HJ, Lo YC, Chiang W. Inhibitory effects of adlay bran (Coix lachryma-jobi L. var. ma-yuen Stapf) on chemical mediator release and cytokine production in rat basophilic leukemia cells. JOURNAL OF ETHNOPHARMACOLOGY 2012; 141:119-127. [PMID: 22353428 DOI: 10.1016/j.jep.2012.02.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 02/03/2012] [Accepted: 02/06/2012] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Adlay (Job's tears, Coix lachryma-jobi L. var. ma-yuen Stapf) has long been used in China to treat rheumatism. AIM OF THE STUDY We investigated the anti-allergic effects of adlay bran on rat basophilic leukemia (RBL)-2H3 cells. MATERIALS AND METHODS To evaluate the anti-allergic effects of adlay bran, the release of histamines and cytokines were measured using ELISA. To explore the mechanism of these effects, the protein expression levels were determined using western blotting. RESULTS A 40.8μg/mL concentration of the ethyl acetate fraction of the ethanolic extracts of adlay bran (ABE-EtOAc) effectively inhibited mast cell degranulation. The 40-100% EtOAc/Hex subfractions of ABE-EtOAc inhibited histamine release with an IC(50) of 71-87μg/mL. Moreover, the ABE-EtOAc subfractions suppressed the secretion of interleukin (IL)-4, IL-6 and tumor necrosis factor-α in the RBL-2H3 cells, indicating that adlay bran can inhibit cytokine secretion in the late phase of the allergic reaction. In addition, adlay bran reduced the intracellular production of reactive oxygen species, inhibited the phosphorylation of Akt and decreased the expression of protein kinase C. Furthermore, six phenolic acids and one flavone were isolated. Of these compounds, luteolin showed the most potent inhibitory activity (IC(50)=1.5μg/mL). CONCLUSION Adlay bran extract reduced the release of histamines and cytokines and suppressed the production of Akt. These combined effects influenced the signal transduction in RBL-2H3 cells, thereby revealing the mechanisms of the anti-allergic effects of adlay.
Collapse
Affiliation(s)
- Hong-Jhang Chen
- Graduate Institute of Food Science and Technology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
| | | | | |
Collapse
|
14
|
Yu P, Zhang SD, Li YL, Yang XW, Zeng HW, Li HL, Zhang WD. Abieseconordines A and B, Two Novel Norditerpenoids with a 18-Nor-5,10 : 9,10-disecoabietane Skeleton from Abies forrestii. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201100341] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
15
|
Daudé D, Remaud-Siméon M, André I. Sucrose analogs: an attractive (bio)source for glycodiversification. Nat Prod Rep 2012; 29:945-60. [DOI: 10.1039/c2np20054f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
16
|
Sartorelli P, Lago JHG, Cunha RL, Kitamura RO, Young MCM. A new minor dimmeric ester from seeds ofCassia fistulaL. (Leguminosae). Nat Prod Res 2012; 26:36-41. [DOI: 10.1080/14786419.2010.532128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
17
|
Li YL, Wu L, Ouyang DW, Yu P, Xia JH, Pan YX, Yang XW, Zeng HW, Cheng XR, Jin HZ, Zhang WD. Phenolic Compounds of Abies nephrolepis and Their NO Production Inhibitory Activities. Chem Biodivers 2011; 8:2299-309. [DOI: 10.1002/cbdv.201000373] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
18
|
Elsebai MF, Kehraus S, Gütschow M, König GM. Spartinoxide, a New Enantiomer of A82775C with Inhibitory Activity toward HLE from the Marine-derived Fungus Phaeosphaeria spartinae. Nat Prod Commun 2010. [DOI: 10.1177/1934578x1000500718] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The fungus Phaeosphaeria spartinae is an endophyte of the marine alga Ceramium sp. Investigation of this marine-derived fungus led to the isolation of spartinoxide (1), which is the enantiomer of the known compound A82775C (2). Additionally, the known metabolites 4-hydroxy-3-prenyl-benzoic acid (4) and anofinic acid (5) were obtained. The structures of all compounds were established from extensive spectroscopic investigations. Compounds 1, 4 and 5 were assayed against the enzymes human leukocyte elastase (HLE), trypsin, acetylcholinesterase and cholesterolesterase. Compounds 1 and 4 showed potent inhibition of HLE with IC50 values of 1.71 ± 0.30 μg/mL (6.5 μM) and 1.67 ± 0.32 μg/mL (8.1 μM), respectively.
Collapse
Affiliation(s)
| | - Stefan Kehraus
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany
| | - Michael Gütschow
- Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Gabriele M. König
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany
| |
Collapse
|
19
|
Rodrigues E, Tabach R, GaldurÓz JCF, Negri G. Plants With Possible Anxiolytic and/or Hypnotic Effects Indicated by Three Brazilian Cultures - Indians, Afro-Brazilians, and River-Dwellers. BIOACTIVE NATURAL PRODUCTS (PART O) 2008. [DOI: 10.1016/s1572-5995(08)80014-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
20
|
|
21
|
Smith LR, Mahoney N, Molyneux RJ. Synthesis and structure-phytotoxicity relationships of acetylenic phenols and chromene metabolites, and their analogues, from the grapevine pathogen Eutypa lata. JOURNAL OF NATURAL PRODUCTS 2003; 66:169-176. [PMID: 12608846 DOI: 10.1021/np020415t] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Eutypa lata, the fungus responsible for dying-arm disease in grapevines, produces a number of structurally related secondary metabolites, of which eutypine (1) has been implicated as the principal phytotoxin. However, analysis of an E. lata strain from California known to be pathogenic to grapevines showed that eutypine was not present, suggesting that other metabolites could be phytotoxic. Investigation of the relative phytotoxicities of individual metabolites has been limited by insufficient material and lack of a reliable bioassay. Metabolites of particular interest and their precursors were therefore synthesized, and a rapid, quantitative bioassay via topical application of individual compounds to disks of grape leaves and measurement of chlorophyll loss was developed to provide a relative measure of tissue damage. The recently reported metabolite eulatachromene (2) was found to have phytotoxicity greater than that of eutypine (1). The cyclization product, 5-formyl-2-methylvinyl[1]benzofuran (3), also showed significant activity, whereas the reduction product, eutypinol (4), was inactive, as was the quinol, siccayne (5). These results indicate that before strains of Eutypa are incriminated as pathogenic they must be analyzed for the presence or absence of specific constituents for which the phytotoxicity has been unequivocally established.
Collapse
Affiliation(s)
- Leverett R Smith
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA
| | | | | |
Collapse
|
22
|
Ma CY, Liu WK, Che CT. Lignanamides and nonalkaloidal components of Hyoscyamus niger seeds. JOURNAL OF NATURAL PRODUCTS 2002; 65:206-209. [PMID: 11858758 DOI: 10.1021/np010073b] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four lignanamides, a tyramine derivative, and 10 other nonalkaloidal components were isolated from the seeds of Hyoscyamus niger. Among them, hyoscyamide (1), 1,24-tetracosanediol diferulate (6), and 1-O-(9Z,12Z-octadecadienoyl)-3-O-nonadecanoyl glycerol (7) are new structures. The other compounds were identified as grossamide, cannabisin D, cannabisin G, N-trans-feruloyl tyramine, 1-O-octadecanoyl glycerol, 1-O-(9Z,12Z-octadecadienoyl) glycerol, 1-O-(9Z,12Z-octadecadienoyl)-2-O-(9Z,12Z-octadecadienoyl) glycerol, 1-O-(9Z,12Z-octadecadienoyl)-3-O-(9Z-octadecenoyl) glycerol, rutin, vanillic acid, beta-sitosterol, and daucosterol. Grossamide, and cannabisins D and G exhibited moderate cytotoxicity in cultured LNCaP human prostate cancer cells.
Collapse
Affiliation(s)
- Cui-Ying Ma
- Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong
| | | | | |
Collapse
|
23
|
Dimberg LH, Andersson RE, Gohil S, Bryngelsson S, Lundgren LN. Identification of a sucrose diester of a substituted beta-truxinic acid in oats. PHYTOCHEMISTRY 2001; 56:843-847. [PMID: 11324915 DOI: 10.1016/s0031-9422(00)00505-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel compound, 4,4'-dihydroxy-3,3'-dimethoxy-beta-truxinic acid esterified to sucrose through the fructosyl 3-and 6-carbons (1), was isolated from oat grains (Avena sativa L.). Its structure was determined by a combination of mass spectrometry and 1-D and 2-D NMR. The amounts of 1 in groats of six different oat cultivars ranged from 101 to 150 microg g(-1) (dry wt). None was detected in the hulls. The free diacid, 4,4'-dihydroxy-3,3'-dimethoxy-beta-truxinic acid (2), could not be detected in groats nor in hulls.
Collapse
Affiliation(s)
- L H Dimberg
- Department of Food Science, Swedish University of Agricultural Science, Uppsala.
| | | | | | | | | |
Collapse
|