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Ferreira RC, do Nascimento YM, de Araújo Loureiro PB, Martins RX, de Souza Maia ME, Farias DF, Tavares JF, Gonçalves JCR, da Silva MS, Sobral MV. Chemical Composition, In Vitro Antitumor Effect, and Toxicity in Zebrafish of the Essential Oil from Conyza bonariensis (L.) Cronquist (Asteraceae). Biomolecules 2023; 13:1439. [PMID: 37892120 PMCID: PMC10604947 DOI: 10.3390/biom13101439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/13/2023] [Accepted: 09/17/2023] [Indexed: 10/29/2023] Open
Abstract
The essential oil from Conyza bonariensis (Asteraceae) aerial parts (CBEO) was extracted by hydrodistillation in a Clevenger-type apparatus and was characterized by gas chromatography-mass spectrometry. The antitumor potential was evaluated against human tumor cell lines (melanoma, cervical, colorectal, and leukemias), as well as non-tumor keratinocyte lines using the MTT assay. The effect of CBEO on the production of Reactive Oxygen Species (ROS) was evaluated by DCFH-DA assay, and a protection assay using the antioxidant N-acetyl-L-cysteine (NAC) was also performed. Moreover, the CBEO toxicity in the zebrafish model was assessed. The majority of the CBEO compound was (Z)-2-lachnophyllum ester (57.24%). The CBEO exhibited selectivity towards SK-MEL-28 melanoma cells (half maximal inhibitory concentration, IC50 = 18.65 ± 1.16 µg/mL), and induced a significant increase in ROS production. In addition, the CBEO's cytotoxicity against SK-MEL-28 cells was reduced after pretreatment with NAC. Furthermore, after 96 h of exposure, 1.5 µg/mL CBEO induced death of all zebrafish embryos. Non-lethal effects were observed after exposure to 0.50-1.25 µg/mL CBEO. Additionally, significant alterations in the activity of enzymes associated with oxidative stress in zebrafish larvae were observed. These results provide evidence that CBEO has a significant in vitro antimelanoma effect by increasing ROS production and moderate embryotoxicity in zebrafish.
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Affiliation(s)
- Rafael Carlos Ferreira
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Yuri Mangueira do Nascimento
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Paulo Bruno de Araújo Loureiro
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Rafael Xavier Martins
- Laboratory of Risk Assessment for Novel Technologies (LabRisk), Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Maria Eduarda de Souza Maia
- Laboratory of Risk Assessment for Novel Technologies (LabRisk), Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Davi Felipe Farias
- Laboratory of Risk Assessment for Novel Technologies (LabRisk), Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Josean Fechine Tavares
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Juan Carlos Ramos Gonçalves
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Marcelo Sobral da Silva
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
| | - Marianna Vieira Sobral
- Postgraduate Program in Natural Products and Bioactive Synthetics, Federal University of Paraíba, João Pessoa 58051-970, PB, Brazil
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Saleem M, Shahid H, Akhtar MF, Saleem A, Sharif A, Akhtar B, Tufail B, Hamid I, Javaid Z, Iqbal R. Pharmacological, Phytochemical and histopathological basis of Conyza bonariensis in the potential management of diabetes mellitus. Pak J Pharm Sci 2021; 34:2371-2377. [PMID: 35039276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
To evaluate the anti-diabetic potential of aqueous methanolic extract of Conyza bonariensis amongst the Wistar rats. Phytochemical and High Performance Liquid Chromatography (HPLC) analyses of phenols and flavonoids were examined. The plant extract (250 and 500mg/kg/day) was explored for its anti-hyperglycemic effect for 14 days in normoglycemic and alloxan-induced diabetic rats using the oral glucose tolerance test (OGTT). HPLC analyses demonstrated the composition of the plant extract as gallic acid, cinnamic acid, quercetin, p-coumaric acid and syringic acid. The blood glucose concentrations in experimental diabetic as well as non-diabetic rats significantly decreased with doses 250 and 500 mg/kg in OGTT. Moreover, the significant drop in fasting glucose level was observed following 14 days of therapy. It also ameliorated the serum cholesterol, total protein, low and high density lipoproteins, glycosylated hemoglobin A1C and serum amylase with respect to untreated rats suffering from diabetes. There appeared to be no significant alteration with regard to body weight amongst the treated rats. The plant extract revamped the pancreatic islets of Langerhans and abridged alloxan-induced degenerative changes in the liver. It can be concluded that Conyza bonariensis extract has a pronounced hypoglycemic effect on diabetes due to the presence of phytochemicals.
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Affiliation(s)
- Mohammad Saleem
- Department of Pharmacology, University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Hira Shahid
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, GC University Faisalabad, Faisalabad
| | - Muhammad Furqan Akhtar
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, Lahore Campus, Pakistan
| | - Ammara Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, GC University Faisalabad, Faisalabad
| | - Ali Sharif
- Department of Pharmacology, Faculty of Pharmaceutical and Allied health Sciences, Lahore College for Women University, Lahore, Pakistan
| | - Bushra Akhtar
- Department of Pharmacy, University of Agriculture, Faisalabad, Pakistan
| | - Bilal Tufail
- Department of Pharmacology, Faculty of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Irfan Hamid
- Cadson College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Zeeshan Javaid
- Department of Pharmacy, Mirpur University of Science and Technology, Mirpur, AJK, Pakistan
| | - Rabia Iqbal
- Cadson College of Pharmacy, University of the Punjab, Lahore, Pakistan
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El-Seedi HR, Azeem M, Khalil NS, Sakr HH, Khalifa SAM, Awang K, Saeed A, Farag MA, AlAjmi MF, Pålsson K, Borg-Karlson AK. Essential oils of aromatic Egyptian plants repel nymphs of the tick Ixodes ricinus (Acari: Ixodidae). Exp Appl Acarol 2017; 73:139-157. [PMID: 28864886 PMCID: PMC5602041 DOI: 10.1007/s10493-017-0165-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 04/02/2017] [Indexed: 05/27/2023]
Abstract
Due to the role of Ixodes ricinus (L.) (Acari: Ixodidae) in the transmission of many serious pathogens, personal protection against bites of this tick is essential. In the present study the essential oils from 11 aromatic Egyptian plants were isolated and their repellent activity against I. ricinus nymphs was evaluated Three oils (i.e. Conyza dioscoridis L., Artemisia herba-alba Asso and Calendula officinalis L.) elicited high repellent activity in vitro of 94, 84.2 and 82%, respectively. The most active essential oil (C. dioscoridis) was applied in the field at a concentration of 6.5 µg/cm2 and elicited a significant repellent activity against I. ricinus nymphs by 61.1%. The most repellent plants C. dioscoridis, C. officinalis and A. herba-alba yielded essential oils by 0.17, 0.11 and 0.14%, respectively. These oils were further investigated using gas chromatography-mass spectrometry analysis. α-Cadinol (10.7%) and hexadecanoic acid (10.5%) were the major components of C. dioscoridis whereas in C. officinalis, α-cadinol (21.2%) and carvone (18.2%) were major components. Artemisia herba-alba contained piperitone (26.5%), ethyl cinnamate (9.5%), camphor (7.7%) and hexadecanoic acid (6.9%). Essential oils of these three plants have a potential to be used for personal protection against tick bites.
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Affiliation(s)
- Hesham R El-Seedi
- Division of Pharmacognosy, Department of Medicinal Chemistry, Biomedical Centre, Uppsala University, Box 574, 751 23, Uppsala, Sweden.
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Ecological Chemistry Group, Department of Chemistry, School of Chemical Science and Engineering, KTH, Royal Institute of Technology, Stockholm, Sweden.
- Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El Kom, Egypt.
| | - Muhammad Azeem
- Ecological Chemistry Group, Department of Chemistry, School of Chemical Science and Engineering, KTH, Royal Institute of Technology, Stockholm, Sweden
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Nasr S Khalil
- Ecological Chemistry Group, Department of Chemistry, School of Chemical Science and Engineering, KTH, Royal Institute of Technology, Stockholm, Sweden
- Agricultural Research Centre, Cairo, Egypt
| | - Hanem H Sakr
- Department of Zoology, Faculty of Science, El-Menoufia University, Shebin El-Kom, 32512, Egypt
| | - Shaden A M Khalifa
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, 106 91, Sweden
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Aamer Saeed
- Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr el Aini St., P.B. 11562, Cairo, Egypt
| | - Mohamed F AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Katinka Pålsson
- Ecological Chemistry Group, Department of Chemistry, School of Chemical Science and Engineering, KTH, Royal Institute of Technology, Stockholm, Sweden
| | - Anna-Karin Borg-Karlson
- Ecological Chemistry Group, Department of Chemistry, School of Chemical Science and Engineering, KTH, Royal Institute of Technology, Stockholm, Sweden.
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Giroux MA, Valiquette É, Tremblay JP, Côté SD. Isotopic Differences between Forage Consumed by a Large Herbivore in Open, Closed, and Coastal Habitats: New Evidence from a Boreal Study System. PLoS One 2015; 10:e0142781. [PMID: 26559186 PMCID: PMC4641657 DOI: 10.1371/journal.pone.0142781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 10/27/2015] [Indexed: 11/18/2022] Open
Abstract
Documenting habitat-related patterns in foraging behaviour at the individual level and over large temporal scales remains challenging for large herbivores. Stable isotope analysis could represent a valuable tool to quantify habitat-related foraging behaviour at the scale of individuals and over large temporal scales in forest dwelling large herbivores living in coastal environments, because the carbon (δ13C) or nitrogen (δ15N) isotopic signatures of forage can differ between open and closed habitats or between terrestrial and littoral forage, respectively. Here, we examined if we could detect isotopic differences between the different assemblages of forage taxa consumed by white-tailed deer that can be found in open, closed, supralittoral, and littoral habitats. We showed that δ13C of assemblages of forage taxa were 3.0 ‰ lower in closed than in open habitats, while δ15N were 2.0 ‰ and 7.4 ‰ higher in supralittoral and littoral habitats, respectively, than in terrestrial habitats. Stable isotope analysis may represent an additional technique for ecologists interested in quantifiying the consumption of terrestrial vs. marine autotrophs. Yet, given the relative isotopic proximity and the overlap between forage from open, closed, and supralittoral habitats, the next step would be to determine the potential to estimate their contribution to herbivore diet.
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Affiliation(s)
- Marie-Andrée Giroux
- Département de Biologie and Centre d’Études Nordiques, NSERC Industrial Research Chair in Integrated Management of Resources of Anticosti Island, Université Laval, Québec, QC, Canada
- * E-mail: (MAG); (SDC)
| | - Éliane Valiquette
- Département de Biologie and Centre d’Études Nordiques, NSERC Industrial Research Chair in Integrated Management of Resources of Anticosti Island, Université Laval, Québec, QC, Canada
| | - Jean-Pierre Tremblay
- Département de Biologie and Centre d’Études Nordiques, NSERC Industrial Research Chair in Integrated Management of Resources of Anticosti Island, Université Laval, Québec, QC, Canada
- Center for Forest Research, Université Laval, Québec, QC, Canada
| | - Steeve D. Côté
- Département de Biologie and Centre d’Études Nordiques, NSERC Industrial Research Chair in Integrated Management of Resources of Anticosti Island, Université Laval, Québec, QC, Canada
- * E-mail: (MAG); (SDC)
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Shafiq A, Kanwal R, Ullah Qureshi R, Riaz Chaudhry F. In vitro screening of Cymbopogon jwarancusa and Conyza canadensis against liver flukes. Trop Biomed 2015; 32:407-412. [PMID: 26695200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Aim of present study was to screen medicinal plants for flukicidal activity in vitro to develop alternative sources of treatment for trematodes infection. For this purpose, crude methanolic extracts (CME) of Cymbopogn jwarancusa and Conyza canadensis were prepared and live adult flukes viz; Fasciola gigantica, and Paramphistomum cervi isolated from liver and bile ducts of slaughtered buffalo were subjected to different drug concentrations as well as positive and negative control. Motility inhibition and paralysis leading to the death of parasites was considered as flukicidal activity of plants extracts. The results revealed that CME of C. jwarancusa and C. canadensis showed significant (P<0.05) flukicidal activity compared to positive control. Also there was a significant effect of different concentrations (P<0.05) and exposure of time on the flukes (P<0.05). Furthermore, ED50 for C. jwarancusa and C. canadensis against F. gigantica were 13.1 and 41.4 mg/ml, respectively. In the case of P. cervi, it was 10.8 and 29.0 mg/ml. It can be concluded that both tested plants showed greater flukicidal activity as compared to positive control with Albendazole till the 8(th) hr. These potent plants needs further studies invivo to elucidate their mode of action.
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Affiliation(s)
- Andeela Shafiq
- Department of Biology, Pir Mehr Ali shah-Arid Agriculture University, Rawalpindi 4600, Pakistan
| | - Rabia Kanwal
- Department of Zoology, Pir Mehr Ali shah-Arid Agriculture University, Rawalpindi 4600, Pakistan
| | - Rahamat Ullah Qureshi
- Department of Botany, Pir Mehr Ali shah-Arid Agriculture University, Rawalpindi 4600, Pakistan
| | - Farhana Riaz Chaudhry
- Department of Zoology, Pir Mehr Ali shah-Arid Agriculture University, Rawalpindi 4600, Pakistan
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Thabit RAS, Cheng XR, Tang X, Sun J, Shi YH, Le GW. Antioxidant and antibacterial activities of extracts from Conyza bonariensis growing in Yemen. Pak J Pharm Sci 2015; 28:129-134. [PMID: 25553691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study aims to examine the antioxidant and antibacterial activities and phenolic contents of Conyza bonariensis growing in Yemen. The whole plants of C. bonariensis were ultrasonically extracted by ethanol. The antioxidant activity of the extract was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and β-carotene bleaching (BCB). The effectiveness of the extract on the growth inhibition of some indicators of foodborne illness bacteria were investigated by agar well diffusion assay. The total phenols (TP), total flavonoids (TF), total tannins (TT), and total anthocyanins (TA) were determined by Folin-Ciocalteu method, aluminium chloride method, Folin and Ciocalteu method, and pH-differential method, respectively. The extract of C. bonariensis possessed TP 144.1 mg/g, TF 143 mg/g, TT 0.99mg/g, and TA 0.97mg 100g, with 94.57% inhibition of DPPH and 92.47% inhibition of BCB, and strong inhibitory effects against tested bacteria, which was approximate to those of peel extract of Punica granatum.
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Affiliation(s)
- Riyadh Abdulmajid Saleh Thabit
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Xiang-Rong Cheng
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Xue Tang
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Jin Sun
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Yong-Hui Shi
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Guo-Wei Le
- State K. Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, PR China
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Ma L, Liu J. The protective activity of Conyza blinii saponin against acute gastric ulcer induced by ethanol. J Ethnopharmacol 2014; 158 Pt A:358-363. [PMID: 25446589 DOI: 10.1016/j.jep.2014.10.052] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/09/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Conyza blinii H.Lév., is a type of natural plant. Its dried overground section is used to treat infections and inflammations in traditional Chinese medicine. Triterpenoidal saponins have a wide range of bioactivities, for instance, anti-cancer, anti-virus and anti-anaphylaxis. Conyza blinii saponin (CBS), mainly composed of triterpenoidal saponins, is the total saponin of Conyza blinii H.Lév. It has been reported that CBS also has gastric mucous membrane protection activity. This study aims to test CBS׳s protective activity of gastric׳s mucous membrane against ethanol. This investigation may lead to the development of novel drug from natural products as anti-ulcer agent, or as gastric mucous protective against chemical damage. MATERIALS AND METHODS CBS (Conyza blinii saponin) is the total saponin of Conyza blinii H.Lév., which was obtained as described previously. We tested the protective activity of CBS against ethanol-induced ulcer. Thirty six rats were grouped randomly as 'NORMAL', 'CONTROL', 'MODEL', 'LOW DOSE', 'MEDIUM DOSE' and 'HIGH DOSE'. The 'NORMAL' group were rats with no pathological model established within it. The 'CONTROL' group was administrated with colloidal bismuth subcitrate, while 'MODEL' group was not given any active agents apart from absolute ethanol in order to obtain gastric ulcer model. The three 'DOSE' groups were treated with different concentrations of CBS (5, 10, 20mg/mL) before administration followed by absolute ethanol. All rats were sacrificed after the experiment to acquire the gastric tissue. The ulcer index (UI), malondialdehyde (MDA) and superoxide dismutase (SOD) were measured to monitor the activity of CBS. Besides, the rat gastric tissue was made to paraffin section and stained using the Hematoxylin-Eosin (HE) method. The histopathology examination was carried out to examine CBS efficacy in terms of gastric mucous protection. RESULTS We found that CBS had a profound protection activity against acute gastric ulcer induced by ethanol and this activity displayed a concentration-dependent manner. The efficacy of 10 and 20mg/mL CBS was comparable with colloidal bismuth subcitrate (P<0.05). All three level of CBS tested were able to significantly reduce UI, MDA and enhance SOD level (P<0.05). CONCLUSIONS It was deduced that the mechanism for such activity would be anti-lipid peroxidation, facilitating free radicals clearance. In addition , histopathology examination of the gastric mucous membrane supported the same conclusion, that CBS can efficiently suppress the inflammatory reactions, bleeding and protect the gastric mucosa.
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Affiliation(s)
- Long Ma
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin 300457, China; Centre for Biomolecular Sciences, University of St Andrews, Room 4.11, North Haugh, St Andrews KY16 9ST, United Kingdom.
| | - Jiangguang Liu
- School of Pharmaceutical Science and Technology, Tianjin University, No 92, Weijing Road, Nankai District, Tianjin 300072, China
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Boniface PK, Verma S, Shukla A, Cheema HS, Srivastava SK, Khan F, Darokar MP, Pal A. Bioactivity-guided isolation of antiplasmodial constituents from Conyza sumatrensis (Retz.) E.H. Walker. Parasitol Int 2014; 64:118-23. [PMID: 25449289 DOI: 10.1016/j.parint.2014.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 10/21/2014] [Accepted: 10/26/2014] [Indexed: 11/18/2022]
Abstract
Conyza sumatrensis (Retz.) E.H. Walker (Cs) leaves are used for traditional treatment of malaria in Cameroon. However, the antimalarial activity of the leaf constituents of this plant is still unexplored. The aim of our investigation was to evaluate the antiplasmodial activity of some bioactive constituents from Cs leaves. Compounds were isolated from Cs leaves and structurally elucidated using extensive spectroscopic analysis. The in vitro antiplasmodial activity of the extracts and pure compounds were evaluated on chloroquine-sensitive strain (NF54) of Plasmodium falciparum. The in vivo assay was done by administering seven doses of extracts in mice infected with Plasmodium berghei K173 through oral route. Cytotoxicity of pure compounds on murine macrophage cells was performed through [3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide] (MTT) test. Hemolysis and lactate dehydrogenase assays were also carried out using standard procedures. The in silico prediction of bioactive constituents was performed through Autodock Vina. Polarity-based extracts from Cs were found to be active against P. falciparum (NF54) and P. berghei (K173) in vitro and in vivo respectively. Further, bioactivity-guided isolation of n-hexane fraction yielded three compounds, (1), (2) and (3) with IC50 of 34, 17.9 and 18μg/ml, respectively, while the ethyl acetate fraction afforded the fourth compound with an IC50 of 25μg/ml, indicating anti-malarial potential of Cs through PfLDH interaction without compromising normal cell growth. This study reports for the first time, the antiplasmodial activity of bioactive constituents from Cs and confirms its traditional use.
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Affiliation(s)
- Pone Kamdem Boniface
- CSIR-TWAS fellow, Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box-67, Dschang, Cameroon; Department of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Surjeet Verma
- Department of Analytical Chemistry, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Aparna Shukla
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Harveer Singh Cheema
- Department of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Santosh Kumar Srivastava
- Department of Analytical Chemistry, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Feroz Khan
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Mahendra Pandurang Darokar
- Department of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
| | - Anirban Pal
- Department of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India.
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Mayeku WP, Omollo NI, Odalo OJ, Hassanali A. Chemical composition and mosquito repellency of essential oil of Conyza newii propagated in different geographical locations of Kenya. Med Vet Entomol 2014; 28:253-256. [PMID: 24266583 DOI: 10.1111/mve.12039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/29/2013] [Accepted: 10/09/2013] [Indexed: 06/02/2023]
Abstract
Previously, essential oil of Conyza newii (Asterale: Asteracea, Oliv. & Hiern) growing in the northern part of West Pokot (35°E, 1°N) of Kenya was shown to be highly repellent [RD50 = 8.9 × 10(-5) mg/cm(2) , 95% confidence interval (CL)] to Anopheles gambiae s.s. Fumigant toxicity of the oil to the mosquito was also demonstrated. The major constituents of the oil were found to be monoterpenoids, including (S)-(-)-perillyl alcohol, (S)-(-)-perillaldehyde, geraniol, (R)-(+)-limonene, trans-β-ocimene and 1,8-cineol. In this study, the chemical composition and repellency of essential oils of the plant seedlings collected from West Pokot (35°E, 1°N) and propagated in seven different geographical regions of Kenya [West Pokot (35°E, 1°N), Kilome (37°E, 1°S), Naivasha (36°E, 0°), Webuye (34°E, 1°N), Nyakach (34°E, 0°), Kericho (35°E, 0°) and Nairobi (36°E, 1°S)] were compared. There were significant variations (P < 0.01, 95% CL) in the relative proportions of the six constituents and this was reflected in the repellency of the essential oils (P < 0.01, 95% CL). Higher repellency of the oil was associated with greater proportions of (S)-(-) perillyl alcohol, (S)-(-)-perillaldehyde and geraniol, and lower repellency was associated with an increased proportion of (R)-(+)-limonene. The results suggest significant epigenetic (chemotypic) variations in the repellency and composition of C. newii essential oils growing in different regions of Kenya.
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Affiliation(s)
- W P Mayeku
- Department of Chemistry, School of Physical Sciences, Makerere University, Kampala, Uganda
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Abstract
CONTEXT Conyza filaginoides (D.C.) Hieron (Asteraceae) is a medicinal Mexican plant highly prized in contemporary Mexico for the treatment of upset stomach and diabetes. OBJECTIVE This work was undertaken to develop a suitable high performance liquid chromatography (HPLC)-diode array detection (DAD) method for quantifying rutin (1), the main active principle from the aerial parts of C. filaginoides. MATERIALS AND METHODS The method was performed using a LiChrospher 100 RP-18 column. The mobile phase was water (containing 0.1% phosphoric acid)-methanol-acetonitrile (80:5:15, v/v) at a flow rate of 1.2 mL min⁻¹. RESULTS Limits of detection and quantification were 7.5 and 22.8 μg mL⁻¹, respectively. The main recoveries measured at three concentrations were higher than 98%, with RSD <2%. Quantitative analysis of a few samples showed the presence of high concentrations of 1 (3.6 ± 0.2 g/100 g of dry plant material). The volatile components were extracted by hydrodistillation or head space solid-phase microextraction (HS-SPME), and thereafter analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Forty-three chemical constituents representing 90% of the total content of the oil were identified. The major light volatile compounds obtained by HS-SPME revealed a high content of monoterpene hydrocarbons. CONCLUSIONS A precise, reliable, and accurate analytical HPLC method to detect and quantify 1 in the crude drug and some preparations were developed and fully validated. The volatile components of the plant are described for the first time. The proposed method would be useful for quality control assurance of this important Mexican plant.
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Affiliation(s)
- Berenice Ovalle-Magallanes
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México , Mexico City 04510 , Mexico
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Kamdem Boniface P, Singh M, Kumar Maurya A, Pal A. Acute and sub-chronic toxicity of HPLC fingerprinted extract of Conyza sumatrensis (Retz.) E.H. Walker in rodents. J Ethnopharmacol 2013; 149:833-837. [PMID: 23920248 DOI: 10.1016/j.jep.2013.07.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 06/14/2013] [Accepted: 07/06/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Conyza sumatrensis (CS) is an extensively used medicinal herb in the tropics for varied ailments related to pain, inflammation and malaria. Though in constant folkloric use, scientific validations are proving valuable. AIM OF THE STUDY Evaluate the safety profile of methanol extract from CS in mice and rats through acute and sub-chronic toxicity studies respectively. MATERIAL AND METHODS Acute toxicity study involved the single oral administration of CS at 1000, 2000 and 3000mg/kg in mice, while the sub chronic toxicity was carried upon in rats at doses 250, 500 and 1000mg/kg/day for 28 days. Besides body weight, general behaviour and mortality, serum biochemical parameters and liver histology were assessed after 7 and 28 days for acute and sub-chronic study respectively. The parameters were again checked on days 14 and 56 in order to assess the recovery from damage, if any. HPLC fingerprinting of the aqueous and methanol extract was performed through C18 column using water: acetonitrile as mobile phase with observations at 240nm. RESULTS In the acute toxicity test, single oral dose of 1000, 2000 and 3000mg/kg of CS did not result in any behavioural changes or mortality, indicating non toxicity. In sub-chronic toxicity studies in rats, no mortality was observed at 250, 500 and 1000mg/kg/day when administered orally for a period of 28 days. Except Serum Glutamate Pyruvate Transaminase (SGPT) level in acute study and Alkaline Phosphatase (ALP), SGPT and Serum Glutamate Oxaloacetate Transaminase (SGOT) level in sub-chronic study, all the observational, haematological and biochemical parameters studied showed non-significant changes. Histological examination of liver did not reveal any treatment-related effects in any of the studies. Moreover, haematological and biochemical changes orchestrated by CS got normalised after 14 and 56 days post-treatment in acute and sub-chronic toxicity respectively. The HPLC fingerprint could resolve 11 and 28 peaks from aqueous and methanol extracts respectively. CONCLUSION The experiments indicate the methanol extract to be safe even at high and repeated doses in pre-clinical studies even though the constituents are more than in aqueous extract.
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Affiliation(s)
- Pone Kamdem Boniface
- CSIR-TWAS fellow, Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box-67, Dschang, Cameroon; Department of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, Uttar Pradesh, India
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Araujo L, Moujir LM, Rojas J, Rojas L, Carmona J, Rondón M. Chemical composition and biological activity of Conyza bonariensis essential oil collected in Mérida, Venezuela. Nat Prod Commun 2013; 8:1175-1178. [PMID: 24079198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
The essential oil from aerial parts of Conyza bonariensis (L) Cronquist collected in Mérida was obtained by hydrodistillation and analysed by GC/MS. The major components were trans-beta-farnesene (37.8%), trans-ocimene (20.7%) and beta-sesquiphellandrene (9.8%). Cytotoxicity assay was also performed with the essential oil against HeLa (cervix carcinoma), A-459 (lung carcinoma) and MCF-7 (breast adenocarcinoma) human cell lines and against normal Vero cells (African green monkey kidney) with IC50 values ranging from 1.4 to 45.8 microg/mL. Additionally, the essential oil presented a significant bactericidal effect against Bacillus cereus, while a moderate activity was observed against Staphylococcus epidermidis and Candida albicans.
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Affiliation(s)
- Liliana Araujo
- Microbiology and Cell Biology Department, University of La Laguna, La Laguna, Tenerife, Spain
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13
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Bukhari IA, Shah AJ, Khan RA, Meo SA, Khan A, Gilani AH. Gut modulator effects of Conyza bonariensis explain its traditional use in constipation and diarrhea. Eur Rev Med Pharmacol Sci 2013; 17:552-558. [PMID: 23467958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND AND OBJECTIVES The current investigation was carried out to explore the pharmacological basis of the crude extract of Conyza bonariensis (Cb.Cr) for its use in constipation and diarrhea. MATERIALS AND METHODS The plant extract of Conyza bonariensis (C. bonariensis) was prepared, isolated guinea-pig ileum and rabbit jejunum preparations were used to evaluate its gut modulator effects. RESULTS The Cb.Cr (0.3-10 mg/mL) exhibited spasmogenic effect in isolated guinea-pig ileum preparation, which was about 19-84% of the acetylcholine maximum. Pretreatment of the tissues with atropine (0.1 µM) abolished the contractile effect, similar to acetylcholine. Among the fractions, only the butanol fraction exhibited atropine sensitive contractile effect. In isolated rabbit jejunum preparations, Cb.Cr produced appreciable atropine-sensitive spasmogenic effect at lower concentrations (0.03-0.3 mg/mL) followed by spasmolytic effect at next higher concentration (1.0 and 3.0 mg/mL). Cb.Cr caused an inhibition of the high K+ induced contraction in isolated rabbit jejunum preparation with EC50 value of 0.62 mg/mL. Similarly, verapamil, a standard calcium blocker, inhibited high K+ induced contraction in isolated rabbit jejunum preparations. Cb.Cr caused a right ward shift in the Ca++ concentration response curve, similar to verapamil. Among various fractions of C. bonariensis, only hexane and ethylacetate fractions showed spasmolytic effects. CONCLUSIONS The crude extract of C. bonariensis contains spasmogenic and spasmolytic constituents, which explains its medicinal use in constipation and diarrhea.
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Affiliation(s)
- I A Bukhari
- Department of Physiology, Pharmacology division, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
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Boniface PK, Pal A. Substantiation of the ethnopharmacological use of Conyza sumatrensis (Retz.) E.H.Walker in the treatment of malaria through in-vivo evaluation in Plasmodium berghei infected mice. J Ethnopharmacol 2013; 145:373-377. [PMID: 23123263 DOI: 10.1016/j.jep.2012.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 08/13/2012] [Accepted: 10/12/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Scientific validation of ethnopharmacologically used plants and their utilization for therapeutic interventions can be a source of affordable treatment especially for neglected diseases in endemic areas. Conyza sumatrensis is a plant which finds its use in treating malaria like fevers but lacks proper scientific validation. Our study has tried to address this gap by authenticating its traditional use for the treatment of malaria. AIM OF THE STUDY Evaluate the antimalarial activity of extracts derived from Conyza sumatrensis for its ethnopharmacological validation. MATERIALS AND METHODS Shade dried leaves were extracted with varying concentrations of ethanol and concentrated for bio-evaluation. Swiss albino mice infected with 1 × 10(6) parasitized red blood cells, were orally administered with test extracts for 7 days in two sets of experiments. The first set was used to evaluate alcoholic, hydroalcoholic and aqueous extracts while the second set was used to evaluate the dose response of alcoholic extract ranging from 500-1600 mg/kg. Mean survival time, parasitaemia and haemoglobin levels were considered to interpret the antimalarial potential. Phytochemical analysis for the presence of flavonoids, alkaloids tannins, total phenolics, riboflavin and thiamine was also carried out. RESULTS Among the three extracts administered at 1000 mg/kg, chemo suppression was significantly (p<0.001) observed in the alcoholic extract (62.59 ± 12.52%) followed by hydroalcoholic (41.81 ± 19.04%, p<0.01) and aqueous (32.04 ± 19.04%, P<0.05) indicating that the active constituents leach out in ethanol. The dose response study involving the ethanol extract concluded the optimum dose to be 1000 mg/kg, as also evidenced by the haemoglobin levels. CONCLUSION The plant exhibits moderate antimalarial activity which can be further prospected for active fractions or pure molecules for adjunctive therapy.
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Affiliation(s)
- Pone Kamdem Boniface
- Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box-67, Dschang, Cameroon
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Shao S, Yang MM, Bi SN, Wan ZQ. [Flavonoids of Erigeron canadensis]. Zhongguo Zhong Yao Za Zhi 2012; 37:2902-2905. [PMID: 23270230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To study the flavonoids of Erigeron canadensis. METHOD The constituents of EtOH extraction from the whole plant of E. canadensis were isolated and purified by repeated column chromatography. These compounds were identified by their physical and spectral data. RESULT Twelve flavonoids were isolated and identified as quercetin-7-O-beta-D-galactopyranoside(1),quercetin(2), luteolin(3), apigenin(4),5,7,4'-trihydroxy-3'-methoxy flavone(5), quercetin-3-alpha-rhamnopyranoside(6), quercetin-3-O-beta-D-glucopyranoside(7), apigenin-7-O-beta-D-glucopyranoside(8), luteolin-7-O-beta-D-glucuronide methyl ester(9),4'-hydroxy baicalein-7-O-beta-D-glucopyranoside(10),baicalein(11),rutin(12). CONCLUSION Compound 1 was isolated from the Compositae family for the first time. Compound 5 and 9 were firstly isolated from the genus Erigeron. Compound 3,4,7,8 and 11 were isolated from E. canadensis for the first time.
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Affiliation(s)
- Shuai Shao
- Changchun University of Traditional Chinese Medicine, Changchun 130117, China.
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Queiroz SCN, Cantrell CL, Duke SO, Wedge DE, Nandula VK, Moraes RM, Cerdeira AL. Bioassay-directed isolation and identification of phytotoxic and fungitoxic acetylenes from Conyza canadensis. J Agric Food Chem 2012; 60:5893-8. [PMID: 22612410 DOI: 10.1021/jf3010367] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Conyza canadensis (L.) Cronquist syn. (horseweed) is a problematic and invasive weed with reported allelopathic properties. To identify the phytotoxic constituents of the aerial parts, a systematic bioactivity-guided fractionation of the dichloromethane extract was performed. Three active enyne derivatives, (2Z,8Z)-matricaria acid methyl ester, (4Z,8Z)-matricaria lactone, and (4Z)-lachnophyllum lactone, were identified. The lactones inhibited growth of the monocot Agrostis stolonifera (bentgrass) and the dicot Lactuca sativa (lettuce) at 1 mg mL(-1), while the (2Z,8Z)-matricaria acid methyl ester was less active. In a dose-response screening of the lactones for growth inhibitory activity against Lemna paucicostata , (4Z)-lachnophyllum lactone was the most active with an IC50 of 104 μM, while the (4Z,8Z)-matricaria lactone was less active (IC50 of 220 μM). In a fungal direct bioautography assay, the two lactones at 10 and 100 μg/spot inhibited growth of the plant pathogenic fungi Colletotrichum acutatum , Colletotrichum fragariae , and Colletotrichum gloeosporioides . In a dose-response screening of the lactones against six different plant pathogenic fungi, (4Z,8Z)-matricaria lactone was more active than the commercial fungicide azoxystrobin on Col. acutatum , Col. fragariae , and Col. gloeosporioides at 30 μM and about as active as the commercial fungicide captan against Col. gloeosporioides , while (4Z)-lachnophyllum lactone was less active.
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Ge X, d'Avignon DA, Ackerman JJH, Duncan B, Spaur MB, Sammons RD. Glyphosate-resistant horseweed made sensitive to glyphosate: low-temperature suppression of glyphosate vacuolar sequestration revealed by 31P NMR. Pest Manag Sci 2011; 67:1215-21. [PMID: 21495156 DOI: 10.1002/ps.2169] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 02/17/2011] [Accepted: 02/22/2011] [Indexed: 05/23/2023]
Abstract
BACKGROUND Horseweed has been the most invasive glyphosate-resistant (GR) weed, spreading to 16 states in the United States and found on five continents. The authors have previously reported that GR horseweed employs rapid vacuolar sequestration of glyphosate, presumably via a tonoplast transporter, substantively to reduce cytosolic glyphosate concentrations.1 It was hypothesized that glyphosate sequestration was the herbicide resistance mechanism. If resistance is indeed endowed by glyphosate sequestration, suppression of sequestration offers the potential for controlling GR horseweed at normal herbicide field-use rates. RESULTS Low-temperature (31) P NMR experiments performed in vivo with GR cold-acclimated horseweed showed markedly suppressed vacuolar accumulation of glyphosate even 3 days after glyphosate treatment. [In stark contrast, 85% of the visible glyphosate was sequestered 24 h after spraying warm-acclimated GR horseweed.] Cold-acclimated GR horseweed treated at normal use rates and maintained at low temperature succumbed to the lethal effects of glyphosate over a 40 day period. Treatment of GR horseweed in the field when temperatures were cooler showed the predicted positive herbicidal response. CONCLUSIONS Low temperature markedly diminishes vacuolar sequestration of glyphosate in the GR horseweed biotype, yielding a herbicide response equivalent to that of the sensitive biotype. This supports the recent hypothesis1 that glyphosate sequestration is the resistance mechanism employed by GR horseweed.
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Affiliation(s)
- Xia Ge
- Department of Chemistry, Washington University, St Louis, MO, USA
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Csupor-Löffler B, Hajdú Z, Zupkó I, Molnár J, Forgo P, Vasas A, Kele Z, Hohmann J. Antiproliferative constituents of the roots of Conyza canadensis. Planta Med 2011; 77:1183-8. [PMID: 21294076 DOI: 10.1055/s-0030-1270714] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Bioassay-guided fractionation of the N-hexane and CHCl₃ phases of the methanol extract of the roots of Conyza canadensis (L.) Cronquist led to the isolation of two new dihydropyranones named conyzapyranone A (1) and B (2), and the known 4 Z,8 Z-matricaria- γ-lactone (3), 4 E,8 Z-matricaria- γ-lactone (4), 9,12,13-trihydroxy-10(E)-octadecenoic acid (5), epifriedelanol (6), friedeline (7), taraxerol (8), simiarenol (9), spinasterol (10), stigmasterol, β-sitosterol, and apigenin. The structures were determined by means of ESIMS and 1D and 2D NMR spectroscopy, including ¹H-¹H COSY, NOESY, HSQC, and HMBC experiments. The isolated compounds were evaluated for their antiproliferative activities and were demonstrated to exert considerable cell growth-inhibitory activity against human cervix adenocarcinoma (HeLa), skin carcinoma (A431), and breast adenocarcinoma (MCF-7) cells. Some of the active components, including 2, 4, and 10, proved to be substantially more potent against these cell lines than against noncancerous human foetal fibroblasts (MRC-5) and can therefore be considered selective antiproliferative natural products.
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Liu HL, Liu BL, Wang GC, Dai Y, Ye WC, Li YL. [Studies on the chemical constituents from Conyza canadensis]. Zhong Yao Cai 2011; 34:718-720. [PMID: 21954558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To study the chemical constituents of Conyza canadensis. METHODS Chromatographic methods including HP20 macroporous resin, silica gel, Sephadex LH-20 and eighteen alkyl silane bonding silica gel (ODS) were used for the isolation and purification of Conyza canadensis. The structures of the obtained compounds were identified by physical chemistry and spectroscopic data. RESULTS Six compounds were isolated from ethanol-extraction of water area of C. canadensis and identified as Eugenyl beta-Psd (1), scutellarin (2), luteolin-7-O-beta-D-glucuronide (3), quercetin (4), quercetin-3-O-beta-D-glucopyranoside (5) and luteolin (6). CONCLUSION Compounds 1,3,5 and 6 are isolated from C. canadensis for the first time.
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Affiliation(s)
- Hong-Li Liu
- Institute of Traditional Chinese Medicine & Natural Products/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, China
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Qiao X, Zhang X, Ye M, Su YF, Dong J, Han J, Yin J, Guo DA. Rapid characterization of triterpene saponins from Conyza blinii by liquid chromatography coupled with mass spectrometry. Rapid Commun Mass Spectrom 2010; 24:3340-3350. [PMID: 20973010 DOI: 10.1002/rcm.4776] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Conyza blinii Le'vl is a medicinal herb used for the treatment of inflammation in Chinese folk medicine. Its major bioactive constituents are triterpene saponins, most of which contain 6-8 sugar residues. In this report, electrospray ionization tandem mass spectrometry fragmentation behaviors of bisdesmosidic triterpene saponins (conyzasaponin A, B, and C) were studied in both positive and negative ion modes with an ion-trap mass spectrometer. In full scan mass spectrometry, these saponins gave predominant [M-H](-) and [M+Na](+) ions, which determined the molecular weights. In tandem mass spectrometry (MS(n), n = 2-4), the [M-H](-) and [M+Na](+) ions yielded fragments [Y(0α)-H](-) and [B(α)+Na](+), which were diagnostic for the structures of the triterpene skeleton and sugar chains. The structural elucidation was approved by accurate mass data using IT-TOF-MS. An interpretation guideline based on MS(n) (n = 2-4) diagnostic ions was proposed in order to elucidate the chemical structures of unknown triterpene saponins in C. blinii extract. The saponins in C. blinii were separated by liquid chromatography with a methanol/acetonitrile/water solvent system, and then analyzed by ion-trap and IT-TOF mass spectrometers. Based on the interpretation guideline, a total of 35 triterpenoid saponins were tentatively identified. Among them, 15 saponins had been previously reported, and the other 20 saponins were reported from Conyza species for the first time. This study indicates that LC/MS is a powerful technology for the rapid characterization of complicated saponins in herbal extracts.
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Affiliation(s)
- Xue Qiao
- The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
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Zahoor A, Siddiqui IN, Khan A, Ahmad VU, Ahmed A, Hassan Z, Khan SS, Iqbal S. Two new glycosides from Conyza bonariensis. Nat Prod Commun 2010; 5:1099-1102. [PMID: 20734949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
Studies on Conyza bonariensis (L.) Cronq. led to the isolation of two new glycosides trivially named as erigeside E and F (1-2), along with two new source compounds; benzyl-beta-D-glucopyranoside (3) and 2-phenylethyl-beta-D-glucopyranoside (4). Compounds 1, 3, and 4 are aromatic glycosides, while compound 2 is an alkyl glycoside. Their structures were elucidated through mass spectrometric, and 1D- and 2D-NMR spectroscopic techniques, including 1H NMR, 13C NMR, HMQC, HSQC and HMBC.
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Affiliation(s)
- Aqib Zahoor
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi- 75270, Pakistan
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Ding Y, Su Y, Guo H, Yang F, Mao H, Gao X, Zhu Z, Tu G. Phenylpropanoyl esters from Horseweed (Conyza canadensis) and their inhibitory effects on catecholamine secretion. J Nat Prod 2010; 73:270-274. [PMID: 20121251 DOI: 10.1021/np900670b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Three unique phenylpropanoyl 2,7-anhydro-3-deoxy-2-octulosonic acid derivatives were isolated from Conyza canadensis (horseweed). Their structures were defined as rel-(1S,2R,3R,5S,7R)-methyl 7-caffeoyloxymethyl-2-hydroxy-3-feruloyloxy-6,8-dioxabicyclo[3.2.1]octane-5-carboxylate (1), rel-(1S,2R,3R,5S,7R)-methyl 7-feruloyloxymethyl-2-hydroxy-3-feruloyloxy-6,8-dioxabicyclo[3.2.1]octane-5-carboxylate (2), and rel-(1R,2R,3R,5S,7R)-methyl 7-feruloyloxymethyl-2-feruloyloxy-3-hydroxy-6,8-dioxabicyclo[3.2.1]octane-5-carboxylate (3). Compound 1 and a 5:3 mixture of compounds 2 and 3 were demonstrated to inhibit the catecholamine secretion induced by acetylcholine with IC(50) values of 94.65 and 42.35 microM, respectively, and to inhibit the catecholamine secretion induced by veratridine and high [K(+)] at a dose of 100 microM in cultured bovine adrenal medullary cells.
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Affiliation(s)
- Yuexu Ding
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, People's Republic of China
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Chodová D, Salava J, Martincová O, Cvikrová M. Horseweed with reduced susceptibility to glyphosate found in the czech republic. J Agric Food Chem 2009; 57:6957-61. [PMID: 19722578 DOI: 10.1021/jf901292x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The physiological and molecular basis of apparent resistance to glyphosate in horseweed (Conyza canadensis L. Cronq.) plants that had survived being sprayed with the herbicide at Prague-Bubny railway station in the Czech Republic was investigated. For the sake of comparison, plants expected to be susceptible were collected in areas where no herbicides had been used. Plants of both sets were treated, at the rosette stage (10-25 leaves, diameter of 3-5 cm), with herbicide at the rate recommended for use in the Czech Republic to control horseweed (960 g of glyphosate-IPA/ha; Roundup Klasik, Monsanto, 480 g of glyphosate-IPA ae L(-1)). Phytotoxic symptoms of the treated plants varied substantially, both between and within these sets of plants. Leaves of susceptible (S) plants wilted and turned yellow, and the plants subsequently died; leaves of plants with reduced susceptibility (RS) remained green, or new leaves were created in the center of their rosettes a few weeks after glyphosate application. There were no significant differences in the accumulation of shikimate between S and RS plants 3 days after treatment (DAT). However, the time course of changes in shikimic acid contents differed between the two biotypes; from 3 to 10 DAT, they decreased more than 4-fold in RS plants, while in S plants, they increased (3-fold, on average) from 3 to 7 DAT. A conserved region of the epsps gene, in which mutations are known to confer resistance in several plant species, was amplified from samples of both S and RS plants and sequenced, but no changes in the encoded amino acid sequence were found, indicating that mutations at another epsps site were responsible for the observed resistance, or that the mechanism may be at least partially non-target-based. Our results suggest that the reduced susceptibility to glyphosate may be due to impaired herbicide translocation, as previously found in studies of horseweed in the United States.
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Affiliation(s)
- Daniela Chodová
- Crop Research Institute, Division of Plant Health, Drnovska 507, 161 06 Prague 6, Czech Republic
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Olas B, Saluk-Juszczak J, Pawlaczyk I, Nowak P, Kolodziejczyk J, Gancarz R, Wachowicz B. Antioxidant and antiaggregatory effects of an extract fromConyza canadensison blood plateletsin vitro. Platelets 2009; 17:354-60. [PMID: 16973495 DOI: 10.1080/09537100600746805] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The antioxidative activity of the polysaccharide extract from Conyza canadensis in blood platelets treated with peroxynitrite (ONOO-) was studied. Peroxynitrite as a strong biological oxidant has toxic effects on blood platelets and induces the oxidation of thiols, carbonylation and nitration of platelet proteins and lipid peroxidation. Therefore, the aim of our study was to assess if the natural extract from herbal plant, Conyza Canadensis, may protect platelet proteins against nitrative and oxidative damage induced by ONOO-. In our study we measured oxidative damage of platelet proteins induced by peroxynitrite and protectory effects of this extract by estimation of the level of carbonyl groups and nitrotyrosine (a marker of platelet protein nitration). We also used cytochrome c reduction method to test the ability of this extract to change O2-* generation in platelets. Moreover, we determined the effects of the extract on blood platelet aggregation induced by ADP. We observed that the extract from Conyza canadensis distinctly reduced oxidation and nitration of proteins in blood platelets treated with ONOO-(0.1mM) and O2-* production in these cells. The extract from Conyza canadensis also inhibited platelet aggregation. The ability of the extract to decrease O2-* generation in blood platelets supports the importance of free radicals in platelet functions, including aggregation process. The present study suggests that the natural polysaccharide extract from Conyza canadensis has antiaggregatory and antioxidative activities, and therefore may be beneficial in the prevention of peroxynitrite-related diseases, such as cardiovascular or inflammatory diseases.
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Affiliation(s)
- Beata Olas
- Department of General Biochemistry, Institute of Biochemistry, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland.
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Abstract
From the whole plants of Conyza canadensis (Compositae), a new C-10 acetylene, namely 8R, 9R-dihydroxymatricarine methyl ester (1), and a new triterpenoid, namely 3beta, 16beta, 20beta-trihydroxytaraxast-3-O-palmitoxyl ester (4), were isolated along with eleven known compounds (2, 3, 5-13). The structures of all 13 compounds were elucidated on the basis of their spectral data. The antibacterial activities of compounds 1-3 were evaluated.
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Affiliation(s)
- Wei Dong Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P.R. China
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26
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Saluk-Juszczak J, Olas B, Pawlaczyk I, Gancarz R, Wachowicz B. Effects of the extract from Conyza canadensis on human blood platelet aggregation. Gen Physiol Biophys 2007; 26:150-2. [PMID: 17660590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The effects of different parts of extract from medicinal plant Conyza canadensis, used to control bleeding, on human blood platelet aggregation in vitro were investigated. Aqueous extract of Conyza c. from young or old plants, glycoconjugate part, polysaccharide part and aglycon part at the concentrations above 0.75 mg/ml strongly inhibited platelet aggregation induced by collagen (2 microg/ml) in dose-dependent manner. Polysaccharide part isolated from plant extract had the strongest inhibitory effect on aggregation stimulated by collagen and seems to be responsible for antiaggregatory properties.
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Affiliation(s)
- J Saluk-Juszczak
- Department of General Biochemistry, Institute of Biochemistry, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland.
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27
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Abstract
Nine new triterpenoid saponins, conyzasaponins I-Q (1-9), were isolated from the aerial parts of Conyza blinii. Their structures were established on the basis of extensive 1D and 2D NMR spectra as well as by chemical degradations. Among these compounds, conyzasaponins M-O (5-7) share a common pentasaccharide unit attached to C-28 of the aglycon, 28-O-beta-d-apiofuranosyl-(1-->3)-beta-d-xylopyranosyl-(1-->4)-[beta-d-apiofuranosyl-(1-->3)]-alpha-l-rhamnopyranosyl-(1-->2)-alpha-l-arabinopyranosyl ester, which contains two apiofuranosyl residues. To the best of our knowledge, they are among the few examples of natural products possessing two apiofuranose units in a single sugar chain.
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Affiliation(s)
- Yanfang Su
- School of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
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Souza MC, Siani AC, Ramos MFS, Menezes-de-Lima OJ, Henriques MGMO. Evaluation of anti-inflammatory activity of essential oils from two Asteraceae species. Pharmazie 2003; 58:582-6. [PMID: 12967039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
The essential oils from two Asteraceae species, Porophyllum ruderale (PR) and Conyza bonariensis (CB) were screened for anti-inflammatory activity in the mouse model of pleurisy induced by zymosan (500 microg/cavity) and lipopolysaccharide (LPS) (250 ng/cavity). The main monoterpene constituents of each oil, beta-myrcene (in PR) and limonene (in CB), were tested in the LPS-induced pleurisy model and assayed also for immunoregulatory activity by measurement of the inhibition of NO and production of the cytokines, gamma-interferon and IL-4. The oils, when administered orally, were able to inhibit the LPS-induced inflammation including cell migration; with a similar effect being observed for pure limonene. Pure beta-myrcene and limonene were also effective in inhibiting production of nitric oxide at doses below the cytotoxicity of these monoterpenes. A significant inhibition of gamma-interferon and IL-4 production by limonene and beta-myrcene was also observed.
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Affiliation(s)
- M C Souza
- Laboratório de Química de Produtos Naturais e Farmacologia Aplicada, Instituto de Tecnologia em Fármacos, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Mazyad SA, El-Serougi AO, Morsy TA. The efficacy of the volatile oils of three plants for controlling Lucilia sericata. J Egypt Soc Parasitol 2003; 29:91-100. [PMID: 12561887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Myiasis is one of the most important parasitic diseases, which affects the human welfare. The volatile oils of three plants were tested against adult Lucilia sericata. The LC50 was 80 ppm by Anethum graveolens, 180 ppm by Conyza dioscoridis and 130 ppm by Mentha microphylla. The slope functions were 1.9, 1.79 and 2.2 respectively. The whole results were discussed.
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Affiliation(s)
- S A Mazyad
- Ain Shams Research and Training Center on Vectors of Diseases, Cairo 11566, Egypt
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Abstract
New sphingolipids, 1,3,5-trihydroxy-2-hexadecanoylamino-(6E,9E)-heptacosdiene (1). 1,3,5-trihydroxy-2-hexadecanoylamino-(6E,9E)-heptacosdiene-1-O-glucopyranoside (2). 1,3-dihydroxy-2-hexanoylamino-(4E)-heptadecene (3). have been isolated from Conyza canadensis, along with five known compounds, p-hydroxybenzoic acid, 3,5-dihydroxybenzoic acid, 3,5-dimethoxybenzoic acid, 3beta-hydroxyolean-12-en-28-oic acid, and 3beta-erythrodiol, isolated for the first time from this species. Their structures were determined by spectroscopic methods ((1)H- and (13)C-NMR, IR and MS) and two dimensional (2D)-NMR experiments.
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Affiliation(s)
- Naveen Mukhtar
- International Centre for Chemical Sciences, HEJ Research Institute of Chemistry, University of Karachi, Pakistan
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Abstract
Sphingolipid 1 and its corresponding beta-D-glucopyranoside derivative 2 have been isolated from the ethylacetate fraction of Conyza canadensis along with beta-sitosterol 3, stigmasterol 4, beta-sitosterol 3-O-beta-D-glucoside 5 and harmine 6, reported for the first time from this species. The structures of 1 and 2 were elucidated through spectroscopy including two-dimensional NMR.
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Affiliation(s)
- Naveen Mukhtar
- International Centre for Chemical Sciences, HEJ Research Institute of Chemistry University of Karachi, Karachi-75270, Pakistan
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