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Shi JY, Gu KH, Yang SM, Wei WH, Dai X. Effects of 6-methoxybenzoxazolinone (6-MBOA) on animals: state of knowledge and open questions. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2024; 111:45. [PMID: 39141101 DOI: 10.1007/s00114-024-01930-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 07/26/2024] [Accepted: 07/29/2024] [Indexed: 08/15/2024]
Abstract
6-methoxybenzoxazolinone (6-MBOA) is a secondary plant metabolite predominantly found in monocotyledonous plants, especially Gramineae. In damaged tissue, 2-β-D-glucopyranosyloxy-4-hydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA-Glc) is hydrolyzed to DIMBOA, which spontaneously decomposes into 6-MBOA. It is commonly detected in plants consumed by voles and livestock and can also be present in cereal-based products. Discovered in 1955, this compound is renowned for its ability to trigger animal reproduction. However, there is a lack of research on its functional and mechanistic properties, leaving much of their potential unexplored. This review aimed to comprehensively summarize the effects of 6-MBOA on animal reproduction and human health, as well as its defensive role against herbivores. Studies have shown that 6-MBOA effectively inhibits the digestion, development, growth, and reproduction of insects. 6-MBOA may act as a partial agonist of melatonin and exert a regulatory role in mammalian reproduction, resulting in either promoting or inhibiting effects. 6-MBOA has been theorized to possess anti-tumor, anti-AIDS, anti-anxiety, and weight-loss effects in humans. However, insufficient attention has been paid to its defense properties against mammalian herbivores, and the mechanisms underlying its effects on mammalian reproduction remain unclear. In addition, research on its impact on human health is still in its preliminary stages. The review emphasizes the need for further systematic and comprehensive research on 6-MBOA to fully understand its diverse functions. Elucidating the effects of 6-MBOA on animal reproduction, adaptation, and human health would advance our understanding of plant-herbivore coevolution and the influence of environmental factors on animal population dynamics. Furthermore, this knowledge could potentially promote its application in human health and animal husbandry.
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Affiliation(s)
- Jia-Yi Shi
- College of Bioscience and Biotechnology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, China
| | - Ke-Han Gu
- College of Bioscience and Biotechnology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, China
| | - Sheng-Mei Yang
- College of Bioscience and Biotechnology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, China
| | - Wan-Hong Wei
- College of Bioscience and Biotechnology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, China
| | - Xin Dai
- College of Bioscience and Biotechnology, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, China.
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Hama JR, Fomsgaard IS, Topalović O, Vestergård M. Root uptake of cereal benzoxazinoids grants resistance to root-knot nematode invasion in white clover. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 210:108636. [PMID: 38657547 DOI: 10.1016/j.plaphy.2024.108636] [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: 01/26/2024] [Revised: 04/02/2024] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
Plants synthesize a plethora of chemical defence compounds, which vary between evolutionary lineages. We hypothesize that plants evolved the ability to utilize defence compounds synthesized and released by neighbouring heterospecific plants. In two experiments, we incubated clover (Trifolium repens L.) seedlings with individual benzoxazinoid (BX) compounds (2,4-dihydroxy-1,4-benzoxazin-3-one, 2-hydroxy-1,4-benzoxazin-3-one, benzoxazolinone, and 6-methoxy- benzoxazolin-2-one), a group of bioactive compounds produced by cereals, to allow clover BX uptake. Subsequently, we transplanted the seedlings into soil and quantified BX root and shoot content and invasion of root-knot nematodes in clover roots up to 8 weeks after transplantation. We show that clover root uptake of BXs substantially enhanced clover's resistance against the root-knot nematode Meloidogyne incognita. This effect lasted up to 6 weeks after the clover roots were exposed to the BXs. BXs were absorbed by clover roots, and then translocated to the shoots. As a result of clover metabolization, we detected the parent BXs and a range of their transformation products in the roots and shoots. Based on these novel findings, we envisage that co-cultivation of crop species with complementary and transferable chemical defence systems can add to plant protection.
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Affiliation(s)
- Jawameer R Hama
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark
| | - Inge S Fomsgaard
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark
| | - Olivera Topalović
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark
| | - Mette Vestergård
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark.
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Živković A, Gođevac D, Cigić B, Polak T, Požrl T. Identification and Quantification of Selected Benzoxazinoids and Phenolics in Germinated Spelt ( Triticum spelta). Foods 2023; 12:foods12091769. [PMID: 37174307 PMCID: PMC10178788 DOI: 10.3390/foods12091769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/13/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023] Open
Abstract
In this study, we investigated the effects of germination on the secondary metabolite composition in spelt grains. Germination significantly increased the content of various metabolites in free and bound forms. Benzoxazinoids were the most important compounds in the free fraction of the 96 h germinated grains (MBOA content as the predominant compound was 277.61 ± 15.29 µg/g DW). The majority of phenolic acids were present in the bound fraction, with trans-ferulic acid as the main component, reaching 753.27 ± 95.87 µg/g DW. The often neglected cis-isomers of phenolic acids accounted for about 20% of the total phenolic acids. High levels of apigenin di-C-glycosides were found in spelt grains, and the schaftoside content was most affected by germination, increasing threefold. The accumulation of secondary metabolites significantly increased the antioxidant activity of germinated spelt. According to the results of this study, the content of most bioactive compounds was highest in spelt grains after 96 h of germination. These data suggest that germinated spelt could potentially be valuable for the production of functional foods.
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Affiliation(s)
- Andrej Živković
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, SI-1111 Ljubljana, Slovenia
| | - Dejan Gođevac
- Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia
| | - Blaž Cigić
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, SI-1111 Ljubljana, Slovenia
| | - Tomaž Polak
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, SI-1111 Ljubljana, Slovenia
| | - Tomaž Požrl
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, SI-1111 Ljubljana, Slovenia
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Nordin E, Steffensen SK, Laursen BB, Andersson SO, Johansson JE, Åman P, Hallmans G, Borre M, Stærk D, Hanhineva K, Fomsgaard IS, Landberg R. An inverse association between plasma benzoxazinoid metabolites and PSA after rye intake in men with prostate cancer revealed with a new method. Sci Rep 2022; 12:5260. [PMID: 35347164 PMCID: PMC8960836 DOI: 10.1038/s41598-022-08856-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 03/11/2022] [Indexed: 11/12/2022] Open
Abstract
Prostate cancer (PC) is a common cancer among men, and preventive strategies are warranted. Benzoxazinoids (BXs) in rye have shown potential against PC in vitro but human studies are lacking. The aim was to establish a quantitative method for analysis of BXs and investigate their plasma levels after a whole grain/bran rye vs refined wheat intervention, as well as exploring their association with PSA, in men with PC. A quantitative method for analysis of 22 BXs, including novel metabolites identified by mass spectrometry and NMR, was established, and applied to plasma samples from a randomized crossover study where patients with indolent PC (n = 17) consumed 485 g whole grain rye/rye bran or fiber supplemented refined wheat daily for 6 wk. Most BXs were significantly higher in plasma after rye (0.3–19.4 nmol/L in plasma) vs. refined wheat (0.05–2.9 nmol/L) intake. HBOA-glc, 2-HHPAA, HBOA-glcA, 2-HPAA-glcA were inversely correlated to PSA in plasma (p < 0.04). To conclude, BXs in plasma, including metabolites not previously analyzed, were quantified. BX metabolites were significantly higher after rye vs refined wheat consumption. Four BX-related metabolites were inversely associated with PSA, which merits further investigation.
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Affiliation(s)
- Elise Nordin
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 39, Gothenburg, Sweden.
| | - Stine K Steffensen
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark.
| | - Bente B Laursen
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark
| | - Sven-Olof Andersson
- Department of Urology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Jan-Erik Johansson
- Department of Urology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Per Åman
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Box 7015, Uppsala, Sweden
| | - Göran Hallmans
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Michael Borre
- Department of Urology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark
| | - Dan Stærk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - Kati Hanhineva
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 39, Gothenburg, Sweden.,Department of Life Technologies, Food Chemistry and Food Development Unit, 20520, Turku, Finland.,School of Medicine, Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210, Kuopio, Finland
| | - Inge S Fomsgaard
- Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark.
| | - Rikard Landberg
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 39, Gothenburg, Sweden. .,Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
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Zorrilla JG, Rial C, Cabrera D, Molinillo JMG, Varela RM, Macías FA. Pharmacological Activities of Aminophenoxazinones. Molecules 2021; 26:3453. [PMID: 34200139 PMCID: PMC8201375 DOI: 10.3390/molecules26113453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/25/2021] [Accepted: 05/28/2021] [Indexed: 01/21/2023] Open
Abstract
Aminophenoxazinones are degradation products resulting from the metabolism of different plant species, which comprise a family of natural products well known for their pharmacological activities. This review provides an overview of the pharmacological properties and applications proved by these compounds and their structural derivatives during 2000-2021. The bibliography was selected according to our purpose from the references obtained in a SciFinder database search for the Phx-3 structure (the base molecule of the aminophenoxazinones). Compounds Phx-1 and Phx-3 are among the most studied, especially as anticancer drugs for the treatment of gastric and colon cancer, glioblastoma and melanoma, among others types of relevant cancers. The main information available in the literature about their mechanisms is also described. Similarly, antibacterial, antifungal, antiviral and antiparasitic activities are presented, including species related directly or indirectly to significant diseases. Therefore, we present diverse compounds based on aminophenoxazinones with high potential as drugs, considering their levels of activity and few adverse effects.
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Affiliation(s)
| | | | | | | | | | - Francisco A. Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science, University of Cadiz, 11510 Puerto Real, Cádiz, Spain; (J.G.Z.); (C.R.); (D.C.); (J.M.G.M.); (R.M.V.)
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Bhattarai B, Steffensen SK, Gregersen PL, Kristensen HL, Fomsgaard IS. Stepwise mass spectrometry-based approach for confirming the presence of benzoxazinoids in herbs and vegetables. PHYTOCHEMICAL ANALYSIS : PCA 2021; 32:283-297. [PMID: 32688439 DOI: 10.1002/pca.2973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
INTRODUCTION Benzoxazinoids (BXs) are plant phytochemicals that have both defensive properties in plants and therapeutic effects in humans. The presence of BXs has been largely studied in the Poaceae family (monocots). To study the presence or absence of BXs in dicotyledons and monocotyledons outside the Poaceae family, parts of 24 plant species at several growth stages were selected for analysis, some of which were already known to contain BXs. OBJECTIVES To devise a stepwise mass spectrometry-based approach for confirming the presence of BXs in plant samples, and to use the method to explore the status of BXs in selected plant species. EXPERIMENTAL Plant samples were extracted using accelerated solvent extraction and analysed using triple-quadrupole liquid chromatography-mass spectrometry. RESULTS The use of different columns, double mass transitions, and ion ratios proved to be a robust tool for confirming the presence of BXs in different plant species. By this method, the presence of BXs was confirmed in three of the 24 species. Double-hexose forms of BXs, which have not been reported before in dicotyledons, were confirmed to be present in the dicotyledon plants Acanthus mollis and Lamium galeobdolon, and the presence of BXs in the seeds of Consolida orientalis is reported for the first time here. High concentrations of BXs were found in the aerial parts of Acanthus mollis and Lamium galeobdolon, at 20 and 32 μmol/g plant dry weight, respectively. CONCLUSIONS The stepwise approach described in this work confirmed the presence of BXs in new samples.
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Affiliation(s)
- Bina Bhattarai
- Department of Agroecology, Aarhus University, Slagelse, Denmark
| | | | - Per L Gregersen
- Department of Agroecology, Aarhus University, Slagelse, Denmark
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Tang Y, Zhu Y, Sang S. A Novel LC-MS Based Targeted Metabolomic Approach to Study the Biomarkers of Food Intake. Mol Nutr Food Res 2020; 64:e2000615. [PMID: 32997396 DOI: 10.1002/mnfr.202000615] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/27/2020] [Indexed: 12/25/2022]
Abstract
SCOPE In this work, an integrated strategy is developed for rapid discovery, precise identification, and automated quantification for the biomarkers of food intake (BFIs) for specific food exposure using an ultra-high-pressure liquid chromatography-high-resolution mass spectrometry (MS) based targeted metabolomics approach. METHODS AND RESULTS Using whole grain (WG) wheat intake as an example, the combination of paired mass distance networking and parallel reaction monitoring analysis is applied to selectively extract and identify WG metabolites in human urine samples. As a result, a total of 76 wheat phytochemical-derived metabolites, including 17 alkylresorcinol metabolites, 20 benzoxazinoid derivatives, and 39 phenolic acid metabolites are identified. Subsequently, a MS spectral database consisting of the identified metabolites is created by mzVault. The characteristics of identified metabolites from the database are incorporated into the TraceFinder software to establish a quantification platform. Using a standardized urine sample, the authors are able to simultaneously quantify both free and conjugated (sulfate and glucuronide) WG wheat metabolites in real samples without further enzymatic hydrolysis, which is validated by using authentic standards to quantify these metabolites. CONCLUSION This novel strategy opens the window to study the biomarkers of specific food intake and make it feasible to validate the BFIs in large-scale human studies.
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Affiliation(s)
- Yao Tang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University, North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Yingdong Zhu
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University, North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Shengmin Sang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University, North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
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de Sousa G, Lima WG, Dos Santos FJ, Macías FA, Molinillo JMG, Teixeira-Neto RG, de Siqueira JM, da Silva ES. Toxicity and Anti-promastigote Activity of Benzoxazinoid Analogs Against Leishmania (Viannia) braziliensis and Leishmania (Leishmania) infantum. Adv Pharm Bull 2019; 10:119-124. [PMID: 32002370 PMCID: PMC6983991 DOI: 10.15171/apb.2020.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/25/2019] [Accepted: 09/02/2019] [Indexed: 11/12/2022] Open
Abstract
Purpose: Here, we aim to evaluate the antileishmanial activity of compounds with a benzoxazinoid (BX) skeleton, previously synthesized by our group, against Leishmania (Viannia) braziliensis and Leishmania (Leishmania) infantum promastigotes.
Methods: Anti-promastigote activity, as well as cytotoxicity, were determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric assays. The selectivity index (SI) for each compound was calculated using a ratio of the cytotoxicity of compounds and the geometric mean (GM) of antileishmanial concentrations to each species tested. The comparisons between groups were carried out using a t test or analysis of variance (one-way ANOVA). A P value of less than 0.05 was considered significant.
Results: All the compounds tested were active, with IC50 falling between 92±6.19 µg/mL and 238±6.57 µg/mL for L. braziliensis, and 89±6.43 µg/mL and 188±3.58 µg/mL against L. infantum. Bex2, Bex3, Pyr1, Pyr2, and Pyr4 were compounds that showed activity similar to the drug Glucantime®, exhibited low cytotoxicity against splenic hamster cells (CC50 raging between >400 and 105.7±2.26 µg/mL) and had favorable selectivity indices (SI 1.12 to 3.96).
Conclusion: The analogs in question are promising prototypes for the pharmaceutical development of novel, safer and more effective leishmanicidal agents.
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Affiliation(s)
- Gilberto de Sousa
- Laboratório de Parasitologia e Doenças Parasitárias, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
| | - William Gustavo Lima
- Laboratório de Microbiologia Médica, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
| | - Flávio José Dos Santos
- Laboratório de Farmacognosia/Química de Produtos Naturais, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
| | - Francisco A Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science, University of Cadiz, Puerto Real (Cádiz), Spain
| | - José María González Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus CEIA3, School of Science, University of Cadiz, Puerto Real (Cádiz), Spain
| | - Rafael Gonçalves Teixeira-Neto
- Laboratório de Parasitologia e Doenças Parasitárias, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
| | - João Máximo de Siqueira
- Laboratório de Farmacognosia/Química de Produtos Naturais, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
| | - Eduardo Sérgio da Silva
- Laboratório de Parasitologia e Doenças Parasitárias, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João Del-Rei (UFSJ), Divinopolis, MG, Brazil
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Macías FA, Mejías FJ, Molinillo JM. Recent advances in allelopathy for weed control: from knowledge to applications. PEST MANAGEMENT SCIENCE 2019; 75:2413-2436. [PMID: 30684299 DOI: 10.1002/ps.5355] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/10/2019] [Accepted: 01/19/2019] [Indexed: 05/27/2023]
Abstract
Allelopathy is the biological phenomenon of chemical interactions between living organisms in the ecosystem, and must be taken into account in addressing pest and weed problems in future sustainable agriculture. Allelopathy is a multidisciplinary science, but in some cases, aspects of its chemistry are overlooked, despite the need for a deep knowledge of the chemical structural characteristics of allelochemicals to facilitate the design of new herbicides. This review is focused on the most important advances in allelopathy, paying particular attention to the design and development of phenolic compounds, terpenoids and alkaloids as herbicides. The isolation of allelochemicals is mainly addressed, but other aspects such as the analysis and activities of derivatives or analogs are also covered. Furthermore, the use of allelopathy in the fight against parasitic plants is included. The past 12 years have been a prolific period for publications on allelopathy. This critical review discusses future research areas in this field and the state of the art is analyzed from the chemist's perspective. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Francisco A Macías
- Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
| | - Francisco Jr Mejías
- Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
| | - José Mg Molinillo
- Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
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Kudjordjie EN, Sapkota R, Steffensen SK, Fomsgaard IS, Nicolaisen M. Maize synthesized benzoxazinoids affect the host associated microbiome. MICROBIOME 2019; 7:59. [PMID: 30975184 PMCID: PMC6460791 DOI: 10.1186/s40168-019-0677-7] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/28/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Plants actively shape their associated microbial communities by synthesizing bio-active substances. Plant secondary metabolites are known for their signaling and plant defense functions, yet little is known about their overall effect on the plant microbiome. In this work, we studied the effects of benzoxazinoids (BXs), a group of secondary metabolites present in maize, on the host-associated microbial structure. Using BX knock-out mutants and their W22 parental lines, we employed 16S and ITS2 rRNA gene amplicon analysis to characterize the maize microbiome at early growth stages. RESULTS Rhizo-box experiment showed that BXs affected microbial communities not only in roots and shoots, but also in the rhizosphere. Fungal richness in roots was more affected by BXs than root bacterial richness. Maize genotype (BX mutants and their parental lines) as well as plant age explained both fungal and bacterial community structure. Genotypic effect on microbial communities was stronger in roots than in rhizosphere. Diverse, but specific, microbial taxa were affected by BX in both roots and shoots, for instance, many plant pathogens were negatively correlated to BX content. In addition, a co-occurrence analysis of the root microbiome revealed that BXs affected specific groups of the microbiome. CONCLUSIONS This study provides insights into the role of BXs for microbial community assembly in the rhizosphere and in roots and shoots. Coupling the quantification of BX metabolites with bacterial and fungal communities, we were able to suggest a gatekeeper role of BX by showing its correlation with specific microbial taxa and thus providing insights into effects on specific fungal and bacterial taxa in maize roots and shoots. Root microbial co-occurrence networks revealed that BXs affect specific microbial clusters.
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Affiliation(s)
- Enoch Narh Kudjordjie
- Faculty of Science and Technology, Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200 Slagelse, Denmark
| | - Rumakanta Sapkota
- Faculty of Science and Technology, Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200 Slagelse, Denmark
| | - Stine K. Steffensen
- Faculty of Science and Technology, Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200 Slagelse, Denmark
| | - Inge S. Fomsgaard
- Faculty of Science and Technology, Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200 Slagelse, Denmark
| | - Mogens Nicolaisen
- Faculty of Science and Technology, Department of Agroecology, Aarhus University, Forsøgsvej 1, 4200 Slagelse, Denmark
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Tanwir F, Dionisio G, Adhikari KB, Fomsgaard IS, Gregersen PL. Biosynthesis and chemical transformation of benzoxazinoids in rye during seed germination and the identification of a rye Bx6-like gene. PHYTOCHEMISTRY 2017; 140:95-107. [PMID: 28472715 DOI: 10.1016/j.phytochem.2017.04.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/20/2017] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
Benzoxazinoids are secondary metabolites with plant defense properties and possible health-promoting effects in humans. In this study, the transcriptional activity of ScBx genes (ScBx1-ScBx5; ScBx6-like), involved in benzoxazinoid biosynthesis, was analyzed during germination and early seedling development in rye. Our results showed that ScBx genes had highest levels of expression at 24-30 h after germination, followed by a decrease at later stages. For ScBx1-ScBx5 genes expression was higher in shoots compared with root tissues and vice versa for ScBx6-like gene transcripts. Moreover, methylated forms of benzoxazinoids accumulated in roots rather than in shoots during seedling development, in particular reaching high levels of HMBOA-glc in roots. Chemical profiles of benzoxazinoid accumulation in the developing seedling reflected the combined effects of de novo biosynthesis of the compounds as well as the turnover of compounds either pre-stored in the embryo or de novo biosynthesized. Bioinformatic analysis, together with the differential distribution of ScBx6-like transcripts in root and shoot tissues, suggested the presence of a ZmBx6 homolog encoding a 2-oxoglutarate dependent dehydrogenase in rye. The ScBx6-like cDNA was expressed in E. coli for functional characterization in vitro. LC-MS/MS analysis showed that the purified enzyme was responsible for the oxidation of DIBOA-glc into TRIBOA-glc, strongly suggesting the ScBX6-like enzyme in rye to be a functional ortholog of maize ZmBX6.
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Affiliation(s)
- Fariha Tanwir
- Department of Molecular Biology and Genetics, Aarhus University, Denmark
| | - Giuseppe Dionisio
- Department of Molecular Biology and Genetics, Aarhus University, Denmark
| | | | | | - Per L Gregersen
- Department of Molecular Biology and Genetics, Aarhus University, Denmark.
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Steffensen SK, Pedersen HA, Adhikari KB, Laursen BB, Jensen C, Høyer S, Borre M, Pedersen HH, Borre M, Edwards D, Fomsgaard IS. Benzoxazinoids in Prostate Cancer Patients after a Rye-Intensive Diet: Methods and Initial Results. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:8235-8245. [PMID: 27718574 DOI: 10.1021/acs.jafc.6b03765] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Rye bread contains high amounts of benzoxazinoids, and in vitro studies have shown suppressive effects of selected benzoxazinoids on prostate cancer cells. Thus, research into benzoxazinoids as possible suppressors of prostate cancer is demanded. A pilot study was performed in which ten prostate cancer patients received a rye-enriched diet 1 week prior to prostatectomy. Plasma and urine samples were collected pre- and postintervention. Ten prostate biopsies were obtained from each patient and histologically evaluated. The biopsies exhibited concentrations above the detection limit of seven benzoxazinoids ranging from 0.15 to 10.59 ng/g tissue. An OPLS-DA analysis on histological and plasma concentrations of benzoxazinoids classified the subjects into two clusters. A tendency of higher benzoxazinoid concentrations toward the benign group encourages further investigations. Benzoxazinoids were quantified by an optimized LC-MS/MS method, and matrix effects were evaluated. At low concentrations in biopsy and plasma matrices the matrix effect was concentration-dependent and nonlinear. For the urine samples the general matrix effects were small but patient-dependent.
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Affiliation(s)
- Stine K Steffensen
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Hans A Pedersen
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Khem B Adhikari
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Bente B Laursen
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Claudia Jensen
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Søren Høyer
- Department of Pathology, Aarhus University Hospital , Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - Michael Borre
- Department of Urology, Aarhus University Hospital , Palle Juul-Jensens Boulevard 99, DK-8200 Aarhus N, Denmark
| | - Helene H Pedersen
- Department of Urology, Aarhus University Hospital , Palle Juul-Jensens Boulevard 99, DK-8200 Aarhus N, Denmark
| | - Mette Borre
- Department of Medicine V (Hepatology and Gastroenterology), Aarhus University Hospital , Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - David Edwards
- Department of Molecular Biology and Genetics, Aarhus University , Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Inge S Fomsgaard
- Department of Agroecology, Aarhus University , Forsøgsvej 1, DK-4200 Slagelse, Denmark
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Characterizing Blood Metabolomics Profiles Associated with Self-Reported Food Intakes in Female Twins. PLoS One 2016; 11:e0158568. [PMID: 27355821 PMCID: PMC4927065 DOI: 10.1371/journal.pone.0158568] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 06/19/2016] [Indexed: 12/15/2022] Open
Abstract
Using dietary biomarkers in nutritional epidemiological studies may better capture exposure and improve the level at which diet-disease associations can be established and explored. Here, we aimed to identify and evaluate reproducibility of novel biomarkers of reported habitual food intake using targeted and non-targeted metabolomic blood profiling in a large twin cohort. Reported intakes of 71 food groups, determined by FFQ, were assessed against 601 fasting blood metabolites in over 3500 adult female twins from the TwinsUK cohort. For each metabolite, linear regression analysis was undertaken in the discovery group (excluding MZ twin pairs discordant [≥1 SD apart] for food group intake) with each food group as a predictor adjusting for age, batch effects, BMI, family relatedness and multiple testing (1.17x10-6 = 0.05/[71 food groups x 601 detected metabolites]). Significant results were then replicated (non-targeted: P<0.05; targeted: same direction) in the MZ discordant twin group and results from both analyses meta-analyzed. We identified and replicated 180 significant associations with 39 food groups (P<1.17x10-6), overall consisting of 106 different metabolites (74 known and 32 unknown), including 73 novel associations. In particular we identified trans-4-hydroxyproline as a potential marker of red meat intake (0.075[0.009]; P = 1.08x10-17), ergothioneine as a marker of mushroom consumption (0.181[0.019]; P = 5.93x10-22), and three potential markers of fruit consumption (top association: apple and pears): including metabolites derived from gut bacterial transformation of phenolic compounds, 3-phenylpropionate (0.024[0.004]; P = 1.24x10-8) and indolepropionate (0.026[0.004]; P = 2.39x10-9), and threitol (0.033[0.003]; P = 1.69x10-21). With the largest nutritional metabolomics dataset to date, we have identified 73 novel candidate biomarkers of food intake for potential use in nutritional epidemiological studies. We compiled our findings into the DietMetab database (http://www.twinsuk.ac.uk/dietmetab-data/), an online tool to investigate our top associations.
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