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Pérez-Gómez L, Pérez-Martínez AT, Matheeussen A, Pieters L, Mendez D, Quirós-Molina Y, Trujillo R, Tuenter E, Cos P. Phytochemical characterization and antifungal potential of leaf extracts of Mosiera bullata. Nat Prod Res 2024; 38:3301-3310. [PMID: 37548293 DOI: 10.1080/14786419.2023.2244132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/08/2023] [Accepted: 07/24/2023] [Indexed: 08/08/2023]
Abstract
The investigation of natural alternatives to conventional fungicides is of imminent need. Mosiera bullata (Britton & P. Wilson) Bisse is a Cuban endemic plant species belonging to the Myrtaceae family. The objective of the present study was to perform a bioassay-guided fractionation to explore the potential of extracts and fractions from M. bullata leaves against a panel of fungal plant pathogens. The M. bullata total extract was confirmed to have good antifungal activity against R. oryzae (IC50 = 4.86 µg/mL) and moderate activity against F. oxysporum (IC50 = 352.40 µg/mL) and F. solani (IC50 = 427.38 µg/mL) and fungicidal effect against R. oryzae. Five compounds belonging to the class of phloroglucinol dimers were tentatively characterized by UHPLC-HRMS and reported for the first time in M. bullata and the genus Mosiera. These results suggest the potential of M. bullata total extract as a natural antifungal product for the control of diseases in agriculture.
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Affiliation(s)
- Lianny Pérez-Gómez
- Bioplantas Centre, Universidad de Ciego de Ávila Máximo Gómez Báez, Ciego de Ávila, Cuba
| | | | - An Matheeussen
- bLaboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Luc Pieters
- Natural Products & Food Research and Analysis - Pharmaceutical Technology (NatuRAPT), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Daniel Mendez
- Chemistry Department, University of Camagüey, Camagüey, Cuba
| | - Yemeys Quirós-Molina
- Bioplantas Centre, Universidad de Ciego de Ávila Máximo Gómez Báez, Ciego de Ávila, Cuba
| | - Reinaldo Trujillo
- Bioplantas Centre, Universidad de Ciego de Ávila Máximo Gómez Báez, Ciego de Ávila, Cuba
| | - Emmy Tuenter
- Natural Products & Food Research and Analysis - Pharmaceutical Technology (NatuRAPT), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Paul Cos
- bLaboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
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2
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Phang YL, Liu S, Zheng C, Xu H. Recent advances in the synthesis of natural products containing the phloroglucinol motif. Nat Prod Rep 2022; 39:1766-1802. [PMID: 35762867 DOI: 10.1039/d1np00077b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Covering: June 2009 to 2021Natural products containing a phloroglucinol motif include simple and oligomeric phloroglucinols, polycyclic polyprenylated acylphloroglucinols, phloroglucinol-terpenes, xanthones, flavonoids, and coumarins. These compounds represent a major class of secondary metabolites which exhibit a wide range of biological activities such as antimicrobial, anti-inflammatory, antioxidant and hypoglycaemic properties. A number of these compounds have been authorized for therapeutic use or are currently being studied in clinical trials. Their structural diversity and utility in both traditional and conventional medicine have made them popular synthetic targets over the years. In this review, we compile and summarise the recent synthetic approaches to the natural products bearing a phloroglucinol motif. Focus has been given on ingenious strategies to functionalize the phloroglucinol moiety at multiple positions. The isolation and bioactivities of the compounds are also provided.
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Affiliation(s)
- Yee Lin Phang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Song Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongxi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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3
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Fan Y, Shen J, Liu Z, Xia K, Zhu W, Fu P. Methylene-bridged dimeric natural products involving one-carbon unit in biosynthesis. Nat Prod Rep 2022; 39:1305-1324. [DOI: 10.1039/d2np00022a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes the methylene-bridged dimeric natural products involving one-carbon unit in biosynthesis, including their structures, biological activities, synthetic methods, and formation mechanisms.
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Affiliation(s)
- Yaqin Fan
- Shandong Provincial Key Laboratory of Applied Mycology, School of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Jingjing Shen
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Zhi Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Kunyu Xia
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
| | - Peng Fu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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4
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Dall'Acqua S, Ak G, Sinan KI, Elbasan F, Ferrarese I, Sut S, Yıldıztugay E, Peron G, Schievano E, Nancy Picot-Allain MC, Mahomoodally MF, Zengin G. Hypericum triquetrifolium and H. neurocalycinum as Sources of Antioxidants and Multi-Target Bioactive Compounds: A Comprehensive Characterization Combining In Vitro Bioassays and Integrated NMR and LC-MS Characterization by Using a Multivariate Approach. Front Pharmacol 2021; 12:660735. [PMID: 33841167 PMCID: PMC8033251 DOI: 10.3389/fphar.2021.660735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 02/11/2021] [Indexed: 12/19/2022] Open
Abstract
Hypericum triquetrifolium and H. neurocalycinum were evaluated for their phytochemical content and in vitro bioactivity. NMR analyses were performed on the methanol extract of the aerial parts of H. triquetrifolium to establish the main classes of phytoconstituents. Then, LC-DAD-MSn analyses were performed in order to compare the composition of aerial parts and roots extracts of both Hypericum species, obtained using either methanol or water as solvents. Results, processed using multivariate data analysis, showed a significantly higher phenolic content of methanol extracts compared to water extracts, while minor qualitative differences were observed between the two. Distinctive flavonoid and PAC patterns were observed for H. triquetrifolium and H. neurocalycinum, and specific compounds were exclusively detected in one or the other species. Specifically, the phloroglucinols 7-epiclusianone, hyperfirin and hyperforin were present only in H. neurocalycinum, while hyperforin was detected only in H. triquetrifolium. Extracts were assayed using different in vitro tests to evaluate their antioxidant properties and their inhibitory activity against several enzymes, showing significant antioxidant and metal chelating activities. Furthermore, inhibitory properties against acetylcholinesterase, butyrylcholinesterase and tyrosinase were observed. Multivariate approaches were used to correlate biological data with the phytochemical composition of the different extracts. The results, showing positive correlations between specific chemical constituents and the measured bioactivities, represent preliminary data that could guide future studies aimed at isolating bioactive constituents from H. neurocalycinum and H. triquetrifolium for further pharmacological evaluations.
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Affiliation(s)
- Stefano Dall'Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Gunes Ak
- Department of Biology, Science Faculty, Selcuk University, Konya, Turkey
| | | | - Fevzi Elbasan
- Department of Biotechnology, Science Faculty, Selcuk University, Konya, Turkey
| | - Irene Ferrarese
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Stefania Sut
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Evren Yıldıztugay
- Department of Biotechnology, Science Faculty, Selcuk University, Konya, Turkey
| | - Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | | | | | - Mohamad Fawzi Mahomoodally
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Mauritius, Mauritius
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya, Turkey
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5
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Peron G, Pant DR, Shrestha SS, Rajbhandary S, Dall’Acqua S. An Integrated LC-ESI-MS n and High Resolution LC-ESI-QTOF Approach for the Identification of Phloroglucinols from Nepalese Hypericum japonicum. Molecules 2020; 25:E5937. [PMID: 33333871 PMCID: PMC7765257 DOI: 10.3390/molecules25245937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/10/2020] [Accepted: 12/10/2020] [Indexed: 11/16/2022] Open
Abstract
Phloroglucinols are characteristic constituents of Hypericumjaponicum that are claimed to exert several bioactivities, such as anti-inflammatory, anti-depressant and anti-viral ones. Phloroglucinols are unstable compounds and their synthesis is challenging; thus, isolation from natural sources is still one of the main strategies for obtaining these constituents in purified form. Assessing the presence of phloroglucinols in plant materials can be of interest for compound isolation, and LC-MS approaches afford sensitivity and specificity in this regard. In this work, we combined data from quadrupole-time of flight (QTOF) and ion trap (IT) mass spectrometers in order to assess the presence of the phloroglucinols characteristic of H. japonicum and to elucidate their MS fragmentation pathways. The identified compounds present similar structures bearing the 1,3,5-trihydroxybenzene core with different substitutions, which, in constituents at higher MW, is linked to 3',3'-dimethyl-6'-oxo-phlorisobutyrophenone by a methylene bridge. Differences in MS2 spectra of the considered phloroglucinols are useful for compound identification and differentiation, and to perform dereplication studies. Overall, the proposed approach could be useful for the analysis of phloroglucinols in H. japonicum and other plant species.
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Affiliation(s)
- Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Deepak Raj Pant
- Central Department of Botany, Tribhuvan University, Kirtipur 44600, Kathmandu, Nepal; (D.R.P.); (S.S.S.); (S.R.)
| | - Shyam Sharan Shrestha
- Central Department of Botany, Tribhuvan University, Kirtipur 44600, Kathmandu, Nepal; (D.R.P.); (S.S.S.); (S.R.)
| | - Sangeeta Rajbhandary
- Central Department of Botany, Tribhuvan University, Kirtipur 44600, Kathmandu, Nepal; (D.R.P.); (S.S.S.); (S.R.)
| | - Stefano Dall’Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
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Liu F, Tian HY, Huang XL, Wang WJ, Li NP, He J, Ye WC, Wang L. Xanthchrysones A-C: Rearranged Phenylpropanoyl-Phloroglucinol Dimers with Unusual Skeletons from Xanthostemon chrysanthus. J Org Chem 2019; 84:15355-15361. [PMID: 31697081 DOI: 10.1021/acs.joc.9b02373] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Three pairs of dimeric phenylpropanoyl-phloroglucinol enantiomers, (+)- and (-)-xanthchrysones A-C [(+)- and (-)-1-3], as well as their postulated biosynthetic precursors, were isolated and identified from the leaves of Xanthostemon chrysanthus. Compound 1 featured an unprecedented bis-phenylpropanoyl-benzo[b]cyclopent[e] oxepine tricyclic backbone. Compounds 2 and 3 represent the first examples of 1-(cyclopentylmethyl)-3-(3-phenylpropanoyl)benzene scaffold. The structures and absolute configurations of 1-3 were determined by spectroscopic and X-ray diffraction analysis as well as electronic circular dichroism (ECD) calculation. Both (+)-2 and (-)-2 showed moderate antibacterial activities including several multidrug-resistant strains.
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7
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Peron G, Hošek J, Rajbhandary S, Pant DR, Dall'Acqua S. LC-MS n and HR-MS characterization of secondary metabolites from Hypericum japonicum Thunb. ex Murray from Nepalese Himalayan region and assessment of cytotoxic effect and inhibition of NF-κB and AP-1 transcription factors in vitro. J Pharm Biomed Anal 2019; 174:663-673. [PMID: 31288189 DOI: 10.1016/j.jpba.2019.06.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 10/26/2022]
Abstract
Hypericum japonicum Thunb. ex Murray is traditionally used in Nepal to treat several diseases, among whom inflammation and acute pain. Although several secondary metabolites from the same Hypericum species have been already characterized and considered for their pharmacological use, an exhaustive phytochemical characterization of H. japonicum from Nepal is lacking, as well as the assessment of its potential pharmacological properties. Hence, the aims of this study were the characterization of a methanolic extract of H. japonicum (HJME) collected from the Northern region of Nepal by LC-MSn and UPLC-QTOF. The assessment of in vitro inhibition of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and activator protein 1 (AP-1) transcription factors and HJME's cytotoxic effect on human cell lines was performed to evaluate the potential use of this herb as a source of anti-inflammatory and cytotoxic lead compounds. Fifty-seven phytoconstituents were identified, being mainly flavonoids, phloroglucinols, phenolic acids and xanthones. Although compounds characteristic of H. japonicum were detected (quercetin, quercetin-7-O-α-l-rhamnoside, quercitrin and hyperoside), several others are here reported for the first time in this species. The results from bioassays indicated that HJME could significantly reduce the viability of human THP-1 cells (IC50 = 5.4 ± 1.1 μg mL-1), showing the promising potential of HJME as anti-tumor agent. Furthermore, HJME significantly decreased the activation of both NF-κB and AP-1 at the concentration of 2 μg mL-1. Overall, these data suggest that H. japonicum from Nepal could be used as a source of potential natural anti-inflammatory and anti-tumor lead compounds.
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Affiliation(s)
- Gregorio Peron
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
| | - Jan Hošek
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.
| | - Sangeeta Rajbhandary
- Central Department of Botany, Tribhuvan University, 44600 Kirtipur, Kathmandu, Nepal.
| | - Deepak Raj Pant
- Central Department of Botany, Tribhuvan University, 44600 Kirtipur, Kathmandu, Nepal.
| | - Stefano Dall'Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy.
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8
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Akaberi M, Danton O, Tayarani-Najaran Z, Asili J, Iranshahi M, Emami SA, Hamburger M. HPLC-Based Activity Profiling for Antiprotozoal Compounds in the Endemic Iranian Medicinal Plant Helichrysum oocephalum. JOURNAL OF NATURAL PRODUCTS 2019; 82:958-969. [PMID: 30916554 DOI: 10.1021/acs.jnatprod.8b01031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In a screening of Iranian plants for antiprotozoal activity a dichlomethane extract from the aerial parts of Helichrysum oocephalum showed in vitro antiprotozoal activity against Plasmodium falciparum and Leishmania donovani, with IC50 values of 4.01 ± 0.50 and 5.08 ± 0.07 μg/mL, respectively. The activity in the extract was tracked by HPLC-based activity profiling, and subsequent targeted preparative isolation afforded 24 compounds, including pyrones 22-24, phloroglucinol derivatives 12-19, and compounds containing both structural motifs (1-11, 20, and 21). Of these, 15 compounds were new natural products. The in vitro antiprotozoal activity of isolates was determined. Compound 3 showed good potency and selectivity in vitro against L. donovani (IC50 1.79 ± 0.17 μM; SI 53).
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Affiliation(s)
- Maryam Akaberi
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences , University of Basel , Klingelbergstrasse 50 , 4056 Basel , Switzerland
- Department of Pharmacognosy, School of Pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Ombeline Danton
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences , University of Basel , Klingelbergstrasse 50 , 4056 Basel , Switzerland
| | - Zahra Tayarani-Najaran
- Biotechnology Research Center, Pharmaceutical Technology Institute , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Javad Asili
- Department of Pharmacognosy, School of Pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Mehrdad Iranshahi
- Department of Pharmacognosy, School of Pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - S Ahmad Emami
- Department of Pharmacognosy, School of Pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Matthias Hamburger
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences , University of Basel , Klingelbergstrasse 50 , 4056 Basel , Switzerland
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9
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Setzer WN. The Phytochemistry of Cherokee Aromatic Medicinal Plants. MEDICINES (BASEL, SWITZERLAND) 2018; 5:E121. [PMID: 30424560 PMCID: PMC6313439 DOI: 10.3390/medicines5040121] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 12/13/2022]
Abstract
Background: Native Americans have had a rich ethnobotanical heritage for treating diseases, ailments, and injuries. Cherokee traditional medicine has provided numerous aromatic and medicinal plants that not only were used by the Cherokee people, but were also adopted for use by European settlers in North America. Methods: The aim of this review was to examine the Cherokee ethnobotanical literature and the published phytochemical investigations on Cherokee medicinal plants and to correlate phytochemical constituents with traditional uses and biological activities. Results: Several Cherokee medicinal plants are still in use today as herbal medicines, including, for example, yarrow (Achillea millefolium), black cohosh (Cimicifuga racemosa), American ginseng (Panax quinquefolius), and blue skullcap (Scutellaria lateriflora). This review presents a summary of the traditional uses, phytochemical constituents, and biological activities of Cherokee aromatic and medicinal plants. Conclusions: The list is not complete, however, as there is still much work needed in phytochemical investigation and pharmacological evaluation of many traditional herbal medicines.
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Affiliation(s)
- William N Setzer
- Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA.
- Aromatic Plant Research Center, 230 N 1200 E, Suite 102, Lehi, UT 84043, USA.
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10
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Bridi H, Meirelles GDC, von Poser GL. Structural diversity and biological activities of phloroglucinol derivatives from Hypericum species. PHYTOCHEMISTRY 2018; 155:203-232. [PMID: 30153613 DOI: 10.1016/j.phytochem.2018.08.002] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 07/25/2018] [Accepted: 08/12/2018] [Indexed: 06/08/2023]
Abstract
Plants of the genus Hypericum (Hypericaceae) are used in folk medicine all over the world, H. perforatum being the most well-known species. Standardized extracts of this plant are commercially-available to treat mild to moderate depression cases. The present review summarizes the literature published up to 2016 concerning the phloroglucinol derivatives isolated from Hypericum species, together with their structural features and biological activities. These phytochemical studies led to the isolation of 101 prenylated phloroglucinols, chromanes and chromenes, 35 dimeric acylphloroglucinols, 235 polycyclic polyprenylated acylphloroglucinols, 25 simple benzophenones and 33 phloroglucinol-terpene adducts. These compounds show a diverse range of biological activities, such as antimicrobial, cytotoxic, antinociceptive and antidepressant-like effects.
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Affiliation(s)
- Henrique Bridi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Avenida Ipiranga 2752, Porto Alegre/RS, 90610-000, Brazil
| | | | - Gilsane Lino von Poser
- Programa de Pós-Graduação em Ciências Farmacêuticas, Avenida Ipiranga 2752, Porto Alegre/RS, 90610-000, Brazil.
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11
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Rizhsky L, Jin H, Shepard MR, Scott HW, Teitgen AM, Perera MA, Mhaske V, Jose A, Zheng X, Crispin M, Wurtele ES, Jones D, Hur M, Góngora-Castillo E, Buell CR, Minto RE, Nikolau BJ. Integrating metabolomics and transcriptomics data to discover a biocatalyst that can generate the amine precursors for alkamide biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 88:775-793. [PMID: 27497272 PMCID: PMC5195896 DOI: 10.1111/tpj.13295] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/30/2016] [Accepted: 08/02/2016] [Indexed: 05/03/2023]
Abstract
The Echinacea genus is exemplary of over 30 plant families that produce a set of bioactive amides, called alkamides. The Echinacea alkamides may be assembled from two distinct moieties, a branched-chain amine that is acylated with a novel polyunsaturated fatty acid. In this study we identified the potential enzymological source of the amine moiety as a pyridoxal phosphate-dependent decarboxylating enzyme that uses branched-chain amino acids as substrate. This identification was based on a correlative analysis of the transcriptomes and metabolomes of 36 different E. purpurea tissues and organs, which expressed distinct alkamide profiles. Although no correlation was found between the accumulation patterns of the alkamides and their putative metabolic precursors (i.e., fatty acids and branched-chain amino acids), isotope labeling analyses supported the transformation of valine and isoleucine to isobutylamine and 2-methylbutylamine as reactions of alkamide biosynthesis. Sequence homology identified the pyridoxal phosphate-dependent decarboxylase-like proteins in the translated proteome of E. purpurea. These sequences were prioritized for direct characterization by correlating their transcript levels with alkamide accumulation patterns in different organs and tissues, and this multi-pronged approach led to the identification and characterization of a branched-chain amino acid decarboxylase, which would appear to be responsible for generating the amine moieties of naturally occurring alkamides.
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Affiliation(s)
- Ludmila Rizhsky
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa, USA
| | - Huanan Jin
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
- Engineering Research Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa, USA
| | - Michael R. Shepard
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 N. Blackford Street, Indianapolis, Indiana 46202, USA
| | - Harry W. Scott
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 N. Blackford Street, Indianapolis, Indiana 46202, USA
| | - Alicen M. Teitgen
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 N. Blackford Street, Indianapolis, Indiana 46202, USA
| | - M. Ann Perera
- W.M. Keck Metabolomics Research Laboratory, Iowa State University, Ames, Iowa, USA
| | - Vandana Mhaske
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
| | - Adarsh Jose
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa, USA
| | - Xiaobin Zheng
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
| | - Matt Crispin
- Department of Genetics, Development & Cell Biology-LAS, Iowa State University, Ames, Iowa, USA
| | - Eve S. Wurtele
- Department of Genetics, Development & Cell Biology-LAS, Iowa State University, Ames, Iowa, USA
| | - Dallas Jones
- Department of Genetics, Development & Cell Biology-LAS, Iowa State University, Ames, Iowa, USA
| | - Manhoi Hur
- Department of Genetics, Development & Cell Biology-LAS, Iowa State University, Ames, Iowa, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa, USA
| | | | - C. Robin Buell
- Department of Plant Biology, Michigan State University, East Lansing MI 48824 USA
| | - Robert E. Minto
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 N. Blackford Street, Indianapolis, Indiana 46202, USA
| | - Basil J. Nikolau
- The Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa, USA
- Engineering Research Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa, USA
- Corresponding Author: Basil J. Nikolau;
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12
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Biosynthesis of phlorisovalerophenone and 4-hydroxy-6-isobutyl-2-pyrone in Escherichia coli from glucose. Microb Cell Fact 2016; 15:149. [PMID: 27577056 PMCID: PMC5004256 DOI: 10.1186/s12934-016-0549-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 08/22/2016] [Indexed: 12/27/2022] Open
Abstract
Background Type III polyketide synthases (PKSs) contribute to the synthesis of many economically important natural products, which are typically produced by direct extraction from plants or synthesized chemically. For example, humulone and lupulone (Fig. 1a) in hops (Humulus lupulus) account for the characteristic bitter taste of beer and display multiple pharmacological effects. 4-Hydroxy-6-methyl-2-pyrone is a precursor of parasorboside contributing to insect and disease resistance of plant Gerbera hybrida, and was recently demonstrated to be a potential platform chemical.Examples of phloroglucinols (a) and 2-pyrones (b) synthesized by type III PKS. PIBP phlorisobutyrophenone; PIVP phlorisovalerophenone; TAL 4-hydroxy-6-methyl-2-pyrone (triacetic acid lactone); HIPP 4-hydroxy-6-isopropyl-2-pyrone; HIBP 4-hydroxy-6-isobutyl-2-pyrone ![]() Results In this study, we achieved simultaneous biosynthesis of phlorisovalerophenone, a key intermediate of humulone biosynthesis and 4-hydroxy-6-isobutyl-2-pyrone in Escherichia coli from glucose. First, we constructed a biosynthetic pathway of isovaleryl-CoA via hydroxy-3-methylglutaryl CoA followed by dehydration, decarboxylation and reduction in E. coli. Subsequently, the type III PKSs valerophenone synthase or chalcone synthase from plants were introduced into the above E. coli strain, to produce phlorisovalerophenone and 4-hydroxy-6-isobutyl-2-pyrone at the highest titers of 6.4 or 66.5 mg/L, respectively. Conclusions The report of biosynthesis of phlorisovalerophenone and 4-hydroxy-6-isobutyl-2-pyrone in E. coli adds a new example to the list of valuable compounds synthesized in E. coli from renewable carbon resources by type III PKSs. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0549-9) contains supplementary material, which is available to authorized users.
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Fobofou SAT, Harmon CR, Lonfouo AHN, Franke K, Wright SM, Wessjohann LA. Prenylated phenyl polyketides and acylphloroglucinols from Hypericum peplidifolium. PHYTOCHEMISTRY 2016; 124:108-113. [PMID: 26880290 DOI: 10.1016/j.phytochem.2016.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/01/2016] [Accepted: 02/07/2016] [Indexed: 06/05/2023]
Abstract
In search for new or chemo-taxonomically relevant bioactive compounds from chemically unexplored Hypericum species, four previously undescribed natural products, named peplidiforones A-D were isolated and characterized from Hypericum peplidifolium A. Rich., together with six known compounds. The structures of all compounds were elucidated by extensive 1D- and 2D-NMR experiments, high resolution mass spectrometric analyses (HR-MS), and by comparison with data reported in the literature. Seven of these compounds are phenyl polyketides while three are acylphloroglucinol type compounds. Peplidiforone C, which possesses an unusual carbon skeleton consisting of a furan ring substituted by a 2,2-dimethylbut-3-enoyl moiety, is the first example of a prenylated furan derivative isolated from the genus Hypericum. The cytotoxicity, antifungal, and anti-herpes simplex virus type 1 (HSV-1) activities of extracts and compounds are described.
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Affiliation(s)
- Serge Alain Tanemossu Fobofou
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Chelsea Rebecca Harmon
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; Department of Chemistry, Middle Tennessee State University, P.O. Box 68, Murfreesboro, TN 37132, USA
| | - Antoine Honoré Nkuete Lonfouo
- Laboratory of Natural Products Chemistry, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Katrin Franke
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany.
| | - Stephen M Wright
- Department of Biology, Middle Tennessee State University, P.O. Box 60, Murfreesboro, TN 37132, USA
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany.
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Song C, Zhao S, Hong X, Liu J, Schulenburg K, Schwab W. A UDP-glucosyltransferase functions in both acylphloroglucinol glucoside and anthocyanin biosynthesis in strawberry (Fragaria × ananassa). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 85:730-42. [PMID: 26859691 DOI: 10.1111/tpj.13140] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 02/01/2016] [Accepted: 02/03/2016] [Indexed: 05/02/2023]
Abstract
Physiologically active acylphloroglucinol (APG) glucosides were recently found in strawberry (Fragaria sp.) fruit. Although the formation of the APG aglycones has been clarified, little is known about APG glycosylation in plants. In this study we functionally characterized ripening-related glucosyltransferase genes in Fragaria by comprehensive biochemical analyses of the encoded proteins and by a RNA interference (RNAi) approach in vivo. The allelic proteins UGT71K3a/b catalyzed the glucosylation of diverse hydroxycoumarins, naphthols and flavonoids as well as phloroglucinols, enzymatically synthesized APG aglycones and pelargonidin. Total enzymatic synthesis of APG glucosides was achieved by co-incubation of recombinant dual functional chalcone/valerophenone synthase and UGT71K3 proteins with essential coenzyme A esters and UDP-glucose. An APG glucoside was identified in strawberry fruit which has not yet been reported in other plants. Suppression of UGT71K3 activity in transient RNAi-silenced fruits led to a loss of pigmentation and a substantial decrease of the levels of various APG glucosides and an anthocyanin. Metabolite analyses of transgenic fruits confirmed UGT71K3 as a UDP-glucose:APG glucosyltransferase in planta. These results provide the foundation for the breeding of fruits with improved health benefits and for the biotechnological production of bioactive natural products.
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Affiliation(s)
- Chuankui Song
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
| | - Shuai Zhao
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
| | - Xiaotong Hong
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
| | - Jingyi Liu
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
| | - Katja Schulenburg
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Strasse 1, Freising, 85354, Germany
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16
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Yu Q, Ravu RR, Xu QM, Ganji S, Jacob MR, Khan SI, Yu BY, Li XC. Antibacterial Prenylated Acylphloroglucinols from Psorothamnus fremontii. JOURNAL OF NATURAL PRODUCTS 2015; 78:2748-2753. [PMID: 26469557 DOI: 10.1021/acs.jnatprod.5b00721] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Psorothatins A-C (1-3), three antibacterial prenylated acylphloroglucinol derivatives, were isolated from the native American plant Psorothamnus fremontii. They feature an unusual α,β-epoxyketone functionality and a β-hydroxy-α,β-unsaturated ketone structural moiety. The latter forms a pseudo-six-membered heterocyclic ring due to strong intramolecular hydrogen bonding, as indicated by the long-range proton-carbon correlations in the NMR experiments. Psorothatin C (3) was the most active compound against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium, with IC50 values in the range 1.4-8.8 μg/mL. The first total synthesis of 3 described herein permits future access to structural analogues with potentially improved antibacterial activities.
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Affiliation(s)
- Qian Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University , Nanjing, 211198, People's Republic of China
| | | | | | | | | | | | - Bo-Yang Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University , Nanjing, 211198, People's Republic of China
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Song C, Ring L, Hoffmann T, Huang FC, Slovin J, Schwab W. Acylphloroglucinol Biosynthesis in Strawberry Fruit. PLANT PHYSIOLOGY 2015; 169:1656-70. [PMID: 26169681 PMCID: PMC4634061 DOI: 10.1104/pp.15.00794] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 07/08/2015] [Indexed: 05/18/2023]
Abstract
Phenolics have health-promoting properties and are a major group of metabolites in fruit crops. Through reverse genetic analysis of the functions of four ripening-related genes in the octoploid strawberry (Fragaria × ananassa), we discovered four acylphloroglucinol (APG)-glucosides as native Fragaria spp. fruit metabolites whose levels were differently regulated in the transgenic fruits. The biosynthesis of the APG aglycones was investigated by examination of the enzymatic properties of three recombinant Fragaria vesca chalcone synthase (FvCHS) proteins. CHS is involved in anthocyanin biosynthesis during ripening. The F. vesca enzymes readily catalyzed the condensation of two intermediates in branched-chain amino acid metabolism, isovaleryl-Coenzyme A (CoA) and isobutyryl-CoA, with three molecules of malonyl-CoA to form phlorisovalerophenone and phlorisobutyrophenone, respectively, and formed naringenin chalcone when 4-coumaroyl-CoA was used as starter molecule. Isovaleryl-CoA was the preferred starter substrate of FvCHS2-1. Suppression of CHS activity in both transient and stable CHS-silenced fruit resulted in a substantial decrease of APG glucosides and anthocyanins and enhanced levels of volatiles derived from branched-chain amino acids. The proposed APG pathway was confirmed by feeding isotopically labeled amino acids. Thus, Fragaria spp. plants have the capacity to synthesize pharmaceutically important APGs using dual functional CHS/(phloriso)valerophenone synthases that are expressed during fruit ripening. Duplication and adaptive evolution of CHS is the most probable scenario and might be generally applicable to other plants. The results highlight that important promiscuous gene function may be missed when annotation relies solely on in silico analysis.
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Affiliation(s)
- Chuankui Song
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
| | - Ludwig Ring
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
| | - Thomas Hoffmann
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
| | - Fong-Chin Huang
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
| | - Janet Slovin
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany (C.S., L.R., T.H., F.-C.H., W.S.); andUnited States Department of Agriculture/Agricultural Research Service Genetic Improvement of Fruits and Vegetables Laboratory, Beltsville 20705, Maryland (J.S.)
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Abstract
The first total synthesis of rottlerin is described. The methodology allows the development of potential novel protein kinase C δ (PKCδ) analogues for better treatment of various diseases. Kamalachalcone A and dimeric rottlerin were synthesized in a very practical and economical way using FeCl3 as a catalyst.
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Affiliation(s)
- Kenneth K C Hong
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Graham E Ball
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - David StC Black
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Naresh Kumar
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
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Sumner LW, Lei Z, Nikolau BJ, Saito K. Modern plant metabolomics: advanced natural product gene discoveries, improved technologies, and future prospects. Nat Prod Rep 2015; 32:212-29. [PMID: 25342293 DOI: 10.1039/c4np00072b] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Plant metabolomics has matured and modern plant metabolomics has accelerated gene discoveries and the elucidation of a variety of plant natural product biosynthetic pathways. This review covers the approximate period of 2000 to 2014, and highlights specific examples of the discovery and characterization of novel genes and enzymes associated with the biosynthesis of natural products such as flavonoids, glucosinolates, terpenoids, and alkaloids. Additional examples of the integration of metabolomics with genome-based functional characterizations of plant natural products that are important to modern pharmaceutical technology are also reviewed. This article also provides a substantial review of recent technical advances in mass spectrometry imaging, nuclear magnetic resonance imaging, integrated LC-MS-SPE-NMR for metabolite identifications, and X-ray crystallography of microgram quantities for structural determinations. The review closes with a discussion on the future prospects of metabolomics related to crop species and herbal medicine.
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Affiliation(s)
- Lloyd W Sumner
- The Samuel Roberts Noble Foundation, Plant Biology Division, 2510 Sam Noble Parkway, Ardmore, OK, USA.
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Li L, Hur M, Lee JY, Zhou W, Song Z, Ransom N, Demirkale CY, Nettleton D, Westgate M, Arendsee Z, Iyer V, Shanks J, Nikolau B, Wurtele ES. A systems biology approach toward understanding seed composition in soybean. BMC Genomics 2015; 16 Suppl 3:S9. [PMID: 25708381 PMCID: PMC4331812 DOI: 10.1186/1471-2164-16-s3-s9] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The molecular, biochemical, and genetic mechanisms that regulate the complex metabolic network of soybean seed development determine the ultimate balance of protein, lipid, and carbohydrate stored in the mature seed. Many of the genes and metabolites that participate in seed metabolism are unknown or poorly defined; even more remains to be understood about the regulation of their metabolic networks. A global omics analysis can provide insights into the regulation of seed metabolism, even without a priori assumptions about the structure of these networks. RESULTS With the future goal of predictive biology in mind, we have combined metabolomics, transcriptomics, and metabolic flux technologies to reveal the global developmental and metabolic networks that determine the structure and composition of the mature soybean seed. We have coupled this global approach with interactive bioinformatics and statistical analyses to gain insights into the biochemical programs that determine soybean seed composition. For this purpose, we used Plant/Eukaryotic and Microbial Metabolomics Systems Resource (PMR, http://www.metnetdb.org/pmr, a platform that incorporates metabolomics data to develop hypotheses concerning the organization and regulation of metabolic networks, and MetNet systems biology tools http://www.metnetdb.org for plant omics data, a framework to enable interactive visualization of metabolic and regulatory networks. CONCLUSIONS This combination of high-throughput experimental data and bioinformatics analyses has revealed sets of specific genes, genetic perturbations and mechanisms, and metabolic changes that are associated with the developmental variation in soybean seed composition. Researchers can explore these metabolomics and transcriptomics data interactively at PMR.
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Affiliation(s)
- Ling Li
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, USA
| | - Manhoi Hur
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, USA
| | - Joon-Yong Lee
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Wenxu Zhou
- Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Zhihong Song
- Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Nick Ransom
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
| | | | - Dan Nettleton
- Department of Statistics, Iowa State University, Ames, Iowa 50011, USA
| | - Mark Westgate
- Department of Agronomy, Iowa State University, Ames, Iowa 50011, USA
| | - Zebulun Arendsee
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Vidya Iyer
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, USA
| | - Jackie Shanks
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, USA
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, USA
| | - Basil Nikolau
- Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, USA
| | - Eve Syrkin Wurtele
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Metabolic Biology, Iowa State University, Ames, Iowa 50011, USA
- Center for Biorenewable Chemicals, Iowa State University, Ames, Iowa 50011, USA
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Tanemossu SAF, Franke K, Arnold N, Schmidt J, Wabo HK, Tane P, Wessjohann LA. Rare biscoumarin derivatives and flavonoids from Hypericum riparium. PHYTOCHEMISTRY 2014; 105:171-177. [PMID: 24930002 DOI: 10.1016/j.phytochem.2014.05.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 03/05/2014] [Accepted: 05/05/2014] [Indexed: 06/03/2023]
Abstract
Hypericum riparium A. Chev. is a Cameroonian medicinal plant belonging to the family Guttiferae. Chemical investigation of the methanol extract of the stem bark of H. riparium led to the isolation of four natural products, 7,7'-dihydroxy-6,6'-biscoumarin (1), 7,7'-dihydroxy-8,8'-biscoumarin (2), 7-methoxy-6,7'-dicoumarinyl ether (3), 2'-hydroxy-5'-(7″-methoxycoumarin-6″-yl)-4'-methoxyphenylpropanoic acid (4), together with one known 7,7'-dimethoxy-6,6'-biscoumarin (5), two flavones, 2'-methoxyflavone (6) and 3'-methoxy flavone (7), and two steroids, stigmast-4-en-3-one (8) and ergosta-4,6,8,22-tetraen-3-one (9). In addition, tetradecanoic acid (10), n-pentadecanoic acid (11), hexadecanoic acid (12), cis-10-heptadecenoic acid (13), octadecanoic acid (14) campesterol (15), stigmasterol (16), β-sitosterol (17), stigmastanol (18), β-eudesmol (19), 1-hexadecanol (20), and 1-octadecanol (21) were identified by GC-MS analysis. Compound 4 consists of a phenylpropanoic acid derivative fused with a coumarin unit, while compounds 2 and 3 are rare members of C8-C8' and C7-O-C6 linked biscoumarins. Their structures were elucidated by UV, IR, extensive 1D- and 2D-NMR experiments and electrospray (ESI) high resolution mass spectrometry (MS) including detailed MS/MS studies. This is the first report on the isolation of biscoumarins from the genus Hypericum, although simple coumarin derivatives have been reported from this genus in the literature. The cytotoxic activities of compounds 2-5 were evaluated against the human prostate cancer cell line PC-3 and the colon cancer cell line HT-29. They do not exhibit any significant cytotoxic activity.
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Affiliation(s)
- Serge Alain Fobofou Tanemossu
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; Laboratory of Natural Products Chemistry, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Katrin Franke
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Jürgen Schmidt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Hippolyte Kamdem Wabo
- Laboratory of Natural Products Chemistry, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Pierre Tane
- Laboratory of Natural Products Chemistry, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany.
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