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Thakur K, Kumari C, Zadokar A, Sharma P, Sharma R. Physiological and omics-based insights for underpinning the molecular regulation of secondary metabolite production in medicinal plants: UV stress resilience. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108060. [PMID: 37897892 DOI: 10.1016/j.plaphy.2023.108060] [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: 06/29/2023] [Revised: 09/15/2023] [Accepted: 09/25/2023] [Indexed: 10/30/2023]
Abstract
Despite complex phytoconstituents, the commercial potential of medicinal plants under ultraviolet (UV) stress environment hasn't been fully comprehended. Due to sessile nature, these plants are constantly exposed to damaging radiation, which disturbs their natural physiological and biochemical processes. To combat with UV stress, plants synthesized several small organic molecules (natural products of low molecular mass like alkaloids, terpenoids, flavonoids and phenolics, etc.) known as plant secondary metabolites (PSMs) that come into play to counteract the adverse effect of stress. Plants adapted a stress response by organizing the expression of several genes, enzymes, transcription factors, and proteins involved in the synthesis of chemical substances and by making the signaling cascade (a series of chemical reactions induced by a stimulus within a biological cell) flexible to boost the defensive response. To neutralize UV exposure, secondary metabolites and their signaling network regulate cellular processes at the molecular level. Conventional breeding methods are time-consuming and difficult to reveal the molecular pattern of the stress tolerance medicinal plants. Acquiring in-depth knowledge of the molecular drivers behind the defensive mechanism of medicinal plants against UV radiation would yield advantages (economical and biological) that will bring prosperity to the burgeoning world's population. Thus, this review article emphasized the comprehensive information and clues to identify several potential genes, transcription factors (TFs), proteins, biosynthetic pathways, and biological networks which are involved in resilience mechanism under UV stress in medicinal plants of high-altitudes.
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Affiliation(s)
- Kamal Thakur
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Chanchal Kumari
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Ashwini Zadokar
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Parul Sharma
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Rajnish Sharma
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India.
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De Palma N, Yendo ACA, Vilasboa J, Chacon DS, Fett-Neto AG. Biochemical responses in leaf tissues of alkaloid producing Psychotria brachyceras under multiple stresses. JOURNAL OF PLANT RESEARCH 2023; 136:397-412. [PMID: 36809401 DOI: 10.1007/s10265-023-01441-z] [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: 11/23/2022] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Under natural conditions plants are generally subjected to complex scenarios of combined or sequential environmental stresses. Among the various components of plant biochemistry modulated by abiotic variables, a pivotal role is played by antioxidant systems, including specialized metabolites and their interaction with central pathways. To help address this knowledge gap, a comparative analysis of metabolic changes in leaf tissues of the alkaloid accumulating plant Psychotria brachyceras Müll Arg. under individual, sequential, and combined stress conditions was carried out. Osmotic and heat stresses were evaluated. Protective systems (accumulation of the major antioxidant alkaloid brachycerine, proline, carotenoids, total soluble protein, and activity of the enzymes ascorbate peroxidase and superoxide dismutase) were measured in conjunction with stress indicators (total chlorophyll, ChA/ChB ratio, lipid peroxidation, H2O2 content and electrolyte leakage). Metabolic responses had a complex profile in sequential and combined stresses compared to single ones, being also modified over time. Different stress application schemes affected alkaloid accumulation in distinct ways, exhibiting similar profile to proline and carotenoids, constituting a complementary triad of antioxidants. These complementary non-enzymatic antioxidant systems appeared to be essential for mitigating stress damage and re-establishing cellular homeostasis. The data herein provides clues that may aid the development of a key component framework of stress responses and their appropriate balance to modulate tolerance and yield of target specialized metabolites.
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Affiliation(s)
- Nicolás De Palma
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Anna Carolina Alves Yendo
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
- Plant Physiology Laboratory, Center for Biotechnology, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Johnatan Vilasboa
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Daisy Sotero Chacon
- Pharmacognosy Laboratory, Department of Pharmacy, Federal University of Rio Grande do Norte, CP 59000, Natal, RN, 59012-570, Brazil
| | - Arthur Germano Fett-Neto
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil.
- Plant Physiology Laboratory, Center for Biotechnology, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil.
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Formagio ASN, Vilegas W, Volobuff CRF, Kassuya CAL, Cardoso CAL, Pereira ZV, Silva RMMF, Dos Santos Yamazaki DA, de Freitas Gauze G, Manfron J, Marangoni JA. Exploration of essential oil from Psychotria poeppigiana as an anti-hyperalgesic and anti-acetylcholinesterase agent: Chemical composition, biological activity and molecular docking. JOURNAL OF ETHNOPHARMACOLOGY 2022; 296:115220. [PMID: 35358624 DOI: 10.1016/j.jep.2022.115220] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 02/17/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Leaves from Psychotria poeppigiana Müll. Arg. (accepted as Palicourea tomentosa (Aubl.) Borhidi), Rubiaceae, has traditionally been used in medicine for treatments of inflammation and pain; Synonymously, Cephaelis elata for the treatment of dementia; However, few scientific studies have been evidence demonstrating this activity. AIM OF THE STUDY The aim of this study was to investigate the chemical composition of P. poeppigiana essential oil obtained from leaves (EOPP) and its antioxidant, anti-inflammatory and acetylcholinesterase (AChE) activities. Molecular docking simulations were carried out with the main constituents. MATERIALS AND METHODS EOPP (hydrodistillation) was analysed by gas chromatography-mass spectrometry (GC-MS). The fractionation of EOPP afforded germacrene D and bicyclogermacrene. The antioxidant activity of EOPP was determined by MDA assay. The inflammatory parameters were evaluated using CFA model (with paw edema, mechanical, thermal hyperalgesia, MPO and NAG) in EOPP (30, 100 and 300 mg/kg), germacrene D and bicyclogermacrene (30 mg/kg). The AChE inhibition was evaluated in rat brain structures and molecular docking simulations were carried out using Autodock v.4.3.2. RESULTS GC-MS analysis identified 19 compounds, and the major compounds were germacrene D (29.38%) and bicyclogermacrene (25.21%). EOPP exhibited high antioxidant capacity (IC50 = 12.78 ± 1.36 μg/mL). All the tested doses of EOPP and both major constituents significantly inhibited cold and mechanical hyperalgesia and significantly blocked the increase in MPO activity 24 h after the CFA injection. There was significant AChE inhibition by EOPP and germacrene D in the cerebral cortex and hippocampus (>50%). Enzyme-ligand molecular modelling showed that the major constituents of EOPP interacted differently with AChE. CONCLUSIONS The chemical compounds of the essential oil from the leaves of P. poeppigiana is based mainly on terpenes, the sesquiterpenes germacrene D (29.38%) and bicyclogermacrene (25.21%) being the major compounds. EOPP presented antioxidant, anti-inflammatory and anti-acetylcholinesterase (AChE) activities. Besides, enzyme-ligand molecular modelling showed the EOPP may act as an anti-hyperalgesic and AChE inhibitory agent. Taken together, these results might be in accordance with if folk use for pain- and inflammation-related symptoms.
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Affiliation(s)
| | - Wagner Vilegas
- Institute of Biosciences, UNESP - São Paulo State University, São Vicente, SP, Brazil.
| | | | | | | | - Zefa Valdevina Pereira
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil.
| | | | | | | | - Jane Manfron
- Postgraduate Program in Pharmaceutical Sciences, State University of Ponta Grossa, Ponta Grossa, PR, Brazil.
| | - Janaine Alberto Marangoni
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil.
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Chemotaxonomy and Antibacterial Activity of the Extracts and Chemical Constituents of Psychotria succulenta Hiern. (Rubiaceae). BIOMED RESEARCH INTERNATIONAL 2022; 2022:7856305. [PMID: 35757466 PMCID: PMC9217553 DOI: 10.1155/2022/7856305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/26/2022] [Accepted: 06/03/2022] [Indexed: 11/18/2022]
Abstract
The use of natural products for medicinal purposes is becoming more and more common nowadays, as evidenced by the presence in plants of secondary metabolites with different potentials such as antioxidant and antibacterial properties. We evaluated in this work the antimicrobial activities of the extracts and some isolated compounds from the seeds of Psychotria succulenta Hiern. (Rubiaceae), a Cameroonian medicinal plant traditionally used to cure microbial infections. The ethanol extract was prepared by maceration and extracted with ethyl acetate and n-butanol. The EtOAc (m = 168 g) and n-BuOH (m = 20 g) extracts were further fractionated by silica gel column chromatography to isolation of compounds. Their structures were elucidated by spectroscopic analysis and by comparison with published data. The antibacterial activity of extracts and compounds was assessed by evaluating the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against pathogenic bacteria. Thirteen compounds including four alkaloids (veprisine (1), naucleofficine III (2), vepridimerine B (3), and vepridimerine C (4)), three triterpenes (barbinervic acid (5), 3-O-α-L-rhamnopyranosyl quinovic acid (6), and oleanolic acid (7)), one steroid (β-sitosterol-3-O-β-D-glucopyranoside (8)), four phenolic compounds (scopoletin (9), gallic acid (10), quercetin-3-O-β-D-glucopyranoside (11), and kaempferol 3-O-α-L-rhamnopyranoside-7-O-α-L-rhamnopyranoside (12)), and one iridoid (borreriagenin (13)) were isolated from the EtOAc and n-BuOH extracts. These compounds were identified by 1D and 2D NMR combined analysis as well as by melting point comparison. The EtOH, EtOAc, and n-BuOH extracts exhibited significant antibacterial activities (MIC = 32‐128 μg/mL; MBC = 64‐256 μg/mL) against Staphylococcus aureus (Gram-positive bacterium), Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumonia (Gram-negative bacteria). Among the isolated compounds, scopoletin (9) showed a moderate activity against Klebsiella pneumoniae with MIC and MBC values of 16 μg/mL and 32 μg/mL, respectively. It appears that, chemotaxonomically, some of the isolated compounds have already been obtained from the genus Psychotria but to the best of our knowledge, this is the first report on the phytochemical investigation of P. succulenta. Although many other studies need to be achieved, our results support the use of P. succulenta in traditional medicine to cure infectious diseases particularly those caused by the tested bacteria.
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Macáková K, Afonso R, Saso L, Mladěnka P. The influence of alkaloids on oxidative stress and related signaling pathways. Free Radic Biol Med 2019; 134:429-444. [PMID: 30703480 DOI: 10.1016/j.freeradbiomed.2019.01.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/16/2019] [Accepted: 01/21/2019] [Indexed: 12/19/2022]
Abstract
Alkaloids have always attracted scientific interest due to either their positive or negative effects on human beings. This review aims to summarize their antioxidant effects by both classical in vitro scavenging assay and at the cellular level. Since most in vitro studies used the DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging assay, the results from those studies are summed up in the first part of the article. In the second part, available data on the effect of alkaloids on NADPH-oxidase, the key enzyme for reactive oxygen species production, at the cellular level, are summarized. More than 130 alkaloids were tested by DPPH assay. However, due to methodological differences, a direct comparison is hardly possible. It can be at least concluded that some of them were either similar to or even more active than standard antioxidants and the number of aromatic hydroxyl groups seems to be the major determinant for the activity. The data on inhibition of NADPH-oxidase activity by alkaloids demonstrated that there is little relationship to the DPPH assay. The mechanism seems to be based on inhibition of synthesis, activation or translocation of NADPH-oxidase subunits. In some alkaloids, activation of the nuclear factor Nrf2 pathway was documented to be the grounds for inhibition of NADPH-oxidase. Interestingly, many alkaloids can behave both as anti-oxidants and pro-oxidants depending on conditions and pro-oxidation might be the reason for activation of Nrf2. Available data on other "antioxidant" transcription factors FOXOs and PPARs are also mentioned.
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Affiliation(s)
- Kateřina Macáková
- Department of Pharmaceutical Botany, Charles University, Faculty of Pharmacy in Hradec Králové, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.
| | - Rita Afonso
- Department of Pharmacology and Toxicology, Charles University, Faculty of Pharmacy in Hradec Králové, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Piazzale Aldo Moro 5, Rome, Italy.
| | - Přemysl Mladěnka
- Department of Pharmacology and Toxicology, Charles University, Faculty of Pharmacy in Hradec Králové, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.
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Božović M, Ragno R. Calamintha nepeta (L.) Savi and its Main Essential Oil Constituent Pulegone: Biological Activities and Chemistry. Molecules 2017; 22:E290. [PMID: 28216606 PMCID: PMC6155702 DOI: 10.3390/molecules22020290] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 02/06/2017] [Indexed: 11/17/2022] Open
Abstract
Medicinal plants play an important role in the treatment of a wide range of diseases, even if their chemical constituents are not always completely recognized. Observations on their use and efficacy significantly contribute to the disclosure of their therapeutic properties. Calamintha nepeta (L.) Savi is an aromatic herb with a mint-oregano flavor, used in the Mediterranean areas as a traditional medicine. It has an extensive range of biological activities, including antimicrobial, antioxidant and anti-inflammatory, as well as anti-ulcer and insecticidal properties. This study aims to review the scientific findings and research reported to date on Calamintha nepeta (L.) Savi that prove many of the remarkable various biological actions, effects and some uses of this species as a source of bioactive natural compounds. On the other hand, pulegone, the major chemical constituent of Calamintha nepeta (L.) Savi essential oil, has been reported to exhibit numerous bioactivities in cells and animals. Thus, this integrated overview also surveys and interprets the present knowledge of chemistry and analysis of this oxygenated monoterpene, as well as its beneficial bioactivities. Areas for future research are suggested.
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Affiliation(s)
- Mijat Božović
- Rome Center for Molecular Design, Department of Drug Chemistry and Technology, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Rino Ragno
- Rome Center for Molecular Design, Department of Drug Chemistry and Technology, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
- Alchemical Dynamics s.r.l., 00125 Rome, Italy.
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de Carvalho A, de Carvalho M, Braz-Filho R, Vieira I. Psychotria Genus. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2016. [DOI: 10.1016/b978-0-444-63602-7.00007-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Sudžuković N, Schinnerl J, Brecker L. Phytochemical meanings of tetrahydro-β-carboline moiety in strictosidine derivatives. Bioorg Med Chem 2015; 24:588-95. [PMID: 26749326 DOI: 10.1016/j.bmc.2015.12.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 01/15/2023]
Abstract
Synthesis of 13 different tetrahydro-β-carbolines (THBC) was accomplished by applying the Pictet-Spengler reaction with seven aldehydes, which have been coupled with tryptamine (6) and l-tryptophan methyl ester (7), respectively. The resulting products represent analogues of strictosidine (1) and carboxystrictosidine (5). They were investigated with respect to possible effects on herbivores in feeding bioassays upon the generalist Spodoptera littoralis. Maximum inhibition averages were 42% after four and 46% after six days for the most effective product (19) at 1000ppm. Additionally, the frass of this particular bioassay was investigated via HPLC-UV for THBC digestion. All synthesized THBCs were also tested for their radical scavenger activity by monitoring their interaction with 2,2-diphenyl-1-picrylhydrazyl (DPPH). Compounds 16-20, 24 and 25 exhibited radical scavenging activity, ranging from 50% to 74% compared to that of α-tocopherol. All results were discussed with respect to possible contributions of tetrahydro-β-carboline moieties in bioactivities of strictosidine (1) and its biodegradation products.
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Affiliation(s)
- Nicole Sudžuković
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Wien, Austria
| | - Johann Schinnerl
- Chemodiversity Research Group, Division of Systematic and Evolutionary Botany, University of Vienna, Rennweg 14, A-1030 Wien, Austria
| | - Lothar Brecker
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Wien, Austria.
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Porto DD, Matsuura HN, Vargas LRB, Henriques AT, Fett-Neto AG. Shoot Accumulation Kinetics and Effects on Herbivores of the Wound-Induced Antioxidant Indole Alkaloid Brachycerine of Psychotria brachyceras. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A major shoot-specific monoterpene indole alkaloid produced by Psychotria brachyceras, brachycerine, is regulated by either wounding or jasmonate application. Highest concentrations of the alkaloid are found in inflorescences, suggesting a defence role. Brachycerine has antimutagenic and antioxidant properties, capable of quenching singlet oxygen, hydroxyl radical, and superoxide. This study aimed at characterizing the putative role of brachycerine in P. brachyceras responses to wounding and herbivory. Damage to leaves increased the content of brachycerine locally. Wounding did not affect phenolics content in P. brachyceras leaves, and no tannins were detected in the species. In generalist herbivore bioassays, neither brachycerine nor P. brachyceras extracts showed toxic effects. In vivo hydrogen peroxide staining assay showed less wound-generated peroxide accumulation in alkaloid treated tissues. This pattern was confirmed in quantitative assays measuring tissue hydrogen peroxide concentrations. Data indicate that brachycerine is not a herbivore deterrent, but rather an indirect chemical defence, modulating oxidative stress caused by mechanical damage.
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Affiliation(s)
- Diogo D. Porto
- Plant Physiology Laboratory, Center for Biotechnology and Department of Botany, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Hélio N. Matsuura
- Plant Physiology Laboratory, Center for Biotechnology and Department of Botany, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Lúcia R. B. Vargas
- Biotechnology Institute, Caxias do Sul University, Caxias do Sul, Brazil
| | - Amélia T. Henriques
- Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Arthur G. Fett-Neto
- Plant Physiology Laboratory, Center for Biotechnology and Department of Botany, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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do Nascimento NC, Menguer PK, Henriques AT, Fett-Neto AG. Accumulation of brachycerine, an antioxidant glucosidic indole alkaloid, is induced by abscisic acid, heavy metal, and osmotic stress in leaves of Psychotria brachyceras. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 73:33-40. [PMID: 24045228 DOI: 10.1016/j.plaphy.2013.08.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 08/21/2013] [Indexed: 05/10/2023]
Abstract
Psychotria brachyceras Muell. Arg. produces the antioxidant monoterpene indole alkaloid (MIA) brachycerine, which, besides retaining a glucose residue, has its terpenoid moiety derived not from secologanin, but probably from epiloganin, representing a new subclass of MIAs. In this work we showed that osmotic stress agents, such as sodium chloride, sorbitol and polyethylene glycol (PEG), induced brachycerine accumulation in leaf disks of P. brachyceras. Other oxidative stress inducers, such as exposure to aluminum and silver, also increased brachycerine content. Abscisic acid (ABA) treatment was shown to increase brachycerine yield, suggesting its involvement in brachycerine induction during osmotic stress. Ascorbate peroxidase activity was induced in PEG-treated leaf disks, whereas superoxide dismutase (SOD) activity remained unaltered. Assays with specific inhibitors of the cytosolic mevalonate (MVA) and plastidic 2-C-methyl-D-erythritol 4-phosphate (MEP) pathways showed that the terpenoid moiety of brachycerine derived predominantly from the MEP pathway. These results suggest a potential involvement of brachycerine in plant defense against osmotic/oxidative stress damage, possibly contributing to detoxification of hydroxyl radical and superoxide anion as a SOD-like molecule.
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Affiliation(s)
- Naíla Cannes do Nascimento
- Graduate Program in Cell and Molecular Biology, Plant Physiology Laboratory, Center for Biotechnology, Federal University of Rio Grande do Sul (UFRGS), CP 15005, Porto Alegre RS 91501-970, Brazil.
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Ndlovu G, Fouche G, Tselanyane M, Cordier W, Steenkamp V. In vitro determination of the anti-aging potential of four southern African medicinal plants. Altern Ther Health Med 2013; 13:304. [PMID: 24188320 PMCID: PMC4228251 DOI: 10.1186/1472-6882-13-304] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 10/28/2013] [Indexed: 11/29/2022]
Abstract
Background Aging is an inevitable process for all living organisms. During this process reactive oxygen species generation is increased which leads to the activation of hyaluronidase, collagenase and elastase, which can further contribute to skin aging. Four southern African medicinal plants; Clerodendrum glabrum, Schotia brachypetala, Psychotria capensis and Peltophorum africanum, were investigated to assess their anti-aging properties. Methods Anti-elastase, anti-collagenase and anti-hyaluronidase activities of twenty-eight samples, consisting of methanol and ethyl acetate extracts of the four plants, were determined using spectrophotometric methods. Radical scavenging activity was determined by the ability of the plant extracts to scavenge the ABTS•+ radical. Results The majority of the samples in the anti-elastase assay and nine in the anti-collagenase assay showed more than 80% inhibition. The ethyl acetate extract of S. brachypetala bark and leaves of P. capensis inhibited elastase activity by more than 90%. The methanol extract of S. brachypetala bark contained the highest anti-hyaluronidase activity (75.13 ± 7.49%) whilst the ethyl acetate extract of P. africanum bark exhibited the highest antioxidant activity (IC50: 1.99 ± 0.23 μg/ml). Conclusion The free radical scavenging activity and enzyme inhibitory activity of the plant extracts investigated suggests that they can help restore skin elasticity and thereby slow the wrinkling process. P. africanum was the plant with the most promising activity and will be subjected to further testing and isolation of the active compound/s.
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Matsuura HN, Rau MR, Fett-Neto AG. Oxidative stress and production of bioactive monoterpene indole alkaloids: biotechnological implications. Biotechnol Lett 2013; 36:191-200. [DOI: 10.1007/s10529-013-1348-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 09/06/2013] [Indexed: 12/11/2022]
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Matsuura HN, Fett-Neto AG. The major indole alkaloid N,β-D-glucopyranosyl vincosamide from leaves ofPsychotria leiocarpaCham. & Schltdl. is not an antifeedant but shows broad antioxidant activity. Nat Prod Res 2013; 27:402-11. [DOI: 10.1080/14786419.2012.715293] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Early Changes in Gene Expression Induced by Acute UV Exposure in Leaves of Psychotria brachyceras, a Bioactive Alkaloid Accumulating Plant. Mol Biotechnol 2012; 54:79-91. [DOI: 10.1007/s12033-012-9546-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gateva S, Jovtchev G, Stergios M, Yonova P. The potential of synthetic thiourea compound to reduce the cytotoxic and genotoxic effects of paraquat in Hordeum vulgare and cultured human lymphocytes. ENVIRONMENTAL TOXICOLOGY 2012; 27:220-228. [PMID: 20862738 DOI: 10.1002/tox.20633] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Revised: 05/31/2010] [Accepted: 06/06/2010] [Indexed: 05/29/2023]
Abstract
This work evaluated the ability of one synthetic compound 1-(4-fluorophenylthiocarbamoyl)-4-methyl-piperazine (FTMP), thiourea derivative to reduce cytotoxic and genotoxic effects of free radical inducer paraquat (PQ) in two different test systems Hordeum vulgare and human lymphocytes in vitro. The mitotic index was used as a marker for cytotoxicity. To indicate genotoxicity, chromosome aberrations test and micronucleus induction test were used. FTMP manifested a weak genotoxic effect in both test systems. Clear evidence was obtained that conditioning treatment with FTMP (10(-6) , 5 × 10(-6) , and 10(-5) mol/l) could decrease chromosome aberrations and micronuclei induced by PQ in both test systems. "Aberration hot spots" in heterochromatin containing segments were reduced. The present data show that the thiourea synthetic compound FTMP provides genome protection against the harmful action of oxidative stress inductor PQ. Human lymphocytes were found to be more sensitive to the cytotoxic and clastogenic effects of FTMP conditioning treatment than Hordeum vulgare. Revealing the protective action of newly synthesized compounds could contribute to the improvement of our present knowledge of the mechanisms of mutagenesis and antimutagenesis.
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Affiliation(s)
- Svetla Gateva
- Department of Bioindication and Risk Assessment, Central Laboratory of General Ecology, Bulgarian Academy of Sciences, 2 Gagarin Street, Sofia 1113, Bulgaria.
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Paranhos JT, Fragoso V, da Silveira VC, Henriques AT, Fett-Neto AG. Organ-specific and environmental control of accumulation of psychollatine, a major indole alkaloid glucoside from Psychotria umbellata. BIOCHEM SYST ECOL 2009. [DOI: 10.1016/j.bse.2009.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Porto DD, Henriques AT, Fett-Neto AG. Bioactive Alkaloids from South American Psychotria and Related Species. ACTA ACUST UNITED AC 2009. [DOI: 10.2174/1874847300902010029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Many important molecules have been discovered from tropical and sub-tropical plant biodiversity. However, the largest part of the chemical profile of such biodiversity remains unknown. Combining ethnopharmacological and chemotaxonomical investigation can be a good strategy in bioactive compound discovery. South American Psychotria species studied by this approach proved to be a rich source of new bioactive alkaloids, some of which bear unique chemical skeletons.
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Zhang WJ, Björn LO. The effect of ultraviolet radiation on the accumulation of medicinal compounds in plants. Fitoterapia 2009; 80:207-18. [DOI: 10.1016/j.fitote.2009.02.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 02/11/2009] [Indexed: 02/09/2023]
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