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da Rocha ECM, da Rocha JAP, da Costa RA, da Costa ADSS, Barbosa EDS, Josino LPC, Brasil LDSNDS, Vendrame LFO, Machado AK, Fagan SB, Brasil DDSB. High-Throughput Molecular Modeling and Evaluation of the Anti-Inflammatory Potential of Açaí Constituents against NLRP3 Inflammasome. Int J Mol Sci 2024; 25:8112. [PMID: 39125681 PMCID: PMC11311378 DOI: 10.3390/ijms25158112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Revised: 07/15/2024] [Accepted: 07/21/2024] [Indexed: 08/12/2024] Open
Abstract
The search for bioactive compounds in natural products holds promise for discovering new pharmacologically active molecules. This study explores the anti-inflammatory potential of açaí (Euterpe oleracea Mart.) constituents against the NLRP3 inflammasome using high-throughput molecular modeling techniques. Utilizing methods such as molecular docking, molecular dynamics simulation, binding free energy calculations (MM/GBSA), and in silico toxicology, we compared açaí compounds with known NLRP3 inhibitors, MCC950 and NP3-146 (RM5). The docking studies revealed significant interactions between açaí constituents and the NLRP3 protein, while molecular dynamics simulations indicated structural stabilization. MM/GBSA calculations demonstrated favorable binding energies for catechin, apigenin, and epicatechin, although slightly lower than those of MCC950 and RM5. Importantly, in silico toxicology predicted lower toxicity for açaí compounds compared to synthetic inhibitors. These findings suggest that açaí-derived compounds are promising candidates for developing new anti-inflammatory therapies targeting the NLRP3 inflammasome, combining efficacy with a superior safety profile. Future research should include in vitro and in vivo validation to confirm the therapeutic potential and safety of these natural products. This study underscores the value of computational approaches in accelerating natural product-based drug discovery and highlights the pharmacological promise of Amazonian biodiversity.
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Affiliation(s)
- Elaine Cristina Medeiros da Rocha
- Laboratory of Modeling and Computational Chemistry, Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Bragança, Bragança 68600-000, PA, Brazil;
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
- Graduate Program in Chemistry, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil
| | - João Augusto Pereira da Rocha
- Laboratory of Modeling and Computational Chemistry, Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Bragança, Bragança 68600-000, PA, Brazil;
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
- Graduate Program in Chemistry, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém 66075-110, PA, Brazil;
| | - Renato Araújo da Costa
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
- Laboratory of Molecular Biology, Evolution and Microbiology, Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Abaetetuba, Abaetetuba 68440-000, PA, Brazil
| | - Andreia do Socorro Silva da Costa
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
- Laboratory of Molecular Biology, Evolution and Microbiology, Federal Institute of Education, Science and Technology of Pará (IFPA) Campus Abaetetuba, Abaetetuba 68440-000, PA, Brazil
| | - Edielson dos Santos Barbosa
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
| | - Luiz Patrick Cordeiro Josino
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém 66075-110, PA, Brazil;
| | - Luciane do Socorro Nunes dos Santos Brasil
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
| | - Laura Fernanda Osmari Vendrame
- Graduate Program in Nanosciences, Franciscana University, Santa Maria 97010-032, RS, Brazil; (L.F.O.V.); (A.K.M.); (S.B.F.)
| | - Alencar Kolinski Machado
- Graduate Program in Nanosciences, Franciscana University, Santa Maria 97010-032, RS, Brazil; (L.F.O.V.); (A.K.M.); (S.B.F.)
| | - Solange Binotto Fagan
- Graduate Program in Nanosciences, Franciscana University, Santa Maria 97010-032, RS, Brazil; (L.F.O.V.); (A.K.M.); (S.B.F.)
| | - Davi do Socorro Barros Brasil
- Laboratory of Biosolutions and Bioplastics of the Amazon, Graduate Program in Science and Environment, Institute of Exact and Natural Sciences, Federal University of Pará (UFPA), Belém 66075-110, PA, Brazil; (R.A.d.C.); (A.d.S.S.d.C.); (E.d.S.B.); (L.d.S.N.d.S.B.); (D.d.S.B.B.)
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Zothantluanga JH, Chetia D, Rajkhowa S, Umar AK. Unsupervised machine learning, QSAR modelling and web tool development for streamlining the lead identification process of antimalarial flavonoids. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2023; 34:117-146. [PMID: 36744427 DOI: 10.1080/1062936x.2023.2169347] [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: 10/31/2022] [Accepted: 01/10/2023] [Indexed: 06/18/2023]
Abstract
Identification of lead compounds with the traditional laboratory approach is expensive and time-consuming. Nowadays, in silico techniques have emerged as a promising approach for lead identification. In this study, we aim to develop robust and predictive 2D-QSAR models to identify lead flavonoids by predicting the IC50 against Plasmodium falciparum. We applied machine learning algorithms (Principal component analysis followed by K-means clustering) and Pearson correlation analysis to select 9 molecular descriptors (MDs) for model building. We selected and validated the three best QSAR models after execution of multiple linear regression (MLR) 100 times with different combinations of MDs. The developed models have fulfilled the five principles for QSAR models as specified by the Organization for Economic Co-operation and Development. The outcome of the study is a reliable and sustainable in silico method of IC50 (Mean ± SD) prediction that will positively impact the antimalarial drug development process by reducing the money and time required to identify potential antimalarial lead compounds from the class of flavonoids. We also developed a web tool (JazQSAR, https://etflin.com/news/4) to offer an easily accessible platform for the developed QSAR models.
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Affiliation(s)
- J H Zothantluanga
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh, India
| | - D Chetia
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh, India
| | - S Rajkhowa
- Centre for Biotechnology and Bioinformatics, Faculty of Biological Sciences, Dibrugarh University, Dibrugarh, India
| | - A K Umar
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang, Indonesia
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Vah L, Medved T, Grošelj U, Klemenčič M, Podlipnik Č, Štefane B, Wagger J, Novinec M, Svete J. Regioselective Synthesis of 5- and 3-Hydroxy- N-Aryl-1 H-Pyrazole-4-Carboxylates and Their Evaluation as Inhibitors of Plasmodium falciparum Dihydroorotate Dehydrogenase. Molecules 2022; 27:4764. [PMID: 35897941 PMCID: PMC9332393 DOI: 10.3390/molecules27154764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/15/2022] [Accepted: 07/17/2022] [Indexed: 02/05/2023] Open
Abstract
In silico evaluation of various regioisomeric 5- and 3-hydroxy-substituted alkyl 1-aryl-1H-pyrazole-4-carboxylates and their acyclic precursors yielded promising results with respect to their binding in the active site of dihydroorotate dehydrogenase of Plasmodium falciparum (PfDHODH). Consequently, four ethyl 1-aryl-5-hydroxy-1H-pyrazole-4-carboxylates and their 3-hydroxy regioisomers were prepared by two-step syntheses via enaminone-type reagents or key intermediates. The synthesis of 5-hydroxy-1H-pyrazoles was carried out using the literature protocol comprising acid-catalyzed transamination of diethyl [(dimethylamino)methylene]malonate with arylhydrazines followed by base-catalyzed cyclization of the intermediate hydrazones. For the synthesis of isomeric methyl 1-aryl-3-hydroxy-1H-pyrazole-4-carboxylates, a novel two-step synthesis was developed. It comprises acylation of hydrazines with methyl malonyl chloride followed by cyclization of the hydrazines with tert-butoxy-bis(dimethylamino)methane. Testing the pyrazole derivatives for the inhibition of PfDHODH showed that 1-(naphthalene-2-yl)-5-hydroxy-1H-pyrazole-4-carboxylate and 1-(naphthalene-2-yl)-, 1-(2,4,6-trichlorophenyl)-, and 1-[4-(trifluoromethyl)phenyl]-3-hydroxy-1H-pyrazole-4-carboxylates (~30% inhibition) were slightly more potent than a known inhibitor, diethyl α-{[(1H-indazol-5-yl)amino]methylidene}malonate (19% inhibition).
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Affiliation(s)
| | | | | | | | | | | | | | - Marko Novinec
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia; (L.V.); (T.M.); (U.G.); (M.K.); (Č.P.); (B.Š.); (J.W.)
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia; (L.V.); (T.M.); (U.G.); (M.K.); (Č.P.); (B.Š.); (J.W.)
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Olanlokun JO, Adetutu JA, Olorunsogo OO. ln vitro inhibition of beta-hematin formation and in vivo effects of Diospyros mespiliformis and Mondia whitei methanol extracts on chloroquine-susceptible Plasmodium berghei-induced malaria in mice. Interv Med Appl Sci 2021; 11:197-206. [PMID: 36343283 PMCID: PMC9467386 DOI: 10.1556/1646.2020.00001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 03/30/2018] [Accepted: 10/24/2019] [Indexed: 11/25/2022] Open
Abstract
Background and aim This study was carried out to investigate antiplasmodial activities of Diospyros mespiliformis (DM) and Mondia whitei (MW) in Plasmodium berghei-infected mice. Materials and methods Air-dried stem of DM and root of MW were soaked in methanol, decanted and concentrated to give extracts. Parts of these extracts were partitioned successively to give dichloromethane, ethylacetate and methanol fractions. Mice (18 ± 3 g) were infected with Plasmodium berghei-infected erythrocytes from a donor mouse and were treated with the extracts, while the drug control group received 10 mg/kg body weight of artesunate and the parasitized control received the vehicle (5% v/v DMSO). Percentage parasitemia and clearance were estimated from thin films of blood smear. Hematological parameters were determined using standard methods. Both extracts were also tested on in vitro inhibition of β-hematin formation. Results, discussion and conclusion Results showed that DM had the least percentage parasitemia (0.67%) and highest percentage parasite clearance (84.7%) while the MW had 0.89% percentage parasitemia and 79.7% clearance at the highest dose used after the seventh day relative to untreated control. The cell free antiplasmodial activity of the fractions and extracts of both DM and MW revealed that DM significantly inhibited β-hematin formation than MW. The packed cell volume, white blood cell count, Lymphocyte, Eosinophil, Monocyte and Neutrophil significantly increased in the treated groups compared with the control. The results showed that the DM had higher antiplasmodial activity.
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Affiliation(s)
- John Oludele Olanlokun
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria
| | - Janet Adenike Adetutu
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria
| | - Olabode Olufunso Olorunsogo
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria
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Olanlokun JO, Babarinde CO, Olorunsogo OO. Antimalarial properties and preventive effects on mitochondrial dysfunction by extract and fractions of Phyllanthus amarus (Schum. and Thonn) in Plasmodium berghei-infected mice. J Basic Clin Physiol Pharmacol 2020; 32:255-266. [PMID: 33161386 DOI: 10.1515/jbcpp-2020-0046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 07/25/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVES Broad spectrum antimalarial drugs without deleterious effects on mitochondria are scarce. It is in this regard that we investigated the potency of methanol extract and solvent fractions of Phyllanthus amarus on chloroquine-susceptible and resistant strains of Plasmodium berghei, toxicity and its consequential effects on mitochondrial permeability transition (mPT) pore opening. METHODS Malaria was induced in male Swiss mice with susceptible (NK 65) strain, divided into groups (n=5) and treated with 100, 200 and 400 mg/kg of methanol extract, n-hexane, dichloromethane, ethylacetate and methanol fractions daily for seven days. Percentage parasitemia and parasite clearance were determined microscopically. The two most potent fractions were tested on resistant (ANKA) strains. Heme and hemozoin contents were determined spectrophotometrically. The mPT, mitochondrial ATPase (mATPase) and lipid peroxidation (mLPO) were determined spectrophotometrically. Similar groups of animals were used for toxicity studies. RESULTS Dichloromethane fraction (400 mg/kg) had the highest antimalarial curative effect via least parasitemia (0.49) and high clearance (96.63) compared with the negative control (10.08, 0.00, respectively), had the highest heme and least hemozoin contents (16.23; 0.03) compared with the negative control (8.2, 0.126, respectively). Malaria infection opened the mPT, caused significant increase in mLPO and enhanced mATPase; while dichloromethane fraction reversed these conditions. Serum ALT, AST, ALP, GGT, urea and creatinine of dichloromethane fraction-treated mice decreased relative to control. No significant lesion was noticed in liver and kidney tissue sections. CONCLUSIONS Dichloromethane fraction of Phyllanthus amarus had the highest antimalarial activity with the highest mito-protective effect and it was well tolerated without toxic effects.
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Affiliation(s)
- John Oludele Olanlokun
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, University of Ibadan, Ibadan, Nigeria
| | - Cecilia Opeyemi Babarinde
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, University of Ibadan, Ibadan, Nigeria
| | - Olufunso Olabode Olorunsogo
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, University of Ibadan, Ibadan, Nigeria
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Three Alkaloids from an Apocynaceae Species, Aspidosperma spruceanum as Antileishmaniasis Agents by In Silico Demo-case Studies. PLANTS 2020; 9:plants9080983. [PMID: 32756456 PMCID: PMC7465237 DOI: 10.3390/plants9080983] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 12/27/2022]
Abstract
This paper is focused on demonstrating with a real case that Ethnobotany added to Bioinformatics is a promising tool for new drugs search. It encourages the in silico investigation of "challua kaspi", a medicinal kichwa Amazonian plant (Aspidosperma spruceanum) against a Neglected Tropical Disease, leishmaniasis. The illness affects over 150 million people especially in subtropical regions, there is no vaccination and conventional treatments are unsatisfactory. In attempts to find potent and safe inhibitors of its etiological agent, Leishmania, we recovered the published traditional knowledge on kichwa antimalarials and selected three A. spruceanum alkaloids, (aspidoalbine, aspidocarpine and tubotaiwine), to evaluate by molecular docking their activity upon five Leishmania targets: DHFR-TS, PTR1, PK, HGPRT and SQS enzymes. Our simulation results suggest that aspidoalbine interacts competitively with the five targets, with a greater affinity for the active site of PTR1 than some physiological ligands. Our virtual data also point to the demonstration of few side effects. The predicted binding free energy has a greater affinity to Leishmania proteins than to their homologous in humans (TS, DHR, PKLR, HGPRT and SQS), and there is no match with binding pockets of physiological importance. Keys for the in silico protocols applied are included in order to offer a standardized method replicable in other cases. Apocynaceae having ethnobotanical use can be virtually tested as molecular antileishmaniasis new drugs.
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Devillers J, Devillers H. Toxicity profiling and prioritization of plant-derived antimalarial agents. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2019; 30:801-824. [PMID: 31565973 DOI: 10.1080/1062936x.2019.1665844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/06/2019] [Indexed: 06/10/2023]
Abstract
Human malaria is the most widespread mosquito-borne life-threatening disease worldwide. In the absence of effective vaccines, prevention and treatment of malaria only depend on prophylaxis and drug-based therapy either in monotherapy or in combination. Unfortunately, the number of available antimalarial drugs presenting different mechanisms of action is rather limited. In addition, the appearance of drug-resistance in the parasite strains impacts the efficacy of the treatments. As a result, there is a crucial need to find new drugs to circumvent resistance problems. In the quest to identify new antimalarial agents a huge number of plant-derived compounds (PDCs) have been investigated. Surprisingly in the in silico PDC screening programs, toxicity filters are either never used or so simple that their interest is limited. In this context, the goal of this study was to show how to take advantage of validated toxicity QSAR models for refining the selection of PDCs. From an original data set of 507 PDCs collected from the literature, the use of toxicity filters for endocrine disruption, developmental toxicity, and hepatotoxicity in conjunction with classical pharmacokinetic filters allowed us to obtain a list of 31 compounds of potential interest. The pros and cons of such a strategy have been discussed.
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Affiliation(s)
| | - H Devillers
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay , Jouy-en-Josas , France
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Sousa JKT, Antinarelli LMR, Mendonça DVC, Lage DP, Tavares GSV, Dias DS, Ribeiro PAF, Ludolf F, Coelho VTS, Oliveira-da-Silva JA, Perin L, Oliveira BA, Alvarenga DF, Chávez-Fumagalli MA, Brandão GC, Nobre V, Pereira GR, Coimbra ES, Coelho EAF. A chloroquinoline derivate presents effective in vitro and in vivo antileishmanial activity against Leishmania species that cause tegumentary and visceral leishmaniasis. Parasitol Int 2019; 73:101966. [PMID: 31362122 DOI: 10.1016/j.parint.2019.101966] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/27/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023]
Abstract
The identification of new therapeutics to treat leishmaniasis is desirable, since available drugs are toxic and present high cost and/or poor availability. Therefore, the discovery of safer, more effective and selective pharmaceutical options is of utmost importance. Efforts towards the development of new candidates based on molecule analogs with known biological functions have been an interesting and cost-effective strategy. In this context, quinoline derivatives have proven to be effective biological activities against distinct diseases. In the present study, a new chloroquinoline derivate, AM1009, was in vitro tested against two Leishmania species that cause leishmaniasis. The present study analyzed the necessary inhibitory concentration to preclude 50% of the Leishmania promastigotes and axenic amastigotes (EC50 value), as well as the inhibitory concentrations to preclude 50% of the murine macrophages and human red blood cells (CC50 and RBC50 values, respectively). In addition, the treatment of infected macrophages and the inhibition of infection using pre-treated parasites were also investigated, as was the mechanism of action of the molecule in L. amazonensis. To investigate the in vivo therapeutic effect, BALB/c mice were infected with L. amazonensis and later treated with AM1009. Parasitological and immunological parameters were also evaluated. Clioquinol, a known antileishmanial quinoline derivate, and amphotericin B (AmpB), were used as molecule and drug controls, respectively. Results in both in vitro and in vivo experiments showed a better and more selective action of AM1009 to kill the in vitro parasites, as well as in treating infected mice, when compared to results obtained using clioquinol or AmpB. AM1009-treated animals presented significantly lower average lesion diameter and parasite burden in the infected tissue and organs evaluated in this study, as well as a more polarized antileishmanial Th1 immune response and low renal and hepatic toxicity. This result suggests that AM1009 should be considered a possible therapeutic target to be evaluated in future studies for treatment against leishmaniasis.
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Affiliation(s)
- Jessica K T Sousa
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Luciana M R Antinarelli
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Débora V C Mendonça
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Daniela P Lage
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Grasiele S V Tavares
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Daniel S Dias
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Patrícia A F Ribeiro
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Fernanda Ludolf
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Vinicio T S Coelho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - João A Oliveira-da-Silva
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Luísa Perin
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Bianka A Oliveira
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, 30535-901 Belo Horizonte, Minas Gerais, Brazil
| | - Denis F Alvarenga
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, 30535-901 Belo Horizonte, Minas Gerais, Brazil
| | - Miguel A Chávez-Fumagalli
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Geraldo C Brandão
- Escola de Farmácia, Universidade Federal de Ouro Preto, 35400-000 Ouro Preto, Minas Gerais, Brazil
| | - Vandack Nobre
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil
| | - Guilherme R Pereira
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, 30535-901 Belo Horizonte, Minas Gerais, Brazil
| | - Elaine S Coimbra
- Departamento de Parasitologia, Microbiologia e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, Minas Gerais, Brazil
| | - Eduardo A F Coelho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, 30130-100 Belo Horizonte, Minas Gerais, Brazil; Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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Mining large databases to find new leads with low similarity to known actives: application to find new DPP-IV inhibitors. Future Med Chem 2019; 11:1387-1401. [PMID: 31298576 DOI: 10.4155/fmc-2018-0597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Aim: Fragment-based drug design or bioisosteric replacement is used to find new actives with low (or no) similarity to existing ones but requires the synthesis of nonexisting compounds to prove their predicted bioactivity. Protein-ligand docking or pharmacophore screening are alternatives but they can become computationally expensive when applied to very large databases such as ZINC. Therefore, fast strategies are necessary to find new leads in such databases. Materials & methods: We designed a computational strategy to find lead molecules with very low (or no) similarity to existing actives and applied it to DPP-IV. Results: The bioactivity assays confirm that this strategy finds new leads for DPP-IV inhibitors. Conclusion: This computational strategy reduces the time of finding new lead molecules.
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Strašek N, Lavrenčič L, Oštrek A, Slapšak D, Grošelj U, Klemenčič M, Brodnik Žugelj H, Wagger J, Novinec M, Svete J. Tetrahydro-1H,5H-pyrazolo[1,2-a]pyrazole-1-carboxylates as inhibitors of Plasmodium falciparum dihydroorotate dehydrogenase. Bioorg Chem 2019; 89:102982. [PMID: 31132601 DOI: 10.1016/j.bioorg.2019.102982] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/29/2019] [Accepted: 05/08/2019] [Indexed: 11/25/2022]
Abstract
The reactions between 5-substituted pyrazolidine-3-ones, aldehydes, and methyl methacrylate provided tetrahydropyrazolo[1,2-a]pyrazole-1-carboxylates as mixtures of syn- and anti-diastereomers. Testing for inhibition of dihydroorotate dehydrogenase of Plasmodium falciparum (PfDHODH) revealed high activity of some anti-isomers of the methyl esters, while the corresponding carboxylic acids and carboxamides were not active. The most active representative, methyl (1S*,3S*,5R*)-1,5-dimethyl-7-oxo-3-phenyltetrahydro-1H,5H-pyrazolo[1,2-a]pyrazole-1-carboxylate (IC50 = 2.9 ± 0.3 μM), also exhibited very high selectivity of the parasite enzyme vs. the human enzyme, PfDHODH/HsDHODH > 350. According to the molecular docking score, this high activity is explainable by synergic interactions of the methyl, phenyl and the CO2Me substituent with the hydrophobic pockets in the active site of the enzyme. The carboxylic acid and carboxamides derived from this compound did not inhibit PfDHODH.
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Affiliation(s)
- Nika Strašek
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Lara Lavrenčič
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Andraž Oštrek
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Dejan Slapšak
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Uroš Grošelj
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Marina Klemenčič
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Helena Brodnik Žugelj
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Jernej Wagger
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Marko Novinec
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia.
| | - Jurij Svete
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia.
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de Lima DA, Andreotti CEL, Antiquera Ferreira F, Pauli KB, da Silva GR, Ribeiro RDCL, Dalsenter PR, Boechat N, Gasparotto Junior A, Lourenço ELB, Lívero FADR. Safety assessment of MEFAS: an innovative hybrid salt of mefloquine and artesunate for malaria treatment. Drug Chem Toxicol 2019; 44:380-385. [PMID: 31060457 DOI: 10.1080/01480545.2019.1607371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Malaria is a global public health problem that causes approximately 445 000 deaths annually worldwide, especially in underdeveloped countries. Because of the high prevalence and mortality of the disease, new and less toxic therapeutic agents need to be developed, such as MEFAS, a low-cost hybrid salt that consists of artesunate and mefloquine. However, the efficacy of MEFAS has been systematically demonstrated, its safety requires further investigation. This study investigated the acute toxicity of MEFAS and its precursors, artesunate, and mefloquine. A total of 42 female Swiss mice were divided into seven groups (n = 6/group) that were treated orally by gavage with vehicle (filtered water, negative control), MEFAS (50, 500, and 1000 mg/kg), and 1:1 concentrations of artesunate + mefloquine (50, 500, and 1000 mg/kg). Clinical signs of toxicity were observed for 14 d after treatment. On day 15, the animals were weighed, deeply anesthetized with isoflurane, and euthanized for subsequent collection of the liver, spleen, and kidneys. The relative organ weights were determined, followed by histopathological analysis. Artesunate + mefloquine produced toxic effects compared with the negative control group, reflected by changes in clinical signs, relative organ weights, and histopathological alterations. In MEFAS-treated animals, no changes were observed compared with the negative control group. These findings demonstrate that MEFAS is safer than artesunate + mefloquine after acute administration in mice.
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Affiliation(s)
- Daniely Alves de Lima
- Laboratory of Preclinical Research of Natural Products, Paranaense University, Umuarama, Brazil
| | | | | | - Karoline Bach Pauli
- Laboratory of Preclinical Research of Natural Products, Paranaense University, Umuarama, Brazil
| | - Gustavo Ratti da Silva
- Laboratory of Preclinical Research of Natural Products, Paranaense University, Umuarama, Brazil
| | | | | | - Nubia Boechat
- Laboratory of Organic Synthesis, Institute of Technology and Pharmaceuticals, FIOCRUZ Farmanguinhos/RJ, Rio de Janeiro, Brazil
| | - Arquimedes Gasparotto Junior
- Laboratory of Electrophysiology and Cardiovascular Pharmacology, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, Brazil
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Sivaranjani M, Leskinen K, Aravindraja C, Saavalainen P, Pandian SK, Skurnik M, Ravi AV. Deciphering the Antibacterial Mode of Action of Alpha-Mangostin on Staphylococcus epidermidis RP62A Through an Integrated Transcriptomic and Proteomic Approach. Front Microbiol 2019; 10:150. [PMID: 30787919 PMCID: PMC6372523 DOI: 10.3389/fmicb.2019.00150] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 01/21/2019] [Indexed: 11/25/2022] Open
Abstract
Background: Alpha-mangostin (α-MG) is a natural xanthone reported to exhibit rapid bactericidal activity against Gram-positive bacteria, and may therefore have potential clinical application in healthcare sectors. This study sought to identify the impact of α-MG on Staphylococcus epidermidis RP62A through integrated advanced omic technologies. Methods: S. epidermidis was challenged with sub-MIC (0.875 μg/ml) of α-MG at various time points and the differential expression pattern of genes/proteins were analyzed in the absence and presence of α-MG using RNA sequencing and LC-MS/MS experiments. Bioinformatic tools were used to categorize the biological processes, molecular functions and KEGG pathways of differentially expressed genes/proteins. qRT-PCR was employed to validate the results obtained from these analyses. Results: Transcriptomic and proteomic profiling of α-MG treated cells indicated that genes/proteins affected by α-MG treatment were associated with diverse cellular functions. The greatest reduction in expression was observed in transcription of genes conferring cytoplasmic membrane integrity (yidC2, secA and mscL), cell division (ftsY and divlB), teichoic acid biosynthesis (tagG and dltA), fatty-acid biosynthesis (accB, accC, fabD, fabH, fabI, and fabZ), biofilm formation (icaA) and DNA replication and repair machinery (polA, polC, dnaE, and uvrA). Those with increased expression were involved in oxidative (katA and sodA) and cellular stress response (clpB, clpC, groEL, and asp23). The qRT-PCR analysis substantiated the results obtained from transcriptomic and proteomic profiling studies. Conclusion: Combining transcriptomic and proteomic methods provided comprehensive information about the antibacterial mode of action of α-MG. The obtained results suggest that α-MG targets S. epidermidis through multifarious mechanisms, and especially prompts that loss of cytoplasmic membrane integrity leads to rapid onset of bactericidal activity.
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Affiliation(s)
| | - Katarzyna Leskinen
- Department of Bacteriology and Immunology, Medicum, Research Programs Unit, Immunobiology Research Program, University of Helsinki, Helsinki, Finland
| | | | - Päivi Saavalainen
- Department of Bacteriology and Immunology, Medicum, Research Programs Unit, Immunobiology Research Program, University of Helsinki, Helsinki, Finland
| | | | - Mikael Skurnik
- Department of Bacteriology and Immunology, Medicum, Research Programs Unit, Immunobiology Research Program, University of Helsinki, Helsinki, Finland
- Division of Clinical Microbiology, Helsinki University Hospital, HUSLAB, Helsinki, Finland
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A. Elnakady Y, Chatterjee I, Bischoff M, Rohde M, Josten M, Sahl HG, Herrmann M, Müller R. Investigations to the Antibacterial Mechanism of Action of Kendomycin. PLoS One 2016; 11:e0146165. [PMID: 26795276 PMCID: PMC4721675 DOI: 10.1371/journal.pone.0146165] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 12/14/2015] [Indexed: 11/25/2022] Open
Abstract
Purpose The emergence of bacteria that are resistant to many currently used drugs emphasizes the need to discover and develop new antibiotics that are effective against such multi-resistant strains. Kendomycin is a novel polyketide that has a unique quinone methide ansa structure and various biological properties. This compound exhibits strong antibacterial activity against Gram-negative and Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). Despite the promise of kendomycinin in several therapeutic areas, its mode of action has yet to be identified. Methods In this study, we used a multidisciplinary approach to gain insight into the antibacterial mechanism of this compound. Results The antibacterial activity of kendomycin appears to be bacteriostatic rather than bactericidal. Kendomycin inhibited the growth of the MRSA strain COL at a low concentration (MIC of 5 μg/mL). Proteomic analysis and gene transcription profiling of kendomycin-treated cells indicated that this compound affected the regulation of numerous proteins and genes involved in central metabolic pathways, such as the tricarboxylic acid (TCA) cycle (SdhA) and gluconeogenesis (PckA and GapB), cell wall biosynthesis and cell division (FtsA, FtsZ, and MurAA), capsule production (Cap5A and Cap5C), bacterial programmed cell death (LrgA and CidA), the cellular stress response (ClpB, ClpC, ClpP, GroEL, DnaK, and GrpE), and oxidative stress (AhpC and KatA). Electron microscopy revealed that kendomycin strongly affected septum formation during cell division. Most kendomycin-treated cells displayed incomplete septa with abnormal morphology. Conclusions Kendomycin might directly or indirectly affect the cell division machinery, protein stability, and programmed cell death in S. aureus. Additional studies are still needed to obtain deeper insight into the mode of action of kendomycin.
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Affiliation(s)
- Yasser A. Elnakady
- Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
- Faculty of Science, Zoology Department, King Saud University, Riyadh, Saudi Arabia
| | - Indranil Chatterjee
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Manfred Rohde
- Department of Medical Microbiology, Helmholtz Center for Infection Research, Braunschweig, Germany
| | - Michaele Josten
- Department of Medical Microbiology, Bonn University, Bonn, Germany
| | - Hans-Georg Sahl
- Department of Medical Microbiology, Bonn University, Bonn, Germany
| | - Mathias Herrmann
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Rolf Müller
- Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
- * E-mail:
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Tseng TS, Lee YC, Hsiao NW, Liu YR, Tsai KC. Comparative study between 3D-QSAR and Docking-Based Pharmacophore models for potent Plasomodium falciparum dihydroorotate dehydrogenase inhibitors. Bioorg Med Chem Lett 2016; 26:265-271. [DOI: 10.1016/j.bmcl.2015.12.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/03/2015] [Accepted: 12/12/2015] [Indexed: 12/17/2022]
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Lima RBS, Rocha e Silva LF, Melo MRS, Costa JS, Picanço NS, Lima ES, Vasconcellos MC, Boleti APA, Santos JMP, Amorim RCN, Chaves FCM, Coutinho JP, Tadei WP, Krettli AU, Pohlit AM. In vitro and in vivo anti-malarial activity of plants from the Brazilian Amazon. Malar J 2015; 14:508. [PMID: 26682750 PMCID: PMC4683771 DOI: 10.1186/s12936-015-0999-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 11/19/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The anti-malarials quinine and artemisinin were isolated from traditionally used plants (Cinchona spp. and Artemisia annua, respectively). The synthetic quinoline anti-malarials (e.g. chloroquine) and semi-synthetic artemisinin derivatives (e.g. artesunate) were developed based on these natural products. Malaria is endemic to the Amazon region where Plasmodium falciparum and Plasmodium vivax drug-resistance is of concern. There is an urgent need for new anti-malarials. Traditionally used Amazonian plants may provide new treatments for drug-resistant P. vivax and P. falciparum. Herein, the in vitro and in vivo antiplasmodial activity and cytotoxicity of medicinal plant extracts were investigated. METHODS Sixty-nine extracts from 11 plant species were prepared and screened for in vitro activity against P. falciparum K1 strain and for cytotoxicity against human fibroblasts and two melanoma cell lines. Median inhibitory concentrations (IC50) were established against chloroquine-resistant P. falciparum W2 clone using monoclonal anti-HRPII (histidine-rich protein II) antibodies in an enzyme-linked immunosorbent assay. Extracts were evaluated for toxicity against murine macrophages (IC50) and selectivity indices (SI) were determined. Three extracts were also evaluated orally in Plasmodium berghei-infected mice. RESULTS High in vitro antiplasmodial activity (IC50 = 6.4-9.9 µg/mL) was observed for Andropogon leucostachyus aerial part methanol extracts, Croton cajucara red variety leaf chloroform extracts, Miconia nervosa leaf methanol extracts, and Xylopia amazonica leaf chloroform and branch ethanol extracts. Paullinia cupana branch chloroform extracts and Croton cajucara red variety leaf ethanol extracts were toxic to fibroblasts and or melanoma cells. Xylopia amazonica branch ethanol extracts and Zanthoxylum djalma-batistae branch chloroform extracts were toxic to macrophages (IC50 = 6.9 and 24.7 µg/mL, respectively). Andropogon leucostachyus extracts were the most selective (SI >28.2) and the most active in vivo (at doses of 250 mg/kg, 71% suppression of P. berghei parasitaemia versus untreated controls). CONCLUSIONS Ethnobotanical or ethnopharmacological reports describe the anti-malarial use of these plants or the antiplasmodial activity of congeneric species. No antiplasmodial activity has been demonstrated previously for the extracts of these plants. Seven plants exhibit in vivo and or in vitro anti-malarial potential. Future work should aim to discover the anti-malarial substances present.
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Affiliation(s)
- Renata B. S. Lima
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil ,Programa de Pós-graduação em Biotecnologia, Universidade Federal do Amazonas, Avenida Gal. Rodrigo Otávio Jordão Ramos, 3000, Coroado I, Campus Universitário, Bloco M, Setor Sul, 69077-000 Manaus, Amazonas Brazil ,Centro Universitário do Norte, Rua Dez de Julho, 873, Centro, 69010-060 Manaus, Amazonas Brazil
| | - Luiz F. Rocha e Silva
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil ,Programa de Pós-graduação em Biotecnologia, Universidade Federal do Amazonas, Avenida Gal. Rodrigo Otávio Jordão Ramos, 3000, Coroado I, Campus Universitário, Bloco M, Setor Sul, 69077-000 Manaus, Amazonas Brazil ,Centro Universitário do Norte, Rua Dez de Julho, 873, Centro, 69010-060 Manaus, Amazonas Brazil
| | - Marcia R. S. Melo
- Escola Superior de Ciências da Saúde, Universidade Estadual do Amazonas, Avenida Carvalho Leal, 1777, Cachoeirinha, 69065-001 Manaus, Amazonas Brazil
| | - Jaqueline S. Costa
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil
| | - Neila S. Picanço
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil ,Programa de Pós-graduação em Biotecnologia, Universidade Federal do Amazonas, Avenida Gal. Rodrigo Otávio Jordão Ramos, 3000, Coroado I, Campus Universitário, Bloco M, Setor Sul, 69077-000 Manaus, Amazonas Brazil
| | - Emerson S. Lima
- Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-000 Manaus, Amazonas Brazil
| | - Marne C. Vasconcellos
- Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-000 Manaus, Amazonas Brazil
| | - Ana Paula A. Boleti
- Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-000 Manaus, Amazonas Brazil
| | - Jakeline M. P. Santos
- Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-000 Manaus, Amazonas Brazil
| | - Rodrigo C. N. Amorim
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil
| | - Francisco C. M. Chaves
- Embrapa Amazônia Ocidental, Rodovia AM-010, Km 29 (Estrada Manaus/Itacoatiara), Caixa Postal 319, 69010-970 Manaus, Amazonas Brazil
| | - Julia P. Coutinho
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Avenida Augusto de Lima, 1715, Barro Preto, 30190-002 Belo Horizonte, Minas Gerais Brazil
| | - Wanderli P. Tadei
- Laboratório de Malária e Dengue, Coordenação de Sociedade, Ambiente e Saúde, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil
| | - Antoniana U. Krettli
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Avenida Augusto de Lima, 1715, Barro Preto, 30190-002 Belo Horizonte, Minas Gerais Brazil
| | - Adrian M. Pohlit
- Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brazil
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Frausin G, Hidalgo ADF, Lima RBS, Kinupp VF, Ming LC, Pohlit AM, Milliken W. An ethnobotanical study of anti-malarial plants among indigenous people on the upper Negro River in the Brazilian Amazon. JOURNAL OF ETHNOPHARMACOLOGY 2015. [PMID: 26216513 DOI: 10.1016/j.jep.2015.07.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
BACKGROUND In this article we present the plants used for the treatment of malaria and associated symptoms in Santa Isabel do Rio Negro in the Brazilian Amazon. The region has important biological and cultural diversities including more than twenty indigenous ethnic groups and a strong history in traditional medicine. OBJECTIVE The aims of this study are to survey information in the Baniwa, Baré, Desana, Piratapuia, Tariana, Tukano, Tuyuca and Yanomami ethnic communities and among caboclos (mixed-ethnicity) on (a) plant species used for the treatment of malaria and associated symptoms, (b) dosage forms and (c) distribution of these anti-malarial plants in the Amazon. METHODS Information was obtained through classical ethnobotanical and ethnopharmacological methods from interviews with 146 informants in Santa Isabel municipality on the upper Negro River, Brazil. RESULTS Fifty-five mainly native neotropical plant species from 34 families were in use. The detailed uses of these plants were documented. The result was 187 records (64.5%) of plants for the specific treatment of malaria, 51 records (17.6%) of plants used in the treatment of liver problems and 29 records (10.0%) of plants used in the control of fevers associated with malaria. Other uses described were blood fortification ('dar sangue'), headache and prophylaxis. Most of the therapeutic preparations were decoctions and infusions based on stem bark, root bark and leaves. These were administered by mouth. In some cases, remedies were prepared with up to three different plant species. Also, plants were used together with other ingredients such as insects, mammals, gunpowder and milk. CONCLUSION This is the first study on the anti-malarial plants from this region of the Amazon. Aspidosperma spp. and Ampelozizyphus amazonicus Ducke were the most cited species in the communities surveyed. These species have experimental proof supporting their anti-malarial efficacy. The dosage of the therapeutic preparations depends on the kind of plant, quantity of plant material available, the patient's age (children and adults) and the local expert. The treatment time varies from a single dose to up to several weeks. Most anti-malarial plants are domesticated or grow spontaneously. They are grown in home gardens, open areas near the communities, clearings and secondary forests, and wild species grow in areas of seasonally flooded wetlands and terra firme ('solid ground') forest, in some cases in locations that are hard to access. Traditional knowledge of plants was found to be falling into disuse presumably as a consequence of the local official health services that treat malaria in the communities using commercial drugs. Despite this, some species are used in the prevention of this disease and also in the recovery after using conventional anti-malarial drugs.
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Affiliation(s)
- Gina Frausin
- Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, CEP 69067-375 Manaus, Amazonas, Brazil.
| | - Ari de Freitas Hidalgo
- Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Avenida General Rodrigo Otávio Jordão Ramos, 6200, Coroado I, CEP 69077-000 Manaus, Amazonas, Brazil.
| | - Renata Braga Souza Lima
- Programa de Pós-graduação em Biotecnologia, Universidade Federal do Amazonas, Avenida General Rodrigo Otavio Jordão Ramos, 6200, Coroado I, CEP 69077-000 Manaus, Amazonas, Brazil.
| | - Valdely Ferreira Kinupp
- Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Avenida Ferreira Pena, 1109, Centro, CEP 69025-010 Manaus, Amazonas, Brazil.
| | - Lin Chau Ming
- Faculdade de Ciências Agronômicas, Universidade Estadual Paulista "Júlio de Mesquita Filho", Fazenda Experimental Lageado, Rua José Barbosa de Barros, 1780, Caixa Postal 237, CEP 18610-307 Botucatu, São Paulo, Brazil.
| | - Adrian Martin Pohlit
- Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, CEP 69067-375 Manaus, Amazonas, Brazil.
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Charneau S, de Mesquita ML, Bastos IMD, Santana JM, de Paula JE, Grellier P, Espindola LS. In vitro investigation of Brazilian Cerrado plant extract activity against Plasmodium falciparum, Trypanosoma cruzi and T. brucei gambiense. Nat Prod Res 2015. [PMID: 26222897 DOI: 10.1080/14786419.2015.1055264] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The threatened Brazilian Cerrado biome is an important biodiversity hotspot but still few explored that constitutes a potential reservoir of molecules to treat infectious diseases. We selected eight Cerrado plant species for screening against the erythrocytic stages of Plasmodium falciparum, human intracellular stages of Trypanosoma cruzi and bloodstream forms of T. brucei gambiense, and for their cytotoxicity upon the rat L6-myoblast cell line. Bioassays were performed with 37 hexane, ethyl acetate and ethanol extracts prepared from different plant organs. Activities against parasites were observed for 24 extracts: 9 with anti-P. falciparum, 4 with anti-T. cruzi and 11 with anti-T. brucei gambiense activities. High anti-protozoal activity (IC50 values < 10 μg/mL) without obvious cytotoxicity to L6 cells was observed for eight extracts from plants: Connarus suberosus, Blepharocalyx salicifolius, Psidium laruotteanum and Myrsine guianensis. Overall, studies of plant extracts will contribute to increase the biodiversity knowledge essential for Cerrado conservation and sustainable development.
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Affiliation(s)
- Sébastien Charneau
- a Laboratório de Bioquímica e Química de proteínas, Departamento de Biologia Celular , Instituto de Ciências Biológicas, Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
| | - Mariana Laundry de Mesquita
- b Laboratório de Farmacognosia , Faculdade de Ciências da Saúde, Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
| | - Izabela Marques Dourado Bastos
- c Laboratório de Interação Patógeno-Hospedeiro, Departamento de Biologia Celular , Instituto de Ciências Biológicas, Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
| | - Jaime Martins Santana
- c Laboratório de Interação Patógeno-Hospedeiro, Departamento de Biologia Celular , Instituto de Ciências Biológicas, Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
| | - José Elias de Paula
- d Laboratório de Anatomia Vegetal, Instituto de Ciências Biológicas , Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
| | - Philippe Grellier
- e Muséum National d'Histoire Naturelle , UMR 7245 CNRS - Molécules de Communication et Adaptation des Micro-organismes , CP52, 61 rue Buffon , 75231 Paris Cedex 05 , France
| | - Laila Salmen Espindola
- b Laboratório de Farmacognosia , Faculdade de Ciências da Saúde, Universidade de Brasília , Campus Universitário Darcy Ribeiro, Asa Norte, 70910-900 Brasília , DF , Brazil
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In vivo antimalarial activity and mechanisms of action of 4-nerolidylcatechol derivatives. Antimicrob Agents Chemother 2015; 59:3271-80. [PMID: 25801563 DOI: 10.1128/aac.05012-14] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 03/15/2015] [Indexed: 12/30/2022] Open
Abstract
4-Nerolidylcatechol (1) is an abundant antiplasmodial metabolite that is isolated from Piper peltatum roots. O-Acylation or O-alkylation of compound 1 provides derivatives exhibiting improved stability and significant in vitro antiplasmodial activity. The aim of this work was to study the in vitro inhibition of hemozoin formation, inhibition of isoprenoid biosynthesis in Plasmodium falciparum cultures, and in vivo antimalarial activity of several 4-nerolidylcatechol derivatives. 1,2-O,O-Diacetyl-4-nerolidylcatechol (2) inhibited in vitro hemozoin formation by up to 50%. In metabolic labeling studies using [1-(n)-(3)H]geranylgeranyl pyrophosphate, diester 2: significantly inhibited the biosynthesis of isoprenoid metabolites ubiquinone 8, menaquinone 4, and dolichol 12 in cultures of P. falciparum 3D7. Similarly, 2-O-benzyl-4-nerolidylcatechol (3) significantly inhibited the biosynthesis of dolichol 12. P. falciparum in vitro protein synthesis was not affected by compounds 2 or 3. At oral doses of 50 mg per kg of body weight per day, compound 2 suppressed Plasmodium berghei NK65 in infected BALB/c mice by 44%. This in vivo result for derivative 2 represents marked improvement over that obtained previously for natural product 1. Compound 2 was not detected in mouse blood 1 h after oral ingestion or in mixtures with mouse blood/blood plasma in vitro. However, it was detected after in vitro contact with human blood or blood plasma. Derivatives of 4-nerolidylcatechol exhibit parasite-specific modes of action, such as inhibition of isoprenoid biosynthesis and inhibition of hemozoin formation, and they therefore merit further investigation for their antimalarial potential.
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De Monte C, Bizzarri B, Gidaro MC, Carradori S, Mollica A, Luisi G, Granese A, Alcaro S, Costa G, Basilico N, Parapini S, Scaltrito MM, Masia C, Sisto F. Bioactive compounds of Crocus sativus L. and their semi-synthetic derivatives as promising anti-Helicobacter pylori, anti-malarial and anti-leishmanial agents. J Enzyme Inhib Med Chem 2015; 30:1027-33. [DOI: 10.3109/14756366.2014.1001755] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Celeste De Monte
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Rome, Rome, Italy,
| | - Bruna Bizzarri
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Rome, Rome, Italy,
| | - Maria Concetta Gidaro
- Dipartimento di Scienze della Salute, “Magna Graecia” University of Catanzaro, Campus Universitario “S. Venuta”, Viale Europa Loc. Germaneto, Catanzaro, Italy,
| | - Simone Carradori
- Department of Pharmacy, “G. D’Annunzio” University of Chieti-Pescara, Chieti, Italy,
| | - Adriano Mollica
- Department of Pharmacy, “G. D’Annunzio” University of Chieti-Pescara, Chieti, Italy,
| | - Grazia Luisi
- Department of Pharmacy, “G. D’Annunzio” University of Chieti-Pescara, Chieti, Italy,
| | - Arianna Granese
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza University of Rome, Rome, Italy,
| | - Stefano Alcaro
- Dipartimento di Scienze della Salute, “Magna Graecia” University of Catanzaro, Campus Universitario “S. Venuta”, Viale Europa Loc. Germaneto, Catanzaro, Italy,
| | - Giosuè Costa
- Dipartimento di Scienze della Salute, “Magna Graecia” University of Catanzaro, Campus Universitario “S. Venuta”, Viale Europa Loc. Germaneto, Catanzaro, Italy,
| | - Nicoletta Basilico
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, University of Milan, Milan, Italy, and
| | - Silvia Parapini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, University of Milan, Milan, Italy
| | - Maria Maddalena Scaltrito
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, University of Milan, Milan, Italy, and
| | - Carla Masia
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, University of Milan, Milan, Italy, and
| | - Francesca Sisto
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, University of Milan, Milan, Italy, and
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Le HL, Jullian V, Claparols C, Vansteelandt M, Haddad M, Cabou C, Deharo E, Fabre N. Development and validation of liquid chromatography combined with tandem mass spectrometry methods for the quantitation of simalikalactone E in extracts of Quassia amara L. and in mouse blood. PHYTOCHEMICAL ANALYSIS : PCA 2015; 26:111-118. [PMID: 25431121 DOI: 10.1002/pca.2542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 09/02/2014] [Accepted: 09/04/2014] [Indexed: 06/04/2023]
Abstract
INTRODUCTION Simalikalactone E (SkE) from Quassia amara, has been proved to be a valuable anti-malarial and anti-cancer compound. As SkE is very scarce, methods of quantitation are needed in order to optimise its isolation process and to determine pharmacokinetic data. OBJECTIVE To validate methods using liquid chromatography coupled to mass spectrometry for the quantitation of SkE in plant extracts and in biological fluids. METHODS High- and ultrahigh-performance liquid chromatography (UHPLC) coupled to ion trap mass spectrometry (MS) with single ion monitoring detection and to triple quadrupole-linear ion trap tandem mass spectrometry with multiple reaction monitoring detection methods were developed. Validation procedure was realised according to the International Conference on Harmonisation guideline. Methanol extracts of dried Quassia amara leaves, and mouse-blood samples obtained after various routes of administration, were analysed for SkE. RESULTS Methods were validated and gave similar results regarding the content of SkE expressed per kilogram of dry leaves in the traditional decoction (160 ± 12 mg/kg) and in the methanol extract (93 ± 2 mg/kg). The recovery of the analyte from mouse blood ranged from 80.7 to 119.8%. Simalikalactone E was only detected using UHPLC-MS/MS (0.2 ± 0.03 mg/L) in mouse blood after intravenous injection: none was detected following intraperitoneal or oral gavage administration of SkE. CONCLUSION The LC-MS methods were used for the quantitation of SkE in plant extracts and in mouse blood. These methods open the way for further protocol optimisation of SkE extraction and the determination of its pharmacokinetic data.
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Affiliation(s)
- Hong Luyen Le
- Université de Toulouse, UPS, UMR 152 Pharma-DEV, Université Toulouse 3, Faculté des Sciences Pharmaceutiques, F-31062, Toulouse cedex 09, France; Institut de Recherche pour le Développement (IRD), UMR 152 Pharma-DEV, F-31062, Toulouse cedex 09, France
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Xia ZG, Wang RB, Wang DQ, Feng J, Zheng Q, Deng CS, Abdulla S, Guan YY, Ding W, Yao JW, Qian YJ, Bosman A, Newman RD, Ernest T, O’leary M, Xiao N. China-Africa cooperation initiatives in malaria control and elimination. ADVANCES IN PARASITOLOGY 2015; 86:319-37. [PMID: 25476890 PMCID: PMC7149756 DOI: 10.1016/b978-0-12-800869-0.00012-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Malaria has affected human health globally with a significant burden of disease, and also has impeded social and economic development in the areas where it is present. In Africa, many countries have faced serious challenges in controlling malaria, in part due to major limitations in public health systems and primary health care infrastructure. Although China is a developing country, a set of control strategies and measures in different local settings have been implemented successfully by the National Malaria Control Programme over the last 60 years, with a low cost of investment. It is expected that Chinese experience may benefit malaria control in Africa. This review will address the importance and possibility of China–Africa collaboration in control of malaria in targeted African countries, as well as how to proceed toward the goal of elimination where this is technically feasible.
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Affiliation(s)
- Zhi-Gui Xia
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Ru-Bo Wang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Duo-Quan Wang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Jun Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Qi Zheng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Chang-Sheng Deng
- Guangzhou University of Traditional Chinese Medicine, Guangdong, People’s Republic of China
| | | | - Ya-Yi Guan
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Wei Ding
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Jia-Wen Yao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Ying-Jun Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
| | - Andrea Bosman
- Global Malaria Programme, World Health Organization, Geneva, Switzerland
| | | | - Tambo Ernest
- Centre for Sustainable Malaria Control, Faculty of Natural and Environmental Science; Center for Sustainable Malaria Control, Biochemistry Department, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Michael O’leary
- World Health Organization, China Representative Office, Beijing, People’s Republic of China
| | - Ning Xiao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Shanghai, People’s Republic of China
- Corresponding author: E-mail:
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Pereira TB, Rocha e Silva LF, Amorim RCN, Melo MRS, Zacardi de Souza RC, Eberlin MN, Lima ES, Vasconcellos MC, Pohlit AM. In vitro and in vivo anti-malarial activity of limonoids isolated from the residual seed biomass from Carapa guianensis (andiroba) oil production. Malar J 2014; 13:317. [PMID: 25124944 PMCID: PMC4138406 DOI: 10.1186/1475-2875-13-317] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Accepted: 07/19/2014] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Carapa guianensis is a cultivable tree used by traditional health practitioners in the Amazon region to treat several diseases and particularly symptoms related to malaria. Abundant residual pressed seed material (RPSM) results as a by-product of carapa or andiroba oil production. The objective of this study was to evaluate the in vitro and in vivo anti-malarial activity and cytotoxicity of limonoids isolated from C. guaianensis RPSM. METHODS 6α-acetoxyepoxyazadiradione (1), andirobin (2), 6α-acetoxygedunin (3) and 7-deacetoxy-7-oxogedunin (4) (all isolated from RPSM using extraction and chromatography techniques) and 6α-hydroxy-deacetylgedunin (5) (prepared from 3) were evaluated using the micro test on the multi-drug-resistant Plasmodium falciparum K1 strain. The efficacy of limonoids 3 and 4 was then evaluated orally and subcutaneously in BALB/c mice infected with chloroquine-sensitive Plasmodium berghei NK65 strain in the 4-day suppressive test. RESULTS In vitro, limonoids 1-5 exhibited median inhibition concentrations (IC50) of 20.7-5.0 μM, respectively. In general, these limonoids were not toxic to normal cells (MRC-5 human fibroblasts). In vivo, 3 was more active than 4. At oral doses of 50 and 100 mg/kg/day, 3 suppressed parasitaemia versus untreated controls by 40 and 66%, respectively, evidencing a clear dose-response. CONCLUSION 6α-acetoxygedunin is an abundant natural product present in C. guianensis residual seed materials that exhibits significant in vivo anti-malarial properties.
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Affiliation(s)
- Tiago B Pereira
- />Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brasil
- />Programa de Pós-graduação em Química, Universidade Federal do Amazonas, Avenida General Rodrigo Octávio, 6200, Coroado I, Campus Universitário, 69077-000 Manaus, Amazonas Brasil
| | - Luiz F Rocha e Silva
- />Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brasil
- />Programa de Pós-graduação em Biotecnologia, Universidade Federal do Amazonas, Avenida General Rodrigo Octávio, 3000, Coroado I, Campus Universitário, 69077-000 Manaus, Amazonas Brasil
| | - Rodrigo CN Amorim
- />Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brasil
| | - Márcia RS Melo
- />Escola Superior de Ciências da Saúde, Universidade Estadual do Amazonas, Avenida Carvalho Leal, 1777, Cachoeirinha, 69065-001 Manaus, Amazonas Brasil
| | - Rita C Zacardi de Souza
- />Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, São Paulo Brasil
| | - Marcos N Eberlin
- />Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, São Paulo Brasil
| | - Emerson S Lima
- />Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-00 Manaus, Amazonas Brasil
| | - Marne C Vasconcellos
- />Faculdade de Ciências Farmacêuticas, Universidade Federal do Amazonas, Rua Comendador Alexandre Amorim, 330, Aparecida, 69103-00 Manaus, Amazonas Brasil
| | - Adrian M Pohlit
- />Laboratório de Princípios Ativos da Amazônia, Coordenação de Tecnologia e Inovação, Instituto Nacional de Pesquisas da Amazônia, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, Amazonas Brasil
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Montoia A, Rocha e Silva LF, Torres ZE, Costa DS, Henrique MC, Lima ES, Vasconcellos MC, Souza RC, Costa MR, Grafov A, Grafova I, Eberlin MN, Tadei WP, Amorim RC, Pohlit AM. Antiplasmodial activity of synthetic ellipticine derivatives and an isolated analog. Bioorg Med Chem Lett 2014; 24:2631-4. [DOI: 10.1016/j.bmcl.2014.04.070] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 04/14/2014] [Accepted: 04/18/2014] [Indexed: 10/25/2022]
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