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Yang C, Halitschke R, O'Connor SE. OXIDOSQUALENE CYCLASE 1 and 2 influence triterpene biosynthesis and defense in Nicotiana attenuata. PLANT PHYSIOLOGY 2024; 194:2580-2599. [PMID: 38101922 PMCID: PMC10980520 DOI: 10.1093/plphys/kiad643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/07/2023] [Indexed: 12/17/2023]
Abstract
Triterpenes are a class of bioactive compounds with diverse biological functions, playing pivotal roles in plant defense against biotic stressors. Oxidosqualene cyclases (OSCs) serve as gatekeepers in the biosynthesis of triterpenes. In this study, we utilized a Nicotiana benthamiana heterologous expression system to characterize NaOSC1 from Nicotiana attenuata as a multifunctional enzyme capable of synthesizing lupeol, dammarenediol II, 3-alpha,20-lupanediol, and 7 other triterpene scaffolds. We also demonstrated that NaOSC2 is, in contrast, a selective enzyme, producing only the β-amyrin scaffold. Through virus-induced gene silencing and in vitro toxicity assays, we elucidated the roles of NaOSC1 and NaOSC2 in the defense of N. attenuata against Manduca sexta larvae. Metabolomic and feature-based molecular network analyses of leaves with silenced NaOSC1 and NaOSC2 unveiled 3 potential triterpene glycoside metabolite clusters. Interestingly, features identified as triterpenes within these clusters displayed a significant negative correlation with larval mass. Our study highlights the pivotal roles of NaOSC1 and NaOSC2 from N. attenuata in the initial steps of triterpene biosynthesis, subsequently influencing defense against M. sexta through the modulation of downstream triterpene glycoside compounds.
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Affiliation(s)
- Caiqiong Yang
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
| | - Rayko Halitschke
- Mass Spectrometry and Metabolomics, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
| | - Sarah E O'Connor
- Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena D-07745, Germany
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Camargo KC, de Aguilar MG, Moraes ARA, de Castro RG, Szczerbowski D, Miguel ELM, Oliveira LR, Sousa GF, Vidal DM, Duarte LP. Pentacyclic Triterpenoids Isolated from Celastraceae: A Focus in the 13C-NMR Data. Molecules 2022; 27:molecules27030959. [PMID: 35164224 PMCID: PMC8838773 DOI: 10.3390/molecules27030959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 12/10/2022] Open
Abstract
The Celastraceae family comprises about 96 genera and more than 1.350 species, occurring mainly in tropical and subtropical regions of the world. The species of this family stand out as important plant sources of triterpenes, both in terms of abundance and structural diversity. Triterpenoids found in Celastraceae species display mainly lupane, ursane, oleanane, and friedelane skeletons, exhibiting a wide range of biological activities such as antiviral, antimicrobial, analgesic, anti-inflammatory, and cytotoxic against various tumor cell lines. This review aimed to document all triterpenes isolated from different botanical parts of species of the Celastraceae family covering 2001 to 2021. Furthermore, a compilation of their 13C-NMR data was carried out to help characterize compounds in future investigations. A total of 504 pentacyclic triterpenes were compiled and distinguished as 29 aromatic, 50 dimers, 103 friedelanes, 89 lupanes, 102 oleananes, 22 quinonemethides, 88 ursanes and 21 classified as others.
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Affiliation(s)
| | | | | | | | | | | | | | - Grasiely Faria Sousa
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
| | - Diogo Montes Vidal
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
| | - Lucienir Pains Duarte
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
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da Cruz Albino R, Braz MM, Bizzo HR, Santana da Silva RV, Leitão SG, Ribeiro de Oliveira D. Amazonian medicinal smokes: Chemical analysis of Burseraceae pitch (breu) oleoresin smokes and insights into their use on headache. JOURNAL OF ETHNOPHARMACOLOGY 2021; 276:114165. [PMID: 33932517 DOI: 10.1016/j.jep.2021.114165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In Latin American Traditional Medicine, the use of Burseraceae oleoresins for headache relief is widespread. In the quilombola (maroon) communities of the municipality of Oriximiná, Pará State, Brazil, Burseraceae oleoresins are burned as incenses to treat headache; an effect attained by inhaling the smokes. AIM OF THE STUDY This study was designed to investigate the scientific rationale behind the use of Burseraceae pitch oleoresin smokes on headache by identifying its chemical constituents and discussing whether they could be beneficial for headache treatment. MATERIALS AND METHODS Two samples of pitch oleoresins were purchased from Amazonian public markets; one of them marketed as "breu preto" (black pitch), and the other as "breu branco" (white pitch). The smoke headspaces produced upon burning these oleoresins were collected and analysed by GC-MS. For comparative purposes, the triterpenoid fingerprints of the oleoresins' dichloromethane extracts and profiles of the essential oils were also obtained by GC-MS - and GC-FID, in the case of the essential oils. RESULTS A total of 32 compounds were detected in black and white pitch oleoresin smokes. All smoke headspaces of the pitch oleoresins shared the presence of volatile terpenoids (e.g., α-terpineol) and triterpenoids (e.g., α-amyrin, β-amyrin, α-amyrone, and β-amyrone). These compounds were also present in the crude resins and could potentially be responsible for anti-inflammatory, antinociceptive and analgesic effects on headache. CONCLUSIONS The pharmacological data on the terpenoids detected in the Burseraceae pitch smokes strongly support their traditional use for headache, but their actual effects upon inhalation have yet to be determined.
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Affiliation(s)
- Rayane da Cruz Albino
- Laboratory of Bioprospection and Applied Ethnopharmacology, Federal University of Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil.
| | - Marcelle Magalhães Braz
- Laboratory of Bioprospection and Applied Ethnopharmacology, Federal University of Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil.
| | | | - Raquel Vieira Santana da Silva
- Laboratory of Molecular and Environmental Organic Geochemistry, Federal University of Rio de Janeiro, 21941-598, Rio de Janeiro, Brazil.
| | - Suzana Guimarães Leitão
- Laboratório de Fitoquímica e Farmacognosia, Federal University of Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil.
| | - Danilo Ribeiro de Oliveira
- Laboratory of Bioprospection and Applied Ethnopharmacology, Federal University of Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil.
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Shan H, Wilson WK, Kamaric E. NOESY and DFT-GIAO Calculations Reveal Pervasive Errors in C20 Configurations of Taraxastane-3,20-diols: Proposals to Improve NMR Structure Determinations. Org Lett 2020; 22:1714-1719. [DOI: 10.1021/acs.orglett.9b04566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wan J, Zang Y, Xiao DA, Li N, Li J, Jin ZX, Chen DL, Xiong J, Li J, Hu JF. Stewartiacids A-N, C-23 carboxylated triterpenoids from Chinese Stewartia and their inhibitory effects against ATP-citrate lyase and NF-κB. RSC Adv 2020; 10:3343-3356. [PMID: 35497717 PMCID: PMC9048753 DOI: 10.1039/c9ra09542j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/10/2020] [Indexed: 11/30/2022] Open
Abstract
Fourteen previously undescribed naturally occurring C-23 carboxylated triterpenoids, stewartiacids A-N (1-14), were isolated and characterized from the twigs and leaves of the ornamental and medicinal plant Stewartia sinensis (Chinese Stewartia), a 'vulnerable' species endemic to China. The new structures were elucidated on the basis of spectroscopic data, single crystal X-ray diffraction, and electronic circular dichroism (ECD) analyses. Stewartiacids A (1) and B (2) are isoursenol derivatives. Stewartiacid C (3) is a 12-oxo-γ-amyrin analogue. Both isoursenol and γ-amyrin derivatives are quite rare in nature. Stewartiacids D (4) and E (5) are 13,27-cycloursane-type compounds. Stewartiacids K (11) and L (12) are ursane-type triterpene and phenylpropanol adducts built through a 1,4-dioxane ring, which are also seldom reported in the literature. The rest are common C-23 carboxylated ursane-type (6-10) and oleanane-type (13, 14) pentacyclic triterpenoids. Stewartiacids G (7), K (11), and L (12) showed moderate inhibitory effects against ATP-citrate lyase (ACL), with IC50 values of 12.5, 2.8, and 10.6 μM, respectively. Stewartiacid K (11) also exhibited moderate inhibition (IC50: 16.8 μM) of NF-κB.
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Affiliation(s)
- Jiang Wan
- Institute of Natural Medicine and Health Products, School of Advanced Study, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Taizhou 318000 Zhejiang PR China
- School of Pharmacy, Fudan University No. 826 Zhangheng Road Shanghai 201203 PR China +86-21-51980172 +86-21-51980172
| | - Yi Zang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences Shanghai 201203 PR China
| | - Dao-An Xiao
- College of Chemistry and Bioengineer, Yichun University Yichun 336000 PR China
| | - Na Li
- Institute of Natural Medicine and Health Products, School of Advanced Study, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Taizhou 318000 Zhejiang PR China
| | - Junmin Li
- Institute of Natural Medicine and Health Products, School of Advanced Study, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Taizhou 318000 Zhejiang PR China
| | - Ze-Xin Jin
- Institute of Natural Medicine and Health Products, School of Advanced Study, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Taizhou 318000 Zhejiang PR China
| | - De-Lei Chen
- School of Life Science, Hefei Normal University Hefei 230601 PR China
| | - Juan Xiong
- School of Pharmacy, Fudan University No. 826 Zhangheng Road Shanghai 201203 PR China +86-21-51980172 +86-21-51980172
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences Shanghai 201203 PR China
| | - Jin-Feng Hu
- Institute of Natural Medicine and Health Products, School of Advanced Study, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Taizhou 318000 Zhejiang PR China
- School of Pharmacy, Fudan University No. 826 Zhangheng Road Shanghai 201203 PR China +86-21-51980172 +86-21-51980172
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Knothe G, Razon LF, de Castro MEG. Fatty acids, triterpenes and cycloalkanes in ficus seed oils. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 135:127-131. [PMID: 30529978 DOI: 10.1016/j.plaphy.2018.11.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
The compositions of the seed oils obtained by hexane extraction of three members of the Ficus genus of the Moraceae plant family was determined, namely Ficus nota, Ficus septica, Ficus ulmifolia. Linolenic acid is the most prominent fatty acid in the seed oils followed by linoleic acid, with these two fatty acid comprising about 75% of the fatty acids in the oils. The high level of polyunsaturated fatty acids coincides with high levels of these acids predominating among the fatty acids observed in various plant parts of other Ficus species. Besides the fatty acids, a variety of phytochemicals also found in other plant parts of Ficus species were observed in the seed oils, including squalene, pentacyclic triterpenes such as α-amyrin, β-amyrin and lupeol, as well as sterols such as cholesterol and γ-sitosterol, the former at unusually elevated levels. The levels of these phytochemicals vary from species to species and location of harvest, with F. ulmifolia showing by far the highest level of these materials and with α-amyrin, β-amyrin and lupeol being the most common, their amounts exceeding those of fatty acids for samples from one specific location. Surprisingly, low levels of macrocyclic alkanes in the range of C24-C30 were identified.
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Affiliation(s)
- Gerhard Knothe
- National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, IL, 61604, USA.
| | - Luis F Razon
- Department of Chemical Engineering, De La Salle University, 2401 Taft Avenue, 1004, Manila, Philippines
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Dall’Acqua S, Peron G, Ferrari S, Gandin V, Bramucci M, Quassinti L, Mártonfi P, Maggi F. Phytochemical investigations and antiproliferative secondary metabolites from Thymus alternans growing in Slovakia. PHARMACEUTICAL BIOLOGY 2017; 55:1162-1170. [PMID: 28222613 PMCID: PMC6130594 DOI: 10.1080/13880209.2017.1291689] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 01/17/2017] [Accepted: 02/01/2017] [Indexed: 06/01/2023]
Abstract
CONTEXT Thymus alternans Klokov (Lamiaceae) is a neglected species of the genus Thymus (Sect. Serpyllum) endemic to Carpathian area, where it is used as a flavouring agent and for medicinal purposes. OBJECTIVE The aim of the work was to identify antiproliferative constituents from the flowering aerial parts of this plant. MATERIALS AND METHODS Thymus alternans extracts were analyzed by HPLC-MSn and subjected to extensive chromatographic separations. The isolated compounds (phenolics and triterpenes) were structurally elucidated by MS and 1D and 2D NMR experiments. Essential oil (EO) composition was determined by GC-FID and GC-MS. Six purified triterpenes and EO were assayed for in vitro antiproliferative activity against a panel of human cancer cells, namely, breast (MDA-MB 231), colon (HCT-15 and HCT116), lung (U1810), pancreatic (BxPC3), melanoma (A375) and cervical carcinoma (A431) cells. RESULTS The structures of the isolated compounds were achieved on the basis of H-NMR and MS experiments. Luteolin-4'-O-β-d-glucopyranoside (P1), chrysoeriol-7-O-β-d-glucopyranoside (P2), chrysoeriol-5-O-β-d-glucopyranoside (P3), apigenin-7-O-β-d-glucopyranoside (P4), rosmarinic acid (P5), rosmarinic acid-3'-O-β-d-glucopyranoside (P6), caffeic acid-3-O-β-d-glucopyranoside (P7), 3α-hydroxy-urs-12,15-diene (T1), α-amyrin (T2), β-amyrin (T3), isoursenol (T4), epitaraxerol (T5), and oleanolic acid (T6). GC-MS analysis revealed that the EO of T. alternans was devoid of phenols and belonged to the nerolidol-chemotype, that is typical of the Sect. Serpyllum. The six purified triterpenes (T1-T6) were active with IC50 ranging from 0.5 to 5 μM being comparable or better than those of reference compounds betulinic acid and cisplatin. The EO exhibited significant effects on A375, MDA-MB 231 and HCT116 cell lines with IC50 in the range of 5-8 μg/mL. CONCLUSION The reported results suggest that T. alternans can be considered as a good source of phytoconstituents with possible importance in the pharmaceutical field.
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Affiliation(s)
- Stefano Dall’Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Sara Ferrari
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | | | | | - Pavol Mártonfi
- Department of Botany, Institute of Biology and Ecology, P. J. Šafárik University, Košice, Slovakia
| | - Filippo Maggi
- School of Pharmacy, University of Camerino, Camerino, Italy
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Hoshino T. β-Amyrin biosynthesis: catalytic mechanism and substrate recognition. Org Biomol Chem 2017; 15:2869-2891. [DOI: 10.1039/c7ob00238f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In the past five years, there have been remarkable advances in the study of β-amyrin synthase. This review outlines the catalytic mechanism and substrate recognition in β-amyrin biosynthesis, which have been attained by the site-directed mutagenesis and substrate analog experiments.
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Affiliation(s)
- Tsutomu Hoshino
- Graduate School of Science and Technology and Department of Applied Biological Chemistry
- Faculty of Agriculture
- Niigata University
- Niigata 950-2181
- Japan
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Chen D, Zhang P, Sun Y, Wang P, Zhang C, Kong L, Zhang J, Sun H, Wen X. Protonated montmorillonite-mediated highly specific isomerization of oleanolic acid esters: application to the synthesis of Δ13(18)-CDDO-Me. Org Biomol Chem 2016; 14:11154-11161. [DOI: 10.1039/c6ob02126c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A one-pot highly specific isomerization of oleanolic acid esters (5a–g) to δ-oleanolic acid esters (6a–g) was achieved in the presence of proton-exchanged montmorillonite (H-mont) under mild reaction conditions.
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Affiliation(s)
- Dongyin Chen
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
- Department of Medicinal Chemistry
| | - Pu Zhang
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Yan Sun
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Pengfei Wang
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Can Zhang
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Lingyi Kong
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Ji Zhang
- Department of Physical Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Hongbin Sun
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Xiaoan Wen
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
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