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Faleschini T, Syafni N, Schulte HL, Garifulina A, Hering S, Espindola LS, Hamburger M. A neolignan from Connarus tuberosus as an allosteric GABA A receptor modulator at the neurosteroid binding site. Biomed Pharmacother 2023; 161:114498. [PMID: 36906973 DOI: 10.1016/j.biopha.2023.114498] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/24/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
In a screening of a small library of extracts from plants of the Amazonian and Cerrado biomes, a hexane extract of Connarus tuberosus roots was found to significantly potentiate the GABA induced fluorescence in a fluorescence (FLIPR) assay in CHO cells stably expressing the α1β2γ2 subtype of human GABAA receptors. With the aid of HPLC-based activity profiling the activity was linked to the neolignan connarin. In CHO cells the activity of connarin was not abolished by increasing concentrations of flumazenil, while the effect of diazepam was increased by increasing concentrations of connarin. The effect of connarin was abolished by pregnenolone sulfate (PREGS) in a concentration-dependent manner, and the effect of allopregnanolone was further increased by increasing concentrations of connarin. In a two-microelectrode voltage clamp assay with Xenopus laevis oocytes transiently expressing GABAA receptors composed of human α1β2γ2S and α1β2 subunits connarin potentiated the GABA-induced currents, with EC50 values of 1.2 ± 0.3 μM (α1β2γ2S) and 1.3 ± 0.4 μM (α1β2), and with a maximum enhancement of currents Emax of 1959 ± 70% (α1β2γ2S) and 185 ± 48% (α1β2). The activation induced by connarin was abolished by increasing concentrations of PREGS.
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Affiliation(s)
- Teresa Faleschini
- Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland
| | - Nova Syafni
- Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland; Faculty of Pharmacy and Sumatran Biota Laboratory, Andalas University, 25163 Padang, West Sumatra, Indonesia
| | - Heidi Luise Schulte
- Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland; Universidade de Brasília, Laboratório de Farmacognosia, Campus Universitário Darcy Ribeiro, 70910-900 Brasília, DF, Brazil
| | - Aleksandra Garifulina
- Division of Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Vienna, 1090 Vienna, Austria
| | - Steffen Hering
- Universidade de Brasília, Laboratório de Farmacognosia, Campus Universitário Darcy Ribeiro, 70910-900 Brasília, DF, Brazil
| | - Laila Salmen Espindola
- Universidade de Brasília, Laboratório de Farmacognosia, Campus Universitário Darcy Ribeiro, 70910-900 Brasília, DF, Brazil
| | - Matthias Hamburger
- Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland.
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Nunes Alves Paim LF, Dos Santos PR, Patrocinio Toledo CA, Minello L, Lima da Paz JR, Castro Souza V, Salvador M, Moura S. Four almost unexplored species of Brazilian Connarus ( Connaraceae): Chemical composition by ESI-QTof-MS/MS-GNPS and a pharmacologic potential. Phytochem Anal 2022; 33:286-302. [PMID: 34510611 DOI: 10.1002/pca.3087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 06/03/2021] [Revised: 07/21/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
INTRODUCTION Species of Connaraceae are globally used in traditional medicines. However, several of these have not been studied regarding their chemical composition, and some are even at risk of extinction without proper studies. Therefore, the chemical composition and pharmacological potential of Connarus blanchetii Planch., Connarus nodosus Baker, Connarus regnellii G. Schellenb., and Connarus suberosus Planch., which were previously unknown, were analyzed. OBJECTIVE This work aims to investigate the pharmacological potential of these four Connarus species. The chemical composition of different extracts was determined by high-resolution mass spectrometry (HRMS), with subsequent analysis by the GNPS platform and competitive fragmentation modeling (CFM). MATERIALS AND METHODS Leaf extracts (C. blanchetii, C. nodosus, C. regnellii, and C. suberosus) and bark extracts (C. regnellii and C. suberosus) were obtained by decoction, infusion, and maceration. LC/HRMS data were submitted to the GNPS platform and evaluated using CFM in order to confirm the structures. RESULTS The HRMS-GNPS/CFM analysis indicated the presence of 23 compounds that were mainly identified as phenolic derivatives from quercetin and myricetin, of which 21 are unedited in the Connarus genus. Thus, from the analyses performed, we can identify different compounds with pharmacological potential, as well as the most suitable forms of extraction. CONCLUSION Using HRMS-GNPS/CFM, 21 unpublished compounds were identified in the studied species. Therefore, our combination of data analysis techniques can be used to determine their chemical composition.
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Affiliation(s)
| | - Paulo Roberto Dos Santos
- Laboratory of Biotechnology of Natural and Synthetics Products, University of Caxias do Sul, Brazil
| | | | - Luana Minello
- Laboratory of Oxidative Stress and Antioxidants, Biotechnology Institute, University of Caxias do Sul, Brazil
| | | | - Vinicius Castro Souza
- Departamento de Ciências Biológicas. Escola Superior de Agricultura "Luiz de Queiroz"-ESALQ, University of São Paulo-USP, Brazil
| | - Mirian Salvador
- Laboratory of Oxidative Stress and Antioxidants, Biotechnology Institute, University of Caxias do Sul, Brazil
| | - Sidnei Moura
- Laboratory of Biotechnology of Natural and Synthetics Products, University of Caxias do Sul, Brazil
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Nunes Alves Paim LF, Patrocínio Toledo CA, Lima da Paz JR, Picolotto A, Ballardin G, Souza VC, Salvador M, Moura S. Connaraceae: An updated overview of research and the pharmacological potential of 39 species. J Ethnopharmacol 2020; 261:112980. [PMID: 32422354 DOI: 10.1016/j.jep.2020.112980] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 02/06/2020] [Revised: 05/01/2020] [Accepted: 05/12/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE An interdisciplinary scientific investigation of biologically active agents is fundamental to search for natural substances with therapeutic action. This review collected the most relevant information on traditional knowledge related to the use of plants of the Connaraceae family. This work is the first to compile all the published ethnobotanical, chemical, pharmacological, and toxicological information about this important plant family. AIM OF THE STUDY Our objective was to provide the scientific community with an up-to-date overview of the pharmacological potential of Connaraceae species. MATERIAL AND METHODS We searched NCBI Pubmed Central, Google Scholar, Scientific Electronic Library Online (SciELO), ScienceDirect, SciFinder, and Scopus databases to review the research on ethnobotanical, chemical, pharmacognostical, pharmacological, and toxicological studies with Connaraceaes. Books that address the theme were also included. DISCUSSION AND CONCLUSION The literature review indicated that 39 species of Connaraceaes have pharmacological potentiality. Ethnobotany reports listed 36 of the 39 species discussed. Pharmacognostical studies have been conducted with 23 species and isolates, and chemical compounds have been identified for only 15 species. At least one study has been published concerning the pharmacological activities for 20 of the 39 species analyzed. For Agelaea pentagyna, Cnestis ferruginea, Connars suberosus, and Rourea minor, pharmacological activity experiments were performed using isolated compounds, which have the highest current pharmacological potential. Studies employing a toxicological approach cover only 10 of the 39 Connaraceaes species. Thus, scientific community should conduct much more research for a broader understanding of this plant family.
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Affiliation(s)
| | | | | | - Aline Picolotto
- Laboratory of Biotechnology of Natural and Synthetics Products - University of Caxias do Sul, Brazil
| | - Guilherme Ballardin
- Laboratory of Biotechnology of Natural and Synthetics Products - University of Caxias do Sul, Brazil
| | - Vinicius Castro Souza
- Programa de Pós-Graduação em Biologia Vegetal, Campinas State University, UNICAMP, Brazil
| | - Mirian Salvador
- Laboratory of Oxidative Stress and Antioxidants, Biotechnology Institute, University of Caxias do Sul, Brazil
| | - Sidnei Moura
- Laboratory of Biotechnology of Natural and Synthetics Products - University of Caxias do Sul, Brazil.
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Akindele AJ, Iyamu EA, Dutt P, Satti NK, Adeyemi OO. Ameliorative Effect of Hydroethanolic Leaf Extract of Byrsocarpus coccineus in Alcohol- and Sucrose-Induced Hypertension in Rats. J Tradit Complement Med 2014; 4:177-88. [PMID: 25161923 PMCID: PMC4142456 DOI: 10.4103/2225-4110.129562] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Hypertension remains a major health problem worldwide considering the prevalence of morbidity and mortality. Plants remain a reliable source of efficacious and better tolerated drugs and botanicals. This study was designed to investigate the effect of the chemo-profiled hydroethanolic leaf extract of Byrsocarpus coccineus in ethanol- and sucrose-induced hypertension. Groups of rats were treated orally (p.o.) with distilled water (10 ml/kg), ethanol (35%; 3 g/kg), sucrose (5-7%), and B. coccineus (100, 200, and 400 mg/kg), and nifedipine together with ethanol and sucrose separately for 8 weeks. At the end of the treatment period, blood pressure and heart rate of rats were determined. Blood was collected for serum biochemical parameters and lipid profile assessment, and the liver, aorta, kidney, and heart were harvested for estimation of in vivo antioxidants and malondialdehyde (MDA). Results obtained in this study showed that B. coccineus at the various doses administered reduced the systolic, diastolic, and arterial blood pressure elevated by ethanol and sucrose. Also, the extract reversed the reduction in catalase (CAT), reduced glutathione (GSH), glutathione peroxidase (GPx), and superoxide dismutase (SOD) induced by ethanol and sucrose. The level of MDA was reduced compared to the ethanol- and sucrose-induced hypertensive group. With respect to lipid profile, administration of B. coccineus at the various doses reduced the levels of triglycerides, low-density lipoprotein (LDL), cholesterol, and atherogenic indices, compared to the ethanol and sucrose groups. In conclusion the hydroethanolic leaf extract of B. coccineus exerted significant antihypertensive effect and this is probably related to the antioxidant property and improvement of lipid profile observed in this study.
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Affiliation(s)
- Abidemi J. Akindele
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, P. M. B. 12003 Lagos, Nigeria
| | - Endurance A. Iyamu
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, P. M. B. 12003 Lagos, Nigeria
| | - Prabhu Dutt
- Natural Products Chemistry (Plants) Division, Indian Institute of Integrative Medicine (Council of Scientific and Industrial Research), Canal Road, Jammu - 180001, India
| | - Naresh K. Satti
- Natural Products Chemistry (Plants) Division, Indian Institute of Integrative Medicine (Council of Scientific and Industrial Research), Canal Road, Jammu - 180001, India
| | - Olufunmilayo O. Adeyemi
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, P. M. B. 12003 Lagos, Nigeria
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Kalegari M, Cerutti ML, Macedo-Júnior SJ, Bobinski F, Miguel MD, Eparvier V, Santos ARS, Stien D, Miguel OG. Chemical composition and antinociceptive effect of aqueous extract from Rourea induta Planch. leaves in acute and chronic pain models. J Ethnopharmacol 2014; 153:801-809. [PMID: 24680990 DOI: 10.1016/j.jep.2014.03.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 12/26/2013] [Revised: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rourea induta Planch. is a small tree or shrub growing wild in Brazil and belonging to the Connaraceae family. It is used for the treatment of Chagas disease and as antirheumatic in folk medicine. This study was designed to investigate the antinociceptive activity of the aqueous extract (AERi) of Rourea induta leaves in rodents, as well as isolate and identify components that can be responsible for its effect. MATERIAL AND METHODS The antinociceptive effect of orally administered AERi was evaluated in behavioral models of acute (formalin) and chronic [complete Freund׳s adjuvant (CFA)] pain in mice. We also investigated the possible involvement of opioid receptors and proinflammatory cytokines (interleukin-1β and tumor necrosis factor-α) in the antinociceptive effect of the AERi. In addition, a nonspecific effect of AERi was evaluated by measuring locomotor activity and corporal temperature. Finally, we performed a phytochemical analysis of AERi. RESULTS HPLC titration revealed the presence of hyperin (21.6 mg/g), quercetin-3-O-β-xyloside (4.4 mg/g), quercetin-3-O-α-arabinofuranoside (12.0 mg/g), and quercetin (2.1 mg/g). It was also possible to isolate minor constituents׳ chlorogenic acid, neochlorogenic acid and procyanidin C1. The oral administration of AERi (100 mg/kg) significantly inhibited the neurogenic (37 ± 5%) and inflammatory (34 ± 7%) phases of formalin-induced pain. Acute and repeated treatment of animals with AERi (100 mg/kg, p.o.) once a day markedly reduced the mechanical hypersensitivity response induced by CFA, and this effect was evident until the day 10. Moreover, repeated treatment with AERi (100 mg/kg, p.o.) significantly reduced the levels of IL-1β and TNF-α in the paw (22 ± 7% and 50 ± 19%) and in the spinal cord (100% and 100%) when compared to the CFA group. The AERi (100 mg/kg, p.o.) markedly reduced biting behavior induced by intrathecal injection of TNF-α (81 ± 11%). Finally, the effect of AERi was not associated with changes in locomotor activity or the corporal temperature of animals. CONCLUSION These data show that aqueous extract of Rourea induta has significant antinociceptive action, which seems to be associated with an inhibition of pro-inflammatory cytokines activated pathways. These findings support the ethnomedical uses of this plant.
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Affiliation(s)
- Milena Kalegari
- Departamento de Farmácia, Setor de Ciências da Saúde, Universidade Federal do Paraná, Av. Prefeito Lothário Meissner, 632 Jardim Botânico, 80210-170 Curitiba, PR, Brazil; Institut de Chimie de Substances Naturelles, CNRS, 1 Avenue de La Terrasse, 91198 Gif-sur-Yvette, France
| | - Murilo Luiz Cerutti
- Laboratório de Neurobiologia da Dor e Inflamação, Departamento de Ciências Fisiológicas, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil
| | - Sérgio José Macedo-Júnior
- Laboratório de Neurobiologia da Dor e Inflamação, Departamento de Ciências Fisiológicas, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil; Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil
| | - Franciane Bobinski
- Laboratório de Neurobiologia da Dor e Inflamação, Departamento de Ciências Fisiológicas, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil
| | - Marilis Dallarmi Miguel
- Departamento de Farmácia, Setor de Ciências da Saúde, Universidade Federal do Paraná, Av. Prefeito Lothário Meissner, 632 Jardim Botânico, 80210-170 Curitiba, PR, Brazil
| | - Véronique Eparvier
- Institut de Chimie de Substances Naturelles, CNRS, 1 Avenue de La Terrasse, 91198 Gif-sur-Yvette, France
| | - Adair Roberto Soares Santos
- Laboratório de Neurobiologia da Dor e Inflamação, Departamento de Ciências Fisiológicas, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil.
| | - Didier Stien
- Institut de Chimie de Substances Naturelles, CNRS, 1 Avenue de La Terrasse, 91198 Gif-sur-Yvette, France
| | - Obdulio Gomes Miguel
- Departamento de Farmácia, Setor de Ciências da Saúde, Universidade Federal do Paraná, Av. Prefeito Lothário Meissner, 632 Jardim Botânico, 80210-170 Curitiba, PR, Brazil
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